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annotate src/i2c.asm @ 430:5604cd15c39f

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minor
author heinrichsweikamp
date Tue, 21 Jun 2016 12:44:19 +0200
parents 4b93354b7738
children aadfe9f2edaf
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1 ;=============================================================================
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2 ;
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3 ; File i2c.asm
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4 ;
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5 ; I2C Interface to HMC5883L and MMA8452Q
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6 ;
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7 ; HMC5883L's read address (8-Bit): 0x3D
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8 ; HMC5883L's write address (8-Bit): 0x3C
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9 ;
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10 ; MMA8452Q's read address (8-Bit): 0x39
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11 ; MMA8452Q's write address (8-Bit): 0x38
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12 ;
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13 ; LSM303D's read address (8-Bit): 0x3D
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14 ; LSM303D's write address (8-Bit): 0x3C
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15 ;
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16 ; Copyright (c) 2012, JD Gascuel, HeinrichsWeikamp, all right reserved.
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17 ;=============================================================================
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18 ; HISTORY
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19 ; 2012-08-22 : [mH] Creation
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20
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21
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22 #include "hwos.inc" ; Mandatory header
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23 #include "wait.inc"
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24 #include "math.inc"
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25
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26 #DEFINE battery_offset .29065 ; 65536-(3,1Ah/0,085mAh)
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27 #DEFINE battery_devider .365 ; 3,1Ah/0,085mAh/100 [%]
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28
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29 i2c CODE
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30
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31 WaitMSSP:
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32 decfsz i2c_temp,F ; check for timeout during I2C action
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33 bra WaitMSSP2
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34 bra I2CFail ; timeout occured
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35 WaitMSSP2:
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36 btfss PIR1,SSPIF
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37 bra WaitMSSP
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38 clrf i2c_temp
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39 bcf PIR1,SSPIF
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40 nop
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41 return
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42
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43 I2C_WaitforACK:
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44 btfss SSPCON2,ACKSTAT ; checks for ACK bit from slave
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45 return
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46 I2CFail:
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47 rcall I2CReset ; I2C Reset
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48 bcf PIR1,SSPIF
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49 clrf i2c_temp
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50 return
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51
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52 I2CReset: ; Something went wrong (Slave holds SDA low?)
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53 clrf SSP1CON1 ; wake-up slave and reset entire module
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54 clrf SSP1CON2
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55 clrf SSP1STAT
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56 bcf TRISC,3 ; SCL OUTPUT
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57 bsf TRISC,4 ; SDA Input
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58 bcf PORTC,3
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59 movlw d'9'
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60 movwf i2c_temp ; clock-out 9 clock cycles manually
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61 I2CReset_1:
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62 bsf PORTC,3 ; SCL=1
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63 nop
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64 nop
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65 nop
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66 nop
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67 btfsc PORTC,4 ; SDA=1?
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68 bra I2CReset_2 ; =1, SDA has been released from slave
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69 bcf PORTC,3 ; SCL=0
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70 nop
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71 nop
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72 bcf PORTC,3
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73 nop
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74 nop
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75 decfsz i2c_temp,F
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76 bra I2CReset_1 ; check for nine clock cycles
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77 I2CReset_2:
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78 bsf TRISC,3 ; SCL Input
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79 clrf SSP1CON1 ; setup I²C Mode
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80 WAITMS d'10' ; Reset-Timeout for I2C devices
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81 movlw b'00000000' ; with slew rate control
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82 movwf SSPSTAT
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83 movlw b'00101000'
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84 movwf SSP1CON1
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85 movlw b'00000000'
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86 movwf SSP1CON2
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87 movlw 0x27
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88 movwf SSP1ADD
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89 return
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90
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91 I2C_TX:
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92 movwf SSP1BUF
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93 rcall WaitMSSP
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94 bra I2C_WaitforACK ; Returns...
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95
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96 I2C_TwoBytesRX_div16: ; Get two bytes and devide lo:hi/16 (signed)
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97 rcall I2C_OneByteRX ; Get one byte
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98 movff SSP1BUF,hi ; Data Byte
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99 rcall I2C_OneByteRX ; Get one byte
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100 movff SSP1BUF,lo ; Data Byte
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101 I2C_TwoBytesRX_div16_2: ; devide lo:hi/16 (signed) only
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102 bcf STATUS,C
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103 btfsc hi,7 ; Copy sign bit to carry
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104 bsf STATUS,C
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105 rrcf hi ; /2
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106 rrcf lo
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107 I2C_TwoBytesRX_div8_2: ; devide lo:hi/8 (signed) only
0
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108 bcf STATUS,C
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109 btfsc hi,7 ; Copy sign bit to carry
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110 bsf STATUS,C
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111 rrcf hi ; /4
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112 rrcf lo
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113 bcf STATUS,C
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114 btfsc hi,7 ; Copy sign bit to carry
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115 bsf STATUS,C
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116 rrcf hi ; /8
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117 rrcf lo
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118 bcf STATUS,C
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119 btfsc hi,7 ; Copy sign bit to carry
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120 bsf STATUS,C
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121 rrcf hi ; /16
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122 rrcf lo
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123 return
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124
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125 global I2C_RX_accelerometer
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126 I2C_RX_accelerometer:
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127 btfsc compass_type ; compass1?
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128 bra I2C_RX_accelerometer_compass1 ; yes
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129 ;I2C_RX_accelerometer_compass0:
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130 bsf SSP1CON2,SEN ; Start condition
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131 rcall WaitMSSP
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132 movlw 0x38 ; address
0
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133 rcall I2C_TX
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134 movlw 0x00
0
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135 rcall I2C_TX
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136 bsf SSP1CON2,RSEN ; Repeated start condition (!)
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137 rcall WaitMSSP
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138 movlw 0x39 ; address
0
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139 rcall I2C_TX
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140
158
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141 rcall I2C_OneByteRX ; Get Status Byte
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142 movf SSP1BUF,W
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143
166
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144 ; Non-flipped screen:
0
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145 ; Chip orientation on the PCB requires
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146 ; Original = Corrected
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147 ; x = -x
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148 ; y = -y
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149 ; z = -z
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150
166
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151 ; Flipped screen:
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152 ; Chip orientation on the PCB requires
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153 ; Original = Corrected
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154 ; x = x
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155 ; y = y
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156 ; z = -z
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157
0
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158 rcall I2C_TwoBytesRX_div16 ; Get two bytes and devide /16 (signed)
166
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159 btfsc flip_screen ; 180° rotation ?
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160 bra I2C_RX_accelerometer2 ; Yes
0
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161 comf hi ; 16bit sign change.
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162 negf lo
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163 btfsc STATUS,C ; Carry to propagate ?
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164 incf hi,F ; YES: do it.
166
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165 I2C_RX_accelerometer2:
0
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166 movff lo,accel_DX+0
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167 movff hi,accel_DX+1 ; Copy result
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168
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169 rcall I2C_TwoBytesRX_div16 ; Get two bytes and devide /16 (signed)
166
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170 btfsc flip_screen ; 180° rotation ?
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171 bra I2C_RX_accelerometer3 ; Yes
0
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172 comf hi ; 16bit sign change.
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173 negf lo
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174 btfsc STATUS,C ; Carry to propagate ?
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175 incf hi,F ; YES: do it.
