Mercurial > public > hwos_code
annotate src/adc_lightsensor.asm @ 627:bf5fee575701
minor cleanup, reset rx circuity
| author | heinrichsweikamp |
|---|---|
| date | Sun, 30 Jun 2019 23:22:32 +0200 |
| parents | c40025d8e750 |
| children | cd58f7fc86db |
| rev | line source |
|---|---|
| 0 | 1 ;============================================================================= |
| 2 ; | |
| 623 | 3 ; File adc_lightsensor.asm combined next generation V3.03.2 |
| 0 | 4 ; |
| 5 ; | |
| 6 ; Copyright (c) 2011, JD Gascuel, HeinrichsWeikamp, all right reserved. | |
| 7 ;============================================================================= | |
| 8 ; HISTORY | |
| 9 ; 2011-08-08 : [mH] moving from OSTC code | |
| 10 | |
| 275 | 11 #include "hwos.inc" |
| 0 | 12 #include "math.inc" |
| 13 #include "wait.inc" | |
| 14 #include "eeprom_rs232.inc" | |
| 113 | 15 #include "i2c.inc" |
| 0 | 16 |
| 582 | 17 |
| 623 | 18 adc_light CODE |
| 582 | 19 |
| 20 ;============================================================================= | |
| 0 | 21 |
| 623 | 22 wait_adc: ; bank-safe |
| 0 | 23 movwf ADCON0 |
| 582 | 24 nop |
| 25 bsf ADCON0,1 ; start ADC | |
| 0 | 26 wait_adc2: |
| 604 | 27 btfsc ADCON0,1 ; wait... |
| 0 | 28 bra wait_adc2 |
| 582 | 29 return |
| 0 | 30 |
| 31 global get_battery_voltage | |
| 623 | 32 get_battery_voltage: ; start ADC and wait until finished |
| 33 btfss battery_gauge_available ; battery gauge IC available? | |
| 34 bra get_battery_voltage_2 ; NO - OSTC hardware without gauge IC | |
| 35 call lt2942_get_accumulated_charge ; YES - read coulomb counter | |
| 36 call lt2942_get_voltage ; - read battery voltage | |
| 37 call lt2942_get_temperature ; - read battery temperature | |
| 38 tstfsz batt_voltage+1 ; - read voltage < 256 mV ? | |
| 39 bra get_battery_voltage_1 ; NO - proceed | |
| 40 call lt2942_get_accumulated_charge ; YES - re-read coulomb counter | |
| 41 call lt2942_get_voltage ; - re-read battery voltage | |
| 42 call lt2942_get_temperature ; - re-read battery temperature | |
| 43 ;bra get_battery_voltage_1 ; - proceed | |
| 582 | 44 |
| 623 | 45 get_battery_voltage_1: |
| 46 btfsc divemode ; in dive mode? | |
| 47 return ; YES - done | |
| 120 | 48 |
| 623 | 49 bcf cv_active ; clear CV charing status by default |
| 50 bcf cc_active ; clear CC charing status ny default | |
| 51 bcf LEDr ; switch off red LED | |
| 52 bcf TRISJ,2 ; activate Chrg-Out output | |
| 53 bsf CHRG_OUT ; start charger | |
| 54 btfss CHRG_IN ; charging? | |
| 55 bra charge_cc_active ; YES - charging in CC mode | |
| 56 bcf CHRG_OUT ; NO - stop charger | |
| 57 bsf TRISJ,2 ; - set Chrg-Out output to high impedance | |
| 58 WAITMS d'1' ; - wait 1 ms | |
| 59 btfsc CHRG_IN ; - still charging? | |
| 60 return ; NO - done | |
| 61 ;bra charge_cv_active ; YES - charging in CV mode | |
| 120 | 62 |
| 603 | 63 charge_cv_active: |
| 582 | 64 decfsz get_bat_volt_counter,F |
| 65 return | |
| 66 movlw .15 | |
| 623 | 67 cpfsgt batt_voltage+1 ; battery voltage >= 16*256mV (4.096V) ? |
| 604 | 68 bra charge_cc_active ; NO |
| 582 | 69 bsf cc_active |
| 70 bsf cv_active | |
| 604 | 71 bsf LEDr ; indicate charging |
| 72 call lt2942_charge_done ; reset accumulating registers to 0xFFFF | |
| 582 | 73 WAITMS d'10' |
| 604 | 74 bcf LEDr ; indicate charging |
