Mercurial > public > mk2
annotate code_part1/OSTC_code_asm_part1/ms5535.asm @ 157:54cc1346ac15
1.80RC
| author | heinrichsweikamp |
|---|---|
| date | Tue, 18 Jan 2011 07:39:41 +0100 |
| parents | 3e351e25f5d1 |
| children | 8d6aca08f66b |
| rev | line source |
|---|---|
| 0 | 1 ; OSTC - diving computer code |
| 2 ; Copyright (C) 2008 HeinrichsWeikamp GbR | |
| 3 | |
| 4 ; This program is free software: you can redistribute it and/or modify | |
| 5 ; it under the terms of the GNU General Public License as published by | |
| 6 ; the Free Software Foundation, either version 3 of the License, or | |
| 7 ; (at your option) any later version. | |
| 8 | |
| 9 ; This program is distributed in the hope that it will be useful, | |
| 10 ; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 11 ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 12 ; GNU General Public License for more details. | |
| 13 | |
| 14 ; You should have received a copy of the GNU General Public License | |
| 15 ; along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 16 | |
| 17 | |
| 18 ; routines for Intersema MS5535A, MS5541B and MS5541C | |
| 19 ; written by: Matthias Heinrichs, info@heinrichsweikamp.com | |
| 20 ; written: 9/26/05 | |
| 21 ; last updated: 08/08/31 | |
| 22 ; known bugs: | |
| 23 ; ToDo: | |
| 24 | |
| 25 ; with second order temperature compensation | |
| 26 | |
| 27 calculate_compensation: | |
| 28 ; calculate xdT | |
| 29 clrf isr_xA+1 | |
| 30 movlw d'8' | |
| 31 movwf isr_xA+0 | |
| 32 movff C5+0,isr_xB+0 | |
| 33 movff C5+1,isr_xB+1 | |
| 34 call isr_mult16x16 ;isr_xA*isr_xB=isr_xC | |
| 35 movlw LOW d'10000' | |
| 36 addwf isr_xC+0, f | |
| 37 movlw HIGH d'10000' | |
| 38 addwfc isr_xC+1, f ;isr_xC= 8*C5 + 10000 | |
| 39 movff D2+0,isr_sub_a+0 | |
| 40 movff D2+1,isr_sub_a+1 | |
| 41 movff isr_xC+0,isr_sub_b+0 | |
| 42 movff isr_xC+1,isr_sub_b+1 | |
| 43 call isr_sub16 ; isr_sub_c = isr_sub_a - isr_sub_b | |
| 44 movff isr_sub_c+0,xdT+0 | |
| 45 movff isr_sub_c+1,xdT+1 | |
| 46 | |
| 47 ; Second order temperature calculation | |
| 48 btfsc neg_flag_isr | |
| 49 bra dTzero_yes | |
| 50 ; dT>0 | |
| 51 bcf neg_flag_xdT | |
| 52 movff xdT+0,isr_xA+0 | |
| 53 movff xdT+1,isr_xA+1 | |
| 54 movff xdT+0,isr_xB+0 | |
| 55 movff xdT+1,isr_xB+1 | |
| 56 call isr_mult16x16 ;isr_xA*isr_xB=isr_xC | |
| 57 movlw d'17' ; 2^17=(128*128)*8 | |
| 58 movwf isr_divB | |
| 59 call isr_div32 ; isr_xC=isr_xC(32Bit)/2^isr_divB (isr_divB: 8Bit only!) | |
| 60 movff xdT+0,isr_sub_a+0 | |
| 61 movff xdT+1,isr_sub_a+1 | |
| 62 movff isr_xC+0,isr_sub_b+0 | |
| 63 movff isr_xC+1,isr_sub_b+1 | |
| 64 call isr_sub16 ; isr_sub_c = isr_sub_a - isr_sub_b | |
| 65 movff isr_sub_c+0,xdT2+0 | |
| 66 movff isr_sub_c+1,xdT2+1 | |
