Mercurial > public > hwos_code
annotate src/calibrate.asm @ 625:5c2ca77ce2df
doc update (Byte 59)
| author | heinrichsweikamp |
|---|---|
| date | Sun, 23 Jun 2019 13:29:17 +0200 |
| parents | ca4556fb60b9 |
| children | c40025d8e750 |
| rev | line source |
|---|---|
| 113 | 1 ;============================================================================= |
| 2 ; | |
| 604 | 3 ; File calibration.asm REFACTORED VERSION V2.98b |
| 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" | |
| 604 | 15 #include "isr.inc" |
| 113 | 16 |
| 17 | |
| 582 | 18 calibrate CODE |
| 19 | |
| 604 | 20 |
| 21 global transmit_setpoint ; transmit current setpoint from WREG (in cbar) to external electronics | |
| 22 transmit_setpoint: | |
| 23 return ; !!!! FUNCTION IS CURRENTLY DISABLED !!!! | |
| 24 btfss s8_digital ; S8 Digital connection existing? | |
| 25 return ; NO - ignore | |
| 26 ; YES - transmit setpoint from WREG | |
| 27 clrf lo ; initialize checksum | |
| 28 movwf hi ; store setpoint | |
| 29 movlw 0xAA ; start byte | |
| 30 rcall tx_to_HUD ; transmit to HUD | |
| 31 movlw 0x60 ; command new SP | |
| 32 rcall tx_to_HUD ; transmit to HUD | |
| 33 movff hi,WREG ; SP in cbar | |
| 34 rcall tx_to_HUD ; transmit to HUD | |
| 35 movff lo,WREG ; checksum | |
| 36 rcall tx_to_HUD_cs ; transmit checksum | |
| 37 return | |
| 38 | |
| 39 tx_to_HUD: ; entry point to transmit a byte to the HUD | |
| 40 addwf lo,F ; add byte to checksum | |
| 41 tx_to_HUD_cs: ; entry point to transmit the checksum | |
| 42 movff WREG,TXREG2 ; transmit byte | |
| 43 call rs232_wait_tx2 ; wait for UART | |
| 44 return | |
| 45 | |
|
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46 |
| 604 | 47 global calibrate_mix |
| 48 calibrate_mix: | |
| 49 ; set usage and calibration flags as per default | |
| 50 bsf use_O2_sensor1 | |
| 51 bsf use_O2_sensor2 | |
| 52 bsf use_O2_sensor3 | |
| 53 bsf sensor1_calibrated_ok | |
| 54 bsf sensor2_calibrated_ok | |
| 55 bsf sensor3_calibrated_ok | |
| 56 | |
| 57 ; check for HUD | |
| 58 btfss s8_digital ; S8 Digital connection existing? | |
| 59 bra calibrate_mix1 ; NO - skip HUD part | |
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60 |
| 604 | 61 ; calibrate any S8-connected HUD |
| 62 clrf lo ; initialize checksum | |
| 63 movlw 0xAA ; start byte | |
| 64 rcall tx_to_HUD ; transmit to HUD | |
| 65 movlw 0x31 ; calibration command | |
| 66 rcall tx_to_HUD ; transmit to HUD | |
| 67 movff opt_calibration_O2_ratio,WREG ; calibration gas %O2 | |
| 68 rcall tx_to_HUD ; transmit to HUD | |
| 69 movff amb_pressure+0,WREG ; ambient pressure low byte | |
| 70 rcall tx_to_HUD ; transmit to HUD | |
| 71 movff amb_pressure+1,WREG ; ambient pressure high byte | |
| 72 rcall tx_to_HUD ; transmit to HUD | |
| 73 movff lo,WREG ; checksum | |
| 74 rcall tx_to_HUD_cs ; transmit to HUD | |
| 75 ; bra calibrate_mix2 | |
| 582 | 76 |
| 604 | 77 ; calibrate internal sensors |
| 78 calibrate_mix1: ; compute %O2 * 100 * ambient_pressure[mbar] / 100 | |
| 79 movff opt_calibration_O2_ratio,WREG | |
| 80 mullw .100 | |
| 81 movff PRODL,xA+0 | |
| 82 movff PRODH,xA+1 | |
| 83 SAFE_2BYTE_COPY amb_pressure,xB | |
| 84 call mult16x16 ; xA*xB=xC | |
| 85 movlw LOW .100 | |
| 86 movwf xB+0 | |
| 87 movlw HIGH .100 | |
| 88 movwf xB+1 | |
| 89 call div32x16 ; xC:4 / xB:2 = xC+3:xC+2 with xC+1:xC+0 as remainder | |
| 90 | |
| 91 ; keep a copy of the result | |