| 582 | 75 bsf get_bat_volt_counter,0 ; =1 |
| 76 return | |
| 120 | 77 |
| 207 | 78 charge_cc_active: |
| 582 | 79 bsf cc_active |
| 604 | 80 bsf LEDr ; indicate charging |
| 582 | 81 bcf CHRG_OUT |
| 623 | 82 bsf TRISJ,2 ; set chrg-Out output to high impedance |
| 603 | 83 movlw .15 |
| 604 | 84 cpfsgt batt_voltage+1 ; battery voltage >= 16*256mV (4.096 V)? |
| 85 bra charge_cc_active2 ; NO | |
| 603 | 86 movlw .81 |
| 604 | 87 cpfslt batt_voltage+0 ; battery voltage >= 80mV (+4096mV from batt_voltage+1)? |
| 88 bra charge_cv_active ; YES | |
| 603 | 89 charge_cc_active2: |
| 582 | 90 movlw .10 |
| 91 movwf get_bat_volt_counter | |
| 92 return | |
| 113 | 93 |
| 623 | 94 get_battery_voltage_2: ; no gauge IC available, use ADC to measure battery voltage |
| 95 ; additional charging disable in software | |
| 96 bsf charge_disable ; set charging-inhibit signal | |
| 97 bcf charge_enable ; activate charging-inhibit signal | |
| 615 | 98 |
| 623 | 99 bsf adc_is_running ; =1: the ADC is in use |
| 100 movlw b'00100000' ; 2.048 Volt Vref+ -> 1 LSB = 500 µV | |
| 0 | 101 movwf ADCON1 |
| 582 | 102 movlw b'00011001' ; power on ADC, select AN6 |
| 103 rcall wait_adc | |
| 0 | 104 |
| 623 | 105 MOVII ADRESL,batt_voltage ; store value |
| 582 | 106 bcf ADCON0,0 ; power off ADC |
| 0 | 107 |
| 604 | 108 ; Multiply with 2.006 to be exact here... |
| 0 | 109 ; bcf STATUS,C |
| 110 ; rlcf xA+0,F | |
| 582 | 111 ; rlcf xA+1,F ; x2 |
| 623 | 112 ; MOVII xA,batt_voltage ; store value |
| 0 | 113 |
| 623 | 114 bcf battery_is_36v ; by default assume it is a 1.5 battery |
| 115 MOVII batt_voltage,sub_b ; load measured battery voltage | |
| 0 | 116 |
| 623 | 117 ; Check if the battery is a 3.6V lithium |
| 118 MOVLI lithium_36v_low,sub_a ; load threshold for 3.6 Volt lithium battery | |
| 119 call cmpU16 ; sub_a - sub_b | |
| 120 btfss neg_flag ; battery voltage > 3.6 V lithium threshold ? | |
| 121 bra get_battery_voltage_9 ; NO - keep assumption of 1.5V battery | |
| 122 bsf battery_is_36v ; YES - set flag | |
| 0 | 123 |
| 582 | 124 ; Check if the battery is near-dead already |
| 623 | 125 MOVLI lithium_36v_empty,sub_a ; load threshold for near-dead lithium battery |
| 126 call cmpU16 ; sub_a - sub_b | |
| 127 btfsc neg_flag ; battery voltage > dead-battery threshold ? | |
| 128 bra get_battery_voltage_3 ; YES - battery is still ok | |
| 129 movlw .128 ; NO - battery is probably dead very soon, set ">=24Ah used" | |
| 130 movff WREG,battery_gauge+5 ; - into battery gauge registers | |
| 0 | 131 |
| 623 | 132 get_battery_voltage_3: ; 3.6V battery gauge mode |
| 133 ; SMOVFF "by hand" as the macro does not work with arguments that have a '+something' with them | |
| 134 bcf trigger_isr_updates ; clear flag, it will be set by the ISR in case it had kicked in | |
| 0 | 135 movff battery_gauge+5,xC+3 |
| 136 movff battery_gauge+4,xC+2 | |
| 137 movff battery_gauge+3,xC+1 | |
| 138 movff battery_gauge+2,xC+0 | |
| 623 | 139 btfsc trigger_isr_updates ; did the ISR kicked in since we cleared the flag? |
| 140 bra get_battery_voltage_3 ; YES - retry copy | |
| 141 | |
| 604 | 142 ; battery_gauge: 6 is nAs |
| 143 ; divide through 65536 | |
| 144 ; divide through battery_capacity:2 | |
| 145 ; result is in percent | |
| 623 | 146 MOVII battery_capacity_internal,xB |