| 67 bra OFF_calc ; Done | |
| 68 | |
| 69 dTzero_yes: | |
| 70 ; dT<0 | |
| 71 bsf neg_flag_xdT | |
| 72 movff xdT+0,isr_xA+0 | |
| 73 movff xdT+1,isr_xA+1 | |
| 74 movff xdT+0,isr_xB+0 | |
| 75 movff xdT+1,isr_xB+1 | |
| 76 call isr_mult16x16 ;isr_xA*isr_xB=isr_xC | |
| 77 movlw d'15' ; 2^15=(128*128)*2 | |
| 78 movwf isr_divB | |
| 79 call isr_div32 ; isr_xC=isr_xC(32Bit)/2^isr_divB (isr_divB: 8Bit only!) | |
| 80 | |
| 81 movf xdT+0,W | |
| 82 addwf isr_xC+0,F | |
| 83 movf xdT+1,W | |
| 84 addwfc isr_xC+1,F | |
| 85 movff isr_xC+0,xdT2+0 | |
| 86 movff isr_xC+1,xdT2+1 | |
| 87 | |
| 88 OFF_calc: | |
| 89 ; calculate OFF | |
| 90 movff C4+0,isr_sub_a | |
| 91 movff C4+1,isr_sub_a+1 | |
| 92 movlw d'250' | |
| 93 movwf isr_sub_b | |
| 94 clrf isr_sub_b+1 | |
| 95 call isr_sub16 ; (C4-250) - Sets neg_flag_isr! | |
| 96 movff isr_sub_c,isr_xA | |
| 97 movff isr_sub_c+1,isr_xA+1 | |
| 98 movff xdT+0,isr_xB | |
| 99 movff xdT+0+1,isr_xB+1 | |
| 100 call isr_mult16x16 ; (C4-250)*dT | |
| 101 movff isr_xC+0,isr_divA | |
| 102 movff isr_xC+1,isr_divA+1 | |
| 103 movlw d'12' | |
| 104 movwf isr_divB | |
| 105 call isr_div16 ; [(C4-250)*dT]/2^12 | |
| 106 movff isr_divA+0,isr_xC+0 | |
| 107 movff isr_divA+1,isr_xC+1 ; isr_xC= {[(C4-250)*dT]/2^12} | |
| 108 btfss neg_flag_isr ; neg_flag_isr=1? | |
| 109 bra OFF_calc2 ; Yes, do C2 - isr_xC | |
| 110 ; no, so do C2 + isr_xC | |
| 111 movf C2+0,W | |
| 112 addwf isr_xC+0, f | |
| 113 movf C2+1,W | |
| 114 addwfc isr_xC+1, f ; isr_xC= C2 + {[(C4-250)*dT/2^12]} | |
| 115 OFF_calc3: | |
| 116 movlw LOW d'10000' | |
| 117 addwf isr_xC+0, f | |
| 118 movlw HIGH d'10000' | |
| 119 addwfc isr_xC+1, f ; isr_xC=[(C4-250)*dT/2^12] + 10000 | |
| 120 movff isr_xC+0,OFF+0 | |
| 121 movff isr_xC+1,OFF+1 | |
| 122 bra calculate_SENS ; Done with OFF | |
| 123 | |
| 124 OFF_calc2: | |
| 125 movff C2+0,isr_sub_a+0 | |
| 126 movff C2+1,isr_sub_a+1 | |
| 127 movff isr_xC+0,isr_sub_b+0 | |
| 128 movff isr_xC+1,isr_sub_b+1 | |
| 129 call isr_sub16 ; isr_sub_c = isr_sub_a - isr_sub_b | |
| 130 ; isr_xC= C2 - {[(C4-250)*dT/2^12]} | |
| 131 movff isr_sub_c+0,isr_xC+0 | |
| 132 movff isr_sub_c+1,isr_xC+1 ; Done with OFF | |
| 133 bra OFF_calc3 | |
| 134 | |
| 135 calculate_SENS: | |
| 136 movff C3+0, C3_temp+0 | |
| 137 movff C3+1, C3_temp+1 | |
| 138 movlw d'200' | |
| 139 addwf C3_temp+0, f | |
| 140 movlw d'0' | |
| 141 addwfc C3_temp+1, f ; C3 no longer valid! | |
| 142 movff C3_temp+0, isr_xA | |
| 143 movff C3_temp+1, isr_xA+1 | |
| 144 movff xdT+0, isr_xB | |
| 145 movff xdT+1, isr_xB+1 | |
| 146 call isr_mult16x16 | |
| 147 movff isr_xC+0,isr_divA | |
| 148 movff isr_xC+1,isr_divA+1 | |
| 149 movlw d'13' | |
| 150 movwf isr_divB | |
| 151 call isr_div16 | |