166
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176 I2C_RX_accelerometer3:
0
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177 movff lo,accel_DY+0
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178 movff hi,accel_DY+1 ; Copy result
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179
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180 rcall I2C_OneByteRX ; Get one byte
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181 movff SSP1BUF,hi ; Data Byte
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182 bsf SSP1CON2, RCEN ; Enable recieve mode
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183 rcall WaitMSSP
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184 ; According to datasheet there should be no Master Acknowlegde for the last Byte (accel_DZ+0)...
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185 movff SSP1BUF,lo ; Data Byte
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186
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187 rcall I2C_TwoBytesRX_div16_2; devide lo:hi/16 (signed) only
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188 comf hi ; 16bit sign change.
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189 negf lo
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190 btfsc STATUS,C ; Carry to propagate ?
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191 incf hi,F ; YES: do it.
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192 movff lo,accel_DZ+0
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193 movff hi,accel_DZ+1 ; Copy result
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194
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195 bsf SSP1CON2,PEN ; Stop condition
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196 rcall WaitMSSP
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197 return
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198
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199 I2C_RX_accelerometer_compass1:
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200 bsf SSP1CON2,SEN ; Start condition
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201 rcall WaitMSSP
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202 movlw 0x3C ; address
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203 rcall I2C_TX
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204 movlw b'10101000' ; 0x28 with auto-increment (MSB=1)
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205 rcall I2C_TX
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206 bsf SSP1CON2,RSEN ; Repeated start condition (!)
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207 rcall WaitMSSP
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208 movlw 0x3D ; address
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209 rcall I2C_TX
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210
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211 ; Non-flipped screen:
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212 ; Chip orientation on the PCB requires
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213 ; Original = Corrected
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214 ; x = -x
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215 ; y = -y
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216 ; z = -z
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217
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218 ; Flipped screen:
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219 ; Chip orientation on the PCB requires
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220 ; Original = Corrected
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221 ; x = x
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222 ; y = y
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223 ; z = -z
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224
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225 ; Dump the accelerator data
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226 rcall I2C_OneByteRX
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227 movff SSP1BUF,lo ;accel_DX+0
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228 rcall I2C_OneByteRX
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229 movff SSP1BUF,hi ;accel_DX+1
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230 rcall I2C_TwoBytesRX_div16_2; devide lo:hi/16 (signed) only
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231 btfsc flip_screen ; 180° rotation ?
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232 bra I2C_RX_accelerometer2_c1 ; Yes
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233 comf hi ; 16bit sign change.
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234 negf lo
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235 btfsc STATUS,C ; Carry to propagate ?
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diff changeset
236 incf hi,F ; YES: do it.
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parents: 275
diff changeset
237 I2C_RX_accelerometer2_c1:
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diff changeset
238 movff lo,accel_DX+0
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diff changeset
239 movff hi,accel_DX+1 ; Copy result
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diff changeset
240
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diff changeset
241 rcall I2C_OneByteRX
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diff changeset
242 movff SSP1BUF,lo ;accel_DY+0
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diff changeset
243 rcall I2C_OneByteRX
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diff changeset
244 movff SSP1BUF,hi ;accel_DY+1
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parents: 275
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245
ceb1b7329dce add code for new compass chip
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parents: 275
diff changeset
246 rcall I2C_TwoBytesRX_div16_2; devide lo:hi/16 (signed) only
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parents: 275
diff changeset
247 btfsc flip_screen ; 180° rotation ?
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parents: 275
diff changeset
248 bra I2C_RX_accelerometer3_c1 ; Yes
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diff changeset
249 comf hi ; 16bit sign change.
ceb1b7329dce add code for new compass chip
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diff changeset
250 negf lo
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diff changeset
251 btfsc STATUS,C ; Carry to propagate ?
ceb1b7329dce add code for new compass chip
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parents: 275
diff changeset
252 incf hi,F ; YES: do it.
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parents: 275
diff changeset
253 I2C_RX_accelerometer3_c1:
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diff changeset
254 movff lo,accel_DY+0
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diff changeset
255 movff hi,accel_DY+1 ; Copy result
ceb1b7329dce add code for new compass chip
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parents: 275
diff changeset
256
ceb1b7329dce add code for new compass chip
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diff changeset
257 rcall I2C_OneByteRX
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parents: 275
diff changeset
258 movff SSP1BUF,lo ;accel_DZ+0
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diff changeset
259 bsf SSP1CON2, RCEN ; Enable recieve mode
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260 rcall WaitMSSP
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diff changeset
261 ; According to datasheet there should be no Master Acknowlegde for the last Byte (accel_DZ+1)...
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diff changeset
262 movff SSP1BUF,hi ;accel_DZ+1
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diff changeset
263 bsf SSP1CON2,PEN ; Stop condition
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diff changeset
264 rcall WaitMSSP
ceb1b7329dce add code for new compass chip
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parents: 275
diff changeset
265 rcall I2C_TwoBytesRX_div16_2; devide lo:hi/16 (signed) only
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diff changeset
266 comf hi ; 16bit sign change for Z
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diff changeset
267 negf lo
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diff changeset
268 btfsc STATUS,C ; Carry to propagate ?
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parents: 275
diff changeset
269 incf hi,F ; YES: do it.
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parents: 275
diff changeset
270 movff lo,accel_DZ+0
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diff changeset
271 movff hi,accel_DZ+1 ; Copy result
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272 return
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273
0
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274 I2C_OneByteRX:
427
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parents: 275
diff changeset
275 bsf SSP1CON2, RCEN ; Enable recieve mode
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parents: 275
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276 rcall WaitMSSP
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diff changeset
277 bsf SSP1CON2,ACKEN ; Master acknowlegde
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278 bra WaitMSSP ; And return!
0
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279
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280 global I2C_RX_compass
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281 I2C_RX_compass:
427
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diff changeset
282 btfsc compass_type ; compass1?
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diff changeset
283 bra I2C_RX_compass1 ; yes
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diff changeset
284 ;I2C_RX_compass0:
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diff changeset
285 bsf SSP1CON2,SEN ; Start condition
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parents: 275
diff changeset
286 rcall WaitMSSP
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diff changeset
287 movlw 0x3C ; address
0
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288 rcall I2C_TX
427
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diff changeset
289 movlw 0x03
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diff changeset
290 rcall I2C_TX
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diff changeset
291 bsf SSP1CON2,PEN ; Stop condition
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diff changeset
292 rcall WaitMSSP
0
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293
427
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diff changeset
294 bcf PIR1,SSPIF
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diff changeset
295 bsf SSP1CON2,SEN ; Start condition
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parents: 275
diff changeset
296 rcall WaitMSSP
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diff changeset
297 movlw 0x3D ; address
0
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298 rcall I2C_TX
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299
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300 ; Compass IC sends data in following order:
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301 ; x MSB
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302 ; x LSB
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303 ; z MSB
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304 ; z LSB
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305 ; y MSB
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306 ; y LSB
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307
166
30ebaf72170d BUGFIX: Flip compass with flipped screen, too
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diff changeset
308 ; Non-flipped screen
0
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309 ; Chip orientation on the PCB requires
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310 ; Original = Corrected
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311 ; x = -y
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312 ; z = z
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313 ; y = x
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314
166
30ebaf72170d BUGFIX: Flip compass with flipped screen, too
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diff changeset
315 ; Flipped screen
30ebaf72170d BUGFIX: Flip compass with flipped screen, too
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diff changeset
316 ; Chip orientation on the PCB requires
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diff changeset
317 ; Original = Corrected
30ebaf72170d BUGFIX: Flip compass with flipped screen, too
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diff changeset
318 ; x = y
30ebaf72170d BUGFIX: Flip compass with flipped screen, too
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diff changeset
319 ; z = z
30ebaf72170d BUGFIX: Flip compass with flipped screen, too
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diff changeset
320 ; y = -x
30ebaf72170d BUGFIX: Flip compass with flipped screen, too
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diff changeset
321
0
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322 rcall I2C_OneByteRX ; Get one byte
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323 movff SSP1BUF,compass_DY+1; Data Byte
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324 rcall I2C_OneByteRX ; Get one byte
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325 movff SSP1BUF,compass_DY+0; Data Byte
166
30ebaf72170d BUGFIX: Flip compass with flipped screen, too
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diff changeset
326 btfsc flip_screen ; 180° rotation ?
