Mercurial > public > hwos_code
annotate src/ms5541.asm @ 627:bf5fee575701
minor cleanup, reset rx circuity
| author | heinrichsweikamp |
|---|---|
| date | Sun, 30 Jun 2019 23:22:32 +0200 |
| parents | c40025d8e750 |
| children | 4cd81bdbf15c |
| rev | line source |
|---|---|
| 0 | 1 ;============================================================================= |
| 2 ; | |
| 623 | 3 ; File ms5541.asm combined next generation V3.0.3b |
| 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 |
| 623 | 119 ; calculate absolute pressure = (sens * (d1-off))/2^12 + 1000 |
| 604 | 120 movf OFF+0,W ; d1-off --> a |
| 121 subwf D1+0,W | |
| 122 movwf isr_xA+0 | |
| 123 movf OFF+1,W | |
| 124 subwfb D1+1,W | |
| 125 movwf isr_xA+1 | |
| 0 | 126 |
| 623 | 127 MOVII SENS,isr_xB ; sens --> b |
| 604 | 128 call isr_signed_mult16x16 |
| 623 | 129 movlw .12-.8 ; a 12 bit shift = 1 byte + 4 bits |
| 604 | 130 call isr_shift_C31 |
| 0 | 131 |
| 623 | 132 movlw LOW .1000 ; add 1000 |
| 604 | 133 addwf isr_xC+1,F |
| 623 | 134 movlw HIGH .1000 |
| 604 | 135 addwfc isr_xC+2,F |
| 0 | 136 |
| 623 | 137 ; add opt_pressure_adjust to result (SIGNED!) |
| 138 movff opt_pressure_adjust,isr_xC+0; get adjustment value (signed) | |
| 139 movf isr_xC+0,F ; excite flags, opt_pressure_adjust = 0 ? | |
| 140 bz calc_compensation_1 ; YES - skip pressure adjustment | |
| 141 btfss isr_xC+0,7 ; NO - opt_pressure_adjust < 0 ? | |
| 142 bra pressure_extra_add ; NO - add offset | |
| 143 ;bra pressure_extra_sub ; YES - subtract offset | |
| 0 | 144 |
| 623 | 145 pressure_extra_sub: |
| 146 comf isr_xC+0,F ; complement opt_pressure_adjust | |
| 147 incf isr_xC+0,F ; ... | |
| 148 movlw .22 ; check for max. of 20 mbar | |
| 149 cpfslt isr_xC+0 ; opt_pressure_adjust < 21 mbar ? | |
| 150 clrf isr_xC+0 ; NO - reset opt_pressure_adjust to zero | |
| 151 movf isr_xC+0,W ; get opt_pressure_adjust to WREG | |
| 152 subwf isr_xC+1,F ; pressure value -= opt_pressure_adjust, low byte | |
| 153 movlw .0 ; pressure value -= opt_pressure_adjust, high byte | |
| 154 subwfb isr_xC+2,F ; ... | |
| 155 bra calc_compensation_1 ; continue with checking for simulator mode | |
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157 pressure_extra_add: |
| 623 | 158 movlw .21 ; check for max. of 20 mbar |
| 159 cpfslt isr_xC+0 ; opt_pressure_adjust < 21 mbar ? | |
| 160 clrf isr_xC+0 ; NO - reset opt_pressure_adjust to zero | |
| 161 movf isr_xC+0,W ; get opt_pressure_adjust to WREG | |
| 162 addwf isr_xC+1,F ; pressure value += opt_pressure_adjust, low byte | |
| 163 movlw .0 ; pressure value += opt_pressure_adjust, high byte | |
| 164 addwfc isr_xC+2,F ; ... | |
| 165 ;bra calc_compensation_1 ; continue with checking for simulator mode | |
| 166 | |
| 167 calc_compensation_1: | |
| 168 bcf sensor_override_active ; clear sensor override active flag by default | |
| 169 btfss sensor_override_request ; sensor override requested? | |
| 170 bra calc_compensation_add_avg ; NO - keep taking absolute pressure from sensor | |
| 171 btfsc quit_simulatormode ; YES - shall quit simulator mode (the fast way)? | |