| 152 movff isr_divA,SENS+0 | |
| 153 movff isr_divA+1,SENS+1 | |
| 154 movff C1+0,isr_divA | |
| 155 movff C1+1,isr_divA+1 | |
| 156 movlw d'1' | |
| 157 movwf isr_divB | |
| 158 call isr_div16 | |
| 159 movf isr_divA,W | |
| 160 addwf SENS+0, f | |
| 161 movf isr_divA+1,W | |
| 162 addwfc SENS+1, f | |
| 163 movlw d'184' | |
| 164 addwf SENS+0, f | |
| 165 movlw d'11' | |
| 166 addwfc SENS+1, f | |
| 167 | |
| 168 ; calculate amb_pressure | |
| 169 movff D1+0,isr_sub_a | |
| 170 movff D1+1,isr_sub_a+1 | |
| 171 movff OFF+0,isr_sub_b | |
| 172 movff OFF+1,isr_sub_b+1 | |
| 173 call isr_sub16 | |
| 174 movff isr_sub_c,isr_xA | |
| 175 movff isr_sub_c+1,isr_xA+1 | |
| 176 movff SENS+0,isr_xB | |
| 177 movff SENS+1,isr_xB+1 | |
| 178 call isr_mult16x16 | |
| 179 movlw d'12' | |
| 180 movwf isr_divB | |
| 181 call isr_div32 | |
| 182 btfsc neg_flag_isr ; invert isr_xC+0 and isr_xC+1 | |
| 183 call isr_invert_xC | |
| 184 movlw LOW d'1000' | |
| 185 addwf isr_xC+0, f | |
| 186 movlw HIGH d'1000' | |
| 187 addwfc isr_xC+1, f | |
| 188 movff isr_xC+0,amb_pressure+0 | |
| 189 movff isr_xC+1,amb_pressure+1 | |
| 190 | |
| 191 btfss simulatormode_active ; are we in simulator mode? | |
| 192 bra calc_pressure_done ; no | |
| 193 | |
| 194 movff sim_pressure+0,amb_pressure+0 ; override readings with simulator values | |
| 195 movff sim_pressure+1,amb_pressure+1 | |
| 196 | |
| 197 calc_pressure_done: | |
| 198 | |
| 199 ; calculate temp | |
| 200 movff C6+0, C3_temp+0 | |
| 201 movff C6+1, C3_temp+1 | |
| 202 movlw d'100' | |
| 203 addwf C3_temp+0, f | |
| 204 movlw d'0' | |
| 205 addwfc C3_temp+1, f | |
| 206 movff C3_temp+0,isr_xA+0 | |
| 207 movff C3_temp+1,isr_xA+1 | |
| 208 movff xdT2+0,isr_xB+0 | |
| 209 movff xdT2+1,isr_xB+1 | |
| 210 call isr_mult16x16 | |
| 211 movlw d'11' | |
| 212 movwf isr_divB | |
| 213 call isr_div32 | |
| 214 bcf neg_temp ; Temperatur positive | |
| 215 | |
| 216 btfsc neg_flag_xdT ; was xdT negative? | |
| 217 bra neg_sub_temp ; yes, 200 - dT*(.... | |
| 218 ; No, 200 + dT*(.... | |
| 219 ; movf temperature_correction,W | |
| 220 ; addlw d'200' | |
| 221 ; btfsc STATUS,C | |
| 222 ; incf isr_xC+1,F | |
| 223 | |
| 224 movlw d'200' | |
| 225 addwf isr_xC+0, f | |
| 226 movlw d'0' | |
| 227 addwfc isr_xC+1, f | |
| 228 movff isr_xC+0,temperature+0 | |
| 229 movff isr_xC+1,temperature+1 | |
| 230 return ; done | |
| 231 | |
| 232 neg_sub_temp: ; 200 - dT*(.... | |
| 233 ; movf temperature_correction,W | |
| 234 ; addlw d'200' | |
| 235 ; btfsc STATUS,C | |
| 236 ; decf isr_xC+1,F | |
| 237 | |
| 238 movlw d'200' | |
| 239 neg_sub_temp3: | |
| 240 movwf isr_sub_a+0 | |
| 241 clrf isr_sub_a+1 | |
| 242 movff isr_xC+0, isr_sub_b+0 | |
| 243 movff isr_xC+1, isr_sub_b+1 | |
