annotate src/ms5541.asm @ 339:692903c50788

minor: fix calc_deko_divemode_sensor
author heinrichsweikamp
date Fri, 03 Jul 2015 15:08:15 +0200
parents 653a3ab08062
children 573f2251cf49
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1 ;=============================================================================
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2 ;
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3 ; File ms5541.asm
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4 ;
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5 ; Sensor subroutines
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6 ;
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7 ; Copyright (c) 2011, JD Gascuel, HeinrichsWeikamp, all right reserved.
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8 ;=============================================================================
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9 ; HISTORY
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10 ; 2011-08-03 : [mH] moving from OSTC code
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11
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653a3ab08062 rename into hwOS
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12 #include "hwos.inc" ; Mandatory header
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13 #include "math.inc" ; Math routines
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14
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15 sensors CODE
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16
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17 ;=============================================================================
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18 ; Expose internal variables, to ease debug:
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19 global D1, D2
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20 global C1, C2, C3, C4, C5, C6
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21 global xdT, xdT2, OFF, SENS, amb_pressure_avg, temperature_avg
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22
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23 ;=============================================================================
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24 global calculate_compensation
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25 calculate_compensation:
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26 ; xdT = D2 - C5 (s16 range -11.400 .. +12.350)
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27 movf C5+0,W ; Get Value to be subtracted
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28 subwf D2+0,W ; Do the Low Byte
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29 movwf xdT+0
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30 movf C5+1,W ; Then the high byte.
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31 subwfb D2+1,W
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32 movwf xdT+1
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33
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34 ; Second order temperature calculation
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35 ; xdT/128 is in range -89..+96, hence signed 8bit. dT/128 = (2*dT)/256
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36 rlcf xdT+0,W ; put hit bit in carry.
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37 rlcf xdT+1,W ; inject in high byte.
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38 movwf isr_xA+0 ; and put result in low byte.
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39 clrf isr_xA+1
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40 btfsc xdT+1,7 ; If dT < 0
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41 setf isr_xA+1 ; then signextend to -1
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42 movff isr_xA+0,isr_xB+0 ; copy A to B
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43 movff isr_xA+1,isr_xB+1
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44 call isr_signed_mult16x16 ; dT*dT --> xC (32 bits)
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45
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46 ; dT >= 0: divide by 8, ie. 3 shifts rights.
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47 ; dT < 0: divide by 2, ie. 1 shifts rights.
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48 movlw .3
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49 btfss xdT+1,7 ; Was dT negative ?
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50 movlw .1
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51 calc_loop_1:
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52 bcf STATUS,C ;dT^2 is positive, so injected zeros.
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53 rrcf isr_xC+1,F
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54 rrcf isr_xC+0,F
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55 decfsz WREG
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56 bra calc_loop_1
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57
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58 movf isr_xC+0,W ; dT2 = dT - (dT/128)*(dT/128)/(2 ...or... 8)
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59 subwf xdT+0,W
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60 movwf xdT2+0
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61 movf isr_xC+1,W
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62 subwfb xdT+1,W
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63 movwf xdT2+1
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64
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65 ; Calculate OFF = C2 + ((C4-250)*dT2)/2^12 + 10000
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66 ; (range +9.246 .. +18.887)
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67 movff C4+0,isr_xA+0
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68 movff C4+1,isr_xA+1
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69 ; movlw LOW(-.250) ; C4 - 250 --> A
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70 ; addwf C4+0,W
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71 ; movwf isr_xA+0
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72 ; movlw -1 ; HIGH(- .250) is not understood...
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73 ; addwfc C4+1,W
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74 ; movwf isr_xA+1
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75
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76 movff xdT2+0,isr_xB+0 ; dT2 --> B
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77 movff xdT2+1,isr_xB+1
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78 call isr_signed_mult16x16
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79 movlw .12-.8 ; A 12bit shift = 1 byte + 4 bits.
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80 call isr_shift_C31
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81
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82 movlw LOW(.10000) ; Add 10000
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83 addwf isr_xC+1,F
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84 movlw HIGH(.10000)
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85 addwfc isr_xC+2,F
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86
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87 movf C2+0,W ; Add C2, and save into OFF
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88 addwf isr_xC+1,W
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89 movwf OFF+0
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90 movf C2+1,W
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91 addwfc isr_xC+2,W
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92 movwf OFF+1
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93
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94 ; Calculate SENS = C1/2 + ((C3+200)*dT)/2^13 + 3000
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95 movlw LOW(.200) ; C3+200 --> A
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96 addwf C3+0,W
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97 movwf isr_xA+0
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98 movlw HIGH(.200)
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99 addwfc C3+1,W
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100 movwf isr_xA+1
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101 ; B still contains dT2
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102 call isr_signed_mult16x16 ; A*B --> C
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103 movlw .13-.8 ; A 13bit shift = 1 byte + 5 bits.