| 604 | 147 call div32x16 ; xC:4 = xC:4 / xB:2 with xA as remainder |
| 0 | 148 movff xC+0,lo |
| 604 | 149 ; limit to 100 |
| 582 | 150 movlw .100 |
| 151 cpfslt lo | |
| 152 movwf lo | |
| 604 | 153 ; lo will be between 0 (full) and 100 (empty) |
| 0 | 154 movf lo,W |
| 155 sublw .100 | |
| 156 movwf lo | |
| 623 | 157 get_battery_voltage_4: |
| 158 movlw .100 ; start with default of 100% | |
| 159 cpfslt lo ; > 100% | |
| 160 movwf lo ; YES - limit to 100% | |
| 604 | 161 ; lo will be between 100 (full) and 0 (empty) |
| 162 ; use 3.6V battery sensing based on 50 mA load | |
| 623 | 163 MOVLI lithium_36v_75,sub_a ; load threshold for > 75% |
| 164 call cmpU16 ; sub_a - sub_b | |
| 165 btfsc neg_flag ; battery voltage above 75% level? | |
| 166 bra get_battery_voltage_5 ; YES | |
| 167 movlw .75 ; NO - set to 75% | |
| 582 | 168 movwf lo |
| 623 | 169 get_battery_voltage_5: |
| 170 ; 50% | |
| 171 MOVLI lithium_36v_50,sub_a ; load threshold for > 50% | |
| 172 call cmpU16 ; sub_a - sub_b | |
| 173 btfsc neg_flag ; battery voltage above 75% level? | |
| 174 bra get_battery_voltage_6 ; YES | |
| 175 movlw .50 ; NO - set to 50% | |
| 582 | 176 movwf lo |
| 623 | 177 get_battery_voltage_6: |
| 582 | 178 ; 25% |
| 623 | 179 MOVLI lithium_36v_25,sub_a ; load threshold for > 25% |
| 180 call cmpU16 ; sub_a - sub_b | |
| 181 btfsc neg_flag ; battery voltage above 25% level? | |
| 182 bra get_battery_voltage_7 ; YES | |
| 183 movlw .25 ; NO - set to 25% | |
| 582 | 184 movwf lo |
| 623 | 185 get_battery_voltage_7: |
| 582 | 186 ; 10% |
| 623 | 187 MOVLI lithium_36v_10,sub_a ; load threshold for > 10% |
| 188 call cmpU16 ; sub_a - sub_b | |
| 189 btfsc neg_flag ; battery voltage above 10% level? | |
| 190 bra get_battery_voltage_8 ; YES | |
| 191 movlw .10 ; NO - set to 10% | |
| 582 | 192 movwf lo |
| 623 | 193 get_battery_voltage_8: |
| 194 movlw .100 ; maximum is 100 (%) | |
| 195 cpfslt lo ; > 100% ? | |
| 196 movwf lo ; YES - limit to 100% | |
| 197 movf batt_percent,W ; get last battery percentage | |
| 198 cpfsgt lo ; current battery % < last battery % ? | |
| 199 movff lo,batt_percent ; YES - take new value (keep batt_percent on the lowest value found) | |
| 200 btfsc battery_is_36v ; using a 3.6 volt battery? | |
| 201 movff lo,batt_percent ; YES - take new value (always use computed value for 3.6V battery) | |
| 202 bcf adc_is_running ; done with ADC | |
| 0 | 203 return |
| 204 | |
| 623 | 205 get_battery_voltage_9: |
| 604 | 206 ; use 1.5V battery voltage mode |
| 623 | 207 ; use approximation (batt_voltage-aa_15v_low)/4 = lo |
| 208 MOVII batt_voltage,sub_a ; load battery voltage | |
| 209 MOVLI aa_15v_low, sub_b ; load offset | |
| 582 | 210 call subU16 ; sub_c = sub_a - sub_b |
| 623 | 211 bcf STATUS,C ; shift right to divide / 2 |
| 582 | 212 rrcf sub_c+1 |
| 623 | 213 rrcf sub_c+0 |
| 214 bcf STATUS,C ; another shift right to divide / 4 | |
| 582 | 215 rrcf sub_c+1 |
| 623 | 216 rrcf sub_c+0 |
| 217 movff sub_c+0,lo ; store result | |
| 218 bra get_battery_voltage_8 ; check limits and return | |
| 0 | 219 |
| 623 | 220 |
| 221 global get_ambient_level ; called from ISR only, in context bank isr_backup | |
| 582 | 222 get_ambient_level: ; starts ADC and waits until finished |
| 623 | 223 btfsc sleepmode ; in sleep mode? |
