Mercurial > public > hwos_code
annotate src/ms5541.asm @ 631:185ba2f91f59
3.09 beta 1 release
| author | heinrichsweikamp |
|---|---|
| date | Fri, 28 Feb 2020 15:45:07 +0100 |
| parents | 4cd81bdbf15c |
| children | 4050675965ea |
| rev | line source |
|---|---|
| 0 | 1 ;============================================================================= |
| 2 ; | |
| 631 | 3 ; File ms5541.asm combined next generation V3.8.6 |
| 0 | 4 ; |
| 5 ; Sensor subroutines | |
| 6 ; | |
| 7 ; Copyright (c) 2011, JD Gascuel, HeinrichsWeikamp, all right reserved. | |
| 8 ;============================================================================= | |
| 9 ; HISTORY | |
| 10 ; 2011-08-03 : [mH] moving from OSTC code | |
| 11 | |
| 623 | 12 #include "hwos.inc" ; Mandatory header |
| 13 #include "math.inc" ; Math routines | |
| 0 | 14 |
| 623 | 15 |
| 16 ms5541 CODE | |
| 0 | 17 |
| 18 ;============================================================================= | |
| 623 | 19 ; Expose internal variables to ease debug |
| 604 | 20 global D1, D2 |
| 21 global C1, C2, C3, C4, C5, C6 | |
| 623 | 22 global xdT, xdT2, OFF, SENS, pressure_abs_avg, temperature_avg |
| 0 | 23 |
| 24 ;============================================================================= | |
| 623 | 25 |
| 26 global calculate_compensation ; called from ISR and from sleep mode, returns in bank isr_data | |
| 0 | 27 calculate_compensation: |
| 623 | 28 banksel isr_backup ; select bank ISR data |
| 29 | |
| 30 ;---- pressure sensor compensation | |
| 31 | |
| 32 ; xdT = D2 - C5 (s16 range -11.400 .. +12.350) | |
| 33 movf C5+0,W ; get value to be subtracted | |
| 34 subwf D2+0,W ; do the low byte | |
| 604 | 35 movwf xdT+0 |
| 623 | 36 movf C5+1,W ; do the high byte |
| 604 | 37 subwfb D2+1,W |
| 38 movwf xdT+1 | |
| 0 | 39 |
| 623 | 40 ; second order temperature calculation |
| 41 | |
| 42 ; xdT/128 is in range -89..+96, hence signed 8 bit. dT/128 = (2*dT)/256 | |
| 43 rlcf xdT+0,W ; put hit bit in carry | |
| 44 rlcf xdT+1,W ; inject in high byte | |
| 45 movwf isr_xA+0 ; and put result in low byte | |
| 604 | 46 clrf isr_xA+1 |
| 623 | 47 btfsc xdT+1,7 ; dT < 0 ? |
| 48 setf isr_xA+1 ; YES - sign extend to -1 | |
| 49 MOVII isr_xA,isr_xB ; copy A to B | |
| 604 | 50 call isr_signed_mult16x16 ; dT*dT --> xC (32 bits) |
| 0 | 51 |
| 623 | 52 ; dT >= 0: divide by 8, i.e. 3 shifts rights |
| 53 ; dT < 0: divide by 2, i.e. 1 shifts rights | |
| 604 | 54 movlw .3 |
| 623 | 55 btfss xdT+1,7 ; was dT negative ? |
| 604 | 56 movlw .1 |
| 0 | 57 calc_loop_1: |
| 623 | 58 bcf STATUS,C ; dT^2 is positive, so injected zeros |
| 604 | 59 rrcf isr_xC+1,F |
| 60 rrcf isr_xC+0,F | |
| 61 decfsz WREG | |
| 62 bra calc_loop_1 | |
| 0 | 63 |
| 604 | 64 movf isr_xC+0,W ; dT2 = dT - (dT/128)*(dT/128)/(2 ...or... 8) |
| 65 subwf xdT+0,W | |
| 66 movwf xdT2+0 | |
| 67 movf isr_xC+1,W | |
| 68 subwfb xdT+1,W | |
| 69 movwf xdT2+1 | |
| 70 | |
| 623 | 71 ; calculate OFF = C2 + ((C4-250)*dT2)/2^12 + 10000 (range +9.246 .. +18.887) |
| 72 MOVII C4, isr_xA ; C4 - 250 --> A | |
| 73 MOVII xdT2,isr_xB ; dT2 --> B | |
| 604 | 74 call isr_signed_mult16x16 |
| 0 | 75 |
| 623 | 76 movlw .12-.8 ; a 12 bit shift = 1 byte + 4 bits |
| 604 | 77 call isr_shift_C31 |
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78 |
