Mercurial > public > mk2
annotate code_part1/OSTC_code_asm_part1/isr.asm @ 726:05cc46fe44be
minor change in licence
| author | heinrichsweikamp |
|---|---|
| date | Tue, 04 Jun 2013 18:45:01 +0200 |
| parents | de413161f00c |
| children | 380a07e4fc15 |
| rev | line source |
|---|---|
| 402 | 1 |
| 0 | 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 | |
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28 ; and provides accurate pressure (+/-1mbar stable) and temperature (0.1C stable) |
| 0 | 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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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 | |
| 330 | 80 dcfsnz uart1_temp,F ; "l" |
| 81 bsf uart_dump_screen ; set flag | |
| 578 | 82 dcfsnz uart1_temp,F ; "m" |
| 83 bsf uart_send_int_eeprom3 ; set flag | |
| 84 dcfsnz uart1_temp,F ; "n" | |
| 85 bsf internal_eeprom_write3 ; set flag | |
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86 movlw 0xC1 |
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87 cpfseq RCREG ; 115200Baud Bootloader request? |
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88 bra uartint1 ; No |
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89 bsf uart_115200_bootloader ; Yes, set Flag |
| 0 | 90 |
| 91 uartint1: | |
| 92 movf RCREG,w ; unload RCREG in stand-alone simulator mode | |
| 93 bcf PIR1,RCIF ; Clear flag | |
| 94 bcf RCSTA,CREN ; Clear receiver status | |
| 95 bsf RCSTA,CREN | |
| 96 return | |
| 97 | |
| 98 simulator_int: | |
| 345 | 99 movlw 'l' ; Received 'l' dump-screen command ? |
| 100 xorwf RCREG,W | |
| 101 bnz simulator_int2 ; NO: skip | |
| 102 bsf uart_dump_screen ; YES: set flag | |
| 103 bra uartint1 ; and this is not a depth... | |
| 104 | |
| 105 simulator_int2: | |
| 0 | 106 btfsc standalone_simulator ; ignore in standalone simulator mode |
| 107 bra uartint1 | |
| 108 | |
| 21 | 109 bsf LED_blue |
| 0 | 110 tstfsz RCREG ; =0x00? |
| 111 bra simulator_int1 ; No | |
| 112 incf RCREG,F ; Yes, so force RCREG=1 | |
| 113 | |
| 114 simulator_int1: | |
| 115 movf RCREG,w ; depth in m | |
| 347 | 116 movwf PRODL ; Copy |
| 117 | |
| 118 movlw d'140' ; Limit to 130m | |
| 119 cpfslt PRODL ; compare with value in UART | |
| 120 movwf PRODL ; Overwrite reading | |
| 121 | |
| 122 movf PRODL,w ; depth in m | |
| 0 | 123 mullw d'100' ; result will be mbar |
| 124 movff PRODL,sim_pressure+0 ; stored for pressure overwrite | |
| 125 movff PRODH,sim_pressure+1 | |
| 126 bra uartint1 ; exit uart int | |
| 127 | |
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128 ;============================================================================= |
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129 |
| 238 | 130 switch_left_int: |
| 0 | 131 bcf INTCON,INT0IF ; Clear flag |
| 132 | |
| 133 btfsc T0CON,TMR0ON ; Timer0 running? | |
| 134 bra timer0_restart ; Yes, restart | |
| 135 | |
| 266 | 136 ; OSTC 2N has flipped screen and exchanged switches... |
| 137 movff win_flags,WREG ; Get into Bank0 | |
| 138 btfss WREG,0 | |
| 0 | 139 bsf switch_left ; Set flag, button press is OK |
| 266 | 140 btfsc WREG,0 |
| 141 bsf switch_right ; Set flag, button press is OK | |
| 0 | 142 |
| 143 bsf T0CON,TMR0ON ; Start Timer 0 | |
| 144 return | |
| 145 | |
| 146 | |
| 238 | 147 switch_right_int: |
| 0 | 148 bcf INTCON3,INT1IF ; Clear flag |
| 149 | |
| 150 btfsc T0CON,TMR0ON ; Timer0 running? | |
| 151 bra timer0_restart ; Yes, restart | |
| 152 | |
| 266 | 153 ; OSTC 2N has flipped screen and exchanged switches... |
| 154 movff win_flags,WREG ; Get into Bank0 | |
| 155 btfsc WREG,0 | |
| 156 bsf switch_left ; Set flag, button press is OK | |
| 157 btfss WREG,0 | |
| 0 | 158 bsf switch_right ; Set flag, button press is OK |
| 159 | |
| 160 bsf T0CON,TMR0ON ; Start Timer 0 | |
| 161 return | |
| 162 | |
| 163 timer0_restart: | |
| 164 bcf INTCON,TMR0IF ; Clear flag | |
| 715 | 165 movlw T0CON_VALUE |
| 166 movwf T0CON ; Timer0 | |
| 0 | 167 clrf TMR0H |
| 168 clrf TMR0L | |
| 169 bsf T0CON,TMR0ON ; Start Timer 0 | |
| 170 return | |
| 171 | |
| 172 timer0int: | |
| 173 bcf INTCON,TMR0IF ; Clear flag | |
| 174 bcf T0CON,TMR0ON ; Stop Timer 0 | |
| 175 clrf TMR0H | |
| 176 clrf TMR0L | |
| 177 return | |
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178 |