| 244 call isr_sub16 ; isr_sub_c = isr_sub_a - isr_sub_b | |
| 245 btfsc neg_flag_isr ; below zero? | |
| 246 bsf neg_temp ; temperature negative! | |
| 247 | |
| 248 movff isr_sub_c+0,temperature+0 | |
| 249 movff isr_sub_c+1,temperature+1 | |
| 250 return ; Fertig mit allem | |
| 251 | |
| 252 | |
| 253 get_pressure_start: | |
| 254 rcall reset_MS5535A | |
| 255 movlw b'10100000' ;+3*high as start and 1+low as stop! | |
| 256 get_pressure_start2: | |
| 257 movwf isr1_temp | |
| 258 movlw d'12' | |
| 259 movwf clock_count | |
| 260 rcall send_data_MS55535A | |
| 261 return | |
| 262 | |
| 263 get_pressure_value: | |
|
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31fa973a70fd
Kludges to emulate inexisting devices when debugged with the MPLAB software SIMulator.
JeanDo
parents:
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changeset
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264 #ifndef TESTING |
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31fa973a70fd
Kludges to emulate inexisting devices when debugged with the MPLAB software SIMulator.
JeanDo
parents:
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265 ; Use register injection instead when in MPLab Sim emulation... |
| 0 | 266 rcall get_2bytes_MS5535A |
| 267 movff dMSB,D1+1 | |
| 268 movff dLSB,D1+0 | |
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31fa973a70fd
Kludges to emulate inexisting devices when debugged with the MPLAB software SIMulator.
JeanDo
parents:
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changeset
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269 #endif |
| 0 | 270 return |
| 271 | |
| 272 get_temperature_start: | |
| 273 rcall reset_MS5535A | |
| 274 movlw b'10010000' ;+3*high as start and 1+low as stop! | |
| 275 bra get_pressure_start2 ; continue in "get_pressure" | |
| 276 | |
| 277 get_temperature_value: | |
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81
31fa973a70fd
Kludges to emulate inexisting devices when debugged with the MPLAB software SIMulator.
JeanDo
parents:
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diff
changeset
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278 #ifndef TESTING |
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31fa973a70fd
Kludges to emulate inexisting devices when debugged with the MPLAB software SIMulator.
JeanDo
parents:
4
diff
changeset
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279 ; Use register injection instead... |
| 0 | 280 rcall get_2bytes_MS5535A |
| 281 movff dMSB,D2+1 | |
| 282 movff dLSB,D2+0 | |
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31fa973a70fd
Kludges to emulate inexisting devices when debugged with the MPLAB software SIMulator.