| 623 | 79 movlw LOW(.10000) ; add 10000 |
| 604 | 80 addwf isr_xC+1,F |
| 81 movlw HIGH(.10000) | |
| 82 addwfc isr_xC+2,F | |
| 0 | 83 |
| 623 | 84 movf C2+0,W ; add C2 and store result in OFF |
| 604 | 85 addwf isr_xC+1,W |
| 86 movwf OFF+0 | |
| 0 | 87 movf C2+1,W |
| 604 | 88 addwfc isr_xC+2,W |
| 89 movwf OFF+1 | |
| 90 | |
| 623 | 91 ; calculate SENS = C1/2 + ((C3+200)*dT)/2^13 + 3000 |
| 604 | 92 movlw LOW(.200) ; C3+200 --> A |
| 93 addwf C3+0,W | |
| 94 movwf isr_xA+0 | |
| 95 movlw HIGH(.200) | |
| 96 addwfc C3+1,W | |
| 97 movwf isr_xA+1 | |
| 98 ; B still contains dT2 | |
| 99 call isr_signed_mult16x16 ; A*B --> C | |
| 623 | 100 movlw .13-.8 ; A 13 bit shift = 1 byte + 5 bits |
| 604 | 101 call isr_shift_C31 |
| 0 | 102 |
| 604 | 103 bcf STATUS,C ; SENS = C1 / 2 |
| 104 rrcf C1+1,W | |
| 105 movwf SENS+1 | |
| 106 rrcf C1+0,W | |
| 107 movwf SENS+0 | |
| 108 | |
| 623 | 109 movlw LOW(.3000) ; add 3000 |
| 604 | 110 addwf isr_xC+1,F |
| 111 movlw HIGH(.3000) | |
| 112 addwfc isr_xC+2,F | |
| 0 | 113 |
| 623 | 114 movf isr_xC+1,W ; and sum into SENS |
| 604 | 115 addwf SENS+0,F |
| 116 movf isr_xC+2,W | |
| 623 | 117 addwfc SENS+1,F |
| 0 | 118 |
| 631 | 119 ; calculate absolute pressure = (sens * (d1-off))/2^12 + 1000 (for MS5541C) |
| 120 ; calculate absolute pressure = (sens * (d1-off))/2^11 + 1000 (for MS5541C-30) | |
| 604 | 121 movf OFF+0,W ; d1-off --> a |
| 122 subwf D1+0,W | |
| 123 movwf isr_xA+0 | |
| 124 movf OFF+1,W | |
| 125 subwfb D1+1,W | |
| 126 movwf isr_xA+1 | |
| 0 | 127 |
| 623 | 128 MOVII SENS,isr_xB ; sens --> b |
| 604 | 129 call isr_signed_mult16x16 |
| 630 | 130 movlw .13 |
| 631 | 131 cpfslt C1+1 ; C1 > 3328 ? |
| 132 bra isr_shift_ms5541_30 ; YES - MS5541-30 | |
| 133 movlw .12-.8 ; NO - MS5541: 12 bit shift = 1 byte + 4 bits | |
| 134 bra isr_shift_ms5541_common | |
| 135 isr_shift_ms5541_30: | |
| 136 movlw .11-.8 ; MS5541-30: 11 bit shift = 1 byte + 3 bits | |
| 137 isr_shift_ms5541_common: | |
| 604 | 138 call isr_shift_C31 |
| 623 | 139 movlw LOW .1000 ; add 1000 |
| 604 | 140 addwf isr_xC+1,F |
| 623 | 141 movlw HIGH .1000 |
| 604 | 142 addwfc isr_xC+2,F |
| 0 | 143 |
| 623 | 144 ; add opt_pressure_adjust to result (SIGNED!) |
| 145 movff opt_pressure_adjust,isr_xC+0; get adjustment value (signed) | |
| 146 movf isr_xC+0,F ; excite flags, opt_pressure_adjust = 0 ? | |
| 147 bz calc_compensation_1 ; YES - skip pressure adjustment | |
| 148 btfss isr_xC+0,7 ; NO - opt_pressure_adjust < 0 ? | |
| 149 bra pressure_extra_add ; NO - add offset | |
| 150 ;bra pressure_extra_sub ; YES - subtract offset | |
| 0 | 151 |
| 623 | 152 pressure_extra_sub: |
| 153 comf isr_xC+0,F ; complement opt_pressure_adjust | |
| 154 incf isr_xC+0,F ; ... | |
| 155 movlw .22 ; check for max. of 20 mbar | |
| 156 cpfslt isr_xC+0 ; opt_pressure_adjust < 21 mbar ? | |
| 157 clrf isr_xC+0 ; NO - reset opt_pressure_adjust to zero | |
| 158 movf isr_xC+0,W ; get opt_pressure_adjust to WREG | |
| 159 subwf isr_xC+1,F ; pressure value -= opt_pressure_adjust, low byte | |
| 160 movlw .0 ; pressure value -= opt_pressure_adjust, high byte | |
| 161 subwfb isr_xC+2,F ; ... | |
| 162 bra calc_compensation_1 ; continue with checking for simulator mode | |
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164 pressure_extra_add: |
