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annotate code_part1/OSTC_code_asm_part1/isr.asm @ 343:d5240792be51
BUGFIX Altimeter random value (SAFE_2BYTE_COPY was not bank safe).
| author | JeanDo |
|---|---|
| date | Sat, 21 May 2011 14:38:56 +0200 |
| parents | 2144f19fa1eb |
| children | 797e2ac42d24 |
| rev | line source |
|---|---|
| 0 | 1 |
| 2 ; OSTC - diving computer code | |
| 3 ; Copyright (C) 2008 HeinrichsWeikamp GbR | |
| 4 | |
| 5 ; This program is free software: you can redistribute it and/or modify | |
| 6 ; it under the terms of the GNU General Public License as published by | |
| 7 ; the Free Software Foundation, either version 3 of the License, or | |
| 8 ; (at your option) any later version. | |
| 9 | |
| 10 ; This program is distributed in the hope that it will be useful, | |
| 11 ; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 13 ; GNU General Public License for more details. | |
| 14 | |
| 15 ; You should have received a copy of the GNU General Public License | |
| 16 ; along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 17 | |
| 18 | |
| 19 ; written by: Matthias Heinrichs, info@heinrichsweikamp.com | |
| 20 ; written: 10/30/05 | |
| 21 ; last updated: 05/16/08 | |
| 22 ; known bugs: | |
| 23 ; ToDo: | |
| 24 | |
| 25 ; the timer1 module interrupts every 62.5ms (16x/second) | |
| 26 ; temperature and pressure is averaged over 4 measurements | |
| 27 ; flag pressure_refresh is set every 500ms | |
| 28 ; and provides accurate pressure (+/-1mBar stable) and temperature (0.1C stable) | |
| 29 | |
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30 ;============================================================================= |
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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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BUGFIX Altimeter random value (SAFE_2BYTE_COPY was not bank safe).
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36 ; Trashes: WREG and TABLAT |
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37 ; NOTE: Destination might be in any bank, so be BANK SAFE. |
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38 ; |
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39 SAFE_2BYTE_COPY MACRO from, to |
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40 local retry |
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41 retry: |
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42 movff from+1,WREG ; High byte in W. |
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43 movff WREG,to+1 ; and destination. |
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44 movff from+0,to+0 ; Copy low byte. |
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45 movff from+1,TABLAT ; another bank-safe read. |
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46 xorwf TABLAT,W ; High byte changed ? |
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47 bnz retry |
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48 ENDM |
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49 |
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50 ;============================================================================= |
| 0 | 51 uartint: |
| 52 btfsc simulatormode_active ; are we in simulatormode? | |
| 53 bra simulator_int ; Yes, reading is depth in m! | |
| 54 | |
| 55 movff RCREG,uart1_temp | |
| 56 movlw d'96' | |
| 57 subwf uart1_temp,F | |
| 58 dcfsnz uart1_temp,F ; "a" | |
| 59 bsf dump_external_eeprom ; set flag | |
| 60 dcfsnz uart1_temp,F ; "b" | |
| 61 bsf uart_settime ; set flag | |
| 62 dcfsnz uart1_temp,F ; "c" | |
| 63 bsf simulatormode_active ; set flag | |
| 64 dcfsnz uart1_temp,F ; "d" | |
| 65 bsf internal_eeprom_write ; set flag | |
| 66 dcfsnz uart1_temp,F ; "e" | |
| 67 bsf uart_send_hash ; set flag | |
| 68 dcfsnz uart1_temp,F ; "f" | |