| 224 return ; YES - done | |
| 225 btfsc adc_is_running ; NO - ADC in use? | |
| 226 return ; YES - return | |
| 227 banksel HW_descriptor ; NO - select bank where hardware descriptor is stored | |
| 228 btfsc ambient_sensor ; - ambient sensor available? | |
| 229 bra get_ambient_level1 ; YES - use sensor | |
| 230 banksel isr_backup ; NO - back to ISR default bank | |
| 231 movff opt_brightness,isr_lo ; - get brightness selection | |
| 232 incf isr_lo,F ; - 0-2 -> 1-3 | |
| 233 movlw ambient_light_max_high_cr ; - default selection to brightest setting | |
| 234 dcfsnz isr_lo,F ; - level 0 (eco) selected? | |
| 235 movlw ambient_light_max_eco ; YES - select eco brightness | |
| 236 dcfsnz isr_lo,F ; - level 1 (medium) selected? | |
| 237 movlw ambient_light_max_medium ; YES - select medium brightness | |
| 238 movwf ambient_light+0 ; - store selection | |
| 239 movwf max_CCPR1L ; - store value for dimming in TMR7 interrupt | |
| 240 return ; - done | |
| 203 | 241 |
| 623 | 242 get_ambient_level1: ; using ambient sensor |
| 243 banksel isr_backup ; back to ISR default bank | |
| 582 | 244 movlw b'00000000' ; Vref+ = Vdd |
| 0 | 245 movwf ADCON1 |
| 582 | 246 movlw b'00011101' ; power on ADC, select AN7 |
| 247 rcall wait_adc | |
| 623 | 248 MOVII ADRESL,ambient_light |
| 582 | 249 bcf ADCON0,0 ; power off ADC |
| 0 | 250 |
| 251 ; ambient_light:2 is between 4096 (direct sunlight) and about 200 (darkness) | |
| 604 | 252 ; first: divide by 16 |
| 0 | 253 bcf STATUS,C |
| 254 rrcf ambient_light+1 | |
| 255 rrcf ambient_light+0 | |
| 256 bcf STATUS,C | |
| 257 rrcf ambient_light+1 | |
| 258 rrcf ambient_light+0 | |
| 259 bcf STATUS,C | |
| 260 rrcf ambient_light+1 | |
| 261 rrcf ambient_light+0 | |
| 262 bcf STATUS,C | |
| 263 rrcf ambient_light+1 | |
| 264 rrcf ambient_light+0 | |
| 604 | 265 ; result: ambient_light:2/16 |
| 266 ; now make sure to have value between ambient_light_low and ambient_light_max | |
| 0 | 267 |
| 582 | 268 movlw .254 |
| 604 | 269 tstfsz ambient_light+1 ; > 255 ? |
| 270 movwf ambient_light+0 ; YES - avoid ADC clipping | |
| 0 | 271 |
| 604 | 272 incfsz ambient_light+0,W ; = 255 ? |
| 273 bra get_ambient_level2 ; NO - continue | |
| 0 | 274 |
| 582 | 275 movlw .254 |
| 276 movwf ambient_light+0 ; avoid ADC clipping | |
| 0 | 277 |
| 278 get_ambient_level2: | |
| 582 | 279 ; movlw .10 |
| 604 | 280 ; subwf ambient_light+0,F ; subtract 10 (ADC Offset) |
| 582 | 281 ; btfsc STATUS,N |
| 282 ; movwf ambient_light+0 ; avoid clipping | |
| 201 | 283 |
| 623 | 284 movff opt_brightness,isr_lo ; get brightness setting |
| 0 | 285 |
| 582 | 286 btfsc RCSTA1,7 ; UART module on? |
| 623 | 287 clrf isr_lo ; YES - set temporary to eco mode |
| 288 incf isr_lo,F ; adjust 0-2 to 1-3 | |
| 0 | 289 |
| 623 | 290 movlw ambient_light_max_high_cr ; cR and 2 hardware brightest setting |
| 0 | 291 |
| 623 | 292 banksel HW_descriptor ; select bank where hardware descriptor and model variant is stored |
| 582 | 293 btfss battery_gauge_available |
| 604 | 294 movlw ambient_light_max_high_15V ; 1.5V battery brightest setting |
| 295 btfsc battery_is_36v ; 3.6V battery in use? | |
| 296 movlw ambient_light_max_high_36V ; YES - 3.6V battery brightest setting | |
| 623 | 297 banksel isr_backup ; back to ISR default bank |