30ebaf72170d BUGFIX: Flip compass with flipped screen, too
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diff changeset
327 bra I2C_RX_compass2 ; Yes
0
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328 banksel compass_DY
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329 comf compass_DY+1 ; 16bit sign change.
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330 negf compass_DY+0
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331 btfsc STATUS,C ; Carry to propagate ?
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332 incf compass_DY+1,F ; YES: do it.
166
30ebaf72170d BUGFIX: Flip compass with flipped screen, too
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diff changeset
333 I2C_RX_compass2:
0
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334 banksel common
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335 rcall I2C_OneByteRX ; Get one byte
427
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336 movff SSP1BUF,compass_DZ+1; Data Byte
0
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337 rcall I2C_OneByteRX ; Get one byte
427
ceb1b7329dce add code for new compass chip
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338 movff SSP1BUF,compass_DZ+0; Data Byte
0
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339 rcall I2C_OneByteRX ; Get one byte
427
ceb1b7329dce add code for new compass chip
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340 movff SSP1BUF,compass_DX+1; Data Byte
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341 bsf SSP1CON2, RCEN ; Enable recieve mode
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parents: 275
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342 rcall WaitMSSP
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343 movff SSP1BUF,compass_DX+0; Data Byte
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344 bsf SSP1CON2,PEN ; Stop condition
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345 rcall WaitMSSP
166
30ebaf72170d BUGFIX: Flip compass with flipped screen, too
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parents: 158
diff changeset
346 btfss flip_screen ; 180° rotation ?
30ebaf72170d BUGFIX: Flip compass with flipped screen, too
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parents: 158
diff changeset
347 return ; No, done.
30ebaf72170d BUGFIX: Flip compass with flipped screen, too
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parents: 158
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348 ; Yes, flip X
30ebaf72170d BUGFIX: Flip compass with flipped screen, too
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parents: 158
diff changeset
349 banksel compass_DX
30ebaf72170d BUGFIX: Flip compass with flipped screen, too
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parents: 158
diff changeset
350 comf compass_DX+1 ; 16bit sign change.
30ebaf72170d BUGFIX: Flip compass with flipped screen, too
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parents: 158
diff changeset
351 negf compass_DX+0
30ebaf72170d BUGFIX: Flip compass with flipped screen, too
heinrichsweikamp
parents: 158
diff changeset
352 btfsc STATUS,C ; Carry to propagate ?
30ebaf72170d BUGFIX: Flip compass with flipped screen, too
heinrichsweikamp
parents: 158
diff changeset
353 incf compass_DX+1,F ; YES: do it.
30ebaf72170d BUGFIX: Flip compass with flipped screen, too
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parents: 158
diff changeset
354 banksel common
0
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355 return
427
ceb1b7329dce add code for new compass chip
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parents: 275
diff changeset
356
ceb1b7329dce add code for new compass chip
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diff changeset
357 I2C_RX_compass1: ; New compass
ceb1b7329dce add code for new compass chip
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358 bsf SSP1CON2,SEN ; Start condition
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parents: 275
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359 rcall WaitMSSP
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parents: 275
diff changeset
360 movlw 0x3C ; address
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parents: 275
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361 rcall I2C_TX
ceb1b7329dce add code for new compass chip
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parents: 275
diff changeset
362 movlw b'10001000' ; 0x08 with auto-increment (MSB=1)
ceb1b7329dce add code for new compass chip
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parents: 275
diff changeset
363 rcall I2C_TX
ceb1b7329dce add code for new compass chip
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parents: 275
diff changeset
364 bsf SSP1CON2,RSEN ; Repeated start condition (!)
ceb1b7329dce add code for new compass chip
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parents: 275
diff changeset
365 rcall WaitMSSP
ceb1b7329dce add code for new compass chip
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parents: 275
diff changeset
366 movlw 0x3D ; address
ceb1b7329dce add code for new compass chip
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parents: 275
diff changeset
367 rcall I2C_TX
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
368
ceb1b7329dce add code for new compass chip
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diff changeset
369 rcall I2C_OneByteRX ; Get one byte
ceb1b7329dce add code for new compass chip
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parents: 275
diff changeset
370 movff SSP1BUF,lo ; Data Byte
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parents: 275
diff changeset
371 rcall I2C_OneByteRX ; Get one byte
ceb1b7329dce add code for new compass chip
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parents: 275
diff changeset
372 movff SSP1BUF,hi ; Data Byte
ceb1b7329dce add code for new compass chip
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parents: 275
diff changeset
373 rcall I2C_TwoBytesRX_div8_2
ceb1b7329dce add code for new compass chip
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parents: 275
diff changeset
374 movff lo,compass_DX+0
ceb1b7329dce add code for new compass chip
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parents: 275
diff changeset
375 movff hi,compass_DX+1
ceb1b7329dce add code for new compass chip
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parents: 275
diff changeset
376 btfss flip_screen ; 180° rotation ?
ceb1b7329dce add code for new compass chip
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parents: 275
diff changeset
377 bra I2C_RX_compass1_1 ; Yes
ceb1b7329dce add code for new compass chip
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diff changeset
378 ; Yes, flip X
ceb1b7329dce add code for new compass chip
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parents: 275
diff changeset
379 banksel compass_DX
ceb1b7329dce add code for new compass chip
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parents: 275
diff changeset
380 comf compass_DX+1 ; 16bit sign change.
ceb1b7329dce add code for new compass chip
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parents: 275
diff changeset
381 negf compass_DX+0
ceb1b7329dce add code for new compass chip
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parents: 275
diff changeset
382 btfsc STATUS,C ; Carry to propagate ?
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
383 incf compass_DX+1,F ; YES: do it.
ceb1b7329dce add code for new compass chip
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parents: 275
diff changeset
384 banksel common
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parents: 275
diff changeset
385 I2C_RX_compass1_1:
ceb1b7329dce add code for new compass chip
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parents: 275
diff changeset
386 rcall I2C_OneByteRX ; Get one byte
ceb1b7329dce add code for new compass chip
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parents: 275
diff changeset
387 movff SSP1BUF,lo ; Data Byte
ceb1b7329dce add code for new compass chip
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parents: 275
diff changeset
388 rcall I2C_OneByteRX ; Get one byte
ceb1b7329dce add code for new compass chip
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parents: 275
diff changeset
389 movff SSP1BUF,hi ; Data Byte
ceb1b7329dce add code for new compass chip
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parents: 275
diff changeset
390 rcall I2C_TwoBytesRX_div8_2
ceb1b7329dce add code for new compass chip
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parents: 275
diff changeset
391 movff lo,compass_DY+0
ceb1b7329dce add code for new compass chip
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parents: 275
diff changeset
392 movff hi,compass_DY+1
ceb1b7329dce add code for new compass chip
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parents: 275
diff changeset
393 btfss flip_screen ; 180° rotation ?
ceb1b7329dce add code for new compass chip
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parents: 275
diff changeset
394 bra I2C_RX_compass1_2 ; Yes
ceb1b7329dce add code for new compass chip
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diff changeset
395 ; Yes, flip Y
ceb1b7329dce add code for new compass chip
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diff changeset
396 banksel compass_DY
ceb1b7329dce add code for new compass chip
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parents: 275
diff changeset
397 comf compass_DY+1 ; 16bit sign change.
ceb1b7329dce add code for new compass chip
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parents: 275
diff changeset
398 negf compass_DY+0
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
399 btfsc STATUS,C ; Carry to propagate ?