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179 ;============================================================================= |
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180 ; |
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181 |
| 0 | 182 timer1int: |
| 183 timer1int_debug: | |
| 21 | 184 bcf LED_red ; LEDr off (For charge indicator) |
| 0 | 185 |
| 390 | 186 btfsc TMR1L,0 ; Wait for low clock cycle |
| 187 bra $-2 | |
| 391 | 188 btfss TMR1L,0 ; Still high? |
| 390 | 189 bra $-2 ; max. loop time: 61µs |
| 378 | 190 |
| 0 | 191 movlw 0x08 ; Timer1 int after 62.5ms (=16/second) |
| 391 | 192 cpfslt TMR1H ; Did we miss a 1/16 second? |
| 193 incf timer1int_counter1,F ; Yes, add extra 1/16 second | |
| 194 | |
| 195 movlw 0x08 ; Timer1 int after 62.5ms (=16/second) | |
| 0 | 196 subwf TMR1H,F |
| 391 | 197 bcf PIR1,TMR1IF ; Clear flag |
| 0 | 198 |
| 238 | 199 incf timer1int_counter1,F ; Increase timer1 counter |
| 200 | |
| 0 | 201 movlw d'15' ; One second 16 |
| 202 cpfsgt timer1int_counter1 | |
| 203 bra sensor_int_pre ; only pressure sensor | |
| 238 | 204 rcall RTCisr ; adjust time, then query pressure sensor |
| 0 | 205 |
| 206 sensor_int_pre: | |
| 238 | 207 btfsc sleepmode ; In sleepmode? |
| 208 return ; Yes | |
| 0 | 209 |
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210 ; Sensor interput do poll the presure/temperature sensor, download results, |
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211 ; compute compensations, and store results in various shared variables. |
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212 ; |
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213 ; Input: interupt (every 62.5msec == 16Hz), sensor, |
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214 ; last_surfpressure:2. |
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215 ; |
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216 ; Output: amb_pressure:2, |
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217 ; temperature:2, |
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218 ; rel_pressure:2, |
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219 ; and the pressure_refresh flag. |
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220 ; |
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221 ; NOTE: averaging (4 successive value, as recommended in the MS5535 datasheet) |
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222 ; is done on private variables, to avoid trashing data while reading it |
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223 ; from the main code. |
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224 ; |
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225 ; NOTE: Because there is no atomic 16bits load/stores, we need to check twice |
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226 ; the read data is correct. Ie. SAFE_2BYTE_COPY is mandatory to get |
| 344 | 227 ; amb_pressure, temperature or rel_pressure |
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228 ; |
| 0 | 229 sensor_int: |
| 230 btfsc no_sensor_int ; No sensor interrupt (because it's addressed during sleep) | |
| 231 return | |
| 232 | |
| 238 | 233 incf timer1int_counter2,F ; counts to eight for state maschine |
| 0 | 234 |
| 238 | 235 ; State 1: Clear flags and average registers, get temperature (51us) and start pressure integration (73,5us) |
| 236 ; State 2: Get pressure (51us), start temperature integration (73,5us) and calculate temperature compensated pressure (233us) | |
| 237 ; State 3: Get temperature (51us) and start pressure integration (73,5us) | |
| 238 ; State 4: Get pressure (51us), start temperature integration (73,5us) and calculate temperature compensated pressure (233us) | |
| 239 ; State 5: Get temperature (51us) and start pressure integration (73,5us) | |
| 240 ; State 6: Get pressure (51us), start temperature integration (73,5us) and calculate temperature compensated pressure (233us) | |
| 241 ; State 7: Get temperature (51us) and start pressure integration (73,5us) | |
| 242 ; 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 | |
| 243 | |
| 244 movff timer1int_counter2,isr_divB ; isr_divB used as temp here... | |
| 245 dcfsnz isr_divB,F | |
| 246 bra sensor_int_state1_plus_restart ; Do State 1 | |
| 247 dcfsnz isr_divB,F | |
| 248 bra sensor_int_state2 ; Do State 2 | |
