Mercurial > public > hwos_code
annotate src/calibrate.asm @ 632:0347acdf6d8e
changelog updates
| author | heinrichsweikamp |
|---|---|
| date | Sat, 29 Feb 2020 16:57:45 +0100 |
| parents | 185ba2f91f59 |
| children | 4050675965ea |
| rev | line source |
|---|---|
| 113 | 1 ;============================================================================= |
| 2 ; | |
| 631 | 3 ; File calibration.asm combined next generation V3.08.8 |
| 113 | 4 ; |
| 5 ; o2 sensor calibration subroutines | |
| 6 ; | |
| 7 ; Copyright (c) 2014, Heinrichs Weikamp, all right reserved. | |
| 8 ;============================================================================= | |
| 9 | |
| 582 | 10 #include "hwos.inc" |
| 604 | 11 #include "shared_definitions.h" ; mailbox between c and asm |
| 582 | 12 #include "math.inc" |
| 13 #include "adc_lightsensor.inc" | |
| 14 #include "eeprom_rs232.inc" | |
| 113 | 15 |
| 16 | |
| 582 | 17 calibrate CODE |
| 18 | |
| 623 | 19 ;============================================================================= |
| 20 | |
| 21 IFDEF _external_sensor | |
| 604 | 22 |
| 23 global transmit_setpoint ; transmit current setpoint from WREG (in cbar) to external electronics | |
| 24 transmit_setpoint: | |
| 623 | 25 return ; !!!! FUNCTION IS CURRENTLY DISABLED !!!! |
| 26 btfss s8_digital_avail ; do we have a digital S8 interface? | |
| 604 | 27 return ; NO - ignore |
| 28 ; YES - transmit setpoint from WREG | |
| 29 clrf lo ; initialize checksum | |
| 623 | 30 movff char_I_const_ppO2,hi ; copy setpoint value to hi |
| 604 | 31 movlw 0xAA ; start byte |
| 32 rcall tx_to_HUD ; transmit to HUD | |
| 33 movlw 0x60 ; command new SP | |
| 34 rcall tx_to_HUD ; transmit to HUD | |
| 35 movff hi,WREG ; SP in cbar | |
| 36 rcall tx_to_HUD ; transmit to HUD | |
| 37 movff lo,WREG ; checksum | |
| 38 rcall tx_to_HUD_cs ; transmit checksum | |
| 39 return | |
| 40 | |
| 41 tx_to_HUD: ; entry point to transmit a byte to the HUD | |
| 42 addwf lo,F ; add byte to checksum | |
| 43 tx_to_HUD_cs: ; entry point to transmit the checksum | |
| 44 movff WREG,TXREG2 ; transmit byte | |
| 631 | 45 call ir_s8_wait_tx ; wait for UART |
| 604 | 46 return |
| 47 | |
|
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parents:
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changeset
|
48 |
| 604 | 49 global calibrate_mix |
| 50 calibrate_mix: | |
| 51 ; set usage and calibration flags as per default | |
| 52 bsf use_O2_sensor1 | |
| 53 bsf use_O2_sensor2 | |
| 54 bsf use_O2_sensor3 | |
| 55 bsf sensor1_calibrated_ok | |
| 56 bsf sensor2_calibrated_ok | |
| 57 bsf sensor3_calibrated_ok | |
| 58 | |
| 623 | 59 ; ISR-safe 2 byte copy of the current pressure to xB for later use |
| 60 SMOVII pressure_abs,xB | |
| 61 | |
| 604 | 62 ; check for HUD |
| 623 | 63 btfss s8_digital_avail ; do we have a digital S8 interface? |
| 604 | 64 bra calibrate_mix1 ; NO - skip HUD part |
|
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|
65 |
| 604 | 66 ; calibrate any S8-connected HUD |
| 67 clrf lo ; initialize checksum | |
| 68 movlw 0xAA ; start byte | |
| 69 rcall tx_to_HUD ; transmit to HUD | |
| 70 movlw 0x31 ; calibration command | |
| 71 rcall tx_to_HUD ; transmit to HUD | |
| 72 movff opt_calibration_O2_ratio,WREG ; calibration gas %O2 | |
| 73 rcall tx_to_HUD ; transmit to HUD | |
| 623 | 74 movff xB+0,WREG ; current absolute pressure low byte |
| 604 | 75 rcall tx_to_HUD ; transmit to HUD |
| 623 | 76 movff xB+1,WREG ; current absolute pressure high byte |