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
400 incf compass_DY+1,F ; YES: do it.
ceb1b7329dce add code for new compass chip
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parents: 275
diff changeset
401 I2C_RX_compass1_2:
ceb1b7329dce add code for new compass chip
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parents: 275
diff changeset
402 banksel common
ceb1b7329dce add code for new compass chip
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parents: 275
diff changeset
403 rcall I2C_OneByteRX ; Get one byte
ceb1b7329dce add code for new compass chip
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parents: 275
diff changeset
404 movff SSP1BUF,lo ; Data Byte
ceb1b7329dce add code for new compass chip
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parents: 275
diff changeset
405 bsf SSP1CON2, RCEN ; Enable recieve mode
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
406 rcall WaitMSSP
ceb1b7329dce add code for new compass chip
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parents: 275
diff changeset
407 movff SSP1BUF,hi ; Data Byte
ceb1b7329dce add code for new compass chip
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parents: 275
diff changeset
408 rcall I2C_TwoBytesRX_div8_2
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
409 movff lo,compass_DZ+0
ceb1b7329dce add code for new compass chip
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parents: 275
diff changeset
410 movff hi,compass_DZ+1
ceb1b7329dce add code for new compass chip
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parents: 275
diff changeset
411 bsf SSP1CON2,PEN ; Stop condition
ceb1b7329dce add code for new compass chip
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parents: 275
diff changeset
412 rcall WaitMSSP
ceb1b7329dce add code for new compass chip
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parents: 275
diff changeset
413 return
0
heinrichsweikamp
parents:
diff changeset
414
heinrichsweikamp
parents:
diff changeset
415 global I2C_init_compass
heinrichsweikamp
parents:
diff changeset
416 I2C_init_compass:
427
ceb1b7329dce add code for new compass chip
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parents: 275
diff changeset
417 bsf compass_enabled
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parents: 275
diff changeset
418 bsf compass_type ; set flag
ceb1b7329dce add code for new compass chip
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parents: 275
diff changeset
419 bsf SSP1CON2,SEN ; Start condition
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
420 rcall WaitMSSP
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
421 movlw 0x3C ; address
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
422 rcall I2C_TX
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
423 movlw 0x0F
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
424 rcall I2C_TX
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
425 bsf SSP1CON2,PEN ; Stop condition
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
426 rcall WaitMSSP
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
427 bcf PIR1,SSPIF
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
428 bsf SSP1CON2,SEN ; Start condition
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
429 rcall WaitMSSP
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
430 movlw 0x3D ; address
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
431 rcall I2C_TX
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
432 rcall I2C_OneByteRX ; Get one byte
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
433 movlw 0x49 ; 0x49 = Compass1
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
434 cpfseq SSP1BUF
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
435 bcf compass_type ; clear flag
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
436 bsf SSP1CON2,PEN ; Stop condition
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
437 rcall WaitMSSP
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
438
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
439 btfsc compass_type ; compass1?
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
440 bra I2C_init_compass1 ; yes
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
441 ; init compass0
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
442 bsf SSP1CON2,SEN ; Start condition
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
443 rcall WaitMSSP
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
444 movlw 0x3C ; address
0
heinrichsweikamp
parents:
diff changeset
445 rcall I2C_TX
427
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
446 movlw 0x00
0
heinrichsweikamp
parents:
diff changeset
447 rcall I2C_TX
427
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
448 ; movlw b'01101001' ; ConfigA: 3Hz, 8 Samples averaged, Test Mode (Positive Bias)
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
449 movlw b'01101000' ; ConfigA: 3Hz, 8 Samples averaged
0
heinrichsweikamp
parents:
diff changeset
450 rcall I2C_TX
20
9b7dd3103545 minor cleanup
heinrichsweikamp
parents: 18
diff changeset
451 bra I2C_init_compass_common
9b7dd3103545 minor cleanup
heinrichsweikamp
parents: 18
diff changeset
452
9b7dd3103545 minor cleanup
heinrichsweikamp
parents: 18
diff changeset
453 global I2C_init_compass_fast
9b7dd3103545 minor cleanup
heinrichsweikamp
parents: 18
diff changeset
454 I2C_init_compass_fast:
427
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
455 btfsc compass_type ; compass1?
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
456 bra I2C_init_compass_fast1 ; yes
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
457 ;I2C_init_compass_fast0:
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
458 bsf SSP1CON2,SEN ; Start condition
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
459 rcall WaitMSSP
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
460 movlw 0x3C ; address
20
9b7dd3103545 minor cleanup
heinrichsweikamp
parents: 18
diff changeset
461 rcall I2C_TX
427
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
462 movlw 0x00
20
9b7dd3103545 minor cleanup
heinrichsweikamp
parents: 18
diff changeset
463 rcall I2C_TX
427
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
464 movlw b'00111000' ; ConfigA: 75Hz, 2 Samples averaged
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
465 ; movlw b'00111001' ; ConfigA: 75Hz, 2 Samples averaged, Test Mode (Positive Bias)
20
9b7dd3103545 minor cleanup
heinrichsweikamp
parents: 18
diff changeset
466 rcall I2C_TX
9b7dd3103545 minor cleanup
heinrichsweikamp
parents: 18
diff changeset
467 I2C_init_compass_common:
427
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
468 movff opt_compass_gain,i2c_temp ; 0-7 (230LSB/Gauss to 1370LSB/Gauss)
18
4e3f133dfbf4 add new opt_compass_gain option to work with more magnetic battery types
heinrichsweikamp
parents: 0
diff changeset
469 swapf i2c_temp,F
4e3f133dfbf4 add new opt_compass_gain option to work with more magnetic battery types
heinrichsweikamp
parents: 0
diff changeset
470 comf i2c_temp,F
4e3f133dfbf4 add new opt_compass_gain option to work with more magnetic battery types
heinrichsweikamp
parents: 0
diff changeset
471 bcf STATUS,C
4e3f133dfbf4 add new opt_compass_gain option to work with more magnetic battery types
heinrichsweikamp
parents: 0
diff changeset
472 rlcf i2c_temp
4e3f133dfbf4 add new opt_compass_gain option to work with more magnetic battery types
heinrichsweikamp
parents: 0
diff changeset
473 movf i2c_temp,W
4e3f133dfbf4 add new opt_compass_gain option to work with more magnetic battery types
heinrichsweikamp
parents: 0
diff changeset
474 clrf i2c_temp
0
heinrichsweikamp
parents:
diff changeset
475 rcall I2C_TX
427
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
476 movlw b'00000000' ; Continous Mode
0
heinrichsweikamp
parents:
diff changeset
477 rcall I2C_TX
427
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
478 bsf SSP1CON2,PEN ; Stop condition
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
479 rcall WaitMSSP
0
heinrichsweikamp
parents:
diff changeset
480 return
