annotate code_part1/OSTC_code_asm_part1/isr.asm @ 342:06299199dfb9

Fix bad max depth value (fix sub16 to avoid trashing sub_b).
author JeanDo
date Fri, 20 May 2011 01:34:59 +0200
parents 2144f19fa1eb
children d5240792be51
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1
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2 ; OSTC - diving computer code
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3 ; Copyright (C) 2008 HeinrichsWeikamp GbR
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4
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5 ; This program is free software: you can redistribute it and/or modify
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6 ; it under the terms of the GNU General Public License as published by
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7 ; the Free Software Foundation, either version 3 of the License, or
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8 ; (at your option) any later version.
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9
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10 ; This program is distributed in the hope that it will be useful,
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11 ; but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 ; GNU General Public License for more details.
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14
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15 ; You should have received a copy of the GNU General Public License
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16 ; along with this program. If not, see <http://www.gnu.org/licenses/>.
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17
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18
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19 ; written by: Matthias Heinrichs, info@heinrichsweikamp.com
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20 ; written: 10/30/05
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21 ; last updated: 05/16/08
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22 ; known bugs:
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23 ; ToDo:
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24
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25 ; the timer1 module interrupts every 62.5ms (16x/second)
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26 ; temperature and pressure is averaged over 4 measurements
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27 ; flag pressure_refresh is set every 500ms
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28 ; and provides accurate pressure (+/-1mBar stable) and temperature (0.1C stable)
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29
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30 ;=============================================================================
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2144f19fa1eb BUGFIX protect against ISR changing pressure/temperature while reading it.
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31 ; Copy a 16bit value from ISR modified registers to main registers.
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32 ;
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33 ; Because the ISR can happend at any time, the read should be redone if bytes
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34 ; changed inbetween.
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35 ;
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36 ; NOTE: Destination might be in any bank, so be BANK SAFE on b
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37
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38 SAFE_2BYTE_COPY MACRO a, b
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39 local retry
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40 retry:
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41 movf a+1,W ; High byte in W, (CURRENT BANK ONLY)
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42 movff WREG,b+1 ; and destination.
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43 movff a,b ; Copy low byte.
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44 xorwf a+1,W ; High byte changed ??? (CURRENT BANK ONLY)
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45 bnz retry
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46 ENDM
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47
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48 ;=============================================================================
0
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49 uartint:
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50 btfsc simulatormode_active ; are we in simulatormode?
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51 bra simulator_int ; Yes, reading is depth in m!
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52
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53 movff RCREG,uart1_temp
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54 movlw d'96'
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55 subwf uart1_temp,F
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56 dcfsnz uart1_temp,F ; "a"
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57 bsf dump_external_eeprom ; set flag
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58 dcfsnz uart1_temp,F ; "b"
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59 bsf uart_settime ; set flag
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60 dcfsnz uart1_temp,F ; "c"
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61 bsf simulatormode_active ; set flag
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62 dcfsnz uart1_temp,F ; "d"
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63 bsf internal_eeprom_write ; set flag
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64 dcfsnz uart1_temp,F ; "e"
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65 bsf uart_send_hash ; set flag
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66 dcfsnz uart1_temp,F ; "f"
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67 bsf uart_reset_battery_stats ; set flag
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68 dcfsnz uart1_temp,F ; "g"
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69 bsf uart_send_int_eeprom ; set flag
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70 dcfsnz uart1_temp,F ; "h"
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71 bsf uart_reset_decodata ; set flag
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72 dcfsnz uart1_temp,F ; "i"
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73 bsf internal_eeprom_write2 ; set flag
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74 dcfsnz uart1_temp,F ; "j"
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75 bsf uart_send_int_eeprom2 ; set flag
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76 dcfsnz uart1_temp,F ; "k"
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77 bsf uart_store_tissue_data ; set flag
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78
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4ec488f046f4 Battery sign color coded, work on new uart-started 115200Baud bootloader (Do NOT use yet!)
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79 movlw 0xC1
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80 cpfseq RCREG ; 115200Baud Bootloader request?