| 172 bra calc_compensation_sim_quit ; YES - force pressure_rel_sim to zero | |
| 173 ;bra calc_compensation_sim ; NO - calculate pressure_rel_sim from simulated depth | |
| 174 | |
| 175 calc_compensation_sim: ; check if OSTC got submerged | |
| 176 movlw .5 ; coding in high byte for 1280 | |
| 177 cpfsgt isr_xC+2 ; absolute pressure > 1280 mbar, i.e. OSTC submerged? | |
| 178 bra calc_compensation_sim_slave ; NO - slave pressure_rel_sim to target depth | |
| 179 ;bra calc_compensation_sim_quit ; YES - force pressure_rel_sim to zero | |
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180 |
| 623 | 181 calc_compensation_sim_quit: |
| 182 CLRI pressure_rel_sim ; set pressure_rel_sim to zero, this paves a restart into surface/dive mode | |
| 183 bra calc_compensation_sim_com ; continue with common part | |
| 184 | |
| 185 calc_compensation_sim_slave: | |
| 186 movf simulatormode_depth,W ; copy simulated depth to WREG | |
| 187 mullw .100 ; multiply with 100 to turn depth from meters to relative target pressure in mbar | |
| 188 ; check if shall go up | |
| 189 movf pressure_rel_sim+0,W ; get relative pressure, low byte | |
| 190 subwf PRODL,W ; WREG = relative target pressure - pressure_rel_sim (low byte) | |
| 191 movf pressure_rel_sim+1,W ; get relative pressure, high byte | |
| 192 subwfb PRODH,W ; WREG = relative target pressure - pressure_rel_sim (high byte) | |
| 193 btfsc STATUS,N ; result < 0, i.e. pressure_rel_sim > relative target pressure ? | |
| 194 bra calc_compensation_sim_up ; YES - decrease pressure_rel_sim | |
| 195 ; check if shall go down | |
| 196 movf PRODL,W ; get relative target pressure, low byte | |
| 197 subwf pressure_rel_sim+0,W ; WREG = pressure_rel_sim - relative target pressure (low byte) | |
| 198 movf PRODH,W ; get relative target pressure, high byte | |
| 199 subwfb pressure_rel_sim+1,W ; WREG = pressure_rel_sim - relative target pressure (high byte) | |
| 200 btfsc STATUS,N ; result < 0, i.e. relative target pressure > pressure_rel_sim ? | |
| 201 bra calc_compensation_sim_down ; YES - increase pressure_rel_sim | |
| 202 ; both pressures are equal | |
| 203 bra calc_compensation_sim_com ; NO to both - keep pressure_rel_sim as it is | |
| 0 | 204 |
| 623 | 205 calc_compensation_sim_up: |
| 206 movf PRODL,W ; get relative target pressure, low byte | |
| 207 subwf pressure_rel_sim+0,W ; WREG = pressure_rel_sim - relative target pressure (low byte) | |
| 208 movwf PRODL ; PRODL = pressure_rel_sim - relative target pressure (low byte) | |
| 209 movf PRODH,W ; get relative target pressure, high byte | |
| 210 subwfb pressure_rel_sim+1,W ; WREG = pressure_rel_sim - relative target pressure (high byte) | |
| 211 tstfsz WREG ; more than 255 mbar off from target? | |
| 212 bra calc_compensation_sim_up_norm ; YES - go up with normal speed | |
| 213 movlw simulator_ascent_threshold ; NO - get remaining difference for slowing down ascent | |
| 214 cpfslt PRODL ; - remaining difference to target < decrement? | |
| 215 bra calc_compensation_sim_up_norm ; NO - go up with normal speed | |
| 216 ;bra calc_compensation_sim_up_slow ; YES - go up with slow speed | |
| 217 | |