JeanDo
parents:
4
diff
changeset
|
283 #endif |
| 0 | 284 return |
| 285 | |
| 286 get_calibration_data: | |
| 4 | 287 ; ; read addional temperature correction from internal EEPROM 0x100 |
| 288 ; bsf no_sensor_int ; No sensor interupt! | |
| 289 ; clrf temperature_correction ; clear compensation value | |
| 290 ; movlw LOW 0x100 | |
| 291 ; movwf EEADR | |
| 292 ; movlw HIGH 0x100 | |
| 293 ; movwf EEADRH | |
| 294 ; call read_eeprom | |
| 295 ; clrf EEADRH ; Only 256Bytes used in normal program | |
| 296 ; movlw d'200' ; limit value | |
| 297 ; cpfsgt EEDATA ; EEDATA>200? | |
| 298 ; movff EEDATA, temperature_correction ; No, Store for compensation | |
| 299 ; | |
| 0 | 300 rcall reset_MS5535A |
| 301 movlw d'13' | |
| 302 movwf clock_count | |
| 303 movlw b'01010100' ;+3*high as start and 1+low as stop! | |
| 304 movwf isr1_temp | |
| 305 rcall send_data_MS55535A | |
| 306 rcall get_2bytes_MS5535A | |
| 307 movff dMSB,W1+1 | |
| 308 movff dLSB,W1+0 | |
| 309 | |
| 310 movlw d'13' | |
| 311 movwf clock_count | |
| 312 movlw b'01011000' ;+3*high as start and 1+low as stop! | |
| 313 movwf isr1_temp | |
| 314 rcall send_data_MS55535A | |
| 315 rcall get_2bytes_MS5535A | |
| 316 movff dMSB,W2+1 | |
| 317 movff dLSB,W2+0 | |
| 318 | |
| 319 movlw d'13' | |
| 320 movwf clock_count | |
| 321 movlw b'01100100' ;+3*high as start and 1+low as stop! | |
| 322 movwf isr1_temp | |
| 323 rcall send_data_MS55535A | |
| 324 rcall get_2bytes_MS5535A | |
| 325 movff dMSB,W3+1 | |
| 326 movff dLSB,W3+0 | |
| 327 | |
| 328 movlw d'13' | |
| 329 movwf clock_count | |
| 330 movlw b'01101000' ;+3*high as start and 1+low as stop! | |
| 331 movwf isr1_temp | |
| 332 rcall send_data_MS55535A | |
| 333 rcall get_2bytes_MS5535A | |
| 334 movff dMSB,W4+1 | |
| 335 movff dLSB,W4+0 | |
| 336 | |
| 337 ; calculate C1 (16Bit) | |
| 338 movff W1+1, C1+1 | |
| 339 bcf STATUS,C | |
| 340 rrcf C1+1 | |
| 341 bcf STATUS,C | |
| 342 rrcf C1+1 | |
| 343 bcf STATUS,C | |
| 344 rrcf C1+1 | |
| 345 movff W1+0, C1+0 | |
| 346 bsf STATUS,C | |
| 347 btfss W1+1,0 | |
| 348 bcf STATUS,C | |
| 349 rrcf C1+0 | |
| 350 bsf STATUS,C | |
| 351 btfss W1+1,1 | |
| 352 bcf STATUS,C | |
| 353 rrcf C1+0 | |
| 354 bsf STATUS,C | |
| 355 btfss W1+1,2 | |
| 356 bcf STATUS,C | |
| 357 rrcf C1+0 | |
| 358 | |
| 359 ; calculate C2 (16Bit) | |
| 360 movff W2+0, C2+0 | |
| 361 bsf STATUS,C | |
| 362 btfss W2+1,0 | |
| 363 bcf STATUS,C | |
| 364 rrcf C2+0 | |
| 365 bsf STATUS,C | |
| 366 btfss W2+1,1 | |
| 367 bcf STATUS,C | |
| 368 rrcf C2+0 | |
| 369 bsf STATUS,C | |
| 370 btfss W2+1,2 | |
| 371 bcf STATUS,C | |