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81 bra uartint1 ; No
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82 bsf uart_115200_bootloader ; Yes, set Flag
0
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83
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84 uartint1:
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85 movf RCREG,w ; unload RCREG in stand-alone simulator mode
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86 bcf PIR1,RCIF ; Clear flag
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87 bcf RCSTA,CREN ; Clear receiver status
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88 bsf RCSTA,CREN
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89 return
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90
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91 simulator_int:
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92 btfsc standalone_simulator ; ignore in standalone simulator mode
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93 bra uartint1
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94
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95 bsf LED_blue
0
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96 tstfsz RCREG ; =0x00?
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97 bra simulator_int1 ; No
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98 incf RCREG,F ; Yes, so force RCREG=1
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99
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100 simulator_int1:
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101 movf RCREG,w ; depth in m
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102 mullw d'100' ; result will be mbar
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103 movff PRODL,sim_pressure+0 ; stored for pressure overwrite
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104 movff PRODH,sim_pressure+1
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105 bra uartint1 ; exit uart int
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106
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107 ;=============================================================================
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108
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109 switch_left_int:
0
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110 bcf INTCON,INT0IF ; Clear flag
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111
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112 btfsc T0CON,TMR0ON ; Timer0 running?
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113 bra timer0_restart ; Yes, restart
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114
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115 ; OSTC 2N has flipped screen and exchanged switches...
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116 movff win_flags,WREG ; Get into Bank0
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117 btfss WREG,0
0
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118 bsf switch_left ; Set flag, button press is OK
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119 btfsc WREG,0
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120 bsf switch_right ; Set flag, button press is OK
0
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121
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122 bsf T0CON,TMR0ON ; Start Timer 0
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123 return
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124
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125
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126 switch_right_int:
0
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127 bcf INTCON3,INT1IF ; Clear flag
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128
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129 btfsc T0CON,TMR0ON ; Timer0 running?
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130 bra timer0_restart ; Yes, restart
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131
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132 ; OSTC 2N has flipped screen and exchanged switches...
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133 movff win_flags,WREG ; Get into Bank0
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134 btfsc WREG,0
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135 bsf switch_left ; Set flag, button press is OK
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136 btfss WREG,0
0
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137 bsf switch_right ; Set flag, button press is OK
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138
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139 bsf T0CON,TMR0ON ; Start Timer 0
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140 return
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141
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142 timer0_restart:
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143 bcf INTCON,TMR0IF ; Clear flag
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144 clrf T0CON ; Timer0
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145 clrf TMR0H
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146 clrf TMR0L
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147 bsf T0CON,TMR0ON ; Start Timer 0
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148 return
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149
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150 timer0int:
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151 bcf INTCON,TMR0IF ; Clear flag
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152 bcf T0CON,TMR0ON ; Stop Timer 0
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153 clrf TMR0H
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154 clrf TMR0L
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155 return
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156
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157 ;=============================================================================
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158 ;
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159
0
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160 timer1int:
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161 bcf PIR1,TMR1IF ; Clear flag
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162
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163 timer1int_debug:
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164 bcf LED_red ; LEDr off (For charge indicator)
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165
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166 movlw 0x08 ; Timer1 int after 62.5ms (=16/second)
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167 cpfslt TMR1H ; Did we miss a 1/16 second?
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168 incf timer1int_counter1,F ; Yes, add extra 1/16 second
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169
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170 movlw 0x08 ; Timer1 int after 62.5ms (=16/second)
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171 subwf TMR1H,F
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172
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173 incf timer1int_counter1,F ; Increase timer1 counter
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174
0
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175 movlw d'15' ; One second 16
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176 cpfsgt timer1int_counter1
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177 bra sensor_int_pre ; only pressure sensor
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178 rcall RTCisr ; adjust time, then query pressure sensor
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179
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180 sensor_int_pre:
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181 btfsc sleepmode ; In sleepmode?
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182 return ; Yes
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183
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184 ; Sensor interput do poll the presure/temperature sensor, download results,
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185 ; compute compensations, and store results in various shared variables.
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186 ;
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187 ; Input: interupt (every 62.5msec == 16Hz), sensor,
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188 ; last_surfpressure:2.