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69 bsf uart_reset_battery_stats ; set flag |
| 0 | 70 dcfsnz uart1_temp,F ; "g" |
| 71 bsf uart_send_int_eeprom ; set flag | |
| 72 dcfsnz uart1_temp,F ; "h" | |
| 73 bsf uart_reset_decodata ; set flag | |
| 74 dcfsnz uart1_temp,F ; "i" | |
| 75 bsf internal_eeprom_write2 ; set flag | |
| 76 dcfsnz uart1_temp,F ; "j" | |
| 77 bsf uart_send_int_eeprom2 ; set flag | |
| 78 dcfsnz uart1_temp,F ; "k" | |
| 79 bsf uart_store_tissue_data ; set flag | |
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80 |
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81 movlw 0xC1 |
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82 cpfseq RCREG ; 115200Baud Bootloader request? |
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83 bra uartint1 ; No |
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84 bsf uart_115200_bootloader ; Yes, set Flag |
| 0 | 85 |
| 86 uartint1: | |
| 87 movf RCREG,w ; unload RCREG in stand-alone simulator mode | |
| 88 bcf PIR1,RCIF ; Clear flag | |
| 89 bcf RCSTA,CREN ; Clear receiver status | |
| 90 bsf RCSTA,CREN | |
| 91 return | |
| 92 | |
| 93 simulator_int: | |
| 94 btfsc standalone_simulator ; ignore in standalone simulator mode | |
| 95 bra uartint1 | |
| 96 | |
| 21 | 97 bsf LED_blue |
| 0 | 98 tstfsz RCREG ; =0x00? |
| 99 bra simulator_int1 ; No | |
| 100 incf RCREG,F ; Yes, so force RCREG=1 | |
| 101 | |
| 102 simulator_int1: | |
| 103 movf RCREG,w ; depth in m | |
| 104 mullw d'100' ; result will be mbar | |
| 105 movff PRODL,sim_pressure+0 ; stored for pressure overwrite | |
| 106 movff PRODH,sim_pressure+1 | |
| 107 bra uartint1 ; exit uart int | |
| 108 | |
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109 ;============================================================================= |
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110 |
| 238 | 111 switch_left_int: |
| 0 | 112 bcf INTCON,INT0IF ; Clear flag |
| 113 | |
| 114 btfsc T0CON,TMR0ON ; Timer0 running? | |
| 115 bra timer0_restart ; Yes, restart | |
| 116 | |
| 266 | 117 ; OSTC 2N has flipped screen and exchanged switches... |
| 118 movff win_flags,WREG ; Get into Bank0 | |
| 119 btfss WREG,0 | |
| 0 | 120 bsf switch_left ; Set flag, button press is OK |
| 266 | 121 btfsc WREG,0 |
| 122 bsf switch_right ; Set flag, button press is OK | |
| 0 | 123 |
| 124 bsf T0CON,TMR0ON ; Start Timer 0 | |
| 125 return | |
| 126 | |
| 127 | |
| 238 | 128 switch_right_int: |
| 0 | 129 bcf INTCON3,INT1IF ; Clear flag |
| 130 | |
| 131 btfsc T0CON,TMR0ON ; Timer0 running? | |
| 132 bra timer0_restart ; Yes, restart | |
| 133 | |
| 266 | 134 ; OSTC 2N has flipped screen and exchanged switches... |
| 135 movff win_flags,WREG ; Get into Bank0 | |
| 136 btfsc WREG,0 | |
| 137 bsf switch_left ; Set flag, button press is OK | |
| 138 btfss WREG,0 | |
| 0 | 139 bsf switch_right ; Set flag, button press is OK |
| 140 | |
| 141 bsf T0CON,TMR0ON ; Start Timer 0 | |
| 142 return | |
| 143 | |
| 144 timer0_restart: | |
| 145 bcf INTCON,TMR0IF ; Clear flag | |
| 146 clrf T0CON ; Timer0 | |
| 147 clrf TMR0H | |
| 148 clrf TMR0L | |
| 149 bsf T0CON,TMR0ON ; Start Timer 0 | |
| 150 return | |
| 151 | |
| 152 timer0int: | |
| 153 bcf INTCON,TMR0IF ; Clear flag | |
| 154 bcf T0CON,TMR0ON ; Stop Timer 0 | |
| 155 clrf TMR0H | |
| 156 clrf TMR0L | |
| 157 return | |
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158 |
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159 ;============================================================================= |
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160 ; |
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161 |
| 0 | 162 timer1int: |
| 163 bcf PIR1,TMR1IF ; Clear flag | |
| 164 | |
| 165 timer1int_debug: | |
| 21 | 166 bcf LED_red ; LEDr off (For charge indicator) |
| 0 | 167 |
| 168 movlw 0x08 ; Timer1 int after 62.5ms (=16/second) | |
| 169 cpfslt TMR1H ; Did we miss a 1/16 second? | |