| 0 | 298 |
| 623 | 299 dcfsnz isr_lo,F |
| 300 movlw ambient_light_max_eco ; eco setting | |
| 301 dcfsnz isr_lo,F | |
| 582 | 302 movlw ambient_light_max_medium ; brightest setting |
| 0 | 303 |
| 582 | 304 incf ambient_light+0,F ; +1 |
| 604 | 305 cpfslt ambient_light+0 ; smaller than WREG? |
| 306 movwf ambient_light+0 ; NO - set to max. | |
| 0 | 307 |
| 623 | 308 movff opt_brightness,isr_lo |
| 309 incf isr_lo,F ; adjust 0-2 to 1-3 | |
| 310 movlw ambient_light_min_high ; darkest setting | |
| 311 dcfsnz isr_lo,F | |
| 312 movlw ambient_light_min_eco ; darkest setting | |
| 313 dcfsnz isr_lo,F | |
| 314 movlw ambient_light_min_medium ; darkest setting | |
| 315 dcfsnz isr_lo,F | |
| 582 | 316 movlw ambient_light_min_high ; darkest setting |
| 0 | 317 |
| 604 | 318 cpfsgt ambient_light+0 ; bigger than WREG? |
| 319 movwf ambient_light+0 ; NO - set to min | |
| 582 | 320 |
| 604 | 321 movff ambient_light+0,max_CCPR1L ; store value for dimming in TMR7 interrupt |
| 0 | 322 return |
| 323 | |
| 623 | 324 |
| 325 ;============================================================================= | |
| 326 ; routines for reading analog-attached external sensors | |
| 327 ; | |
| 328 IFDEF _external_sensor | |
| 329 | |
| 330 global get_analog_inputs ; called from outside ISR only | |
| 604 | 331 get_analog_inputs: ; start ADC and wait until finished |
| 623 | 332 bsf adc_is_running ; =1: the ADC is in use |
| 582 | 333 btfsc TFT_PWM |
| 604 | 334 bra get_analog_inputs ; wait for PWM low |
| 335 movlw b'00100000' ; 2.048V Vref+ -> 1 LSB = 500 µV | |
| 113 | 336 movwf ADCON1 |
| 623 | 337 banksel sensor1_mv ; select bank where sensor1_mv is stored |
| 338 ; Sensor 1 | |
| 582 | 339 movlw b'00100001' ; power on ADC, select AN8 |
| 340 rcall wait_adc | |
| 341 bcf STATUS,C | |
| 342 rrcf ADRESH,F ; /2 | |
| 343 rrcf ADRESL,W | |
| 623 | 344 addwf sensor1_mv+0,F ; add to sensor1_mv:2 |
| 582 | 345 movf ADRESH,W |
| 623 | 346 addwfc sensor1_mv+1,F |
| 582 | 347 bcf STATUS,C |
| 623 | 348 rrcf sensor1_mv+1,F ; divide /2 |
| 349 rrcf sensor1_mv+0,F | |
| 582 | 350 movlw HIGH ignore_mv |
| 623 | 351 cpfsgt sensor1_mv+1 ; > ignore_mv ? |
| 352 bra get_analog_inputs1a ; NO | |
| 353 CLRI sensor1_mv ; YES - ignore this reading | |
| 354 get_analog_inputs1a: ; ignore 1.9 mV noise for not-connected inputs | |
| 355 tstfsz sensor1_mv+1 ; > 25.5 mV ? | |
| 604 | 356 bra get_analog_inputs2 ; YES - skip here |
| 582 | 357 movlw .19 |
| 623 | 358 cpfsgt sensor1_mv+0 ; > 1.9 mV ? |
| 359 clrf sensor1_mv+0 ; NO - clear result | |
| 360 | |
|
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361 get_analog_inputs2: |
| 623 | 362 ; Sensor 2 |
| 582 | 363 movlw b'00100101' ; power on ADC, select AN9 |
| 364 rcall wait_adc | |
| 365 bcf STATUS,C | |
| 366 rrcf ADRESH,F ; /2 | |
| 367 rrcf ADRESL,W | |
| 623 | 368 addwf sensor2_mv+0,F ; add to sensor2_mv:2 |
| 582 | 369 movf ADRESH,W |
| 623 | 370 addwfc sensor2_mv+1,F |
| 582 | 371 bcf STATUS,C |
| 623 | 372 rrcf sensor2_mv+1,F ; divide /2 |
| 373 rrcf sensor2_mv+0,F | |
| 582 | 374 movlw HIGH ignore_mv |
| 623 | 375 cpfsgt sensor2_mv+1 ; > ignore_mv ? |
| 376 bra get_analog_inputs2a ; NO | |
| 377 CLRI sensor2_mv ; YES - ignore this reading | |
| 378 get_analog_inputs2a: ; ignore 1.9 mV noise for not-connected inputs | |