| 623 | 165 movlw .21 ; check for max. of 20 mbar |
| 166 cpfslt isr_xC+0 ; opt_pressure_adjust < 21 mbar ? | |
| 167 clrf isr_xC+0 ; NO - reset opt_pressure_adjust to zero | |
| 168 movf isr_xC+0,W ; get opt_pressure_adjust to WREG | |
| 169 addwf isr_xC+1,F ; pressure value += opt_pressure_adjust, low byte | |
| 170 movlw .0 ; pressure value += opt_pressure_adjust, high byte | |
| 171 addwfc isr_xC+2,F ; ... | |
| 172 ;bra calc_compensation_1 ; continue with checking for simulator mode | |
| 173 | |
| 174 calc_compensation_1: | |
| 175 bcf sensor_override_active ; clear sensor override active flag by default | |
| 176 btfss sensor_override_request ; sensor override requested? | |
| 177 bra calc_compensation_add_avg ; NO - keep taking absolute pressure from sensor | |
| 178 btfsc quit_simulatormode ; YES - shall quit simulator mode (the fast way)? | |
| 179 bra calc_compensation_sim_quit ; YES - force pressure_rel_sim to zero | |
| 180 ;bra calc_compensation_sim ; NO - calculate pressure_rel_sim from simulated depth | |
| 181 | |
| 182 calc_compensation_sim: ; check if OSTC got submerged | |
| 183 movlw .5 ; coding in high byte for 1280 | |
| 184 cpfsgt isr_xC+2 ; absolute pressure > 1280 mbar, i.e. OSTC submerged? | |
| 185 bra calc_compensation_sim_slave ; NO - slave pressure_rel_sim to target depth | |
| 186 ;bra calc_compensation_sim_quit ; YES - force pressure_rel_sim to zero | |
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187 |
| 623 | 188 calc_compensation_sim_quit: |
| 189 CLRI pressure_rel_sim ; set pressure_rel_sim to zero, this paves a restart into surface/dive mode | |
| 190 bra calc_compensation_sim_com ; continue with common part | |
| 191 | |
| 192 calc_compensation_sim_slave: | |
| 193 movf simulatormode_depth,W ; copy simulated depth to WREG | |
| 194 mullw .100 ; multiply with 100 to turn depth from meters to relative target pressure in mbar | |
| 195 ; check if shall go up | |
| 196 movf pressure_rel_sim+0,W ; get relative pressure, low byte | |
| 197 subwf PRODL,W ; WREG = relative target pressure - pressure_rel_sim (low byte) | |
| 198 movf pressure_rel_sim+1,W ; get relative pressure, high byte | |
| 199 subwfb PRODH,W ; WREG = relative target pressure - pressure_rel_sim (high byte) | |
| 200 btfsc STATUS,N ; result < 0, i.e. pressure_rel_sim > relative target pressure ? | |
| 201 bra calc_compensation_sim_up ; YES - decrease pressure_rel_sim | |
| 202 ; check if shall go down | |
| 203 movf PRODL,W ; get relative target pressure, low byte | |
| 204 subwf pressure_rel_sim+0,W ; WREG = pressure_rel_sim - relative target pressure (low byte) | |
| 205 movf PRODH,W ; get relative target pressure, high byte | |
| 206 subwfb pressure_rel_sim+1,W ; WREG = pressure_rel_sim - relative target pressure (high byte) | |
| 207 btfsc STATUS,N ; result < 0, i.e. relative target pressure > pressure_rel_sim ? | |
| 208 bra calc_compensation_sim_down ; YES - increase pressure_rel_sim | |
| 209 ; both pressures are equal | |
| 210 bra calc_compensation_sim_com ; NO to both - keep pressure_rel_sim as it is | |
| 0 | 211 |
| 623 | 212 calc_compensation_sim_up: |
| 213 movf PRODL,W ; get relative target pressure, low byte | |
| 214 subwf pressure_rel_sim+0,W ; WREG = pressure_rel_sim - relative target pressure (low byte) | |