heinrichsweikamp
parents:
diff changeset
481
427
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
482 I2C_init_compass1:
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
483 bsf SSP1CON2,SEN ; Start condition
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
484 rcall WaitMSSP
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
485 movlw 0x3C ; address
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
486 rcall I2C_TX
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
487 movlw 0x9F ; 1F with auto-increment (MSB=1)
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
488 rcall I2C_TX
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
489 movlw b'00000000' ; CTRL0
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
490 rcall I2C_TX
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
491 movlw b'00101111' ; CTRL1 (6,25Hz, BDU=0, x,y,z = ON)
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
492 rcall I2C_TX
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
493 movlw b'11000000' ; CTRL2 (50Hz, +/-2g,
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
494 rcall I2C_TX
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
495 movlw b'00000000' ; CTRL3
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
496 rcall I2C_TX
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
497 movlw b'00000000' ; CTRL4
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
498 rcall I2C_TX
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
499 movlw b'01100100' ; CTRL5 HIGH res, 6,25Hz
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
500 rcall I2C_TX
429
4b93354b7738 hardware_flag handling
heinrichsweikamp
parents: 427
diff changeset
501 init_compass1_common:
427
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
502 ;movlw b'01100000' ; CTRL6 Full scale (+/-12 Gauss -> 2730LSB/Gauss)
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
503 movlw b'00000000' ; CTRL6 (+/-2 Gauss)
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
504 rcall I2C_TX
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
505 movlw b'00000000' ; CTRL7 Continuous Mode
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
506 rcall I2C_TX
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
507 bsf SSP1CON2,PEN ; Stop condition
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
508 rcall WaitMSSP
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
509 return
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
510
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
511 I2C_init_compass_fast1:
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
512 bsf SSP1CON2,SEN ; Start condition
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
513 rcall WaitMSSP
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
514 movlw 0x3C ; address
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
515 rcall I2C_TX
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
516 movlw 0x9F ; 1F with auto-increment (MSB=1)
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
517 rcall I2C_TX
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
518 movlw b'00000000' ; CTRL0
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
519 rcall I2C_TX
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
520 movlw b'01101111' ; CTRL1 (100Hz, BDU=0, x,y,z = ON)
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
521 rcall I2C_TX
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
522 movlw b'11000000' ; CTRL2 (50Hz, +/-2g,
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
523 rcall I2C_TX
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
524 movlw b'00000000' ; CTRL3
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
525 rcall I2C_TX
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
526 movlw b'00000000' ; CTRL4
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
527 rcall I2C_TX
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
528 movlw b'01110100' ; CTRL5 HIGH res, 100Hz
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
529 rcall I2C_TX
429
4b93354b7738 hardware_flag handling
heinrichsweikamp
parents: 427
diff changeset
530 bra init_compass1_common
427
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
531
0
heinrichsweikamp
parents:
diff changeset
532 global I2C_sleep_compass
heinrichsweikamp
parents:
diff changeset
533 I2C_sleep_compass:
427
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
534 bcf compass_enabled
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
535
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
536 btfsc compass_type ; compass1?
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
537 bra I2C_sleep_compass1 ; yes
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
538 ;I2C_sleep_compass0:
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
539 bsf SSP1CON2,SEN ; Start condition
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
540 rcall WaitMSSP
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
541 movlw 0x3C ; address
0
heinrichsweikamp
parents:
diff changeset
542 rcall I2C_TX
427
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
543 movlw 0x00
0
heinrichsweikamp
parents:
diff changeset
544 rcall I2C_TX
427
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
545 movlw b'01101000' ; ConfigA
0
heinrichsweikamp
parents:
diff changeset
546 rcall I2C_TX
427
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
547 movlw b'00100000' ; ConfigB
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
548 rcall I2C_TX
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
549 movlw b'00000010' ; Idle Mode
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
550 rcall I2C_TX
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
551 bsf SSP1CON2,PEN ; Stop condition
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
552 rcall WaitMSSP
0
heinrichsweikamp
parents:
diff changeset
553 return
heinrichsweikamp
parents:
diff changeset
554
427
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
555 I2C_sleep_compass1:
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
556 bsf SSP1CON2,SEN ; Start condition
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
557 rcall WaitMSSP
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
558 movlw 0x3C ; address
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
559 rcall I2C_TX
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
560 movlw 0x20 ; CTRL_REG1
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
561 rcall I2C_TX
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
562 movlw b'00000000' ; data for CTRL_REG1: acceleration sensor Power-down mode
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
563 rcall I2C_TX
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
564 bsf SSP1CON2,PEN ; Stop condition
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
565 rcall WaitMSSP
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
566 bsf SSP1CON2,SEN ; Start condition
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
567 rcall WaitMSSP
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
568 movlw 0x3C ; address
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
569 rcall I2C_TX
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
570 movlw 0x26 ; CTRL_REG7
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
571 rcall I2C_TX
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
572 movlw b'00000010' ; data for CTRL_REG7: magnetic sensor Power-down mode
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
573 rcall I2C_TX
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
574 bsf SSP1CON2,PEN ; Stop condition
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
575 rcall WaitMSSP
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
576 return
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
577
0
heinrichsweikamp
parents:
diff changeset
578
heinrichsweikamp
parents:
diff changeset
579 global I2C_init_accelerometer
heinrichsweikamp
parents:
diff changeset
580 I2C_init_accelerometer:
427
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
581 btfsc compass_type ; compass1?