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104 call isr_shift_C31
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105
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106 bcf STATUS,C ; SENS = C1 / 2
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107 rrcf C1+1,W
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108 movwf SENS+1
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109 rrcf C1+0,W
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110 movwf SENS+0
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111
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112 movlw LOW(.3000) ; Add 3000
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113 addwf isr_xC+1,F
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114 movlw HIGH(.3000)
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115 addwfc isr_xC+2,F
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116
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117 movf isr_xC+1,W ; And sum into SENS
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118 addwf SENS+0,F
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119 movf isr_xC+2,W
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120 addwfc SENS+1,F
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121
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122 ; calculate amb_pressure = (sens * (d1-off))/2^12 + 1000
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123 movf OFF+0,W ; d1-off --> a
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124 subwf D1+0,W
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125 movwf isr_xA+0
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126 movf OFF+1,W
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127 subwfb D1+1,W
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128 movwf isr_xA+1
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129
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130 movff SENS+0,isr_xB+0 ; sens --> b
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131 movff SENS+1,isr_xB+1
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132 call isr_signed_mult16x16
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133 movlw .12-.8 ; a 12bit shift = 1 byte + 4 bits.
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134 call isr_shift_C31
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135
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136 movlw LOW(.1000) ; add 1000
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137 addwf isr_xC+1,F
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138 movlw HIGH(.1000)
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139 addwfc isr_xC+2,F
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140
92
7ca1105751c7 add sensor calibration option (PC only), some cleanup
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141 ; Add opt_pressure_adjust to result (SIGNED!)
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142 movff opt_pressure_adjust,isr_xC+0
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143
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144 btfss isr_xC+0,7 ; <0?
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145 bra pressure_extra_add ; No
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146 ; Yes
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147 comf isr_xC+0,F
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148 incf isr_xC+0,F
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149 ; Check for max. of 20mbar
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150 movlw .21
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151 cpfslt isr_xC+0
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152 clrf isr_xC+0
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153 ; Subtract
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154 movf isr_xC+0,W
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155 subwf isr_xC+1,F
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156 movlw .0
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157 subwfb isr_xC+2,F
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158 bra pressure_extra_common
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159
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160 pressure_extra_add:
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161 ; Check for max. of 20mbar
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162 movlw .21
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163 cpfslt isr_xC+0
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164 clrf isr_xC+0
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165 ; Add
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166 movf isr_xC+0,W
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167 addwf isr_xC+1,F
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168 movlw .0
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169 addwfc isr_xC+2,F
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170
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171 pressure_extra_common:
178
39f6c07ce2f6 BUGFIX: Average depth computation
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172 banksel common ; flag2 is in bank 1
0
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173 btfss simulatormode_active ; are we in simulator mode?
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174 bra calc_compensation_2 ; no
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175
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176 movff sim_pressure+0,isr_xC+1 ; override readings with simulator values
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177 movff sim_pressure+1,isr_xC+2
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178
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179 calc_compensation_2:
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180 banksel isr_backup
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181 movf isr_xC+1,W ; Then sum_up to pressure averaging buffer.
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182 addwf amb_pressure_avg+0,F
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183 movf isr_xC+2,W
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184 addwfc amb_pressure_avg+1,F
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185
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186 ; calculate temp = 200 + dT*(C6+100)/2^11
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187 movlw LOW(.100) ; C6 + 100 --> A
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188 addwf C6+0,W
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189 movwf isr_xA+0
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190 movlw HIGH(.100)
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191 addwfc C6+1,W
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192 movwf isr_xA+1
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193
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194 movff xdT2+0,isr_xB+0 ; dT2 --> B
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195 movff xdT2+1,isr_xB+1
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196 call isr_signed_mult16x16 ; A*B
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197 movlw .11-.8 ; A 12bit shift = 1 byte + 3 bits.
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198 call isr_shift_C31
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199
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200 movlw LOW(.200) ; Add 200
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201 addwf isr_xC+1,F
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202 movlw HIGH(.200)
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203 addwfc isr_xC+2,F
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204
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205 movf isr_xC+1,W
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206 addwf temperature_avg+0,F
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207 movf isr_xC+2,W
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208 addwfc temperature_avg+1,F
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209
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210 return ; Done.
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211
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212 ;=============================================================================
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213 global get_pressure_start
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214 get_pressure_start:
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215 rcall reset_MS5541
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216 movlw b'10100000' ;+3*high as start and 1+low as stop!
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217 get_pressure_start2:
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218 movwf isr1_temp
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219 movlw d'12'
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220 rcall send_data_MS5541
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221 return
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222
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223 global get_pressure_value
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224 get_pressure_value:
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225 btfsc MS5541_miso ; Conversion done?