| 379 tstfsz sensor2_mv+1 ; > 25.5 mV ? | |
| 604 | 380 bra get_analog_inputs3 ; YES - skip here |
| 582 | 381 movlw .19 |
| 623 | 382 cpfsgt sensor2_mv+0 ; > 1.9 mV ? |
| 383 clrf sensor2_mv+0 ; NO - clear result | |
| 384 | |
|
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385 get_analog_inputs3: |
| 623 | 386 ; Sensor 3 |
| 582 | 387 movlw b'00101001' ; power on ADC, select AN10 |
| 388 rcall wait_adc | |
| 389 bcf STATUS,C | |
| 390 rrcf ADRESH,F ; /2 | |
| 391 rrcf ADRESL,W | |
| 623 | 392 addwf sensor3_mv+0,F ; add to sensor3_mv:2 |
| 582 | 393 movf ADRESH,W |
| 623 | 394 addwfc sensor3_mv+1,F |
| 582 | 395 bcf STATUS,C |
| 623 | 396 rrcf sensor3_mv+1,F ; divide /2 |
| 397 rrcf sensor3_mv+0,F | |
| 582 | 398 movlw HIGH ignore_mv |
| 623 | 399 cpfsgt sensor3_mv+1 ; > ignore_mv ? |
| 400 bra get_analog_inputs3a ; NO | |
| 401 CLRI sensor3_mv ; YES - ignore this reading | |
| 402 get_analog_inputs3a: ; ignore 1.9 mV noise for not-connected inputs | |
| 403 tstfsz sensor3_mv+1 ; > 25.5 mV ? | |
| 604 | 404 bra get_analog_inputs4 ; YES - skip here |
| 582 | 405 movlw .19 |
| 623 | 406 cpfsgt sensor3_mv+0 ; > 1.9 mV ? |
| 407 clrf sensor3_mv+0 ; NO - clear result | |
|
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408 get_analog_inputs4: |
| 623 | 409 banksel common ; back to bank common |
| 582 | 410 bcf ADCON0,0 ; power off ADC |
| 623 | 411 bcf adc_is_running ; done with ADC |
| 582 | 412 return |
| 0 | 413 |
| 623 | 414 ENDIF ; _external_sensor |
| 415 | |
| 416 ;============================================================================= | |
| 417 | |
| 418 global piezo_config ; called from outside ISR only | |
| 419 piezo_config: ; set up sensitivity of heinrichsweikamp piezo buttons (~30ms) | |
| 420 clrf TMR5H ; clear TMR5H first | |
| 421 clrf TMR5L ; clear TMR5L thereafter | |
| 422 bcf PIR5,TMR5IF ; clear timer 5 overrun flag, will take ~ 2 seconds to overrun after reset | |
| 423 bcf switch_right ; clear left-over button events | |
| 424 bcf switch_left ; ... | |
|
416
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425 piezo_config0: |
| 623 | 426 btfsc switch_right ; user still pressing the right button? |
| 427 bra piezo_config ; YES - loop to wait for release | |
| 428 btfsc switch_left ; user still pressing the left button? | |
| 429 bra piezo_config ; YES - loop to wait for release | |
| 582 | 430 |
| 623 | 431 btfss PIR5,TMR5IF ; timeout? |
| 432 bra piezo_config0 ; NO - not yet, loop | |
| 468 | 433 |
| 582 | 434 bcf INTCON,GIE |
| 604 | 435 |
| 582 | 436 movff opt_cR_button_right,WREG ; right button |
| 437 btfsc flip_screen ; 180° rotation ? | |
| 604 | 438 movff opt_cR_button_left,WREG ; YES - left button |
| 582 | 439 rcall piezo_config_tx |
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440 |
| 582 | 441 movff opt_cR_button_left,WREG ; left button |
| 442 btfsc flip_screen ; 180° rotation ? | |
| 604 | 443 movff opt_cR_button_right,WREG ; YES - right button |
| 582 | 444 rcall piezo_config_tx |
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445 |
| 582 | 446 movlw .20 ; reserved |
| 447 rcall piezo_config_tx | |
| 448 movlw .20 ; reserved | |
| 449 rcall piezo_config_tx | |
| 604 | 450 |
| 582 | 451 bsf INTCON,GIE |
| 452 return | |
| 204 | 453 |