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189 ;
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190 ; Output: amb_pressure:2,
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191 ; temperature:2,
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192 ; rel_pressure:2,
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193 ; and the pressure_refresh flag.
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194 ;
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195 ; NOTE: averaging (4 successive value, as recommended in the MS5535 datasheet)
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196 ; is done on private variables, to avoid trashing data while reading it
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197 ; from the main code.
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198 ;
341
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199 ; NOTE: Because there is no atomic 16bits load/stores, we need to check twice
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200 ; the read data is correct. Ie. SAFE_2BYTE_COPY is mandatory to get
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201 ; amb_pressure, temperaturen or rel_pressure
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202 ;
0
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203 sensor_int:
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204 btfsc no_sensor_int ; No sensor interrupt (because it's addressed during sleep)
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205 return
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206
238
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207 incf timer1int_counter2,F ; counts to eight for state maschine
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208
238
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209 ; State 1: Clear flags and average registers, get temperature (51us) and start pressure integration (73,5us)
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210 ; State 2: Get pressure (51us), start temperature integration (73,5us) and calculate temperature compensated pressure (233us)
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211 ; State 3: Get temperature (51us) and start pressure integration (73,5us)
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212 ; State 4: Get pressure (51us), start temperature integration (73,5us) and calculate temperature compensated pressure (233us)
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213 ; State 5: Get temperature (51us) and start pressure integration (73,5us)
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214 ; State 6: Get pressure (51us), start temperature integration (73,5us) and calculate temperature compensated pressure (233us)
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215 ; State 7: Get temperature (51us) and start pressure integration (73,5us)
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216 ; State 8: Get pressure (51us), start temperature integration (73,5us), calculate temperature compensated pressure (233us) and build average for half-second update of tempperature and pressure
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217
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218 movff timer1int_counter2,isr_divB ; isr_divB used as temp here...
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219 dcfsnz isr_divB,F
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220 bra sensor_int_state1_plus_restart ; Do State 1
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221 dcfsnz isr_divB,F
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222 bra sensor_int_state2 ; Do State 2
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223 dcfsnz isr_divB,F
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224 bra sensor_int_state1 ; Do State 3
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225 dcfsnz isr_divB,F
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226 bra sensor_int_state2 ; Do State 4
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227 dcfsnz isr_divB,F
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228 bra sensor_int_state1 ; Do State 5
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229 dcfsnz isr_divB,F
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230 bra sensor_int_state2 ; Do State 6
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231 dcfsnz isr_divB,F
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232 bra sensor_int_state1 ; Do State 7
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233 ; bra sensor_int2_plus_average ; Do State 8
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234
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235 ;sensor_int2_plus_average:
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236 rcall sensor_int_state2
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237 sensor_int2_plus_average2:
340
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238 bcf STATUS,C ; clear carry bit.
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239 rrcf amb_pressure_avg+1 ; amb_pressure sum / 2
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240 rrcf amb_pressure_avg+0
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241 bcf STATUS,C ; clear carry bit, twice.
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242 rrcf amb_pressure_avg+1 ; amb_pressure sum / 4
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243 rrcf amb_pressure_avg+0
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244
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245 movff amb_pressure_avg+1,amb_pressure+1 ; copy into actual register
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246 movff amb_pressure_avg+0,amb_pressure+0
238
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247
340
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248 bcf STATUS,C
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249 btfsc temperature_avg+1,7 ; Copy sign bit to carry
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250 bsf STATUS,C
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251 rrcf temperature_avg+1 ; Signed temperature /2
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252 rrcf temperature_avg+0
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253
340
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254 bcf STATUS,C
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255 btfsc temperature_avg+1,7 ; Copy sign bit to carry
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256 bsf STATUS,C
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257 rrcf temperature_avg+1 ; Signed temperature /4
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258 rrcf temperature_avg+0
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259
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260 movff temperature_avg+1,temperature+1
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261 movff temperature_avg+0,temperature+0
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262
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263 bsf pressure_refresh ; Set flag! Temp and pressure were updated!
238
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264 clrf timer1int_counter2 ; Then reset State counter
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265
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266 btfss simulatormode_active ; are we in simulator mode?