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226 return ; No, Return
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227 rcall get_2bytes_MS5541
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228 movff dMSB,D1+1
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229 movff dLSB,D1+0
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230 return
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231
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232 ;=============================================================================
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233 global get_temperature_start
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234 get_temperature_start:
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235 rcall reset_MS5541
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236 movlw b'10010000' ;+3*high as start and 1+low as stop!
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237 bra get_pressure_start2 ; continue in "get_pressure"
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238
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239 global get_temperature_value
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240 get_temperature_value:
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241 btfsc MS5541_miso ; Conversion done?
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242 return ; No, Return
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243 rcall get_2bytes_MS5541
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244 movff dMSB,D2+1
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245 movff dLSB,D2+0
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246 return
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247
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248 ;=============================================================================
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249 global get_calibration_data
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250 get_calibration_data:
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251 banksel common
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252 bsf no_sensor_int ; disable sensor interrupts
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253 banksel isr_backup ; Back to Bank0 ISR data
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254
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255 rcall reset_MS5541
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parents:
diff changeset
256 movlw b'01010100' ;+3*high as start and 1+low as stop!
heinrichsweikamp
parents:
diff changeset
257 movwf isr1_temp
heinrichsweikamp
parents:
diff changeset
258 movlw d'13'
heinrichsweikamp
parents:
diff changeset
259 rcall send_data_MS5541
heinrichsweikamp
parents:
diff changeset
260 rcall get_2bytes_MS5541
255
ad62dff7739a add bearing option to compass
heinrichsweikamp
parents: 178
diff changeset
261 movff dMSB,ir_s8_buffer+1
ad62dff7739a add bearing option to compass
heinrichsweikamp
parents: 178
diff changeset
262 movff dLSB,ir_s8_buffer+0
0
heinrichsweikamp
parents:
diff changeset
263
heinrichsweikamp
parents:
diff changeset
264 movlw b'01011000' ;+3*high as start and 1+low as stop!
heinrichsweikamp
parents:
diff changeset
265 movwf isr1_temp
heinrichsweikamp
parents:
diff changeset
266 movlw d'13'
heinrichsweikamp
parents:
diff changeset
267 rcall send_data_MS5541
heinrichsweikamp
parents:
diff changeset
268 rcall get_2bytes_MS5541
255
ad62dff7739a add bearing option to compass
heinrichsweikamp
parents: 178
diff changeset
269 movff dMSB,ir_s8_buffer+3
ad62dff7739a add bearing option to compass
heinrichsweikamp
parents: 178
diff changeset
270 movff dLSB,ir_s8_buffer+2
0
heinrichsweikamp
parents:
diff changeset
271
heinrichsweikamp
parents:
diff changeset
272 movlw b'01100100' ;+3*high as start and 1+low as stop!
heinrichsweikamp
parents:
diff changeset
273 movwf isr1_temp
heinrichsweikamp
parents:
diff changeset
274 movlw d'13'
heinrichsweikamp
parents:
diff changeset
275 rcall send_data_MS5541
heinrichsweikamp
parents:
diff changeset
276 rcall get_2bytes_MS5541
255
ad62dff7739a add bearing option to compass
heinrichsweikamp
parents: 178
diff changeset
277 movff dMSB,ir_s8_buffer+5
ad62dff7739a add bearing option to compass
heinrichsweikamp
parents: 178
diff changeset
278 movff dLSB,ir_s8_buffer+4
0
heinrichsweikamp
parents:
diff changeset
279
heinrichsweikamp
parents:
diff changeset
280 movlw b'01101000' ;+3*high as start and 1+low as stop!