| 582 | 454 piezo_config_tx: ; send one byte |
| 455 movwf lo ; store byte | |
| 456 movlw .8 | |
| 457 movwf hi ; bit counter | |
| 458 bcf TX3_PIEZO_CFG ; start bit | |
| 459 rcall piezo_config_wait_bit | |
| 113 | 460 piezo_config_tx_loop: |
| 582 | 461 btfss lo,0 ; LSB first |
| 462 bcf TX3_PIEZO_CFG | |
| 463 btfsc lo,0 ; LSB first | |
| 464 bsf TX3_PIEZO_CFG | |
| 465 rcall piezo_config_wait_bit | |
| 466 rrncf lo,F | |
| 467 decfsz hi,F | |
| 468 bra piezo_config_tx_loop | |
| 469 bsf TX3_PIEZO_CFG ; stop bit | |
| 470 rcall piezo_config_wait_bit | |
| 471 return | |
| 113 | 472 |
| 473 piezo_config_wait_bit: | |
| 623 | 474 setf TMR5H ; set TMR5H first (to 255) |
| 475 movlw .255-.26 ; 26 x 31.5 µs = 819 us | |
| 476 movwf TMR5L ; set TMR5L thereafter | |
| 477 bcf PIR5,TMR5IF ; clear timer 5 overrun flag | |
| 113 | 478 piezo_config_wait_bit3: |
| 623 | 479 btfss PIR5,TMR5IF ; timeout? |
| 480 bra piezo_config_wait_bit3 ; NO - loop | |
| 481 return ; YES - done | |
| 582 | 482 |
| 483 | |
| 623 | 484 global get_analog_switches ; called from ISR and from sleep mode, returns in bank common |
| 604 | 485 get_analog_switches: ; start ADC and wait until finished |
| 623 | 486 banksel HW_variants ; switch to bank where OSTC model variant is stored |
| 604 | 487 btfsc analog_switches ; does the OSTC have analog switches? |
| 623 | 488 bra get_analog_switches_1 ; YES |
| 489 banksel common ; NO - back to bank common | |
| 490 bcf analog_sw1_pressed ; - clear flag for analog switch 1 | |
| 604 | 491 bcf analog_sw2_pressed ; - clear flag for analog switch 2 |
| 492 return ; - done | |
| 623 | 493 |
| 494 get_analog_switches_1: | |
| 495 banksel common ; back to bank common | |
| 496 btfsc adc_is_running ; ADC in use? | |
| 604 | 497 return ; YES - abort |
| 623 | 498 ;bra get_analog_switches_2 ; NO - read switches |
| 499 | |
| 500 get_analog_switches_2: | |
| 582 | 501 movlw b'00001001' ; left justified |
| 502 movwf ADCON2 | |
| 503 ; movlw b'00000000' ; Vref+ = Vdd | |
| 504 clrf ADCON1 | |
| 505 movlw b'00100101' ; power on ADC, select AN9 | |
| 506 rcall wait_adc | |
| 623 | 507 |
| 508 banksel isr_backup ; select bank ISR data | |
| 582 | 509 movff ADRESH,WREG |
| 510 addwf analog_sw2_raw+0 | |
| 511 movlw .0 | |
| 512 addwfc analog_sw2_raw+1 | |
| 513 decfsz analog_counter,F ; continue averaging? | |
| 623 | 514 bra get_analog_switches_2a ; YES |
| 515 bcf STATUS,C ; NO - done, compute average | |
| 582 | 516 rrcf analog_sw2_raw+1 |
| 517 rrcf analog_sw2_raw+0 ; /2 | |
| 518 bcf STATUS,C | |
| 519 rrcf analog_sw2_raw+1 | |
| 520 rrcf analog_sw2_raw+0 ; /4 | |
| 521 bcf STATUS,C | |
| 522 rrcf analog_sw2_raw+1 | |
| 523 rrcf analog_sw2_raw+0 ; /8 | |
| 524 bcf STATUS,C | |
| 525 rrcf analog_sw2_raw+1 | |
| 526 rrcf analog_sw2_raw+0 ; /16 | |
| 527 movff analog_sw2_raw+0,analog_sw2 | |
| 528 clrf analog_sw2_raw+1 | |
| 604 | 529 clrf analog_sw2_raw+0 ; reset average registers |
| 582 | 530 ; movlw .16 |
| 531 ; movwf analog_counter ; only once... | |
| 623 | 532 |
| 533 get_analog_switches_2a: | |
| 534 bcf analog_sw2_pressed ; default to not pressed | |
| 604 | 535 movff opt_cR_button_left,WREG ; 20-100 |
| 582 | 536 bcf STATUS,C |
| 604 | 537 rrcf WREG ; /2 -> 10-50 |
| 582 | 538 bcf STATUS,C |
| 604 | 539 rrcf WREG ; /2 -> 5-25 |