| 218 calc_compensation_sim_up_slow: | |
| 219 DECI pressure_rel_sim ; subtract slow decrement (1 mbar) from pressure_rel_sim | |
| 220 bra calc_compensation_sim_com ; continue with common part | |
| 221 | |
| 222 calc_compensation_sim_up_norm: | |
| 223 SUBLI simulator_ascent_rate,pressure_rel_sim ; subtract normal decrement from pressure_rel_sim | |
| 224 bra calc_compensation_sim_com ; continue with common part | |
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225 |
| 623 | 226 calc_compensation_sim_down: |
| 227 movf pressure_rel_sim+0,W ; get relative pressure, low byte | |
| 228 subwf PRODL,F ; PRODL = relative target pressure - pressure_rel_sim (low byte) | |
| 229 movf pressure_rel_sim+1,W ; get relative pressure, high byte | |
| 230 subwfb PRODH,W ; WREG = relative target pressure - pressure_rel_sim (high byte) | |
| 231 tstfsz WREG ; more than 255 mbar off from target? | |
| 232 bra calc_compensation_sim_down_norm ; YES - go down with normal speed | |
| 233 movlw simulator_descent_threshold ; NO - get remaining difference for slowing down descent | |
| 234 cpfslt PRODL ; - remaining difference to target < increment? | |
| 235 bra calc_compensation_sim_down_norm ; NO - go down with normal speed | |
| 236 ;bra calc_compensation_sim_down_slow ; YES - go down with slow speed | |
| 237 | |
| 238 calc_compensation_sim_down_slow: | |
| 239 INCI pressure_rel_sim ; add slow increment (1 mbar) to pressure_rel_sim | |
| 240 bra calc_compensation_sim_com ; continue with common part | |
| 604 | 241 |
| 623 | 242 calc_compensation_sim_down_norm: |
| 243 ADDLI simulator_descent_rate,pressure_rel_sim ; add normal increment to pressure_rel_sim | |
| 244 ;bra calc_compensation_sim_com ; continue with common part | |
| 245 | |
| 246 calc_compensation_sim_com: | |
| 247 movf pressure_surf+0,W ; copy surface pressure to WREG, low byte | |
| 248 addwf pressure_rel_sim+0,W ; add surface pressure to relative pressure to gain simulated absolute pressure, low byte | |
| 249 movwf isr_xC+1 ; override sensor pressure with simulated pressure, low byte | |
| 250 movf pressure_surf+1,W ; copy surface pressure to WREG, high byte | |
| 251 addwfc pressure_rel_sim+1,W ; add surface pressure to relative pressure to gain simulated absolute pressure, high byte | |
| 252 movwf isr_xC+2 ; override sensor pressure with simulated pressure, high byte | |
| 253 bsf sensor_override_active ; confirm sensor override is active | |
| 254 | |
| 255 calc_compensation_add_avg: | |
| 256 ; add current absolute pressure to averaging buffer | |
| 257 movf isr_xC+1,W ; copy current absolute pressure to WREG, low byte | |
| 258 addwf pressure_abs_avg+0,F ; pressure_abs_avg += current pressure, low byte | |
| 259 movf isr_xC+2,W ; copy current absolute pressure to WREG, high byte | |
| 260 addwfc pressure_abs_avg+1,F ; pressure_abs_avg += current pressure, high byte | |
| 261 | |
| 262 ;---- temperature sensor compensation | |
| 0 | 263 |
| 604 | 264 ; calculate temp = 200 + dT*(C6+100)/2^11 |
| 265 movlw LOW(.100) ; C6 + 100 --> A | |
| 266 addwf C6+0,W | |
| 267 movwf isr_xA+0 | |
| 268 movlw HIGH(.100) | |