heinrichsweikamp
parents:
diff changeset
281 movwf isr1_temp
heinrichsweikamp
parents:
diff changeset
282 movlw d'13'
heinrichsweikamp
parents:
diff changeset
283 rcall send_data_MS5541
heinrichsweikamp
parents:
diff changeset
284 rcall get_2bytes_MS5541
255
ad62dff7739a add bearing option to compass
heinrichsweikamp
parents: 178
diff changeset
285 movff dMSB,ir_s8_buffer+7
ad62dff7739a add bearing option to compass
heinrichsweikamp
parents: 178
diff changeset
286 movff dLSB,ir_s8_buffer+6
0
heinrichsweikamp
parents:
diff changeset
287
heinrichsweikamp
parents:
diff changeset
288 ; calculate C1 (16Bit)
255
ad62dff7739a add bearing option to compass
heinrichsweikamp
parents: 178
diff changeset
289 movff ir_s8_buffer+1, C1+1
0
heinrichsweikamp
parents:
diff changeset
290 bcf STATUS,C
heinrichsweikamp
parents:
diff changeset
291 rrcf C1+1
heinrichsweikamp
parents:
diff changeset
292 bcf STATUS,C
heinrichsweikamp
parents:
diff changeset
293 rrcf C1+1
heinrichsweikamp
parents:
diff changeset
294 bcf STATUS,C
heinrichsweikamp
parents:
diff changeset
295 rrcf C1+1
255
ad62dff7739a add bearing option to compass
heinrichsweikamp
parents: 178
diff changeset
296 movff ir_s8_buffer+0, C1+0
0
heinrichsweikamp
parents:
diff changeset
297 bsf STATUS,C
255
ad62dff7739a add bearing option to compass
heinrichsweikamp
parents: 178
diff changeset
298 btfss ir_s8_buffer+1,0
0
heinrichsweikamp
parents:
diff changeset
299 bcf STATUS,C
heinrichsweikamp
parents:
diff changeset
300 rrcf C1+0
heinrichsweikamp
parents:
diff changeset
301 bsf STATUS,C
255
ad62dff7739a add bearing option to compass
heinrichsweikamp
parents: 178
diff changeset
302 btfss ir_s8_buffer+1,1
0
heinrichsweikamp
parents:
diff changeset
303 bcf STATUS,C
heinrichsweikamp
parents:
diff changeset
304 rrcf C1+0
heinrichsweikamp
parents:
diff changeset
305 bsf STATUS,C
255
ad62dff7739a add bearing option to compass
heinrichsweikamp
parents: 178
diff changeset
306 btfss ir_s8_buffer+1,2
0
heinrichsweikamp
parents:
diff changeset
307 bcf STATUS,C
heinrichsweikamp
parents:
diff changeset
308 rrcf C1+0
heinrichsweikamp
parents:
diff changeset
309
heinrichsweikamp
parents:
diff changeset
310 ; calculate C2 (16Bit)
255
ad62dff7739a add bearing option to compass
heinrichsweikamp
parents: 178
diff changeset
311 movff ir_s8_buffer+2, C2+0
0
heinrichsweikamp
parents:
diff changeset
312 bsf STATUS,C
255
ad62dff7739a add bearing option to compass
heinrichsweikamp
parents: 178
diff changeset
313 btfss ir_s8_buffer+3,0
0
heinrichsweikamp
parents:
diff changeset
314 bcf STATUS,C
heinrichsweikamp
parents:
diff changeset
315 rrcf C2+0
heinrichsweikamp
parents:
diff changeset
316 bsf STATUS,C
255
ad62dff7739a add bearing option to compass
heinrichsweikamp
parents: 178
diff changeset
317 btfss ir_s8_buffer+3,1
0
heinrichsweikamp
parents:
diff changeset
318 bcf STATUS,C
heinrichsweikamp
parents:
diff changeset
319 rrcf C2+0
heinrichsweikamp
parents:
diff changeset
320 bsf STATUS,C
255
ad62dff7739a add bearing option to compass
heinrichsweikamp
parents: 178
diff changeset
321 btfss ir_s8_buffer+3,2
0
heinrichsweikamp
parents:
diff changeset
322 bcf STATUS,C
heinrichsweikamp
parents:
diff changeset
323 rrcf C2+0
heinrichsweikamp
parents:
diff changeset
324 bsf STATUS,C
255
ad62dff7739a add bearing option to compass
heinrichsweikamp
parents: 178
diff changeset
325 btfss ir_s8_buffer+3,3
0
heinrichsweikamp
parents:
diff changeset
326 bcf STATUS,C
heinrichsweikamp
parents:
diff changeset
327 rrcf C2+0
heinrichsweikamp
parents:
diff changeset
328 bsf STATUS,C
255
ad62dff7739a add bearing option to compass
heinrichsweikamp
parents: 178
diff changeset
329 btfss ir_s8_buffer+3,4
0
heinrichsweikamp
parents:
diff changeset
330 bcf STATUS,C
heinrichsweikamp
parents:
diff changeset
331 rrcf C2+0
heinrichsweikamp
parents:
diff changeset
332 bsf STATUS,C
255
ad62dff7739a add bearing option to compass
heinrichsweikamp
parents: 178