| 170 incf timer1int_counter1,F ; Yes, add extra 1/16 second | |
| 171 | |
| 172 movlw 0x08 ; Timer1 int after 62.5ms (=16/second) | |
| 173 subwf TMR1H,F | |
| 174 | |
| 238 | 175 incf timer1int_counter1,F ; Increase timer1 counter |
| 176 | |
| 0 | 177 movlw d'15' ; One second 16 |
| 178 cpfsgt timer1int_counter1 | |
| 179 bra sensor_int_pre ; only pressure sensor | |
| 238 | 180 rcall RTCisr ; adjust time, then query pressure sensor |
| 0 | 181 |
| 182 sensor_int_pre: | |
| 238 | 183 btfsc sleepmode ; In sleepmode? |
| 184 return ; Yes | |
| 0 | 185 |
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186 ; Sensor interput do poll the presure/temperature sensor, download results, |
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187 ; compute compensations, and store results in various shared variables. |
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188 ; |
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189 ; Input: interupt (every 62.5msec == 16Hz), sensor, |
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190 ; last_surfpressure:2. |
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191 ; |
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192 ; Output: amb_pressure:2, |
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193 ; temperature:2, |
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194 ; rel_pressure:2, |
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195 ; and the pressure_refresh flag. |
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196 ; |
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197 ; NOTE: averaging (4 successive value, as recommended in the MS5535 datasheet) |
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198 ; is done on private variables, to avoid trashing data while reading it |
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199 ; from the main code. |
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200 ; |
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201 ; NOTE: Because there is no atomic 16bits load/stores, we need to check twice |
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202 ; the read data is correct. Ie. SAFE_2BYTE_COPY is mandatory to get |
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203 ; amb_pressure, temperaturen or rel_pressure |
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204 ; |
| 0 | 205 sensor_int: |
| 206 btfsc no_sensor_int ; No sensor interrupt (because it's addressed during sleep) | |
| 207 return | |
| 208 | |
| 238 | 209 incf timer1int_counter2,F ; counts to eight for state maschine |
| 0 | 210 |
| 238 | 211 ; State 1: Clear flags and average registers, get temperature (51us) and start pressure integration (73,5us) |
| 212 ; State 2: Get pressure (51us), start temperature integration (73,5us) and calculate temperature compensated pressure (233us) | |
| 213 ; State 3: Get temperature (51us) and start pressure integration (73,5us) | |
| 214 ; State 4: Get pressure (51us), start temperature integration (73,5us) and calculate temperature compensated pressure (233us) | |
| 215 ; State 5: Get temperature (51us) and start pressure integration (73,5us) | |
| 216 ; State 6: Get pressure (51us), start temperature integration (73,5us) and calculate temperature compensated pressure (233us) | |
| 217 ; State 7: Get temperature (51us) and start pressure integration (73,5us) | |
| 218 ; 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 | |
| 219 | |
| 220 movff timer1int_counter2,isr_divB ; isr_divB used as temp here... | |
| 221 dcfsnz isr_divB,F | |
| 222 bra sensor_int_state1_plus_restart ; Do State 1 | |
| 223 dcfsnz isr_divB,F | |
| 224 bra sensor_int_state2 ; Do State 2 | |
| 225 dcfsnz isr_divB,F | |
| 226 bra sensor_int_state1 ; Do State 3 | |
| 227 dcfsnz isr_divB,F | |
| 228 bra sensor_int_state2 ; Do State 4 | |
| 229 dcfsnz isr_divB,F | |