| 269 addwfc C6+1,W | |
| 270 movwf isr_xA+1 | |
| 0 | 271 |
| 623 | 272 MOVII xdT2,isr_xB ; dT2 --> B |
| 604 | 273 call isr_signed_mult16x16 ; A*B |
| 623 | 274 movlw .11-.8 ; a 12 bit shift = 1 byte + 3 bits |
| 604 | 275 call isr_shift_C31 |
| 0 | 276 |
| 623 | 277 movlw LOW(.200) ; add 200 |
| 604 | 278 addwf isr_xC+1,F |
| 279 movlw HIGH(.200) | |
| 280 addwfc isr_xC+2,F | |
| 0 | 281 |
| 623 | 282 ; add opt_temperature_adjust to result (SIGNED!) |
| 604 | 283 movff opt_temperature_adjust,isr_xC+0 |
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284 |
| 604 | 285 btfss isr_xC+0,7 ; < 0 ? |
| 623 | 286 bra temperature_extra_add ; NO |
| 287 comf isr_xC+0,F ; YES | |
| 604 | 288 incf isr_xC+0,F |
| 623 | 289 movlw .22 ; check for max. of 2.0°C |
| 604 | 290 cpfslt isr_xC+0 |
| 291 clrf isr_xC+0 | |
| 623 | 292 movf isr_xC+0,W ; subtract |
| 604 | 293 subwf isr_xC+1,F |
| 294 movlw .0 | |
| 295 subwfb isr_xC+2,F | |
| 296 bra temperature_extra_common | |
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298 temperature_extra_add: |
| 623 | 299 movlw .21 ; check for max. of 2.0°C |
| 604 | 300 cpfslt isr_xC+0 |
| 301 clrf isr_xC+0 | |
| 623 | 302 movf isr_xC+0,W ; add |
| 604 | 303 addwf isr_xC+1,F |
| 304 movlw .0 | |
| 305 addwfc isr_xC+2,F | |
| 623 | 306 |
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307 temperature_extra_common: |
| 604 | 308 movf isr_xC+1,W |
| 309 addwf temperature_avg+0,F | |
| 310 movf isr_xC+2,W | |
| 311 addwfc temperature_avg+1,F | |
| 0 | 312 |
| 623 | 313 return ; done |
| 0 | 314 |
| 315 ;============================================================================= | |
| 623 | 316 |
| 317 global get_pressure_start ; called from ISR and sleep mode, needs to be called bank isr_backup | |
| 0 | 318 get_pressure_start: |
| 319 rcall reset_MS5541 | |
| 623 | 320 movlw b'10100000' ; +3*high as start and 1+low as stop |
| 321 movwf dbuffer | |
| 0 | 322 movlw d'12' |
| 323 rcall send_data_MS5541 | |
| 324 return | |
| 325 | |
| 623 | 326 global get_pressure_value ; called from ISR and sleep mode, needs to be called bank isr_backup |
| 0 | 327 get_pressure_value: |
| 623 | 328 btfsc MS5541_miso ; conversion done? |
| 329 return ; NO - done | |
| 0 | 330 rcall get_2bytes_MS5541 |
| 623 | 331 movff dMSB,D1+1 |
| 0 | 332 movff dLSB,D1+0 |
| 333 return | |
| 334 | |
| 335 ;============================================================================= | |
| 623 | 336 |
| 337 global get_temperature_start ; called from ISR and sleep mode, needs to be called in bank isr_backup | |
| 0 | 338 get_temperature_start: |
| 339 rcall reset_MS5541 | |
| 623 | 340 movlw b'10010000' ; +3*high as start and 1+low as stop |
| 341 movwf dbuffer | |
| 342 movlw d'12' | |
| 343 rcall send_data_MS5541 | |
| 344 return | |
| 0 | 345 |
| 623 | 346 |
| 347 global get_temperature_value ; called from ISR and sleep mode, needs to be called in bank isr_backup | |
| 0 | 348 get_temperature_value: |
| 623 | 349 btfsc MS5541_miso ; conversion done? |
| 350 return ; NO - done | |
| 0 | 351 rcall get_2bytes_MS5541 |
| 352 movff dMSB,D2+1 | |