diff changeset
333 btfss ir_s8_buffer+3,5
0
heinrichsweikamp
parents:
diff changeset
334 bcf STATUS,C
heinrichsweikamp
parents:
diff changeset
335 rrcf C2+0
heinrichsweikamp
parents:
diff changeset
336
255
ad62dff7739a add bearing option to compass
heinrichsweikamp
parents: 178
diff changeset
337 movff ir_s8_buffer+3, C2+1
0
heinrichsweikamp
parents:
diff changeset
338 bsf STATUS,C
255
ad62dff7739a add bearing option to compass
heinrichsweikamp
parents: 178
diff changeset
339 btfss ir_s8_buffer+0,0
0
heinrichsweikamp
parents:
diff changeset
340 bcf STATUS,C
heinrichsweikamp
parents:
diff changeset
341 rrcf C2+1
heinrichsweikamp
parents:
diff changeset
342 bsf STATUS,C
255
ad62dff7739a add bearing option to compass
heinrichsweikamp
parents: 178
diff changeset
343 btfss ir_s8_buffer+0,1
0
heinrichsweikamp
parents:
diff changeset
344 bcf STATUS,C
heinrichsweikamp
parents:
diff changeset
345 rrcf C2+1
heinrichsweikamp
parents:
diff changeset
346 bsf STATUS,C
255
ad62dff7739a add bearing option to compass
heinrichsweikamp
parents: 178
diff changeset
347 btfss ir_s8_buffer+0,2
0
heinrichsweikamp
parents:
diff changeset
348 bcf STATUS,C
heinrichsweikamp
parents:
diff changeset
349 rrcf C2+1
heinrichsweikamp
parents:
diff changeset
350 bcf STATUS,C
heinrichsweikamp
parents:
diff changeset
351 rrcf C2+1
heinrichsweikamp
parents:
diff changeset
352 bcf STATUS,C
heinrichsweikamp
parents:
diff changeset
353 rrcf C2+1
heinrichsweikamp
parents:
diff changeset
354 bcf STATUS,C
heinrichsweikamp
parents:
diff changeset
355 rrcf C2+1
heinrichsweikamp
parents:
diff changeset
356
heinrichsweikamp
parents:
diff changeset
357 ; calculate C3 (16Bit)
255
ad62dff7739a add bearing option to compass
heinrichsweikamp
parents: 178
diff changeset
358 movff ir_s8_buffer+5,C3+0
0
heinrichsweikamp
parents:
diff changeset
359 bsf STATUS,C
255
ad62dff7739a add bearing option to compass
heinrichsweikamp
parents: 178
diff changeset
360 btfss ir_s8_buffer+4,7
0
heinrichsweikamp
parents:
diff changeset
361 bcf STATUS,C
heinrichsweikamp
parents:
diff changeset
362 rlcf C3+0
heinrichsweikamp
parents:
diff changeset
363 bsf STATUS,C
255
ad62dff7739a add bearing option to compass
heinrichsweikamp
parents: 178
diff changeset
364 btfss ir_s8_buffer+4,6
0
heinrichsweikamp
parents:
diff changeset
365 bcf STATUS,C
heinrichsweikamp
parents:
diff changeset
366 rlcf C3+0
heinrichsweikamp
parents:
diff changeset
367 clrf C3+1
255
ad62dff7739a add bearing option to compass
heinrichsweikamp
parents: 178
diff changeset
368 btfsc ir_s8_buffer+5,7
0
heinrichsweikamp
parents:
diff changeset
369 bsf C3+1,1
255
ad62dff7739a add bearing option to compass
heinrichsweikamp
parents: 178
diff changeset
370 btfsc ir_s8_buffer+5,6
0
heinrichsweikamp
parents:
diff changeset
371 bsf C3+1,0
heinrichsweikamp
parents:
diff changeset
372
heinrichsweikamp
parents:
diff changeset
373 ; calculate C4 (16Bit)
255
ad62dff7739a add bearing option to compass
heinrichsweikamp
parents: 178
diff changeset
374 movff ir_s8_buffer+7,C4+0
0
heinrichsweikamp
parents:
diff changeset
375 bsf STATUS,C
255
ad62dff7739a add bearing option to compass
heinrichsweikamp
parents: 178
diff changeset
376 btfss ir_s8_buffer+6,7
0
heinrichsweikamp
parents:
diff changeset
377 bcf STATUS,C
heinrichsweikamp
parents:
diff changeset
378 rlcf C4+0
heinrichsweikamp
parents:
diff changeset
379 clrf C4+1
255
ad62dff7739a add bearing option to compass
heinrichsweikamp
parents: 178
diff changeset
380 btfsc ir_s8_buffer+7,7
0
heinrichsweikamp
parents:
diff changeset
381 bsf C4+1,0
heinrichsweikamp
parents:
diff changeset
382
heinrichsweikamp
parents:
diff changeset
383 ; C4=C4-250
heinrichsweikamp
parents:
diff changeset
384 movlw LOW(-.250) ; C4 - 250 --> C4
heinrichsweikamp
parents:
diff changeset
385 addwf C4+0,W
heinrichsweikamp
parents:
diff changeset
386 movwf C4+0
heinrichsweikamp
parents:
diff changeset
387 movlw -1 ; HIGH(- .250) is not understood...