| 215 movwf PRODL ; PRODL = pressure_rel_sim - relative target pressure (low byte) | |
| 216 movf PRODH,W ; get relative target pressure, high byte | |
| 217 subwfb pressure_rel_sim+1,W ; WREG = pressure_rel_sim - relative target pressure (high byte) | |
| 218 tstfsz WREG ; more than 255 mbar off from target? | |
| 219 bra calc_compensation_sim_up_norm ; YES - go up with normal speed | |
| 220 movlw simulator_ascent_threshold ; NO - get remaining difference for slowing down ascent | |
| 221 cpfslt PRODL ; - remaining difference to target < decrement? | |
| 222 bra calc_compensation_sim_up_norm ; NO - go up with normal speed | |
| 223 ;bra calc_compensation_sim_up_slow ; YES - go up with slow speed | |
| 224 | |
| 225 calc_compensation_sim_up_slow: | |
| 226 DECI pressure_rel_sim ; subtract slow decrement (1 mbar) from pressure_rel_sim | |
| 227 bra calc_compensation_sim_com ; continue with common part | |
| 228 | |
| 229 calc_compensation_sim_up_norm: | |
| 230 SUBLI simulator_ascent_rate,pressure_rel_sim ; subtract normal decrement from pressure_rel_sim | |
| 231 bra calc_compensation_sim_com ; continue with common part | |
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232 |
| 623 | 233 calc_compensation_sim_down: |
| 234 movf pressure_rel_sim+0,W ; get relative pressure, low byte | |
| 235 subwf PRODL,F ; PRODL = relative target pressure - pressure_rel_sim (low byte) | |
| 236 movf pressure_rel_sim+1,W ; get relative pressure, high byte | |
| 237 subwfb PRODH,W ; WREG = relative target pressure - pressure_rel_sim (high byte) | |
| 238 tstfsz WREG ; more than 255 mbar off from target? | |
| 239 bra calc_compensation_sim_down_norm ; YES - go down with normal speed | |
| 240 movlw simulator_descent_threshold ; NO - get remaining difference for slowing down descent | |
| 241 cpfslt PRODL ; - remaining difference to target < increment? | |
| 242 bra calc_compensation_sim_down_norm ; NO - go down with normal speed | |
| 243 ;bra calc_compensation_sim_down_slow ; YES - go down with slow speed | |
| 244 | |
| 245 calc_compensation_sim_down_slow: | |
| 246 INCI pressure_rel_sim ; add slow increment (1 mbar) to pressure_rel_sim | |
| 247 bra calc_compensation_sim_com ; continue with common part | |
| 604 | 248 |
| 623 | 249 calc_compensation_sim_down_norm: |
| 250 ADDLI simulator_descent_rate,pressure_rel_sim ; add normal increment to pressure_rel_sim | |
| 251 ;bra calc_compensation_sim_com ; continue with common part | |
| 252 | |
| 253 calc_compensation_sim_com: | |
| 254 movf pressure_surf+0,W ; copy surface pressure to WREG, low byte | |
| 255 addwf pressure_rel_sim+0,W ; add surface pressure to relative pressure to gain simulated absolute pressure, low byte | |
| 256 movwf isr_xC+1 ; override sensor pressure with simulated pressure, low byte | |
| 257 movf pressure_surf+1,W ; copy surface pressure to WREG, high byte | |
| 258 addwfc pressure_rel_sim+1,W ; add surface pressure to relative pressure to gain simulated absolute pressure, high byte | |
| 259 movwf isr_xC+2 ; override sensor pressure with simulated pressure, high byte | |
| 260 bsf sensor_override_active ; confirm sensor override is active | |
| 261 | |
| 262 calc_compensation_add_avg: | |
| 263 ; add current absolute pressure to averaging buffer | |