| 353 movff dLSB,D2+0 | |
| 354 return | |
| 355 | |
| 356 ;============================================================================= | |
| 623 | 357 |
| 358 global get_calibration_data ; called by start, returns in bank common | |
| 0 | 359 get_calibration_data: |
| 623 | 360 banksel isr_backup ; select bank ISR data |
| 361 bsf block_sensor_interrupt ; disable sensor interrupts | |
| 0 | 362 |
| 363 rcall reset_MS5541 | |
| 623 | 364 movlw b'01010100' ; +3*high as start and 1+low as stop |
| 365 movwf dbuffer | |
| 0 | 366 movlw d'13' |
| 367 rcall send_data_MS5541 | |
| 368 rcall get_2bytes_MS5541 | |
| 623 | 369 movff dMSB,ir_s8_buffer+1 |
| 255 | 370 movff dLSB,ir_s8_buffer+0 |
| 0 | 371 |
| 623 | 372 movlw b'01011000' ; +3*high as start and 1+low as stop |
| 373 movwf dbuffer | |
| 0 | 374 movlw d'13' |
| 375 rcall send_data_MS5541 | |
| 376 rcall get_2bytes_MS5541 | |
| 623 | 377 movff dMSB,ir_s8_buffer+3 |
| 255 | 378 movff dLSB,ir_s8_buffer+2 |
| 0 | 379 |
| 623 | 380 movlw b'01100100' ; +3*high as start and 1+low as stop |
| 381 movwf dbuffer | |
| 0 | 382 movlw d'13' |
| 383 rcall send_data_MS5541 | |
| 384 rcall get_2bytes_MS5541 | |
| 623 | 385 movff dMSB,ir_s8_buffer+5 |
| 255 | 386 movff dLSB,ir_s8_buffer+4 |
| 0 | 387 |
| 623 | 388 movlw b'01101000' ; +3*high as start and 1+low as stop |
| 389 movwf dbuffer | |
| 0 | 390 movlw d'13' |
| 391 rcall send_data_MS5541 | |
| 392 rcall get_2bytes_MS5541 | |
| 623 | 393 movff dMSB,ir_s8_buffer+7 |
| 255 | 394 movff dLSB,ir_s8_buffer+6 |
| 0 | 395 |
| 623 | 396 ; calculate C1 (16Bit) |
| 255 | 397 movff ir_s8_buffer+1, C1+1 |
| 0 | 398 bcf STATUS,C |
| 399 rrcf C1+1 | |
| 400 bcf STATUS,C | |
| 401 rrcf C1+1 | |
| 402 bcf STATUS,C | |
| 403 rrcf C1+1 | |
| 255 | 404 movff ir_s8_buffer+0, C1+0 |
| 0 | 405 bsf STATUS,C |
| 255 | 406 btfss ir_s8_buffer+1,0 |
| 0 | 407 bcf STATUS,C |
| 408 rrcf C1+0 | |
| 409 bsf STATUS,C | |
| 255 | 410 btfss ir_s8_buffer+1,1 |
| 0 | 411 bcf STATUS,C |
| 412 rrcf C1+0 | |
| 413 bsf STATUS,C | |
| 255 | 414 btfss ir_s8_buffer+1,2 |
| 0 | 415 bcf STATUS,C |
| 416 rrcf C1+0 | |
| 417 | |
| 623 | 418 ; calculate C2 (16Bit) |
| 255 | 419 movff ir_s8_buffer+2, C2+0 |
| 0 | 420 bsf STATUS,C |
| 255 | 421 btfss ir_s8_buffer+3,0 |
| 0 | 422 bcf STATUS,C |
| 423 rrcf C2+0 | |
| 424 bsf STATUS,C | |
| 255 | 425 btfss ir_s8_buffer+3,1 |
| 0 | 426 bcf STATUS,C |
| 427 rrcf C2+0 | |
| 428 bsf STATUS,C | |
| 255 | 429 btfss ir_s8_buffer+3,2 |
| 0 | 430 bcf STATUS,C |
| 431 rrcf C2+0 | |
| 432 bsf STATUS,C | |
| 255 | 433 btfss ir_s8_buffer+3,3 |
| 0 | 434 bcf STATUS,C |
| 435 rrcf C2+0 | |
| 436 bsf STATUS,C | |
| 255 | 437 btfss ir_s8_buffer+3,4 |
| 0 | 438 bcf STATUS,C |
| 439 rrcf C2+0 | |
| 440 bsf STATUS,C | |
| 255 | 441 btfss ir_s8_buffer+3,5 |
| 0 | 442 bcf STATUS,C |
| 443 rrcf C2+0 | |
| 444 | |
| 255 | 445 movff ir_s8_buffer+3, C2+1 |
| 0 | 446 bsf STATUS,C |
| 255 | 447 btfss ir_s8_buffer+0,0 |
| 0 | 448 bcf STATUS,C |
| 449 rrcf C2+1 | |
| 450 bsf STATUS,C | |
| 255 | 451 btfss ir_s8_buffer+0,1 |
| 0 | 452 bcf STATUS,C |
| 453 rrcf C2+1 | |
| 454 bsf STATUS,C | |
| 255 | 455 btfss ir_s8_buffer+0,2 |