| 249 dcfsnz isr_divB,F | |
| 250 bra sensor_int_state1 ; Do State 3 | |
| 251 dcfsnz isr_divB,F | |
| 252 bra sensor_int_state2 ; Do State 4 | |
| 253 dcfsnz isr_divB,F | |
| 254 bra sensor_int_state1 ; Do State 5 | |
| 255 dcfsnz isr_divB,F | |
| 256 bra sensor_int_state2 ; Do State 6 | |
| 257 dcfsnz isr_divB,F | |
| 258 bra sensor_int_state1 ; Do State 7 | |
| 259 ; bra sensor_int2_plus_average ; Do State 8 | |
| 260 | |
| 261 ;sensor_int2_plus_average: | |
| 262 rcall sensor_int_state2 | |
| 263 sensor_int2_plus_average2: | |
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264 bcf STATUS,C ; clear carry bit. |
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265 rrcf amb_pressure_avg+1 ; amb_pressure sum / 2 |
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266 rrcf amb_pressure_avg+0 |
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267 bcf STATUS,C ; clear carry bit, twice. |
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268 rrcf amb_pressure_avg+1 ; amb_pressure sum / 4 |
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269 rrcf amb_pressure_avg+0 |
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270 |
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271 movff amb_pressure_avg+1,amb_pressure+1 ; copy into actual register |
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272 movff amb_pressure_avg+0,amb_pressure+0 |
| 238 | 273 |
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274 bcf STATUS,C |
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275 btfsc temperature_avg+1,7 ; Copy sign bit to carry |
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276 bsf STATUS,C |
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277 rrcf temperature_avg+1 ; Signed temperature /2 |
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278 rrcf temperature_avg+0 |
| 0 | 279 |
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280 bcf STATUS,C |
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281 btfsc temperature_avg+1,7 ; Copy sign bit to carry |
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282 bsf STATUS,C |
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283 rrcf temperature_avg+1 ; Signed temperature /4 |
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284 rrcf temperature_avg+0 |
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285 |
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286 movff temperature_avg+1,temperature+1 |
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287 movff temperature_avg+0,temperature+0 |
| 0 | 288 |
| 289 bsf pressure_refresh ; Set flag! Temp and pressure were updated! | |
| 238 | 290 clrf timer1int_counter2 ; Then reset State counter |
| 0 | 291 |
| 292 btfss simulatormode_active ; are we in simulator mode? | |
| 293 bra comp_air_pressure ; no | |
| 294 | |
| 295 comp_air_pressure0: | |
|
398
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296 movlw LOW d'1000' ; yes, so simulate 1bar surface pressure |
| 0 | 297 movwf last_surfpressure+0 |
| 298 movlw HIGH d'1000' | |
| 299 movwf last_surfpressure+1 | |
| 300 | |
| 301 comp_air_pressure: | |
| 302 movf last_surfpressure+0,W ; compensate airpressure | |
| 303 subwf amb_pressure+0,W | |
| 238 | 304 movwf rel_pressure+0 ; rel_pressure stores depth! |
| 0 | 305 |
| 306 movf last_surfpressure+1,W | |
| 307 subwfb amb_pressure+1,W | |
| 308 movwf rel_pressure+1 | |
| 238 | 309 btfss STATUS,N ; result is below zero? |
| 310 return | |
| 311 clrf rel_pressure+0 ; Yes, do not display negative depths | |
| 312 clrf rel_pressure+1 ; e.g. when surface air pressure dropped during the dive | |
| 0 | 313 return |
| 238 | 314 |
| 315 sensor_int_state1_plus_restart: | |
|
340
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316 clrf amb_pressure_avg+0 ; pressure average registers |
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317 clrf amb_pressure_avg+1 |
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318 clrf temperature_avg+0 |
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319 clrf temperature_avg+1 |
| 238 | 320 |
| 321 sensor_int_state1: | |
| 322 call get_temperature_value ; State 1: Get temperature | |
| 323 call get_pressure_start ; and start pressure integration. | |
| 324 return ; Done. | |
| 325 | |
| 326 sensor_int_state2: | |
| 327 call get_pressure_value ; State2: Get pressure (51us) | |