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
582 return ; yes, ignore
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
583
0
heinrichsweikamp
parents:
diff changeset
584 rcall I2C_sleep_accelerometer ; Regs can only be changed in St.By mode
heinrichsweikamp
parents:
diff changeset
585
heinrichsweikamp
parents:
diff changeset
586 bsf SSP1CON2,SEN ; Start condition
heinrichsweikamp
parents:
diff changeset
587 rcall WaitMSSP
heinrichsweikamp
parents:
diff changeset
588 movlw 0x38 ; address
heinrichsweikamp
parents:
diff changeset
589 rcall I2C_TX
heinrichsweikamp
parents:
diff changeset
590 movlw 0x0E ; XYZ_DATA_CFG
heinrichsweikamp
parents:
diff changeset
591 rcall I2C_TX
heinrichsweikamp
parents:
diff changeset
592 movlw b'00000000' ; High pass Filter=0 , +/- 2g range
heinrichsweikamp
parents:
diff changeset
593 rcall I2C_TX
heinrichsweikamp
parents:
diff changeset
594 bsf SSP1CON2,PEN ; Stop condition
heinrichsweikamp
parents:
diff changeset
595 rcall WaitMSSP
heinrichsweikamp
parents:
diff changeset
596
heinrichsweikamp
parents:
diff changeset
597
heinrichsweikamp
parents:
diff changeset
598 bsf SSP1CON2,SEN ; Start condition
heinrichsweikamp
parents:
diff changeset
599 rcall WaitMSSP
heinrichsweikamp
parents:
diff changeset
600 movlw 0x38 ; address
heinrichsweikamp
parents:
diff changeset
601 rcall I2C_TX
heinrichsweikamp
parents:
diff changeset
602 movlw 0x2A ; CTRL_REG1
heinrichsweikamp
parents:
diff changeset
603 rcall I2C_TX
heinrichsweikamp
parents:
diff changeset
604 ; movlw b'00110000' ; CTRL_REG1: 160ms data rate, St.By Mode
heinrichsweikamp
parents:
diff changeset
605 movlw b'00110100' ; CTRL_REG1: 160ms data rate, St.By Mode, reduced noise mode
heinrichsweikamp
parents:
diff changeset
606 rcall I2C_TX
heinrichsweikamp
parents:
diff changeset
607 movlw b'00000010' ; CTRL_REG2: High Res in Active mode
heinrichsweikamp
parents:
diff changeset
608 rcall I2C_TX
heinrichsweikamp
parents:
diff changeset
609 bsf SSP1CON2,PEN ; Stop condition
heinrichsweikamp
parents:
diff changeset
610 rcall WaitMSSP
heinrichsweikamp
parents:
diff changeset
611
heinrichsweikamp
parents:
diff changeset
612 bsf SSP1CON2,SEN ; Start condition
heinrichsweikamp
parents:
diff changeset
613 rcall WaitMSSP
heinrichsweikamp
parents:
diff changeset
614 movlw 0x38 ; address
heinrichsweikamp
parents:
diff changeset
615 rcall I2C_TX
heinrichsweikamp
parents:
diff changeset
616 movlw 0x2A ; CTRL_REG1
heinrichsweikamp
parents:
diff changeset
617 rcall I2C_TX
heinrichsweikamp
parents:
diff changeset
618 ; movlw b'00110001' ; CTRL_REG1: 160ms data rate, Active Mode
heinrichsweikamp
parents:
diff changeset
619 movlw b'00110101' ; CTRL_REG1: 160ms data rate, St.By Mode, reduced noise mode, Active Mode
heinrichsweikamp
parents:
diff changeset
620 rcall I2C_TX
heinrichsweikamp
parents:
diff changeset
621 bsf SSP1CON2,PEN ; Stop condition
heinrichsweikamp
parents:
diff changeset
622 rcall WaitMSSP
heinrichsweikamp
parents:
diff changeset
623
heinrichsweikamp
parents:
diff changeset
624 return
heinrichsweikamp
parents:
diff changeset
625
heinrichsweikamp
parents:
diff changeset
626 global I2C_sleep_accelerometer
heinrichsweikamp
parents:
diff changeset
627 I2C_sleep_accelerometer:
427
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
628 btfsc compass_type ; compass1?
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
629 return ; yes, ignore
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
630
0
heinrichsweikamp
parents:
diff changeset
631 bsf SSP1CON2,SEN ; Start condition
heinrichsweikamp
parents:
diff changeset
632 rcall WaitMSSP
heinrichsweikamp
parents:
diff changeset
633 movlw 0x38 ; address
heinrichsweikamp
parents:
diff changeset
634 rcall I2C_TX
heinrichsweikamp
parents:
diff changeset
635 movlw 0x2A ; CTRL_REG1
heinrichsweikamp
parents:
diff changeset
636 rcall I2C_TX
heinrichsweikamp
parents:
diff changeset
637 movlw b'00000000' ; St. By Mode
heinrichsweikamp
parents:
diff changeset
638 rcall I2C_TX
heinrichsweikamp
parents:
diff changeset
639 bsf SSP1CON2,PEN ; Stop condition
heinrichsweikamp
parents:
diff changeset
640 rcall WaitMSSP
heinrichsweikamp
parents:
diff changeset
641 return
heinrichsweikamp
parents:
diff changeset
642
113
heinrichsweikamp
parents: 20
diff changeset
643 global lt2942_init
heinrichsweikamp
parents: 20
diff changeset
644 lt2942_init: ; Setup Control register B
heinrichsweikamp
parents: 20
diff changeset
645 clrf i2c_temp
heinrichsweikamp
parents: 20
diff changeset
646 movlw 0x01 ; Point to control reg B
heinrichsweikamp
parents: 20
diff changeset
647 call I2C_TX_GAUGE
heinrichsweikamp
parents: 20
diff changeset
648 movlw b'11111000' ; Automatic conversion every two seconds
heinrichsweikamp
parents: 20
diff changeset
649 movff WREG, SSP1BUF ; Data Byte
heinrichsweikamp
parents: 20
diff changeset
650 rcall WaitMSSP
heinrichsweikamp
parents: 20
diff changeset
651 rcall I2C_WaitforACK
heinrichsweikamp
parents: 20
diff changeset
652 bsf SSP1CON2,PEN ; Stop condition
heinrichsweikamp
parents: 20
diff changeset
653 rcall WaitMSSP
heinrichsweikamp
parents: 20
diff changeset
654 return
heinrichsweikamp
parents: 20
diff changeset
655
heinrichsweikamp
parents: 20
diff changeset
656 global lt2942_get_status
heinrichsweikamp
parents: 20
diff changeset
657 lt2942_get_status: ; Read status register
235
23311219dacc under construction: new hardware_flag to configure different hardware versions
heinrichsweikamp
parents: 211
diff changeset
658 bcf rechargeable ; Clear flag
113
heinrichsweikamp
parents: 20
diff changeset
659 clrf i2c_temp
heinrichsweikamp
parents: 20
diff changeset
660 movlw 0x00 ; Point to Status reg
heinrichsweikamp
parents: 20
diff changeset
661 call I2C_TX_GAUGE
heinrichsweikamp
parents: 20
diff changeset
662 call I2C_RX_GAUGE
heinrichsweikamp
parents: 20
diff changeset
663 movff SSP1BUF,WREG
heinrichsweikamp
parents: 20
diff changeset
664 btfss WREG,7 ; 2942 found?