| 604 | 77 rcall tx_to_HUD ; transmit to HUD |
| 78 movff lo,WREG ; checksum | |
| 79 rcall tx_to_HUD_cs ; transmit to HUD | |
| 80 ; bra calibrate_mix2 | |
| 582 | 81 |
| 604 | 82 ; calibrate internal sensors |
| 623 | 83 calibrate_mix1: ; compute %O2 * 100 * absolute pressure [mbar] / 100 |
| 604 | 84 movff opt_calibration_O2_ratio,WREG |
| 85 mullw .100 | |
| 623 | 86 MOVII PROD,xA |
| 604 | 87 call mult16x16 ; xA*xB=xC |
| 623 | 88 MOVLI .100,xB |
| 89 call div32x16 ; xC:4 = xC:4 / xB:2 with xA as remainder | |
| 604 | 90 |
| 91 ; keep a copy of the result | |
| 623 | 92 movff xC+0,mpr+0 |
| 93 movff xC+1,mpr+1 | |
| 94 movff xC+2,mpr+2 | |
| 95 movff xC+3,mpr+3 | |
| 604 | 96 |
| 97 ; compute factor for sensor 1 | |
| 623 | 98 MOVII sensor1_mv,xB |
| 99 call div32x16 ; xC:4 = xC:4 / xB:2 with xA as remainder | |
| 100 MOVII xC,opt_x_s1 ; xC = ppO2/mV as factor for sensor 1 | |
| 604 | 101 |
| 102 ; restore result | |
| 623 | 103 movff mpr+0,xC+0 |
| 104 movff mpr+1,xC+1 | |
| 105 movff mpr+2,xC+2 | |
| 106 movff mpr+3,xC+3 | |
| 604 | 107 |
| 108 ; compute factor for sensor 2 | |
| 623 | 109 MOVII sensor2_mv,xB |
| 110 call div32x16 ; xC:4 = xC:4 / xB:2 with xA as remainder | |
| 111 MOVII xC,opt_x_s2 ; xC = ppO2/mV as factor for sensor 2 | |
| 604 | 112 |
| 113 ; restore result | |
| 623 | 114 movff mpr+0,xC+0 |
| 115 movff mpr+1,xC+1 | |
| 116 movff mpr+2,xC+2 | |
| 117 movff mpr+3,xC+3 | |
| 604 | 118 |
| 119 ; compute factor for sensor 3 | |
| 623 | 120 MOVII sensor3_mv,xB |
| 121 call div32x16 ; xC:4 = xC:4 / xB:2 with xA as remainder | |
| 122 MOVII xC,opt_x_s3 ; xC = ppO2/mV as factor for sensor 3 | |
| 604 | 123 |
| 124 ; check sensor 1 for min/max mV | |
| 623 | 125 MOVII sensor1_mv,sub_a ; get mV from sensor 1 |
| 604 | 126 rcall calibrate_mix_helper ; check mV for min/max thresholds, returns with WREG = 0 if ok, else WREG = 1 |
| 127 TSTFSZ WREG ; sensor mV within thresholds? | |
| 128 bcf use_O2_sensor1 ; NO - clear usage flag | |
|
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heinrichsweikamp
parents:
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diff
changeset
|
129 |
| 604 | 130 ; check sensor 2 for min/max mV |
| 623 | 131 MOVII sensor2_mv,sub_a ; get mV from sensor 2 |
| 604 | 132 rcall calibrate_mix_helper ; check mV for min/max thresholds, returns with WREG = 0 if ok, else WREG = 1 |
| 133 TSTFSZ WREG ; sensor mV within thresholds? | |
| 134 bcf use_O2_sensor2 ; NO - clear usage flag | |
|
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NEW: Setpoint-Fallback option for external O2 sensor failure
heinrichsweikamp
parents:
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diff
changeset
|
135 |
| 604 | 136 ; check sensor 3 for min/max mV |
| 623 | 137 MOVII sensor3_mv,sub_a ; get mV from sensor 3 |
| 604 | 138 rcall calibrate_mix_helper ; check mV for min/max thresholds, returns with WREG = 0 if ok, else WREG = 1 |
| 139 TSTFSZ WREG ; sensor mV within thresholds? | |
| 140 bcf use_O2_sensor3 ; NO - clear usage flag | |
|
145
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heinrichsweikamp
parents:
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diff
changeset
|
141 |
| 604 | 142 calibrate_mix2: |
| 143 ; check for HUD | |
| 144 btfss hud_connection_ok ; HUD connection existing? | |
| 145 bra calibrate_mix3 ; NO - skip HUD part | |
|
145
e3ac5b2021bc
NEW: Setpoint-Fallback option for external O2 sensor failure
heinrichsweikamp
parents:
113
diff
changeset
|
146 |
| 623 | 147 ; copy disable flags from HUD digital input |