| 328 call get_temperature_start ; and start temperature integration (73,5us) | |
|
340
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329 goto calculate_compensation ; calculate temperature compensated pressure (233us) |
| 238 | 330 |
|
340
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331 ;============================================================================= |
| 0 | 332 |
| 333 RTCisr: | |
| 334 clrf timer1int_counter1 ; counts to 16 (one second / 62.5ms) | |
| 335 bsf onesecupdate ; we have a new second! | |
| 336 | |
| 337 bcf STATUS,Z ; are we in dive mode? | |
| 338 btfss divemode | |
| 238 | 339 bra RTCisr2 ; No, must be surface or sleepmode |
| 0 | 340 |
| 341 incf samplesecs,F ; CF20 diving seconds done | |
| 342 decf samplesecs_value,W ; holds CF20 value (minus 1 into WREG) | |
| 343 cpfsgt samplesecs | |
| 238 | 344 bra RTCisr1 ; no |
| 0 | 345 |
| 346 clrf samplesecs ; clear counter... | |
| 347 bsf store_sample ; ...and set bit for profile storage | |
| 238 | 348 |
| 0 | 349 RTCisr1: |
| 350 ; Increase re-setable average depth divetime counter | |
| 111 | 351 incf average_divesecs+0,F ; increase stopwatch registers |
| 0 | 352 btfsc STATUS,Z |
|
357
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353 incf average_divesecs+1,F ; increase stopwatch registers |
|
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354 ; Increase total divetime (Regardless of CF01) |
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355 incf total_divetime_seconds+0,F ; increase stopwatch registers |
|
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356 btfsc STATUS,Z |
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357 incf total_divetime_seconds+1,F ; increase stopwatch registers |
|
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358 |
| 0 | 359 btfss divemode2 ; displayed divetime is running? |
| 360 bra RTCisr2 ; No (e.g. too shallow) | |
| 361 | |
|
357
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362 ; increase divetime registers (Displayed dive time) |
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363 incf divesecs,F |
| 0 | 364 movlw d'59' |
| 365 cpfsgt divesecs | |
| 366 bra RTCisr1a | |
| 238 | 367 |
| 0 | 368 clrf divesecs |
| 369 bsf realdive ; this bit is always set (again) if the dive is longer then one minute | |
| 370 | |
| 371 incf divemins+0,F ; increase divemins | |
| 372 btfsc STATUS,Z | |
| 373 incf divemins+1,F ; and now do the realtime clock routine anyway | |
| 374 | |
| 375 RTCisr1a: | |
| 376 btfss FLAG_apnoe_mode ; Are we in Apnoe mode? | |
| 377 bra RTCisr2 ; No, skip the following | |
| 378 | |
| 379 incf apnoe_secs,F ; increase descent registers | |
| 380 movlw d'59' | |
| 381 cpfsgt apnoe_secs | |
| 382 bra RTCisr2 | |
| 383 clrf apnoe_secs | |
| 384 | |
| 385 incf apnoe_mins,F ; increase descent mins | |
| 386 ; Now, do the RTC routine.... | |
| 387 RTCisr2: | |
| 388 incf secs,F ; adjusts seconds, minutes, hours, day, month and year. Checks for a leap year and works until 2099! | |
| 356 | 389 movlw d'60' |
| 359 | 390 cpfseq secs ; Secs == 60 ? |
| 391 return ; NO : done. | |
| 392 clrf secs ; YES: increment minutes instead... | |
| 0 | 393 bsf oneminupdate |
|
497
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394 |
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395 btfss divemode ; In Divemode? |
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396 rcall check_nofly_desat_time ; No, so reduce NoFly and Desat and increase interval |
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397 |
| 0 | 398 incf mins,F |
| 399 movlw d'59' | |
| 400 cpfsgt mins | |
| 401 return | |
| 402 clrf mins | |
| 403 incf hours,F | |
| 404 movlw d'23' | |
| 405 cpfsgt hours | |
| 406 return | |
| 407 clrf hours | |
| 13 | 408 incf day,F |
| 392 | 409 movff time_correction_value,secs ; Correct too slow clock |
| 13 | 410 |
| 0 | 411 check_date: |
| 412 movff month,isr_divB ; new month? | |
| 413 dcfsnz isr_divB,F | |
| 414 movlw .31 | |
| 415 dcfsnz isr_divB,F | |
| 416 movlw .28 | |
| 417 dcfsnz isr_divB,F | |
| 418 movlw .31 | |
| 419 dcfsnz isr_divB,F | |
| 420 movlw .30 | |
| 421 dcfsnz isr_divB,F | |
| 422 movlw .31 | |
| 423 dcfsnz isr_divB,F | |
| 424 movlw .30 | |
| 425 dcfsnz isr_divB,F | |
| 426 movlw .31 | |
| 427 dcfsnz isr_divB,F | |