| 0 | 456 bcf STATUS,C |
| 457 rrcf C2+1 | |
| 458 bcf STATUS,C | |
| 459 rrcf C2+1 | |
| 460 bcf STATUS,C | |
| 461 rrcf C2+1 | |
| 462 bcf STATUS,C | |
| 463 rrcf C2+1 | |
| 464 | |
| 623 | 465 ; calculate C3 (16Bit) |
| 255 | 466 movff ir_s8_buffer+5,C3+0 |
| 0 | 467 bsf STATUS,C |
| 255 | 468 btfss ir_s8_buffer+4,7 |
| 0 | 469 bcf STATUS,C |
| 470 rlcf C3+0 | |
| 471 bsf STATUS,C | |
| 255 | 472 btfss ir_s8_buffer+4,6 |
| 0 | 473 bcf STATUS,C |
| 474 rlcf C3+0 | |
| 475 clrf C3+1 | |
| 255 | 476 btfsc ir_s8_buffer+5,7 |
| 0 | 477 bsf C3+1,1 |
| 255 | 478 btfsc ir_s8_buffer+5,6 |
| 0 | 479 bsf C3+1,0 |
| 604 | 480 |
| 623 | 481 ; calculate C4 (16Bit) |
| 255 | 482 movff ir_s8_buffer+7,C4+0 |
| 0 | 483 bsf STATUS,C |
| 255 | 484 btfss ir_s8_buffer+6,7 |
| 0 | 485 bcf STATUS,C |
| 486 rlcf C4+0 | |
| 487 clrf C4+1 | |
| 255 | 488 btfsc ir_s8_buffer+7,7 |
| 0 | 489 bsf C4+1,0 |
| 490 | |
| 623 | 491 ; C4=C4-250 |
| 604 | 492 movlw LOW(-.250) ; C4 - 250 --> C4 |
| 0 | 493 addwf C4+0,W |
| 604 | 494 movwf C4+0 |
| 495 movlw -1 ; HIGH(- .250) is not understood... | |
| 496 addwfc C4+1,W | |
| 497 movwf C4+1 | |
| 498 | |
| 623 | 499 ; calculate C5 (16Bit) |
| 255 | 500 movff ir_s8_buffer+4,C5+0 |
| 0 | 501 bcf C5+0,6 |
| 255 | 502 btfsc ir_s8_buffer+2,0 |
| 0 | 503 bsf C5+0,6 |
| 504 bcf C5+0,7 | |
| 255 | 505 btfsc ir_s8_buffer+2,1 |
| 0 | 506 bsf C5+0,7 |
| 507 clrf C5+1 | |
| 255 | 508 btfsc ir_s8_buffer+2,2 |
| 0 | 509 bsf C5+1,0 |
| 255 | 510 btfsc ir_s8_buffer+2,3 |
| 0 | 511 bsf C5+1,1 |
| 255 | 512 btfsc ir_s8_buffer+2,4 |
| 0 | 513 bsf C5+1,2 |
| 255 | 514 btfsc ir_s8_buffer+2,5 |
| 0 | 515 bsf C5+1,3 |
| 516 | |
| 604 | 517 ; calculate C5 = UT1 |
| 518 ; C5 = 8*C5 + 10000 (u16 range 10.000 .. +42.760) | |
| 0 | 519 clrf isr_xA+1 |
| 520 movlw d'8' | |
| 521 movwf isr_xA+0 | |
| 623 | 522 MOVII C5,isr_xB |
| 523 call isr_unsigned_mult16x16 ; isr_xA*isr_xB=isr_xC | |
| 524 MOVII isr_xC,C5 | |
| 604 | 525 movlw LOW d'10000' |
| 526 addwf C5+0,F | |
| 527 movlw HIGH d'10000' | |
| 623 | 528 addwfc C5+1,F ; = 8*C5 + 10000 |
| 0 | 529 |
| 623 | 530 ; calculate C6 (16Bit) |
| 0 | 531 clrf C6+1 |
| 255 | 532 movff ir_s8_buffer+6,C6+0 |
| 0 | 533 bcf C6+0,7 |
| 534 | |
| 623 | 535 clrf sensor_state_counter ; reset state counter |
| 536 bcf block_sensor_interrupt ; re-enable sensor interrupts | |
| 537 banksel common ; back to bank common | |
| 538 return ; done | |
| 0 | 539 |
| 540 ;============================================================================= | |
| 541 reset_MS5541_one: | |
| 542 bsf MS5541_mosi | |
| 623 | 543 bra send_clk_pulse ; send one high-low sequence on MS5541_clk and return |
| 0 | 544 |
| 545 reset_MS5541_zero: | |
| 546 bcf MS5541_mosi | |
| 623 | 547 bra send_clk_pulse ; send one high-low sequence on MS5541_clk and return |
| 0 | 548 |
| 549 reset_MS5541: | |
| 604 | 550 rcall reset_MS5541_one ; 0 |
| 0 | 551 rcall reset_MS5541_zero |
| 552 rcall reset_MS5541_one | |
| 553 rcall reset_MS5541_zero | |
| 554 rcall reset_MS5541_one | |
| 555 rcall reset_MS5541_zero | |
| 556 rcall reset_MS5541_one | |
| 557 rcall reset_MS5541_zero | |