heinrichsweikamp
parents:
diff changeset
388 addwfc C4+1,W
heinrichsweikamp
parents:
diff changeset
389 movwf C4+1
heinrichsweikamp
parents:
diff changeset
390
heinrichsweikamp
parents:
diff changeset
391 ; calculate C5 (16Bit)
255
ad62dff7739a add bearing option to compass
heinrichsweikamp
parents: 178
diff changeset
392 movff ir_s8_buffer+4,C5+0
0
heinrichsweikamp
parents:
diff changeset
393 bcf C5+0,6
255
ad62dff7739a add bearing option to compass
heinrichsweikamp
parents: 178
diff changeset
394 btfsc ir_s8_buffer+2,0
0
heinrichsweikamp
parents:
diff changeset
395 bsf C5+0,6
heinrichsweikamp
parents:
diff changeset
396 bcf C5+0,7
255
ad62dff7739a add bearing option to compass
heinrichsweikamp
parents: 178
diff changeset
397 btfsc ir_s8_buffer+2,1
0
heinrichsweikamp
parents:
diff changeset
398 bsf C5+0,7
heinrichsweikamp
parents:
diff changeset
399 clrf C5+1
255
ad62dff7739a add bearing option to compass
heinrichsweikamp
parents: 178
diff changeset
400 btfsc ir_s8_buffer+2,2
0
heinrichsweikamp
parents:
diff changeset
401 bsf C5+1,0
255
ad62dff7739a add bearing option to compass
heinrichsweikamp
parents: 178
diff changeset
402 btfsc ir_s8_buffer+2,3
0
heinrichsweikamp
parents:
diff changeset
403 bsf C5+1,1
255
ad62dff7739a add bearing option to compass
heinrichsweikamp
parents: 178
diff changeset
404 btfsc ir_s8_buffer+2,4
0
heinrichsweikamp
parents:
diff changeset
405 bsf C5+1,2
255
ad62dff7739a add bearing option to compass
heinrichsweikamp
parents: 178
diff changeset
406 btfsc ir_s8_buffer+2,5
0
heinrichsweikamp
parents:
diff changeset
407 bsf C5+1,3
heinrichsweikamp
parents:
diff changeset
408
heinrichsweikamp
parents:
diff changeset
409 ; calculate C5 = UT1
heinrichsweikamp
parents:
diff changeset
410 ; C5 = 8*C5 + 10000 (u16 range 10.000 .. +42.760)
heinrichsweikamp
parents:
diff changeset
411 clrf isr_xA+1
heinrichsweikamp
parents:
diff changeset
412 movlw d'8'
heinrichsweikamp
parents:
diff changeset
413 movwf isr_xA+0
heinrichsweikamp
parents:
diff changeset
414 movff C5+0,isr_xB+0
heinrichsweikamp
parents:
diff changeset
415 movff C5+1,isr_xB+1
heinrichsweikamp
parents:
diff changeset
416 call isr_unsigned_mult16x16 ;isr_xA*isr_xB=isr_xC
heinrichsweikamp
parents:
diff changeset
417 movff isr_xC+0,C5+0
heinrichsweikamp
parents:
diff changeset
418 movff isr_xC+1,C5+1
heinrichsweikamp
parents:
diff changeset
419 movlw LOW d'10000'
heinrichsweikamp
parents:
diff changeset
420 addwf C5+0,F
heinrichsweikamp
parents:
diff changeset
421 movlw HIGH d'10000'
heinrichsweikamp
parents:
diff changeset
422 addwfc C5+1,F ; = 8*C5 + 10000
heinrichsweikamp
parents:
diff changeset
423
heinrichsweikamp
parents:
diff changeset
424 ; calculate C6 (16Bit)
heinrichsweikamp
parents:
diff changeset
425 clrf C6+1
255
ad62dff7739a add bearing option to compass
heinrichsweikamp
parents: 178
diff changeset
426 movff ir_s8_buffer+6,C6+0
0
heinrichsweikamp
parents:
diff changeset
427 bcf C6+0,7
heinrichsweikamp
parents:
diff changeset
428
heinrichsweikamp
parents:
diff changeset
429 banksel common
heinrichsweikamp
parents:
diff changeset
430 bcf no_sensor_int ; enable sensor interrupts
heinrichsweikamp
parents:
diff changeset
431 bcf pressure_refresh ; Clear flag
heinrichsweikamp
parents:
diff changeset
432 banksel isr_backup ; Back to Bank0 ISR data
heinrichsweikamp
parents:
diff changeset
433
heinrichsweikamp
parents:
diff changeset
434 clrf sensor_state_counter ; Then reset State counter
heinrichsweikamp
parents:
diff changeset
435
heinrichsweikamp
parents:
diff changeset
436 return
heinrichsweikamp
parents:
diff changeset
437
heinrichsweikamp
parents:
diff changeset
438 ;=============================================================================
heinrichsweikamp
parents:
diff changeset
439 reset_MS5541_one:
heinrichsweikamp
parents:
diff changeset
440 bsf MS5541_mosi
heinrichsweikamp