| 264 movf isr_xC+1,W ; copy current absolute pressure to WREG, low byte | |
| 265 addwf pressure_abs_avg+0,F ; pressure_abs_avg += current pressure, low byte | |
| 266 movf isr_xC+2,W ; copy current absolute pressure to WREG, high byte | |
| 267 addwfc pressure_abs_avg+1,F ; pressure_abs_avg += current pressure, high byte | |
| 268 | |
| 269 ;---- temperature sensor compensation | |
| 0 | 270 |
| 604 | 271 ; calculate temp = 200 + dT*(C6+100)/2^11 |
| 272 movlw LOW(.100) ; C6 + 100 --> A | |
| 273 addwf C6+0,W | |
| 274 movwf isr_xA+0 | |
| 275 movlw HIGH(.100) | |
| 276 addwfc C6+1,W | |
| 277 movwf isr_xA+1 | |
| 0 | 278 |
| 623 | 279 MOVII xdT2,isr_xB ; dT2 --> B |
| 604 | 280 call isr_signed_mult16x16 ; A*B |
| 623 | 281 movlw .11-.8 ; a 12 bit shift = 1 byte + 3 bits |
| 604 | 282 call isr_shift_C31 |
| 0 | 283 |
| 623 | 284 movlw LOW(.200) ; add 200 |
| 604 | 285 addwf isr_xC+1,F |
| 286 movlw HIGH(.200) | |
| 287 addwfc isr_xC+2,F | |
| 0 | 288 |
| 623 | 289 ; add opt_temperature_adjust to result (SIGNED!) |
| 604 | 290 movff opt_temperature_adjust,isr_xC+0 |
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291 |
| 604 | 292 btfss isr_xC+0,7 ; < 0 ? |
| 623 | 293 bra temperature_extra_add ; NO |
| 294 comf isr_xC+0,F ; YES | |
| 604 | 295 incf isr_xC+0,F |
| 623 | 296 movlw .22 ; check for max. of 2.0°C |
| 604 | 297 cpfslt isr_xC+0 |
| 298 clrf isr_xC+0 | |
| 623 | 299 movf isr_xC+0,W ; subtract |
| 604 | 300 subwf isr_xC+1,F |
| 301 movlw .0 | |
| 302 subwfb isr_xC+2,F | |
| 303 bra temperature_extra_common | |
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305 temperature_extra_add: |
| 623 | 306 movlw .21 ; check for max. of 2.0°C |
| 604 | 307 cpfslt isr_xC+0 |
| 308 clrf isr_xC+0 | |
| 623 | 309 movf isr_xC+0,W ; add |
| 604 | 310 addwf isr_xC+1,F |
| 311 movlw .0 | |
| 312 addwfc isr_xC+2,F | |
| 623 | 313 |
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314 temperature_extra_common: |
| 604 | 315 movf isr_xC+1,W |
| 316 addwf temperature_avg+0,F | |
| 317 movf isr_xC+2,W | |
| 318 addwfc temperature_avg+1,F | |
| 0 | 319 |
| 623 | 320 return ; done |
| 0 | 321 |
| 322 ;============================================================================= | |
| 623 | 323 |
| 324 global get_pressure_start ; called from ISR and sleep mode, needs to be called bank isr_backup | |
| 0 | 325 get_pressure_start: |
| 326 rcall reset_MS5541 | |
| 623 | 327 movlw b'10100000' ; +3*high as start and 1+low as stop |
| 328 movwf dbuffer | |
| 0 | 329 movlw d'12' |
| 330 rcall send_data_MS5541 | |
| 331 return | |
| 332 | |
| 623 | 333 global get_pressure_value ; called from ISR and sleep mode, needs to be called bank isr_backup |
| 0 | 334 get_pressure_value: |
| 623 | 335 btfsc MS5541_miso ; conversion done? |
| 336 return ; NO - done | |
| 0 | 337 rcall get_2bytes_MS5541 |
| 623 | 338 movff dMSB,D1+1 |
| 0 | 339 movff dLSB,D1+0 |
| 340 return | |
| 341 | |
| 342 ;============================================================================= | |
| 623 | 343 |
| 344 global get_temperature_start ; called from ISR and sleep mode, needs to be called in bank isr_backup | |
| 0 | 345 get_temperature_start: |
| 346 rcall reset_MS5541 | |
| 623 | 347 movlw b'10010000' ; +3*high as start and 1+low as stop |