| 372 rrcf C2+0 | |
| 373 bsf STATUS,C | |
| 374 btfss W2+1,3 | |
| 375 bcf STATUS,C | |
| 376 rrcf C2+0 | |
| 377 bsf STATUS,C | |
| 378 btfss W2+1,4 | |
| 379 bcf STATUS,C | |
| 380 rrcf C2+0 | |
| 381 bsf STATUS,C | |
| 382 btfss W2+1,5 | |
| 383 bcf STATUS,C | |
| 384 rrcf C2+0 | |
| 385 | |
| 386 movff W2+1, C2+1 | |
| 387 bsf STATUS,C | |
| 388 btfss W1+0,0 | |
| 389 bcf STATUS,C | |
| 390 rrcf C2+1 | |
| 391 bsf STATUS,C | |
| 392 btfss W1+0,1 | |
| 393 bcf STATUS,C | |
| 394 rrcf C2+1 | |
| 395 bsf STATUS,C | |
| 396 btfss W1+0,2 | |
| 397 bcf STATUS,C | |
| 398 rrcf C2+1 | |
| 399 bcf STATUS,C | |
| 400 rrcf C2+1 | |
| 401 bcf STATUS,C | |
| 402 rrcf C2+1 | |
| 403 bcf STATUS,C | |
| 404 rrcf C2+1 | |
| 405 | |
| 406 ; calculate C3 (16Bit) | |
| 407 movff W3+1,C3+0 | |
| 408 bsf STATUS,C | |
| 409 btfss W3+0,7 | |
| 410 bcf STATUS,C | |
| 411 rlcf C3+0 | |
| 412 bsf STATUS,C | |
| 413 btfss W3+0,6 | |
| 414 bcf STATUS,C | |
| 415 rlcf C3+0 | |
| 416 clrf C3+1 | |
| 417 btfsc W3+1,7 | |
| 418 bsf C3+1,1 | |
| 419 btfsc W3+1,6 | |
| 420 bsf C3+1,0 | |
| 421 | |
| 422 ; calculate C4 (16Bit) | |
| 423 movff W4+1,C4+0 | |
| 424 bsf STATUS,C | |
| 425 btfss W4+0,7 | |
| 426 bcf STATUS,C | |
| 427 rlcf C4+0 | |
| 428 clrf C4+1 | |
| 429 btfsc W4+1,7 | |
| 430 bsf C4+1,0 | |
| 431 | |
| 432 ; calculate C5 (16Bit) | |
| 433 movff W3+0,C5+0 | |
| 434 bcf C5+0,6 | |
| 435 btfsc W2+0,0 | |
| 436 bsf C5+0,6 | |
| 437 bcf C5+0,7 | |
| 438 btfsc W2+0,1 | |
| 439 bsf C5+0,7 | |
| 440 clrf C5+1 | |
| 441 btfsc W2+0,2 | |
| 442 bsf C5+1,0 | |
| 443 btfsc W2+0,3 | |
| 444 bsf C5+1,1 | |
| 445 btfsc W2+0,4 | |
| 446 bsf C5+1,2 | |
| 447 btfsc W2+0,5 | |
| 448 bsf C5+1,3 | |
| 449 | |
| 450 ; calculate C6 (16Bit) | |
| 451 clrf C6+1 | |
| 452 movff W4+0,C6+0 | |
| 453 bcf C6+0,7 | |
| 454 | |
| 455 bcf no_sensor_int ; enable sensor interrupts | |
| 456 return | |
| 457 | |
| 458 reset_MS5535A_one: | |
| 459 bsf sensor_SDO | |
| 460 nop | |
| 461 bsf sensor_CLK | |
| 462 nop | |
| 463 nop | |
| 464 nop | |
| 465 nop | |
| 466 nop | |
| 467 nop | |
| 468 bcf sensor_CLK | |
| 469 return | |
| 470 | |
| 471 reset_MS5535A_zero: | |
| 472 bcf sensor_SDO | |
| 473 nop | |
| 474 bsf sensor_CLK | |
| 475 nop | |
| 476 nop | |
| 477 nop | |
| 478 nop | |
| 479 nop | |
| 480 nop | |
| 481 bcf sensor_CLK | |
| 482 return | |
| 483 | |
| 484 reset_MS5535A: | |
| 485 rcall reset_MS5535A_one ;0 | |
| 486 rcall reset_MS5535A_zero | |
| 487 rcall reset_MS5535A_one | |
| 488 rcall reset_MS5535A_zero | |
| 489 rcall reset_MS5535A_one | |
| 490 rcall reset_MS5535A_zero | |
| 491 rcall reset_MS5535A_one | |