parents:
diff changeset
441 bra send_clk_pulse ; Send one high-low sequence on MS5541_clk -> and return
heinrichsweikamp
parents:
diff changeset
442
heinrichsweikamp
parents:
diff changeset
443 reset_MS5541_zero:
heinrichsweikamp
parents:
diff changeset
444 bcf MS5541_mosi
heinrichsweikamp
parents:
diff changeset
445 bra send_clk_pulse ; Send one high-low sequence on MS5541_clk -> and return
heinrichsweikamp
parents:
diff changeset
446
heinrichsweikamp
parents:
diff changeset
447 reset_MS5541:
heinrichsweikamp
parents:
diff changeset
448 rcall reset_MS5541_one ;0
heinrichsweikamp
parents:
diff changeset
449 rcall reset_MS5541_zero
heinrichsweikamp
parents:
diff changeset
450 rcall reset_MS5541_one
heinrichsweikamp
parents:
diff changeset
451 rcall reset_MS5541_zero
heinrichsweikamp
parents:
diff changeset
452 rcall reset_MS5541_one
heinrichsweikamp
parents:
diff changeset
453 rcall reset_MS5541_zero
heinrichsweikamp
parents:
diff changeset
454 rcall reset_MS5541_one
heinrichsweikamp
parents:
diff changeset
455 rcall reset_MS5541_zero
heinrichsweikamp
parents:
diff changeset
456 rcall reset_MS5541_one
heinrichsweikamp
parents:
diff changeset
457 rcall reset_MS5541_zero
heinrichsweikamp
parents:
diff changeset
458 rcall reset_MS5541_one
heinrichsweikamp
parents:
diff changeset
459 rcall reset_MS5541_zero
heinrichsweikamp
parents:
diff changeset
460 rcall reset_MS5541_one
heinrichsweikamp
parents:
diff changeset
461 rcall reset_MS5541_zero
heinrichsweikamp
parents:
diff changeset
462 rcall reset_MS5541_one
heinrichsweikamp
parents:
diff changeset
463 rcall reset_MS5541_zero ;15
heinrichsweikamp
parents:
diff changeset
464 rcall reset_MS5541_zero
heinrichsweikamp
parents:
diff changeset
465 rcall reset_MS5541_zero
heinrichsweikamp
parents:
diff changeset
466 rcall reset_MS5541_zero
heinrichsweikamp
parents:
diff changeset
467 rcall reset_MS5541_zero
heinrichsweikamp
parents:
diff changeset
468 rcall reset_MS5541_zero ;20
heinrichsweikamp
parents:
diff changeset
469 return
heinrichsweikamp
parents:
diff changeset
470
heinrichsweikamp
parents:
diff changeset
471 get_2bytes_MS5541:
heinrichsweikamp
parents:
diff changeset
472 movlw d'8'
heinrichsweikamp
parents:
diff changeset
473 movwf clock_count
heinrichsweikamp
parents:
diff changeset
474 rcall recieve_loop
heinrichsweikamp
parents:
diff changeset
475 movff isr1_temp,dMSB
heinrichsweikamp
parents:
diff changeset
476
heinrichsweikamp
parents:
diff changeset
477 movlw d'8'
heinrichsweikamp
parents:
diff changeset
478 movwf clock_count
heinrichsweikamp
parents:
diff changeset
479 rcall recieve_loop
heinrichsweikamp
parents:
diff changeset
480 movff isr1_temp,dLSB
heinrichsweikamp
parents:
diff changeset
481 bra send_clk_pulse ; Send one high-low sequence on MS5541_clk -> and return
heinrichsweikamp
parents:
diff changeset
482 ;return
heinrichsweikamp
parents:
diff changeset
483
heinrichsweikamp
parents:
diff changeset
484 recieve_loop:
heinrichsweikamp
parents:
diff changeset
485 rcall send_clk_pulse ; Send one high-low sequence on MS5541_clk
heinrichsweikamp
parents:
diff changeset
486 btfss MS5541_miso ;MSB first
heinrichsweikamp
parents:
diff changeset
487 bcf STATUS,C
heinrichsweikamp
parents:
diff changeset
488 btfsc MS5541_miso ;MSB first
heinrichsweikamp
parents:
diff changeset
489 bsf STATUS,C
heinrichsweikamp
parents:
diff changeset
490 rlcf isr1_temp,F
heinrichsweikamp
parents:
diff changeset
491 decfsz clock_count,F
heinrichsweikamp
parents:
diff changeset
492 bra recieve_loop
heinrichsweikamp
parents:
diff changeset
493 return
heinrichsweikamp
parents:
diff changeset
494
heinrichsweikamp
parents:
diff changeset
495 send_clk_pulse:
heinrichsweikamp
parents:
diff changeset
496 bsf MS5541_clk
heinrichsweikamp
parents:
diff changeset
497 nop
heinrichsweikamp
parents:
diff changeset
498 nop
heinrichsweikamp