| 540 decf WREG,W ; -1 | |
| 541 decf WREG,W ; -1 | |
| 542 decf WREG,W ; -1 -> 2-22 | |
| 543 btfss button_polarity,1 ; (1= normal, 0=inverted) | |
| 623 | 544 bra get_analog_switches_sw2_inv |
| 582 | 545 addwf analog_sw2,W ; average (~128) |
| 623 | 546 cpfsgt ADRESH ; pressed? |
| 547 bra get_analog_switches_3 ; NO | |
| 548 bra get_analog_switches_sw2_pressed ; YES (left button normal) | |
| 549 | |
| 550 get_analog_switches_sw2_inv: | |
| 582 | 551 subwf analog_sw2,W ; average (~128) |
| 623 | 552 cpfslt ADRESH ; pressed? |
| 553 bra get_analog_switches_3 ; NO | |
| 554 ;bra get_analog_switches_sw2_pressed ; YES (left button inverted) | |
| 555 | |
| 556 get_analog_switches_sw2_pressed: | |
| 557 bsf analog_sw2_pressed ; set left button as pressed | |
| 558 | |
| 559 get_analog_switches_3: | |
| 582 | 560 movlw b'00101001' ; power on ADC, select AN10 |
| 561 rcall wait_adc | |
| 562 movff ADRESH,WREG | |
| 563 addwf analog_sw1_raw+0 | |
| 564 movlw .0 | |
| 565 addwfc analog_sw1_raw+1 | |
| 566 tstfsz analog_counter ; continue averaging? | |
| 623 | 567 bra get_analog_switches_3a ; YES |
| 568 bcf STATUS,C ; NO - done, compute average | |
| 582 | 569 rrcf analog_sw1_raw+1 |
| 570 rrcf analog_sw1_raw+0 ; /2 | |
| 571 bcf STATUS,C | |
| 572 rrcf analog_sw1_raw+1 | |
| 573 rrcf analog_sw1_raw+0 ; /4 | |
| 574 bcf STATUS,C | |
| 575 rrcf analog_sw1_raw+1 | |
| 576 rrcf analog_sw1_raw+0 ; /8 | |
| 577 bcf STATUS,C | |
| 578 rrcf analog_sw1_raw+1 | |
| 579 rrcf analog_sw1_raw+0 ; /16 | |
| 580 movff analog_sw1_raw+0,analog_sw1 | |
| 581 clrf analog_sw1_raw+1 | |
| 604 | 582 clrf analog_sw1_raw+0 ; reset average registers |
| 582 | 583 movlw .16 |
| 584 movwf analog_counter ; only once... | |
| 623 | 585 |
| 586 get_analog_switches_3a: | |
| 587 bcf analog_sw1_pressed ; default to not pressed | |
| 604 | 588 movff opt_cR_button_right,WREG ; 20-100 |
| 582 | 589 bcf STATUS,C |
| 604 | 590 rrcf WREG ; /2 -> 10-50 |
| 582 | 591 bcf STATUS,C |
| 604 | 592 rrcf WREG ; /2 -> 5-25 |
| 593 decf WREG,W ; -1 | |
| 594 decf WREG,W ; -1 | |
| 595 decf WREG,W ; -1 -> 2-22 | |
| 596 btfss button_polarity,0 ; (1= normal, 0=inverted) | |
| 623 | 597 bra get_analog_switches_sw1_inv |
| 582 | 598 addwf analog_sw1,W ; average (~128) |
| 623 | 599 cpfsgt ADRESH ; pressed? |
| 600 bra get_analog_switches_4 ; NO | |
| 601 bra get_analog_switches_sw1_pressed ; YES (right button normal) | |
| 602 | |
| 603 get_analog_switches_sw1_inv: | |
| 582 | 604 subwf analog_sw1,W ; average (~128) |
| 623 | 605 cpfslt ADRESH ; pressed? |
| 606 bra get_analog_switches_4 ; NO | |
| 607 ;bra get_analog_switches_sw1_pressed ; YES (right button inverted) | |
| 608 | |
| 609 get_analog_switches_sw1_pressed: | |
| 610 bsf analog_sw1_pressed ; set right button as pressed | |
| 611 | |
| 612 get_analog_switches_4: | |
| 604 | 613 movlw b'10001101' ; restore to right justified |
| 582 | 614 movwf ADCON2 |
| 623 | 615 |
| 616 banksel common ; back to bank common | |
| 617 btfsc analog_sw1_pressed ; right button pressed? | |
| 618 return ; YES - done | |
| 619 btfsc analog_sw2_pressed ; left button pressed? | |
| 620 return ; YES - done | |
| 621 setf TMR1H ; NO to both - no button pressed, set timer1 to overflow quickly | |
| 582 | 622 return |
| 448 | 623 |
| 0 | 624 END |