| 230 bra sensor_int_state1 ; Do State 5 | |
| 231 dcfsnz isr_divB,F | |
| 232 bra sensor_int_state2 ; Do State 6 | |
| 233 dcfsnz isr_divB,F | |
| 234 bra sensor_int_state1 ; Do State 7 | |
| 235 ; bra sensor_int2_plus_average ; Do State 8 | |
| 236 | |
| 237 ;sensor_int2_plus_average: | |
| 238 rcall sensor_int_state2 | |
| 239 sensor_int2_plus_average2: | |
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240 bcf STATUS,C ; clear carry bit. |
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241 rrcf amb_pressure_avg+1 ; amb_pressure sum / 2 |
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242 rrcf amb_pressure_avg+0 |
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243 bcf STATUS,C ; clear carry bit, twice. |
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244 rrcf amb_pressure_avg+1 ; amb_pressure sum / 4 |
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245 rrcf amb_pressure_avg+0 |
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247 movff amb_pressure_avg+1,amb_pressure+1 ; copy into actual register |
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248 movff amb_pressure_avg+0,amb_pressure+0 |
| 238 | 249 |
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250 bcf STATUS,C |
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251 btfsc temperature_avg+1,7 ; Copy sign bit to carry |
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252 bsf STATUS,C |
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253 rrcf temperature_avg+1 ; Signed temperature /2 |
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254 rrcf temperature_avg+0 |
| 0 | 255 |
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256 bcf STATUS,C |
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257 btfsc temperature_avg+1,7 ; Copy sign bit to carry |
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258 bsf STATUS,C |
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259 rrcf temperature_avg+1 ; Signed temperature /4 |
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260 rrcf temperature_avg+0 |
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261 |
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262 movff temperature_avg+1,temperature+1 |
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263 movff temperature_avg+0,temperature+0 |
| 0 | 264 |
| 265 bsf pressure_refresh ; Set flag! Temp and pressure were updated! | |
| 238 | 266 clrf timer1int_counter2 ; Then reset State counter |
| 0 | 267 |
| 268 btfss simulatormode_active ; are we in simulator mode? | |
| 269 bra comp_air_pressure ; no | |
| 270 | |
| 271 comp_air_pressure0: | |
| 272 movlw LOW d'1000' ; yes, so simulate 1Bar surface pressure | |
| 273 movwf last_surfpressure+0 | |
| 274 movlw HIGH d'1000' | |
| 275 movwf last_surfpressure+1 | |
| 276 | |
| 277 comp_air_pressure: | |
| 278 movf last_surfpressure+0,W ; compensate airpressure | |
| 279 subwf amb_pressure+0,W | |
| 238 | 280 movwf rel_pressure+0 ; rel_pressure stores depth! |
| 0 | 281 |
| 282 movf last_surfpressure+1,W | |
| 283 subwfb amb_pressure+1,W | |
| 284 movwf rel_pressure+1 | |
| 238 | 285 btfss STATUS,N ; result is below zero? |
| 286 return | |
| 287 clrf rel_pressure+0 ; Yes, do not display negative depths | |
| 288 clrf rel_pressure+1 ; e.g. when surface air pressure dropped during the dive | |
| 0 | 289 return |
| 238 | 290 |
| 291 sensor_int_state1_plus_restart: | |
|
340
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292 ;;; bcf pressure_refresh ; clear flags |
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293 clrf amb_pressure_avg+0 ; pressure average registers |
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294 clrf amb_pressure_avg+1 |
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295 clrf temperature_avg+0 |
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296 clrf temperature_avg+1 |
| 238 | 297 |
| 298 sensor_int_state1: | |