235
23311219dacc under construction: new hardware_flag to configure different hardware versions
heinrichsweikamp
parents: 211
diff changeset
665 bsf rechargeable ; Yes, set flag
113
heinrichsweikamp
parents: 20
diff changeset
666 bsf SSP1CON2,PEN ; Stop condition
heinrichsweikamp
parents: 20
diff changeset
667 rcall WaitMSSP
heinrichsweikamp
parents: 20
diff changeset
668 return
heinrichsweikamp
parents: 20
diff changeset
669
heinrichsweikamp
parents: 20
diff changeset
670
heinrichsweikamp
parents: 20
diff changeset
671 global lt2942_get_voltage
heinrichsweikamp
parents: 20
diff changeset
672 lt2942_get_voltage: ; Read battery voltage registers
heinrichsweikamp
parents: 20
diff changeset
673 clrf i2c_temp
heinrichsweikamp
parents: 20
diff changeset
674 movlw 0x08 ; Point to voltage registers
heinrichsweikamp
parents: 20
diff changeset
675 call I2C_TX_GAUGE
heinrichsweikamp
parents: 20
diff changeset
676 call I2C_RX_GAUGE
heinrichsweikamp
parents: 20
diff changeset
677 bsf SSP1CON2,ACKEN ; Master acknowlegde
heinrichsweikamp
parents: 20
diff changeset
678 rcall WaitMSSP
heinrichsweikamp
parents: 20
diff changeset
679 movff SSP1BUF,xA+1
heinrichsweikamp
parents: 20
diff changeset
680 bsf SSP1CON2, RCEN ; Enable recieve mode
heinrichsweikamp
parents: 20
diff changeset
681 rcall WaitMSSP
heinrichsweikamp
parents: 20
diff changeset
682 movff SSP1BUF,xA+0
heinrichsweikamp
parents: 20
diff changeset
683 bsf SSP1CON2,PEN ; Stop condition
heinrichsweikamp
parents: 20
diff changeset
684 rcall WaitMSSP
heinrichsweikamp
parents: 20
diff changeset
685
heinrichsweikamp
parents: 20
diff changeset
686 ; banksel common
heinrichsweikamp
parents: 20
diff changeset
687 ; xA:2 loaded with raw values
heinrichsweikamp
parents: 20
diff changeset
688 movlw LOW .6000
heinrichsweikamp
parents: 20
diff changeset
689 movwf xB+0
heinrichsweikamp
parents: 20
diff changeset
690 movlw HIGH .6000
heinrichsweikamp
parents: 20
diff changeset
691 movwf xB+1
heinrichsweikamp
parents: 20
diff changeset
692 call mult16x16 ;xA*xB=xC
heinrichsweikamp
parents: 20
diff changeset
693
heinrichsweikamp
parents: 20
diff changeset
694 ; devide xC (32bit)/65535 for result in mV (16bit)
heinrichsweikamp
parents: 20
diff changeset
695 movlw .16
heinrichsweikamp
parents: 20
diff changeset
696 movwf i2c_temp
heinrichsweikamp
parents: 20
diff changeset
697 lt2942_get_voltage2:
heinrichsweikamp
parents: 20
diff changeset
698 bcf STATUS,C
heinrichsweikamp
parents: 20
diff changeset
699 rrcf xC+3,F
heinrichsweikamp
parents: 20
diff changeset
700 rrcf xC+2,F
heinrichsweikamp
parents: 20
diff changeset
701 rrcf xC+1,F
heinrichsweikamp
parents: 20
diff changeset
702 rrcf xC+0,F
heinrichsweikamp
parents: 20
diff changeset
703 decfsz i2c_temp,F
heinrichsweikamp
parents: 20
diff changeset
704 bra lt2942_get_voltage2
heinrichsweikamp
parents: 20
diff changeset
705
heinrichsweikamp
parents: 20
diff changeset
706 ; Update battery voltage in mV
heinrichsweikamp
parents: 20
diff changeset
707 movff xC+1,batt_voltage+1
heinrichsweikamp
parents: 20
diff changeset
708 movff xC+0,batt_voltage+0
heinrichsweikamp
parents: 20
diff changeset
709 return
heinrichsweikamp
parents: 20
diff changeset
710
heinrichsweikamp
parents: 20
diff changeset
711 ; global lt2942_get_temperature
heinrichsweikamp
parents: 20
diff changeset
712 ;lt2942_get_temperature: ; Read temperature registers
heinrichsweikamp
parents: 20
diff changeset
713 ; clrf i2c_temp
heinrichsweikamp
parents: 20
diff changeset
714 ; movlw 0x0C ; Point to temperature registers
heinrichsweikamp
parents: 20
diff changeset
715 ; call I2C_TX_GAUGE
heinrichsweikamp
parents: 20
diff changeset
716 ; call I2C_RX
heinrichsweikamp
parents: 20
diff changeset
717 ; bsf SSP1CON2,ACKEN ; Master acknowlegde
heinrichsweikamp
parents: 20
diff changeset
718 ; rcall WaitMSSP
heinrichsweikamp
parents: 20
diff changeset
719 ; movff SSP1BUF,xA+1
heinrichsweikamp
parents: 20
diff changeset
720 ; bsf SSP1CON2, RCEN ; Enable recieve mode
heinrichsweikamp
parents: 20
diff changeset
721 ; rcall WaitMSSP
heinrichsweikamp
parents: 20
diff changeset
722 ; movff SSP1BUF,xA+0
heinrichsweikamp
parents: 20
diff changeset
723 ; bsf SSP1CON2,PEN ; Stop condition
heinrichsweikamp
parents: 20
diff changeset
724 ; rcall WaitMSSP
heinrichsweikamp
parents: 20
diff changeset
725 ;
heinrichsweikamp
parents: 20
diff changeset
726 ;; banksel common
heinrichsweikamp
parents: 20
diff changeset
727 ; ; xA:2 loaded with raw values
heinrichsweikamp
parents: 20
diff changeset
728 ; movlw LOW .6000
heinrichsweikamp
parents: 20
diff changeset
729 ; movwf xB+0
heinrichsweikamp
parents: 20
diff changeset
730 ; movlw HIGH .6000
heinrichsweikamp
parents: 20
diff changeset
731 ; movwf xB+1
heinrichsweikamp
parents: 20
diff changeset
732 ; call mult16x16 ;xA*xB=xC
heinrichsweikamp
parents: 20
diff changeset
733 ;
heinrichsweikamp
parents: 20
diff changeset
734 ; ; devide xC (32bit)/65535 for result in 0.1K (16bit)
heinrichsweikamp
parents: 20
diff changeset
735 ; movlw .16
heinrichsweikamp
parents: 20
diff changeset
736 ; movwf i2c_temp
heinrichsweikamp
parents: 20
diff changeset
737 ;lt2942_get_temperature2:
heinrichsweikamp
parents: 20
diff changeset
738 ; bcf STATUS,C
heinrichsweikamp
parents: 20
diff changeset
739 ; rrcf xC+3,F
heinrichsweikamp
parents: 20
diff changeset
740 ; rrcf xC+2,F
heinrichsweikamp
parents: 20
diff changeset
741 ; rrcf xC+1,F
heinrichsweikamp
parents: 20
diff changeset
742 ; rrcf xC+0,F
heinrichsweikamp
parents: 20
diff changeset
743 ; decfsz i2c_temp,F
heinrichsweikamp
parents: 20
diff changeset
744 ; bra lt2942_get_temperature2
heinrichsweikamp
parents: 20
diff changeset
745 ;
heinrichsweikamp
parents: 20
diff changeset
746 ; movff xC+1,sub_a+1
heinrichsweikamp
parents: 20
diff changeset
747 ; movff xC+0,sub_a+0
heinrichsweikamp
parents: 20
diff changeset
748 ; movlw LOW .2731 ; Kelvin to Celcius offset
heinrichsweikamp
parents: 20
diff changeset
749 ; movwf sub_b+0
heinrichsweikamp
parents: 20
diff changeset
750 ; movlw HIGH .2731 ; Kelvin to Celcius offset
heinrichsweikamp
parents: 20
diff changeset
751 ; movwf sub_b+1
heinrichsweikamp
parents: 20
diff changeset
752 ; call subU16 ; sub_c = sub_a - sub_b (with UNSIGNED values)
heinrichsweikamp
parents: 20
diff changeset
753 ;
heinrichsweikamp