| 558 rcall reset_MS5541_one | |
| 559 rcall reset_MS5541_zero | |
| 560 rcall reset_MS5541_one | |
| 561 rcall reset_MS5541_zero | |
| 562 rcall reset_MS5541_one | |
| 563 rcall reset_MS5541_zero | |
| 564 rcall reset_MS5541_one | |
| 604 | 565 rcall reset_MS5541_zero ; 15 |
| 566 rcall reset_MS5541_zero | |
| 567 rcall reset_MS5541_zero | |
| 568 rcall reset_MS5541_zero | |
| 569 rcall reset_MS5541_zero | |
| 570 rcall reset_MS5541_zero ; 20 | |
| 0 | 571 return |
| 572 | |
| 623 | 573 |
| 0 | 574 get_2bytes_MS5541: |
| 575 movlw d'8' | |
| 576 movwf clock_count | |
| 577 rcall recieve_loop | |
| 623 | 578 movff dbuffer,dMSB |
| 0 | 579 movlw d'8' |
| 580 movwf clock_count | |
| 581 rcall recieve_loop | |
| 623 | 582 movff dbuffer,dLSB |
| 583 bra send_clk_pulse ; send one high-low sequence on MS5541_clk and return | |
| 0 | 584 |
| 585 recieve_loop: | |
| 623 | 586 rcall send_clk_pulse ; send one high-low sequence on MS5541_clk |
| 587 btfss MS5541_miso ; MSB first | |
| 0 | 588 bcf STATUS,C |
| 623 | 589 btfsc MS5541_miso ; MSB first |
| 0 | 590 bsf STATUS,C |
| 623 | 591 rlcf dbuffer,F |
| 0 | 592 decfsz clock_count,F |
| 593 bra recieve_loop | |
| 594 return | |
| 595 | |
| 596 send_clk_pulse: | |
| 597 bsf MS5541_clk | |
| 598 nop | |
| 599 nop | |
| 600 nop | |
| 601 nop | |
|
29
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|
602 nop |
|
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|
603 nop |
| 0 | 604 bcf MS5541_clk |
| 605 nop | |
| 606 nop | |
|
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|
607 nop |
|
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|
608 nop |
| 604 | 609 return |
| 0 | 610 |
| 623 | 611 |
| 0 | 612 send_data_MS5541: |
| 623 | 613 movwf clock_count ; from WREG |
| 614 ; send three start bits first | |
| 0 | 615 bcf MS5541_clk |
|
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|
616 nop |
|
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|
617 nop |
| 0 | 618 bsf MS5541_mosi |
| 619 movlw d'3' | |
| 604 | 620 subwf clock_count,F ; total bit counter |
| 623 | 621 rcall send_clk_pulse ; send one high-low sequence on MS5541_clk |
| 622 rcall send_clk_pulse ; send one high-low sequence on MS5541_clk | |
| 623 rcall send_clk_pulse ; send one high-low sequence on MS5541_clk | |
| 624 send_data_MS5541_loop: ; now send 8 bits from dbuffer and fill-up with zeros | |
| 0 | 625 bcf MS5541_clk |
|
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|
626 nop |
|
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|
627 nop |
| 623 | 628 btfss dbuffer,7 ; MSB first |
| 0 | 629 bcf MS5541_mosi |
| 623 | 630 btfsc dbuffer,7 ; MSB first |
| 0 | 631 bsf MS5541_mosi |
| 632 bsf MS5541_clk | |
| 633 bcf STATUS,C | |
| 623 | 634 rlcf dbuffer,F |
|
29
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|
635 nop |
|
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|
636 nop |
| 0 | 637 ; nop |
| 638 ; nop | |
| 639 ; nop | |
| 640 ; nop | |
| 641 ; bcf MS5541_clk | |
| 642 decfsz clock_count,F | |
| 623 | 643 bra send_data_MS5541_loop |
| 0 | 644 bcf MS5541_clk |
| 645 return | |
| 646 | |
| 604 | 647 END |