| 348 movwf dbuffer | |
| 349 movlw d'12' | |
| 350 rcall send_data_MS5541 | |
| 351 return | |
| 0 | 352 |
| 623 | 353 |
| 354 global get_temperature_value ; called from ISR and sleep mode, needs to be called in bank isr_backup | |
| 0 | 355 get_temperature_value: |
| 623 | 356 btfsc MS5541_miso ; conversion done? |
| 357 return ; NO - done | |
| 0 | 358 rcall get_2bytes_MS5541 |
| 359 movff dMSB,D2+1 | |
| 360 movff dLSB,D2+0 | |
| 361 return | |
| 362 | |
| 363 ;============================================================================= | |
| 623 | 364 |
| 365 global get_calibration_data ; called by start, returns in bank common | |
| 0 | 366 get_calibration_data: |
| 623 | 367 banksel isr_backup ; select bank ISR data |
| 368 bsf block_sensor_interrupt ; disable sensor interrupts | |
| 0 | 369 |
| 370 rcall reset_MS5541 | |
| 623 | 371 movlw b'01010100' ; +3*high as start and 1+low as stop |
| 372 movwf dbuffer | |
| 0 | 373 movlw d'13' |
| 374 rcall send_data_MS5541 | |
| 375 rcall get_2bytes_MS5541 | |
| 623 | 376 movff dMSB,ir_s8_buffer+1 |
| 255 | 377 movff dLSB,ir_s8_buffer+0 |
| 0 | 378 |
| 623 | 379 movlw b'01011000' ; +3*high as start and 1+low as stop |
| 380 movwf dbuffer | |
| 0 | 381 movlw d'13' |
| 382 rcall send_data_MS5541 | |
| 383 rcall get_2bytes_MS5541 | |
| 623 | 384 movff dMSB,ir_s8_buffer+3 |
| 255 | 385 movff dLSB,ir_s8_buffer+2 |
| 0 | 386 |
| 623 | 387 movlw b'01100100' ; +3*high as start and 1+low as stop |
| 388 movwf dbuffer | |
| 0 | 389 movlw d'13' |
| 390 rcall send_data_MS5541 | |
| 391 rcall get_2bytes_MS5541 | |
| 623 | 392 movff dMSB,ir_s8_buffer+5 |
| 255 | 393 movff dLSB,ir_s8_buffer+4 |
| 0 | 394 |
| 623 | 395 movlw b'01101000' ; +3*high as start and 1+low as stop |
| 396 movwf dbuffer | |
| 0 | 397 movlw d'13' |
| 398 rcall send_data_MS5541 | |
| 399 rcall get_2bytes_MS5541 | |
| 623 | 400 movff dMSB,ir_s8_buffer+7 |
| 255 | 401 movff dLSB,ir_s8_buffer+6 |
| 0 | 402 |
| 623 | 403 ; calculate C1 (16Bit) |
| 255 | 404 movff ir_s8_buffer+1, C1+1 |
| 0 | 405 bcf STATUS,C |
| 406 rrcf C1+1 | |
| 407 bcf STATUS,C | |
| 408 rrcf C1+1 | |
| 409 bcf STATUS,C | |
| 410 rrcf C1+1 | |
| 255 | 411 movff ir_s8_buffer+0, C1+0 |
| 0 | 412 bsf STATUS,C |
| 255 | 413 btfss ir_s8_buffer+1,0 |
| 0 | 414 bcf STATUS,C |
| 415 rrcf C1+0 | |
| 416 bsf STATUS,C | |
| 255 | 417 btfss ir_s8_buffer+1,1 |
| 0 | 418 bcf STATUS,C |
| 419 rrcf C1+0 | |
| 420 bsf STATUS,C | |
| 255 | 421 btfss ir_s8_buffer+1,2 |
| 0 | 422 bcf STATUS,C |
| 423 rrcf C1+0 | |
| 424 | |
| 623 | 425 ; calculate C2 (16Bit) |
| 255 | 426 movff ir_s8_buffer+2, C2+0 |
| 0 | 427 bsf STATUS,C |
| 255 | 428 btfss ir_s8_buffer+3,0 |
| 0 | 429 bcf STATUS,C |
| 430 rrcf C2+0 | |
| 431 bsf STATUS,C | |
| 255 | 432 btfss ir_s8_buffer+3,1 |
| 0 | 433 bcf STATUS,C |
| 434 rrcf C2+0 | |
| 435 bsf STATUS,C | |
| 255 | 436 btfss ir_s8_buffer+3,2 |
| 0 | 437 bcf STATUS,C |
| 438 rrcf C2+0 | |
| 439 bsf STATUS,C | |
| 255 | 440 btfss ir_s8_buffer+3,3 |
| 0 | 441 bcf STATUS,C |
| 442 rrcf C2+0 | |
| 443 bsf STATUS,C | |
| 255 | 444 btfss ir_s8_buffer+3,4 |
| 0 | 445 bcf STATUS,C |
| 446 rrcf C2+0 | |
| 447 bsf STATUS,C | |
| 255 | 448 btfss ir_s8_buffer+3,5 |
| 0 | 449 bcf STATUS,C |
| 450 rrcf C2+0 | |
| 451 | |
| 255 | 452 movff ir_s8_buffer+3, C2+1 |