parents: 20
diff changeset
754 ; ; Update batttery_temperature in 0.1°C
heinrichsweikamp
parents: 20
diff changeset
755 ; movff sub_c+1,battery_temperature+1
heinrichsweikamp
parents: 20
diff changeset
756 ; movff sub_c+0,battery_temperature+0
heinrichsweikamp
parents: 20
diff changeset
757 ; return
heinrichsweikamp
parents: 20
diff changeset
758
heinrichsweikamp
parents: 20
diff changeset
759 global lt2942_get_accumulated_charge
heinrichsweikamp
parents: 20
diff changeset
760 lt2942_get_accumulated_charge: ; Read accumulated charge and compute percent
heinrichsweikamp
parents: 20
diff changeset
761 clrf i2c_temp
heinrichsweikamp
parents: 20
diff changeset
762 movlw 0x02 ; Point to accumulated charge registers
heinrichsweikamp
parents: 20
diff changeset
763 call I2C_TX_GAUGE
heinrichsweikamp
parents: 20
diff changeset
764 call I2C_RX_GAUGE
heinrichsweikamp
parents: 20
diff changeset
765 bsf SSP1CON2,ACKEN ; Master acknowlegde
heinrichsweikamp
parents: 20
diff changeset
766 rcall WaitMSSP
heinrichsweikamp
parents: 20
diff changeset
767 movff SSP1BUF,sub_a+1 ; battery_acumulated_charge+1
heinrichsweikamp
parents: 20
diff changeset
768 bsf SSP1CON2, RCEN ; Enable recieve mode
heinrichsweikamp
parents: 20
diff changeset
769 rcall WaitMSSP
heinrichsweikamp
parents: 20
diff changeset
770 movff SSP1BUF,sub_a+0 ; battery_acumulated_charge+0
heinrichsweikamp
parents: 20
diff changeset
771 bsf SSP1CON2,PEN ; Stop condition
heinrichsweikamp
parents: 20
diff changeset
772 rcall WaitMSSP
heinrichsweikamp
parents: 20
diff changeset
773
heinrichsweikamp
parents: 20
diff changeset
774 ; Compute batt_percent
211
heinrichsweikamp
parents: 200
diff changeset
775 ; (charge-battery_offset)/365
113
heinrichsweikamp
parents: 20
diff changeset
776 movlw LOW battery_offset
heinrichsweikamp
parents: 20
diff changeset
777 movwf sub_b+0
heinrichsweikamp
parents: 20
diff changeset
778 movlw HIGH battery_offset
heinrichsweikamp
parents: 20
diff changeset
779 movwf sub_b+1
heinrichsweikamp
parents: 20
diff changeset
780 call subU16 ; sub_c = sub_a - sub_b (with signed values)
heinrichsweikamp
parents: 20
diff changeset
781
heinrichsweikamp
parents: 20
diff changeset
782 clrf batt_percent ; Set to zero
heinrichsweikamp
parents: 20
diff changeset
783 btfsc neg_flag ; result negative?
heinrichsweikamp
parents: 20
diff changeset
784 return ; Yes, done.
heinrichsweikamp
parents: 20
diff changeset
785
heinrichsweikamp
parents: 20
diff changeset
786 ; > Zero, set batt_percent properly
heinrichsweikamp
parents: 20
diff changeset
787 movff sub_c+0,xA+0
heinrichsweikamp
parents: 20
diff changeset
788 movff sub_c+1,xA+1
heinrichsweikamp
parents: 20
diff changeset
789 movlw LOW battery_devider
heinrichsweikamp
parents: 20
diff changeset
790 movwf xB+0
heinrichsweikamp
parents: 20
diff changeset
791 movlw HIGH battery_devider
heinrichsweikamp
parents: 20
diff changeset
792 movwf xB+1
heinrichsweikamp
parents: 20
diff changeset
793 call div16x16 ;xA/xB=xC with xA+0 as remainder, uses divB as temp variable
heinrichsweikamp
parents: 20
diff changeset
794 movff xC+0,batt_percent
heinrichsweikamp
parents: 20
diff changeset
795 return
heinrichsweikamp
parents: 20
diff changeset
796
heinrichsweikamp
parents: 20
diff changeset
797 global lt2942_charge_done
heinrichsweikamp
parents: 20
diff changeset
798 lt2942_charge_done: ; Reset accumulating registers to 0xFFFF
heinrichsweikamp
parents: 20
diff changeset
799 clrf i2c_temp
heinrichsweikamp
parents: 20
diff changeset
800 movlw 0x02 ; Point to accumulated charge registers
heinrichsweikamp
parents: 20
diff changeset
801 call I2C_TX_GAUGE
heinrichsweikamp
parents: 20
diff changeset
802 movlw 0xFF
heinrichsweikamp
parents: 20
diff changeset
803 movff WREG, SSP1BUF ; Data Byte
heinrichsweikamp
parents: 20
diff changeset
804 rcall WaitMSSP
heinrichsweikamp
parents: 20
diff changeset
805 rcall I2C_WaitforACK
heinrichsweikamp
parents: 20
diff changeset
806 movlw 0xFF
heinrichsweikamp
parents: 20
diff changeset
807 movff WREG, SSP1BUF ; Data Byte
heinrichsweikamp
parents: 20
diff changeset
808 rcall WaitMSSP
heinrichsweikamp
parents: 20
diff changeset
809 rcall I2C_WaitforACK
heinrichsweikamp
parents: 20
diff changeset
810 bsf SSP1CON2,PEN ; Stop condition
heinrichsweikamp
parents: 20
diff changeset
811 rcall WaitMSSP
heinrichsweikamp
parents: 20
diff changeset
812 return
heinrichsweikamp
parents: 20
diff changeset
813
heinrichsweikamp
parents: 20
diff changeset
814 I2C_TX_GAUGE: ; Sends a byte to the LT2942 Gauge IC
heinrichsweikamp
parents: 20
diff changeset
815 movwf i2c_temp+1 ; Data byte
heinrichsweikamp
parents: 20
diff changeset
816 bsf SSP1CON2,SEN ; Start condition
heinrichsweikamp
parents: 20
diff changeset
817 rcall WaitMSSP
heinrichsweikamp
parents: 20
diff changeset
818 movlw b'11001000' ; Address byte + Write bit
heinrichsweikamp
parents: 20
diff changeset
819 movwf SSP1BUF ; control byte
heinrichsweikamp
parents: 20
diff changeset
820 rcall WaitMSSP
heinrichsweikamp
parents: 20
diff changeset
821 rcall I2C_WaitforACK
heinrichsweikamp
parents: 20
diff changeset
822 movff i2c_temp+1, SSP1BUF ; Data Byte
heinrichsweikamp
parents: 20
diff changeset
823 rcall WaitMSSP
heinrichsweikamp
parents: 20
diff changeset
824 rcall I2C_WaitforACK
heinrichsweikamp
parents: 20
diff changeset
825 return
heinrichsweikamp
parents: 20
diff changeset
826
heinrichsweikamp
parents: 20
diff changeset
827 I2C_RX_GAUGE:
heinrichsweikamp
parents: 20
diff changeset
828 bsf SSP1CON2,SEN ; Start condition
heinrichsweikamp
parents: 20
diff changeset
829 rcall WaitMSSP
heinrichsweikamp
parents: 20
diff changeset
830 movlw b'11001001' ; Address byte + Read bit
heinrichsweikamp
parents: 20
diff changeset
831 movwf SSP1BUF ; control byte
heinrichsweikamp
parents: 20
diff changeset
832 rcall WaitMSSP
heinrichsweikamp
parents: 20
diff changeset
833 rcall I2C_WaitforACK
heinrichsweikamp
parents: 20
diff changeset
834 bsf SSP1CON2, RCEN ; Enable recieve mode
heinrichsweikamp
parents: 20
diff changeset
835 rcall WaitMSSP
heinrichsweikamp
parents: 20
diff changeset
836 return
427
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
837
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
838
ceb1b7329dce add code for new compass chip
heinrichsweikamp
parents: 275
diff changeset
839 END