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267 bra comp_air_pressure ; no
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268
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269 comp_air_pressure0:
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270 movlw LOW d'1000' ; yes, so simulate 1Bar surface pressure
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271 movwf last_surfpressure+0
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272 movlw HIGH d'1000'
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273 movwf last_surfpressure+1
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274
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275 comp_air_pressure:
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276 movf last_surfpressure+0,W ; compensate airpressure
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277 subwf amb_pressure+0,W
238
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278 movwf rel_pressure+0 ; rel_pressure stores depth!
0
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279
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280 movf last_surfpressure+1,W
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281 subwfb amb_pressure+1,W
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282 movwf rel_pressure+1
238
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283 btfss STATUS,N ; result is below zero?
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284 return
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285 clrf rel_pressure+0 ; Yes, do not display negative depths
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286 clrf rel_pressure+1 ; e.g. when surface air pressure dropped during the dive
0
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287 return
238
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288
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289 sensor_int_state1_plus_restart:
340
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290 ;;; bcf pressure_refresh ; clear flags
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291 clrf amb_pressure_avg+0 ; pressure average registers
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292 clrf amb_pressure_avg+1
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293 clrf temperature_avg+0
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294 clrf temperature_avg+1
238
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295
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296 sensor_int_state1:
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297 call get_temperature_value ; State 1: Get temperature
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298 call get_pressure_start ; and start pressure integration.
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299 return ; Done.
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300
9581e48a914f Some cleanup in the ISR
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301 sensor_int_state2:
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302 call get_pressure_value ; State2: Get pressure (51us)
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303 call get_temperature_start ; and start temperature integration (73,5us)
340
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304 goto calculate_compensation ; calculate temperature compensated pressure (233us)
238
9581e48a914f Some cleanup in the ISR
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305
340
ecbbbd423e86 BUGFIX save negativ temperatures in logbook (bbbug #6)
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diff changeset
306 ;=============================================================================
0
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307
96a35aeda5f2 Initial setup
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308 RTCisr:
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309 clrf timer1int_counter1 ; counts to 16 (one second / 62.5ms)
96a35aeda5f2 Initial setup
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310 bsf onesecupdate ; we have a new second!
96a35aeda5f2 Initial setup
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311
96a35aeda5f2 Initial setup
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312 bcf STATUS,Z ; are we in dive mode?
96a35aeda5f2 Initial setup
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313 btfss divemode
238
9581e48a914f Some cleanup in the ISR
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314 bra RTCisr2 ; No, must be surface or sleepmode
0
96a35aeda5f2 Initial setup
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315
96a35aeda5f2 Initial setup
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316 incf samplesecs,F ; CF20 diving seconds done
96a35aeda5f2 Initial setup
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317 decf samplesecs_value,W ; holds CF20 value (minus 1 into WREG)
96a35aeda5f2 Initial setup
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318 cpfsgt samplesecs
238
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319 bra RTCisr1 ; no
0
96a35aeda5f2 Initial setup
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320
96a35aeda5f2 Initial setup
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321 clrf samplesecs ; clear counter...
96a35aeda5f2 Initial setup
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322 bsf store_sample ; ...and set bit for profile storage
238
9581e48a914f Some cleanup in the ISR
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diff changeset
323
0
96a35aeda5f2 Initial setup
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324 RTCisr1:
96a35aeda5f2 Initial setup
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325 ; Increase re-setable average depth divetime counter
111
ed7826c740a0 1.74beta rc1
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326 incf average_divesecs+0,F ; increase stopwatch registers
0
96a35aeda5f2 Initial setup
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327 btfsc STATUS,Z
111
ed7826c740a0 1.74beta rc1
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diff changeset
328 incf average_divesecs+1,F ; increase stopwatch registers
0
96a35aeda5f2 Initial setup
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329
96a35aeda5f2 Initial setup
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330 btfss divemode2 ; displayed divetime is running?