parents:
diff changeset
499 nop
heinrichsweikamp
parents:
diff changeset
500 nop
29
50c3e2c7ba7a adding cardinal (and ordinal) directions for the compass
heinrichsweikamp
parents: 0
diff changeset
501 nop
50c3e2c7ba7a adding cardinal (and ordinal) directions for the compass
heinrichsweikamp
parents: 0
diff changeset
502 nop
0
heinrichsweikamp
parents:
diff changeset
503 bcf MS5541_clk
heinrichsweikamp
parents:
diff changeset
504 nop
heinrichsweikamp
parents:
diff changeset
505 nop
29
50c3e2c7ba7a adding cardinal (and ordinal) directions for the compass
heinrichsweikamp
parents: 0
diff changeset
506 nop
50c3e2c7ba7a adding cardinal (and ordinal) directions for the compass
heinrichsweikamp
parents: 0
diff changeset
507 nop
0
heinrichsweikamp
parents:
diff changeset
508 return
heinrichsweikamp
parents:
diff changeset
509
heinrichsweikamp
parents:
diff changeset
510 send_data_MS5541:
heinrichsweikamp
parents:
diff changeset
511 movwf clock_count ; From WREG
heinrichsweikamp
parents:
diff changeset
512 ; send three startbits first
heinrichsweikamp
parents:
diff changeset
513 bcf MS5541_clk
29
50c3e2c7ba7a adding cardinal (and ordinal) directions for the compass
heinrichsweikamp
parents: 0
diff changeset
514 nop
50c3e2c7ba7a adding cardinal (and ordinal) directions for the compass
heinrichsweikamp
parents: 0
diff changeset
515 nop
0
heinrichsweikamp
parents:
diff changeset
516 bsf MS5541_mosi
heinrichsweikamp
parents:
diff changeset
517 movlw d'3'
heinrichsweikamp
parents:
diff changeset
518 subwf clock_count,F ; total bit counter
heinrichsweikamp
parents:
diff changeset
519 rcall send_clk_pulse ; Send one high-low sequence on MS5541_clk
heinrichsweikamp
parents:
diff changeset
520 rcall send_clk_pulse ; Send one high-low sequence on MS5541_clk
heinrichsweikamp
parents:
diff changeset
521 rcall send_clk_pulse ; Send one high-low sequence on MS5541_clk
heinrichsweikamp
parents:
diff changeset
522 ; now send 8 bytes from isr_temp1 and fill-up with zeros
heinrichsweikamp
parents:
diff changeset
523 send_data_MS5541_2:
heinrichsweikamp
parents:
diff changeset
524 bcf MS5541_clk
29
50c3e2c7ba7a adding cardinal (and ordinal) directions for the compass
heinrichsweikamp
parents: 0
diff changeset
525 nop
50c3e2c7ba7a adding cardinal (and ordinal) directions for the compass
heinrichsweikamp
parents: 0
diff changeset
526 nop
0
heinrichsweikamp
parents:
diff changeset
527
heinrichsweikamp
parents:
diff changeset
528 btfss isr1_temp,7 ;MSB first
heinrichsweikamp
parents:
diff changeset
529 bcf MS5541_mosi
heinrichsweikamp
parents:
diff changeset
530 btfsc isr1_temp,7 ;MSB first
heinrichsweikamp
parents:
diff changeset
531 bsf MS5541_mosi
heinrichsweikamp
parents:
diff changeset
532
heinrichsweikamp
parents:
diff changeset
533 bsf MS5541_clk
heinrichsweikamp
parents:
diff changeset
534
heinrichsweikamp
parents:
diff changeset
535 bcf STATUS,C
heinrichsweikamp
parents:
diff changeset
536 rlcf isr1_temp,F
29
50c3e2c7ba7a adding cardinal (and ordinal) directions for the compass
heinrichsweikamp
parents: 0
diff changeset
537 nop
50c3e2c7ba7a adding cardinal (and ordinal) directions for the compass
heinrichsweikamp
parents: 0
diff changeset
538 nop
0
heinrichsweikamp
parents:
diff changeset
539 ; nop
heinrichsweikamp
parents:
diff changeset
540 ; nop
heinrichsweikamp
parents:
diff changeset
541 ; nop
heinrichsweikamp
parents:
diff changeset
542 ; nop
heinrichsweikamp
parents:
diff changeset
543 ; bcf MS5541_clk
heinrichsweikamp
parents:
diff changeset
544
heinrichsweikamp
parents:
diff changeset
545 decfsz clock_count,F
heinrichsweikamp
parents:
diff changeset
546 bra send_data_MS5541_2
heinrichsweikamp
parents:
diff changeset
547 bcf MS5541_clk
heinrichsweikamp
parents:
diff changeset
548 return
heinrichsweikamp
parents:
diff changeset
549
heinrichsweikamp
parents:
diff changeset
550 END