| 92 movff xC+0,lo | |
| 93 movff xC+1,hi | |
| 94 movff xC+2,up | |
| 95 movff xC+3,ex | |
| 96 | |
| 97 ; compute factor for sensor 1 | |
| 98 movff o2_mv_sensor1+0,xB+0 | |
| 99 movff o2_mv_sensor1+1,xB+1 | |
| 100 call div32x16 ; xC:4 / xB:2 = xC+3:xC+2 with xC+1:xC+0 as remainder | |
| 101 movff xC+0,opt_x_s1+0 ; xC= ppO2/mV as factor for sensor 1 | |
| 102 movff xC+1,opt_x_s1+1 | |
| 103 | |
| 104 ; restore result | |
| 105 movff lo,xC+0 | |
| 106 movff hi,xC+1 | |
| 107 movff up,xC+2 | |
| 108 movff ex,xC+3 | |
| 109 | |
| 110 ; compute factor for sensor 2 | |
| 111 movff o2_mv_sensor2+0,xB+0 | |
| 112 movff o2_mv_sensor2+1,xB+1 | |
| 113 call div32x16 ; xC:4 / xB:2 = xC+3:xC+2 with xC+1:xC+0 as remainder | |
| 114 movff xC+0,opt_x_s2+0 ; xC= ppO2/mV as factor for sensor 2 | |
| 115 movff xC+1,opt_x_s2+1 | |
| 116 | |
| 117 ; restore result | |
| 118 movff lo,xC+0 | |
| 119 movff hi,xC+1 | |
| 120 movff up,xC+2 | |
| 121 movff ex,xC+3 | |
| 122 | |
| 123 ; compute factor for sensor 3 | |
| 124 movff o2_mv_sensor3+0,xB+0 | |
| 125 movff o2_mv_sensor3+1,xB+1 | |
| 126 call div32x16 ; xC:4 / xB:2 = xC+3:xC+2 with xC+1:xC+0 as remainder | |
| 127 movff xC+0,opt_x_s3+0 ; xC= ppO2/mV as factor for sensor 3 | |
| 128 movff xC+1,opt_x_s3+1 | |
| 129 | |
| 130 ; check sensor 1 for min/max mV | |
| 131 movff o2_mv_sensor1+0, sub_a+0 ; get mV from sensor 1 | |
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132 movff o2_mv_sensor1+1, sub_a+1 |
| 604 | 133 rcall calibrate_mix_helper ; check mV for min/max thresholds, returns with WREG = 0 if ok, else WREG = 1 |
| 134 TSTFSZ WREG ; sensor mV within thresholds? | |
| 135 bcf use_O2_sensor1 ; NO - clear usage flag | |
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136 |
| 604 | 137 ; check sensor 2 for min/max mV |
| 138 movff o2_mv_sensor2+0, sub_a+0 ; get mV from sensor 2 | |
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139 movff o2_mv_sensor2+1, sub_a+1 |
| 604 | 140 rcall calibrate_mix_helper ; check mV for min/max thresholds, returns with WREG = 0 if ok, else WREG = 1 |
| 141 TSTFSZ WREG ; sensor mV within thresholds? | |
| 142 bcf use_O2_sensor2 ; NO - clear usage flag | |
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143 |
| 604 | 144 ; check sensor 3 for min/max mV |
| 145 movff o2_mv_sensor3+0, sub_a+0 ; get mV from sensor 3 | |
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146 movff o2_mv_sensor3+1, sub_a+1 |
| 604 | 147 rcall calibrate_mix_helper ; check mV for min/max thresholds, returns with WREG = 0 if ok, else WREG = 1 |
| 148 TSTFSZ WREG ; sensor mV within thresholds? | |
| 149 bcf use_O2_sensor3 ; NO - clear usage flag | |
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150 |
| 604 | 151 calibrate_mix2: |
| 152 ; check for HUD | |
| 153 btfss hud_connection_ok ; HUD connection existing? | |
| 154 bra calibrate_mix3 ; NO - skip HUD part | |
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155 |
| 604 | 156 ; Copy disable flags from HUD digital input |
| 582 | 157 btfss sensor1_active |
| 158 bcf use_O2_sensor1 | |
| 159 btfss sensor2_active | |
| 160 bcf use_O2_sensor2 | |
| 161 btfss sensor3_active | |
| 162 bcf use_O2_sensor3 | |
| 113 | 163 |
| 604 | 164 calibrate_mix3: |
| 165 ; clear calibration flags if sensors are not found to be ok | |
| 166 btfss use_O2_sensor1 ; sensor 1 out of range? | |
| 167 bcf sensor1_calibrated_ok ; YES - disable this sensor | |