| 0 | 453 bsf STATUS,C |
| 255 | 454 btfss ir_s8_buffer+0,0 |
| 0 | 455 bcf STATUS,C |
| 456 rrcf C2+1 | |
| 457 bsf STATUS,C | |
| 255 | 458 btfss ir_s8_buffer+0,1 |
| 0 | 459 bcf STATUS,C |
| 460 rrcf C2+1 | |
| 461 bsf STATUS,C | |
| 255 | 462 btfss ir_s8_buffer+0,2 |
| 0 | 463 bcf STATUS,C |
| 464 rrcf C2+1 | |
| 465 bcf STATUS,C | |
| 466 rrcf C2+1 | |
| 467 bcf STATUS,C | |
| 468 rrcf C2+1 | |
| 469 bcf STATUS,C | |
| 470 rrcf C2+1 | |
| 471 | |
| 623 | 472 ; calculate C3 (16Bit) |
| 255 | 473 movff ir_s8_buffer+5,C3+0 |
| 0 | 474 bsf STATUS,C |
| 255 | 475 btfss ir_s8_buffer+4,7 |
| 0 | 476 bcf STATUS,C |
| 477 rlcf C3+0 | |
| 478 bsf STATUS,C | |
| 255 | 479 btfss ir_s8_buffer+4,6 |
| 0 | 480 bcf STATUS,C |
| 481 rlcf C3+0 | |
| 482 clrf C3+1 | |
| 255 | 483 btfsc ir_s8_buffer+5,7 |
| 0 | 484 bsf C3+1,1 |
| 255 | 485 btfsc ir_s8_buffer+5,6 |
| 0 | 486 bsf C3+1,0 |
| 604 | 487 |
| 623 | 488 ; calculate C4 (16Bit) |
| 255 | 489 movff ir_s8_buffer+7,C4+0 |
| 0 | 490 bsf STATUS,C |
| 255 | 491 btfss ir_s8_buffer+6,7 |
| 0 | 492 bcf STATUS,C |
| 493 rlcf C4+0 | |
| 494 clrf C4+1 | |
| 255 | 495 btfsc ir_s8_buffer+7,7 |
| 0 | 496 bsf C4+1,0 |
| 497 | |
| 623 | 498 ; C4=C4-250 |
| 604 | 499 movlw LOW(-.250) ; C4 - 250 --> C4 |
| 0 | 500 addwf C4+0,W |
| 604 | 501 movwf C4+0 |
| 502 movlw -1 ; HIGH(- .250) is not understood... | |
| 503 addwfc C4+1,W | |
| 504 movwf C4+1 | |
| 505 | |
| 623 | 506 ; calculate C5 (16Bit) |
| 255 | 507 movff ir_s8_buffer+4,C5+0 |
| 0 | 508 bcf C5+0,6 |
| 255 | 509 btfsc ir_s8_buffer+2,0 |
| 0 | 510 bsf C5+0,6 |
| 511 bcf C5+0,7 | |
| 255 | 512 btfsc ir_s8_buffer+2,1 |
| 0 | 513 bsf C5+0,7 |
| 514 clrf C5+1 | |
| 255 | 515 btfsc ir_s8_buffer+2,2 |
| 0 | 516 bsf C5+1,0 |
| 255 | 517 btfsc ir_s8_buffer+2,3 |
| 0 | 518 bsf C5+1,1 |
| 255 | 519 btfsc ir_s8_buffer+2,4 |
| 0 | 520 bsf C5+1,2 |
| 255 | 521 btfsc ir_s8_buffer+2,5 |
| 0 | 522 bsf C5+1,3 |
| 523 | |
| 604 | 524 ; calculate C5 = UT1 |
| 525 ; C5 = 8*C5 + 10000 (u16 range 10.000 .. +42.760) | |
| 0 | 526 clrf isr_xA+1 |
| 527 movlw d'8' | |
| 528 movwf isr_xA+0 | |
| 623 | 529 MOVII C5,isr_xB |
| 530 call isr_unsigned_mult16x16 ; isr_xA*isr_xB=isr_xC | |
| 531 MOVII isr_xC,C5 | |
| 604 | 532 movlw LOW d'10000' |
| 533 addwf C5+0,F | |
| 534 movlw HIGH d'10000' | |
| 623 | 535 addwfc C5+1,F ; = 8*C5 + 10000 |
| 0 | 536 |
| 623 | 537 ; calculate C6 (16Bit) |
| 0 | 538 clrf C6+1 |
| 255 | 539 movff ir_s8_buffer+6,C6+0 |
| 0 | 540 bcf C6+0,7 |
| 541 | |
| 623 | 542 clrf sensor_state_counter ; reset state counter |
| 543 bcf block_sensor_interrupt ; re-enable sensor interrupts | |
| 544 banksel common ; back to bank common | |
| 545 return ; done | |
| 0 | 546 |
| 547 ;============================================================================= | |
| 548 reset_MS5541_one: | |
| 549 bsf MS5541_mosi | |
| 623 | 550 bra send_clk_pulse ; send one high-low sequence on MS5541_clk and return |
| 0 | 551 |
| 552 reset_MS5541_zero: | |
| 553 bcf MS5541_mosi | |
| 623 | 554 bra send_clk_pulse ; send one high-low sequence on MS5541_clk and return |
| 0 | 555 |
| 556 reset_MS5541: | |
| 604 | 557 rcall reset_MS5541_one ; 0 |
| 0 | 558 rcall reset_MS5541_zero |
| 559 rcall reset_MS5541_one | |
| 560 rcall reset_MS5541_zero | |
| 561 rcall reset_MS5541_one | |