| 492 rcall reset_MS5535A_zero | |
| 493 rcall reset_MS5535A_one | |
| 494 rcall reset_MS5535A_zero | |
| 495 rcall reset_MS5535A_one | |
| 496 rcall reset_MS5535A_zero | |
| 497 rcall reset_MS5535A_one | |
| 498 rcall reset_MS5535A_zero | |
| 499 rcall reset_MS5535A_one | |
| 500 rcall reset_MS5535A_zero ;15 | |
| 501 rcall reset_MS5535A_zero | |
| 502 rcall reset_MS5535A_zero | |
| 503 rcall reset_MS5535A_zero | |
| 504 rcall reset_MS5535A_zero | |
| 505 rcall reset_MS5535A_zero ;20 | |
| 506 return | |
| 507 | |
| 508 get_2bytes_MS5535A: | |
| 509 movlw d'8' | |
| 510 movwf clock_count | |
| 511 rcall recieve_loop | |
| 512 movff isr1_temp,dMSB | |
| 513 | |
| 514 movlw d'8' | |
| 515 movwf clock_count | |
| 516 rcall recieve_loop | |
| 517 movff isr1_temp,dLSB | |
| 518 bsf sensor_CLK | |
| 519 nop | |
| 520 nop | |
| 521 nop | |
| 522 nop | |
| 523 nop | |
| 524 nop | |
| 525 bcf sensor_CLK | |
| 526 return | |
| 527 | |
| 528 recieve_loop: | |
| 529 bsf sensor_CLK | |
| 530 nop | |
| 531 nop | |
| 532 nop | |
| 533 nop | |
| 534 nop | |
| 535 nop | |
| 536 bcf sensor_CLK | |
| 537 btfss sensor_SDI ;MSB first | |
| 538 bcf STATUS,C | |
| 539 btfsc sensor_SDI ;MSB first | |
| 540 bsf STATUS,C | |
| 541 rlcf isr1_temp,F | |
| 542 decfsz clock_count,F | |
| 543 bra recieve_loop | |
| 544 return | |
| 545 | |
| 546 | |
| 547 send_data_MS55535A: | |
| 548 ; send three startbits first | |
| 549 bcf sensor_CLK | |
| 550 bsf sensor_SDO | |
| 551 movlw d'3' | |
| 552 subwf clock_count,F ; total bit counter | |
| 553 bsf sensor_CLK | |
| 554 nop | |
| 555 nop | |
| 556 nop | |
| 557 nop | |
| 558 nop | |
| 559 nop | |
| 560 bcf sensor_CLK | |
| 561 nop | |
| 562 nop | |
| 563 nop | |
| 564 nop | |
| 565 nop | |
| 566 nop | |
| 567 bsf sensor_CLK | |
| 568 nop | |
| 569 nop | |
| 570 nop | |
| 571 nop | |
| 572 nop | |
| 573 nop | |
| 574 bcf sensor_CLK | |
| 575 nop | |
| 576 nop | |
| 577 nop | |
| 578 nop | |
| 579 nop | |
| 580 nop | |
| 581 bsf sensor_CLK | |
| 582 nop | |
| 583 nop | |
| 584 nop | |
| 585 nop | |
| 586 nop | |
| 587 nop | |
| 588 bcf sensor_CLK | |
| 589 ; now send 8 bytes from isr_temp1 and fill-up with zeros | |
| 590 datenbits: | |
| 591 btfss isr1_temp,7 ;MSB first | |
| 592 bcf sensor_SDO | |
| 593 btfsc isr1_temp,7 ;MSB first | |
| 594 bsf sensor_SDO | |
| 595 bcf STATUS,C | |
| 596 rlcf isr1_temp | |
| 597 | |
| 598 bsf sensor_CLK | |
| 599 nop | |
| 600 nop | |
| 601 nop | |
| 602 nop | |
| 603 nop | |
| 604 nop | |
| 605 bcf sensor_CLK | |
| 606 | |
| 607 decfsz clock_count,F | |
| 608 bra datenbits | |
| 609 return |