96a35aeda5f2 Initial setup
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331 bra RTCisr2 ; No (e.g. too shallow)
96a35aeda5f2 Initial setup
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332
96a35aeda5f2 Initial setup
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333 incf divesecs,F ; increase divetime registers
96a35aeda5f2 Initial setup
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334 movlw d'59'
96a35aeda5f2 Initial setup
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335 cpfsgt divesecs
96a35aeda5f2 Initial setup
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336 bra RTCisr1a
238
9581e48a914f Some cleanup in the ISR
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diff changeset
337
0
96a35aeda5f2 Initial setup
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338 clrf divesecs
96a35aeda5f2 Initial setup
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339 bsf realdive ; this bit is always set (again) if the dive is longer then one minute
96a35aeda5f2 Initial setup
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340
96a35aeda5f2 Initial setup
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341 incf divemins+0,F ; increase divemins
96a35aeda5f2 Initial setup
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342 btfsc STATUS,Z
96a35aeda5f2 Initial setup
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343 incf divemins+1,F ; and now do the realtime clock routine anyway
96a35aeda5f2 Initial setup
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344
96a35aeda5f2 Initial setup
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345 RTCisr1a:
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346 btfss FLAG_apnoe_mode ; Are we in Apnoe mode?
96a35aeda5f2 Initial setup
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347 bra RTCisr2 ; No, skip the following
96a35aeda5f2 Initial setup
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348
96a35aeda5f2 Initial setup
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diff changeset
349 incf apnoe_secs,F ; increase descent registers
96a35aeda5f2 Initial setup
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diff changeset
350 movlw d'59'
96a35aeda5f2 Initial setup
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351 cpfsgt apnoe_secs
96a35aeda5f2 Initial setup
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352 bra RTCisr2
96a35aeda5f2 Initial setup
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353 clrf apnoe_secs
96a35aeda5f2 Initial setup
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354
96a35aeda5f2 Initial setup
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355 incf apnoe_mins,F ; increase descent mins
96a35aeda5f2 Initial setup
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356 ; Now, do the RTC routine....
96a35aeda5f2 Initial setup
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357 RTCisr2:
96a35aeda5f2 Initial setup
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diff changeset
358 incf secs,F ; adjusts seconds, minutes, hours, day, month and year. Checks for a leap year and works until 2099!
96a35aeda5f2 Initial setup
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diff changeset
359 movlw d'59'
96a35aeda5f2 Initial setup
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diff changeset
360 cpfsgt secs
96a35aeda5f2 Initial setup
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parents:
diff changeset
361 return
96a35aeda5f2 Initial setup
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diff changeset
362 clrf secs
96a35aeda5f2 Initial setup
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parents:
diff changeset
363 bsf oneminupdate
96a35aeda5f2 Initial setup
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diff changeset
364 incf mins,F
96a35aeda5f2 Initial setup
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diff changeset
365 movlw d'59'
96a35aeda5f2 Initial setup
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diff changeset
366 cpfsgt mins
96a35aeda5f2 Initial setup
heinrichsweikamp
parents:
diff changeset
367 return
96a35aeda5f2 Initial setup
heinrichsweikamp
parents:
diff changeset
368 clrf mins
96a35aeda5f2 Initial setup
heinrichsweikamp
parents:
diff changeset
369 incf hours,F
96a35aeda5f2 Initial setup
heinrichsweikamp
parents:
diff changeset
370 movlw d'23'
96a35aeda5f2 Initial setup
heinrichsweikamp
parents:
diff changeset
371 cpfsgt hours
96a35aeda5f2 Initial setup
heinrichsweikamp
parents:
diff changeset
372 return
96a35aeda5f2 Initial setup
heinrichsweikamp
parents:
diff changeset
373 clrf hours
13
3b30cd739782 1.53 beta rc2
heinrichsweikamp
parents: 0
diff changeset
374 incf day,F
43
65d5b0c8da41 New CF48, changed CF15
heinrichsweikamp
parents: 21
diff changeset
375 movff time_correction_value,secs ; Correct too slow clock
13
3b30cd739782 1.53 beta rc2
heinrichsweikamp
parents: 0
diff changeset
376
0
96a35aeda5f2 Initial setup
heinrichsweikamp
parents:
diff changeset
377 check_date:
96a35aeda5f2 Initial setup
heinrichsweikamp
parents:
diff changeset
378 movff month,isr_divB ; new month?