| 562 rcall reset_MS5541_zero | |
| 563 rcall reset_MS5541_one | |
| 564 rcall reset_MS5541_zero | |
| 565 rcall reset_MS5541_one | |
| 566 rcall reset_MS5541_zero | |
| 567 rcall reset_MS5541_one | |
| 568 rcall reset_MS5541_zero | |
| 569 rcall reset_MS5541_one | |
| 570 rcall reset_MS5541_zero | |
| 571 rcall reset_MS5541_one | |
| 604 | 572 rcall reset_MS5541_zero ; 15 |
| 573 rcall reset_MS5541_zero | |
| 574 rcall reset_MS5541_zero | |
| 575 rcall reset_MS5541_zero | |
| 576 rcall reset_MS5541_zero | |
| 577 rcall reset_MS5541_zero ; 20 | |
| 0 | 578 return |
| 579 | |
| 623 | 580 |
| 0 | 581 get_2bytes_MS5541: |
| 582 movlw d'8' | |
| 583 movwf clock_count | |
| 584 rcall recieve_loop | |
| 623 | 585 movff dbuffer,dMSB |
| 0 | 586 movlw d'8' |
| 587 movwf clock_count | |
| 588 rcall recieve_loop | |
| 623 | 589 movff dbuffer,dLSB |
| 590 bra send_clk_pulse ; send one high-low sequence on MS5541_clk and return | |
| 0 | 591 |
| 592 recieve_loop: | |
| 623 | 593 rcall send_clk_pulse ; send one high-low sequence on MS5541_clk |
| 594 btfss MS5541_miso ; MSB first | |
| 0 | 595 bcf STATUS,C |
| 623 | 596 btfsc MS5541_miso ; MSB first |
| 0 | 597 bsf STATUS,C |
| 623 | 598 rlcf dbuffer,F |
| 0 | 599 decfsz clock_count,F |
| 600 bra recieve_loop | |
| 601 return | |
| 602 | |
| 603 send_clk_pulse: | |
| 604 bsf MS5541_clk | |
| 605 nop | |
| 606 nop | |
| 607 nop | |
| 608 nop | |
|
29
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|
609 nop |
|
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|
610 nop |
| 0 | 611 bcf MS5541_clk |
| 612 nop | |
| 613 nop | |
|
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|
614 nop |
|
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|
615 nop |
| 604 | 616 return |
| 0 | 617 |
| 623 | 618 |
| 0 | 619 send_data_MS5541: |
| 623 | 620 movwf clock_count ; from WREG |
| 621 ; send three start bits first | |
| 0 | 622 bcf MS5541_clk |
|
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|
623 nop |
|
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|
624 nop |
| 0 | 625 bsf MS5541_mosi |
| 626 movlw d'3' | |
| 604 | 627 subwf clock_count,F ; total bit counter |
| 623 | 628 rcall send_clk_pulse ; send one high-low sequence on MS5541_clk |
| 629 rcall send_clk_pulse ; send one high-low sequence on MS5541_clk | |
| 630 rcall send_clk_pulse ; send one high-low sequence on MS5541_clk | |
| 631 send_data_MS5541_loop: ; now send 8 bits from dbuffer and fill-up with zeros | |
| 0 | 632 bcf MS5541_clk |
|
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|
633 nop |
|
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|
634 nop |
| 623 | 635 btfss dbuffer,7 ; MSB first |
| 0 | 636 bcf MS5541_mosi |
| 623 | 637 btfsc dbuffer,7 ; MSB first |
| 0 | 638 bsf MS5541_mosi |
| 639 bsf MS5541_clk | |
| 640 bcf STATUS,C | |
| 623 | 641 rlcf dbuffer,F |
|
29
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diff
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|
642 nop |
|
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|
643 nop |
| 0 | 644 ; nop |
| 645 ; nop | |
| 646 ; nop | |
| 647 ; nop | |
| 648 ; bcf MS5541_clk | |
| 649 decfsz clock_count,F | |
| 623 | 650 bra send_data_MS5541_loop |
| 0 | 651 bcf MS5541_clk |
| 652 return | |
| 653 | |
| 604 | 654 END |