| 428 movlw .31 | |
| 429 dcfsnz isr_divB,F | |
| 430 movlw .30 | |
| 431 dcfsnz isr_divB,F | |
| 432 movlw .31 | |
| 433 dcfsnz isr_divB,F | |
| 434 movlw .30 | |
| 435 dcfsnz isr_divB,F | |
| 436 movlw .31 | |
| 437 cpfsgt day,1 | |
| 438 return | |
| 439 movlw .1 | |
| 440 movwf day | |
| 441 incf month,F | |
| 442 movlw .12 | |
| 443 cpfsgt month,1 | |
| 444 return | |
| 445 movlw .1 | |
| 446 movwf month | |
| 447 incf year,F | |
|
497
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448 return |
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449 |
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450 check_nofly_desat_time: |
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451 bcf nofly_active ; Clear flag |
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452 movf nofly_time+0,W ; Is nofly null ? |
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453 iorwf nofly_time+1,W |
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454 bz check_nofly_desat_time2 ; yes... |
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455 |
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456 bsf nofly_active ; Set flag (again) |
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457 movlw d'1' |
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458 subwf nofly_time+0,F |
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459 movlw d'0' |
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460 subwfb nofly_time+1,F ; reduce by one |
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461 |
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462 check_nofly_desat_time2: |
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463 movff desaturation_time_buffer+0,lo |
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464 movff desaturation_time_buffer+1,hi |
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465 |
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466 movf lo,W ; Is Desat null ? |
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467 iorwf hi,W |
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468 bz check_nofly_desat_time3 ; yes... |
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469 |
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470 movlw d'1' |
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471 subwf lo,F |
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472 movlw d'0' |
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473 subwfb hi,F ; reduce by one... |
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474 |
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475 movff lo,desaturation_time_buffer+0 ; ...and copy back |
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476 movff hi,desaturation_time_buffer+1 |
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477 |
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478 check_nofly_desat_time3: |
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479 ; Now increase interval timer |
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480 movff desaturation_time_buffer+0,lo |
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481 movff desaturation_time_buffer+1,hi |
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482 tstfsz lo ;=0? |
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483 bra calc_surface_interval2 ; No |
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484 tstfsz hi ;=0? |
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485 bra calc_surface_interval2 ; No |
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486 clrf surface_interval+0 |
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487 clrf surface_interval+1 ; Clear surface interval timer |
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488 return ; Done. |
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489 |
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490 calc_surface_interval2: ; Increase surface interval timer |
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491 movlw d'1' |
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492 addwf surface_interval+0,F |
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493 movlw d'0' |
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494 addwfc surface_interval+1,F |
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495 return ; Done |