96a35aeda5f2 Initial setup
heinrichsweikamp
parents:
diff changeset
379 dcfsnz isr_divB,F
96a35aeda5f2 Initial setup
heinrichsweikamp
parents:
diff changeset
380 movlw .31
96a35aeda5f2 Initial setup
heinrichsweikamp
parents:
diff changeset
381 dcfsnz isr_divB,F
96a35aeda5f2 Initial setup
heinrichsweikamp
parents:
diff changeset
382 movlw .28
96a35aeda5f2 Initial setup
heinrichsweikamp
parents:
diff changeset
383 dcfsnz isr_divB,F
96a35aeda5f2 Initial setup
heinrichsweikamp
parents:
diff changeset
384 movlw .31
96a35aeda5f2 Initial setup
heinrichsweikamp
parents:
diff changeset
385 dcfsnz isr_divB,F
96a35aeda5f2 Initial setup
heinrichsweikamp
parents:
diff changeset
386 movlw .30
96a35aeda5f2 Initial setup
heinrichsweikamp
parents:
diff changeset
387 dcfsnz isr_divB,F
96a35aeda5f2 Initial setup
heinrichsweikamp
parents:
diff changeset
388 movlw .31
96a35aeda5f2 Initial setup
heinrichsweikamp
parents:
diff changeset
389 dcfsnz isr_divB,F
96a35aeda5f2 Initial setup
heinrichsweikamp
parents:
diff changeset
390 movlw .30
96a35aeda5f2 Initial setup
heinrichsweikamp
parents:
diff changeset
391 dcfsnz isr_divB,F
96a35aeda5f2 Initial setup
heinrichsweikamp
parents:
diff changeset
392 movlw .31
96a35aeda5f2 Initial setup
heinrichsweikamp
parents:
diff changeset
393 dcfsnz isr_divB,F
96a35aeda5f2 Initial setup
heinrichsweikamp
parents:
diff changeset
394 movlw .31
96a35aeda5f2 Initial setup
heinrichsweikamp
parents:
diff changeset
395 dcfsnz isr_divB,F
96a35aeda5f2 Initial setup
heinrichsweikamp
parents:
diff changeset
396 movlw .30
96a35aeda5f2 Initial setup
heinrichsweikamp
parents:
diff changeset
397 dcfsnz isr_divB,F
96a35aeda5f2 Initial setup
heinrichsweikamp
parents:
diff changeset
398 movlw .31
96a35aeda5f2 Initial setup
heinrichsweikamp
parents:
diff changeset
399 dcfsnz isr_divB,F
96a35aeda5f2 Initial setup
heinrichsweikamp
parents:
diff changeset
400 movlw .30
96a35aeda5f2 Initial setup
heinrichsweikamp
parents:
diff changeset
401 dcfsnz isr_divB,F
96a35aeda5f2 Initial setup
heinrichsweikamp
parents:
diff changeset
402 movlw .31
96a35aeda5f2 Initial setup
heinrichsweikamp
parents:
diff changeset
403 cpfsgt day,1
96a35aeda5f2 Initial setup
heinrichsweikamp
parents:
diff changeset
404 return
96a35aeda5f2 Initial setup
heinrichsweikamp
parents:
diff changeset
405 movlw .1
96a35aeda5f2 Initial setup
heinrichsweikamp
parents:
diff changeset
406 movwf day
96a35aeda5f2 Initial setup
heinrichsweikamp
parents:
diff changeset
407 incf month,F
96a35aeda5f2 Initial setup
heinrichsweikamp
parents:
diff changeset
408 movlw .12
96a35aeda5f2 Initial setup
heinrichsweikamp
parents:
diff changeset
409 cpfsgt month,1
96a35aeda5f2 Initial setup
heinrichsweikamp
parents:
diff changeset
410 return
96a35aeda5f2 Initial setup
heinrichsweikamp
parents:
diff changeset
411 movlw .1
96a35aeda5f2 Initial setup
heinrichsweikamp
parents:
diff changeset
412 movwf month
96a35aeda5f2 Initial setup
heinrichsweikamp
parents:
diff changeset
413 incf year,F
96a35aeda5f2 Initial setup
heinrichsweikamp
parents:
diff changeset
414 return