| 299 call get_temperature_value ; State 1: Get temperature | |
| 300 call get_pressure_start ; and start pressure integration. | |
| 301 return ; Done. | |
| 302 | |
| 303 sensor_int_state2: | |
| 304 call get_pressure_value ; State2: Get pressure (51us) | |
| 305 call get_temperature_start ; and start temperature integration (73,5us) | |
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306 goto calculate_compensation ; calculate temperature compensated pressure (233us) |
| 238 | 307 |
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308 ;============================================================================= |
| 0 | 309 |
| 310 RTCisr: | |
| 311 clrf timer1int_counter1 ; counts to 16 (one second / 62.5ms) | |
| 312 bsf onesecupdate ; we have a new second! | |
| 313 | |
| 314 bcf STATUS,Z ; are we in dive mode? | |
| 315 btfss divemode | |
| 238 | 316 bra RTCisr2 ; No, must be surface or sleepmode |
| 0 | 317 |
| 318 incf samplesecs,F ; CF20 diving seconds done | |
| 319 decf samplesecs_value,W ; holds CF20 value (minus 1 into WREG) | |
| 320 cpfsgt samplesecs | |
| 238 | 321 bra RTCisr1 ; no |
| 0 | 322 |
| 323 clrf samplesecs ; clear counter... | |
| 324 bsf store_sample ; ...and set bit for profile storage | |
| 238 | 325 |
| 0 | 326 RTCisr1: |
| 327 ; Increase re-setable average depth divetime counter | |
| 111 | 328 incf average_divesecs+0,F ; increase stopwatch registers |
| 0 | 329 btfsc STATUS,Z |
| 111 | 330 incf average_divesecs+1,F ; increase stopwatch registers |
| 0 | 331 |
| 332 btfss divemode2 ; displayed divetime is running? | |
| 333 bra RTCisr2 ; No (e.g. too shallow) | |
| 334 | |
| 335 incf divesecs,F ; increase divetime registers | |
| 336 movlw d'59' | |
| 337 cpfsgt divesecs | |
| 338 bra RTCisr1a | |
| 238 | 339 |
| 0 | 340 clrf divesecs |
| 341 bsf realdive ; this bit is always set (again) if the dive is longer then one minute | |
| 342 | |
| 343 incf divemins+0,F ; increase divemins | |
| 344 btfsc STATUS,Z | |
| 345 incf divemins+1,F ; and now do the realtime clock routine anyway | |
| 346 | |
| 347 RTCisr1a: | |
| 348 btfss FLAG_apnoe_mode ; Are we in Apnoe mode? | |
| 349 bra RTCisr2 ; No, skip the following | |
| 350 | |
| 351 incf apnoe_secs,F ; increase descent registers | |
| 352 movlw d'59' | |
| 353 cpfsgt apnoe_secs | |
| 354 bra RTCisr2 | |
| 355 clrf apnoe_secs | |
| 356 | |
| 357 incf apnoe_mins,F ; increase descent mins | |
| 358 ; Now, do the RTC routine.... | |
| 359 RTCisr2: | |
| 360 incf secs,F ; adjusts seconds, minutes, hours, day, month and year. Checks for a leap year and works until 2099! | |
| 361 movlw d'59' | |
| 362 cpfsgt secs | |
| 363 return | |
| 364 clrf secs | |
| 365 bsf oneminupdate | |
| 366 incf mins,F | |
| 367 movlw d'59' | |
| 368 cpfsgt mins | |
| 369 return | |
| 370 clrf mins | |
| 371 incf hours,F | |
| 372 movlw d'23' | |
| 373 cpfsgt hours | |
| 374 return | |
| 375 clrf hours | |
| 13 | 376 incf day,F |
| 43 | 377 movff time_correction_value,secs ; Correct too slow clock |
| 13 | 378 |
| 0 | 379 check_date: |
| 380 movff month,isr_divB ; new month? | |
| 381 dcfsnz isr_divB,F | |
| 382 movlw .31 | |
| 383 dcfsnz isr_divB,F | |
| 384 movlw .28 | |
| 385 dcfsnz isr_divB,F | |
| 386 movlw .31 | |
| 387 dcfsnz isr_divB,F | |
| 388 movlw .30 | |
| 389 dcfsnz isr_divB,F | |
| 390 movlw .31 | |
| 391 dcfsnz isr_divB,F | |
| 392 movlw .30 | |
| 393 dcfsnz isr_divB,F | |
| 394 movlw .31 | |
| 395 dcfsnz isr_divB,F | |
| 396 movlw .31 | |
| 397 dcfsnz isr_divB,F | |
| 398 movlw .30 | |
| 399 dcfsnz isr_divB,F | |
| 400 movlw .31 | |
| 401 dcfsnz isr_divB,F | |
| 402 movlw .30 | |
| 403 dcfsnz isr_divB,F | |
| 404 movlw .31 | |
| 405 cpfsgt day,1 | |
| 406 return | |
| 407 movlw .1 | |
| 408 movwf day | |
| 409 incf month,F | |
| 410 movlw .12 | |
| 411 cpfsgt month,1 | |
| 412 return | |
| 413 movlw .1 | |
| 414 movwf month | |
| 415 incf year,F | |
| 416 return |