| 168 btfss use_O2_sensor2 ; sensor 2 out of range? | |
| 169 bcf sensor2_calibrated_ok ; YES - disable this sensor | |
| 170 btfss use_O2_sensor3 ; sensor 3 out of range? | |
| 171 bcf sensor3_calibrated_ok ; YES - disable this sensor | |
| 113 | 172 |
| 604 | 173 ; When no sensor is found, enable all three to show error state and clear calibration factors |
| 192 | 174 btfsc use_O2_sensor1 |
| 113 | 175 return |
| 192 | 176 btfsc use_O2_sensor2 |
| 113 | 177 return |
| 192 | 178 btfsc use_O2_sensor3 |
| 113 | 179 return |
| 604 | 180 ; Enable all sensors |
| 192 | 181 bsf use_O2_sensor1 |
| 182 bsf use_O2_sensor2 | |
| 183 bsf use_O2_sensor3 | |
| 604 | 184 ; Clear calibration factors |
| 582 | 185 banksel opt_x_s1+0 |
| 113 | 186 clrf opt_x_s1+0 |
| 187 clrf opt_x_s1+1 | |
| 188 clrf opt_x_s2+0 | |
| 189 clrf opt_x_s2+1 | |
| 190 clrf opt_x_s3+0 | |
| 191 clrf opt_x_s3+1 | |
| 582 | 192 banksel common |
| 113 | 193 return |
| 194 | |
| 604 | 195 calibrate_mix_helper: |
| 196 movlw LOW min_mv ; load minimum threshold... | |
| 197 movwf sub_b+0 ; ...into sub_b | |
| 198 movlw HIGH min_mv | |
| 199 movwf sub_b+1 | |
| 200 call sub16 ; sub_c = sub_a - sub_b | |
| 201 btfsc neg_flag ; sensor mV lower than minimum threshold? | |
| 202 retlw .1 ; YES - return signaling threshold violation | |
| 203 movlw LOW max_mv ; load maximum threshold... | |
| 204 movwf sub_b+0 ; ...into sub_b | |
| 205 movlw HIGH max_mv | |
| 206 movwf sub_b+1 | |
| 207 call sub16 ; sub_c = sub_a - sub_b | |
| 208 btfss neg_flag ; sensor mV higher than maximum threshold? | |
| 209 retlw .1 ; YES - return signaling threshold violation | |
| 210 retlw .0 ; NO - return signaling min/max ok | |
| 560 | 211 |
| 448 | 212 |
| 560 | 213 global compute_mvolts_for_all_sensors |
| 604 | 214 compute_mvolts_for_all_sensors: ; compute mV or all sensors (S8 mode) |
| 113 | 215 ; compute AD results in 100µV steps (16bit/sensor) |
| 216 ; 24bit AD result is in 244,1406541nV | |
| 582 | 217 ; Divide 24bit value through 409,5999512 -> 410 (0,01% error) |
| 218 #DEFINE ad2mv_factor .410 | |
| 604 | 219 movlw LOW ad2mv_factor |
| 220 movwf xB+0 | |
| 221 movlw HIGH ad2mv_factor | |
| 222 movwf xB+1 | |
| 560 | 223 ; Sensor 1 |
| 224 clrf xC+3 | |
| 225 movff s8_rawdata_sensor1+2,xC+2 | |
| 226 movff s8_rawdata_sensor1+1,xC+1 | |
| 227 movff s8_rawdata_sensor1+0,xC+0 | |
| 582 | 228 call div32x16 ; xC:4 / xB:2 = xC+3:xC+2 with xC+1:xC+0 as remainder |
| 560 | 229 movff xC+1,o2_mv_sensor1+1 |
| 604 | 230 movff xC+0,o2_mv_sensor1+0 ; in 100 uV steps |
| 560 | 231 ; Sensor 2 |
| 232 clrf xC+3 | |
| 233 movff s8_rawdata_sensor2+2,xC+2 | |
| 234 movff s8_rawdata_sensor2+1,xC+1 | |
| 235 movff s8_rawdata_sensor2+0,xC+0 | |
| 582 | 236 call div32x16 ; xC:4 / xB:2 = xC+3:xC+2 with xC+1:xC+0 as remainder |
| 560 | 237 movff xC+1,o2_mv_sensor2+1 |
| 604 | 238 movff xC+0,o2_mv_sensor2+0 ; in 100 uV steps |
| 560 | 239 ; Sensor 3 |
| 240 clrf xC+3 | |
| 241 movff s8_rawdata_sensor3+2,xC+2 | |
| 242 movff s8_rawdata_sensor3+1,xC+1 | |
| 243 movff s8_rawdata_sensor3+0,xC+0 | |
| 582 | 244 call div32x16 ; xC:4 / xB:2 = xC+3:xC+2 with xC+1:xC+0 as remainder |
| 560 | 245 movff xC+1,o2_mv_sensor3+1 |
| 604 | 246 movff xC+0,o2_mv_sensor3+0 ; in 100 uV steps |
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247 |
| 604 | 248 bcf new_s8_data_available ; clear flag |
| 249 return ; done | |
| 113 | 250 |
| 251 END |