| 582 | 148 btfss sensor1_active |
| 149 bcf use_O2_sensor1 | |
| 150 btfss sensor2_active | |
| 151 bcf use_O2_sensor2 | |
| 152 btfss sensor3_active | |
| 153 bcf use_O2_sensor3 | |
| 113 | 154 |
| 604 | 155 calibrate_mix3: |
| 156 ; clear calibration flags if sensors are not found to be ok | |
| 157 btfss use_O2_sensor1 ; sensor 1 out of range? | |
| 158 bcf sensor1_calibrated_ok ; YES - disable this sensor | |
| 159 btfss use_O2_sensor2 ; sensor 2 out of range? | |
| 160 bcf sensor2_calibrated_ok ; YES - disable this sensor | |
| 161 btfss use_O2_sensor3 ; sensor 3 out of range? | |
| 162 bcf sensor3_calibrated_ok ; YES - disable this sensor | |
| 113 | 163 |
| 623 | 164 ; when no sensor is found, enable all three to show error state and clear calibration factors |
| 192 | 165 btfsc use_O2_sensor1 |
| 113 | 166 return |
| 192 | 167 btfsc use_O2_sensor2 |
| 113 | 168 return |
| 192 | 169 btfsc use_O2_sensor3 |
| 113 | 170 return |
| 623 | 171 |
| 172 ; enable all sensors | |
| 192 | 173 bsf use_O2_sensor1 |
| 174 bsf use_O2_sensor2 | |
| 175 bsf use_O2_sensor3 | |
| 623 | 176 ; clear calibration factors |
| 177 banksel opt_x_s1 ; switch to bank options table | |
| 178 CLRI opt_x_s1 | |
| 179 CLRI opt_x_s2 | |
| 180 CLRI opt_x_s3 | |
| 181 banksel common ; back to bank common | |
| 113 | 182 return |
| 183 | |
| 604 | 184 calibrate_mix_helper: |
| 623 | 185 MOVLI min_mv,sub_b ; load minimum threshold into sub_b |
| 604 | 186 call sub16 ; sub_c = sub_a - sub_b |
| 187 btfsc neg_flag ; sensor mV lower than minimum threshold? | |
| 188 retlw .1 ; YES - return signaling threshold violation | |
| 623 | 189 MOVLI max_mv,sub_b ; load maximum threshold into sub_b |
| 604 | 190 call sub16 ; sub_c = sub_a - sub_b |
| 191 btfss neg_flag ; sensor mV higher than maximum threshold? | |
| 192 retlw .1 ; YES - return signaling threshold violation | |
| 193 retlw .0 ; NO - return signaling min/max ok | |
| 560 | 194 |
| 448 | 195 |
| 560 | 196 global compute_mvolts_for_all_sensors |
| 604 | 197 compute_mvolts_for_all_sensors: ; compute mV or all sensors (S8 mode) |
| 623 | 198 ; compute AD results in 100 µV steps (16 bit/sensor) |
| 199 ; 24 bit AD result is in 244.1406541 nV | |
| 200 ; divide 24 bit value by 409.5999512 -> 410 with only 0.01% error | |
| 582 | 201 #DEFINE ad2mv_factor .410 |
| 623 | 202 |
| 203 MOVLI ad2mv_factor,xB | |
| 204 | |
| 560 | 205 ; Sensor 1 |
| 623 | 206 SMOVTT s8_rawdata_sensor1,xC ; ISR-safe copy of 3 bytes to xC |
| 207 clrf xC+3 ; clear MSB of xC | |
| 208 call div32x16 ; xC:4 = xC:4 / xB:2 with xA as remainder | |
| 209 MOVII xC,sensor1_mv ; in 100 µV steps | |
| 210 | |
| 560 | 211 ; Sensor 2 |
| 623 | 212 SMOVTT s8_rawdata_sensor2,xC ; ISR-safe copy of 3 bytes to xC |
| 213 clrf xC+3 ; clear MSB of xC | |
| 214 call div32x16 ; xC:4 = xC:4 / xB:2 with xA as remainder | |
| 215 MOVII xC,sensor2_mv ; in 100 µV steps | |
| 216 | |
| 560 | 217 ; Sensor 3 |
| 623 | 218 SMOVTT s8_rawdata_sensor3,xC ; ISR-safe copy of 3 bytes to xC |
| 219 clrf xC+3 ; clear MSB of xC | |
| 220 call div32x16 ; xC:4 = xC:4 / xB:2 with xA as remainder | |
| 221 MOVII xC,sensor3_mv ; in 100 µV steps | |
|
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add setpoint change to first sample in CCR mode
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222 |
| 604 | 223 return ; done |
| 113 | 224 |
| 623 | 225 ENDIF ; _external_sensor |
| 226 | |
| 227 ;============================================================================= | |
| 228 | |
| 229 END |