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view src/adc_lightsensor.asm @ 270:bddb63835035
increase min input voltage from 1,2mV to 1,9mV (cR only)
| author | heinrichsweikamp |
|---|---|
| date | Wed, 22 Apr 2015 16:03:31 +0200 |
| parents | 6a1ac89e2098 |
| children | 653a3ab08062 |
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;============================================================================= ; ; File adc.asm ; ; ; Copyright (c) 2011, JD Gascuel, HeinrichsWeikamp, all right reserved. ;============================================================================= ; HISTORY ; 2011-08-08 : [mH] moving from OSTC code #include "ostc3.inc" #include "math.inc" #include "wait.inc" #include "eeprom_rs232.inc" #include "i2c.inc" sensors CODE wait_adc: movwf ADCON0 nop bsf ADCON0,1 ; start ADC wait_adc2: btfsc ADCON0,1 ; Wait... bra wait_adc2 return global get_battery_voltage get_battery_voltage: ; starts ADC and waits until fnished btfss rechargeable bra get_battery_voltage1 ; Normal ostc3 hardware call lt2942_get_accumulated_charge call lt2942_get_voltage btfsc divemode return ; Not in divemode bcf cv_active bcf cc_active bcf LEDr bcf TRISJ,2 ; Chrg-Out output bsf CHRG_OUT btfss CHRG_IN bra charge_cc_active bcf CHRG_OUT bsf TRISJ,2 ; Chrg-Out high impedance WAITMS d'1' btfsc CHRG_IN return ;cv_active: decfsz safety_stop_countdown,F return movlw .15 cpfsgt batt_voltage+1 ; Batt Voltage >= 16*256mV (4,096V)? bra charge_cc_active ; No bsf cc_active bsf cv_active bsf LEDr ; Indicate charging call lt2942_charge_done ; Reset accumulating registers to 0xFFFF WAITMS d'10' bcf LEDr ; Indicate charging bsf safety_stop_countdown,0 ; =1 return charge_cc_active: bsf cc_active bsf LEDr ; Indicate charging bcf CHRG_OUT bsf TRISJ,2 ; Chrg-Out high impedance movlw .10 movwf safety_stop_countdown return get_battery_voltage1: bsf adc_running ; =1: The ADC is in use movlw b'00100000' ; 2.048V Vref+ -> 1LSB = 500µV movwf ADCON1 movlw b'00011001' ; power on ADC, select AN6 rcall wait_adc movff ADRESH,batt_voltage+1 ; store value movff ADRESL,batt_voltage+0 ; store value bcf ADCON0,0 ; power off ADC ; Multiply with 2,006 to be excact here... ; bcf STATUS,C ; rlcf xA+0,F ; ; rlcf xA+1,F ; x2 ; movff xA+0,batt_voltage+0 ; store value ; movff xA+1,batt_voltage+1 movlw LOW lithium_36v_low movwf sub_a+0 movlw HIGH lithium_36v_low movwf sub_a+1 movff batt_voltage+0,sub_b+0 movff batt_voltage+1,sub_b+1 call subU16 ; sub_c = sub_a - sub_b ; Battery is 3,6V (>lithium_36v_low?) btfss neg_flag bra get_battery_voltage4 ; No, use 1,5V bsf battery_is_36v ; Yes, set flag (Cleared in power-on reset only!) ; Check if the battery is near-dead already movlw LOW lithium_36v_empty movwf sub_a+0 movlw HIGH lithium_36v_empty movwf sub_a+1 call subU16 ; sub_c = sub_a - sub_b ; Battery is not dead yet (>lithium_36v_empty?) btfsc neg_flag bra get_battery_voltage2 ; Yes, battery is still ok ; Battery is probably dead very soon ; Set ">=24Ah used" into battery gauge registers movlw .128 movff WREG,battery_gauge+5 get_battery_voltage2: ; Use 3,6V battery gauging mode movff battery_gauge+5,xC+3 movff battery_gauge+4,xC+2 movff battery_gauge+3,xC+1 movff battery_gauge+2,xC+0 ; battery_gauge:6 is nAs ; devide through 65536 ; devide through 364 ; Result is in percent of a 2,4Ah Battery movlw LOW .364 movwf xB+0 movlw HIGH .364 movwf xB+1 call div32x16 ; xC:4 / xB:2 = xC+3:xC+2 with xC+1:xC+0 as remainder movff xC+0,lo ; Limit to 100 movlw .100 cpfslt lo movwf lo ; lo will be between 0 (Full) and 100 (empty) movf lo,W sublw .100 movwf lo get_battery_voltage3: movlw .100 cpfslt lo movwf lo ; lo will be between 100 (Full) and 0 (empty) ; use 3,6V battery sensing based on 50mA load ; 75% movff batt_voltage+0,sub_b+0 movff batt_voltage+1,sub_b+1 movlw LOW lithium_36v_75 movwf sub_a+0 movlw HIGH lithium_36v_75 movwf sub_a+1 call subU16 ; sub_c = sub_a - sub_b btfsc neg_flag bra get_battery_voltage3a movlw .75 movwf lo get_battery_voltage3a: ; 50% movlw LOW lithium_36v_50 movwf sub_a+0 movlw HIGH lithium_36v_50 movwf sub_a+1 call subU16 ; sub_c = sub_a - sub_b btfsc neg_flag bra get_battery_voltage3b movlw .50 movwf lo get_battery_voltage3b: ; 25% movlw LOW lithium_36v_25 movwf sub_a+0 movlw HIGH lithium_36v_25 movwf sub_a+1 call subU16 ; sub_c = sub_a - sub_b btfsc neg_flag bra get_battery_voltage3c movlw .25 movwf lo get_battery_voltage3c: ; 10% movlw LOW lithium_36v_10 movwf sub_a+0 movlw HIGH lithium_36v_10 movwf sub_a+1 call subU16 ; sub_c = sub_a - sub_b btfsc neg_flag bra get_battery_voltage3d movlw .10 movwf lo get_battery_voltage3d: movlw .100 cpfslt lo movwf lo ; lo will be between 100 (Full) and 0 (empty) movf batt_percent,W cpfsgt lo ; keep batt_percent on the lowest value found movff lo,batt_percent ; store value ; btfsc battery_is_36v ; but always use computed value for 3,6V battery ; movff lo,batt_percent ; store value bcf adc_running ; =1: The ADC is in use return get_battery_voltage4: ; Use 1,5V battery voltage mode ; Use approximation (batt_voltage:2-aa_15v_low)/4 = lo movff batt_voltage+0,sub_a+0 movff batt_voltage+1,sub_a+1 movlw LOW aa_15v_low movwf sub_b+0 movlw HIGH aa_15v_low movwf sub_b+1 call subU16 ; sub_c = sub_a - sub_b bcf STATUS,C rrcf sub_c+1 rrcf sub_c+0 ; /2 bcf STATUS,C rrcf sub_c+1 rrcf sub_c+0 ; /4 movff sub_c+0,lo bra get_battery_voltage3d ; Check limits and return global get_ambient_level get_ambient_level: ; starts ADC and waits until finished btfsc adc_running ; ADC in use? return ; Yes, return btfsc ambient_sensor bra get_ambient_level1 ; Normal ostc3 hardware banksel isr_backup ; Back to Bank0 ISR data movff opt_brightness,isr1_temp incf isr1_temp,F ; adjust 0-2 to 1-3 movlw ambient_light_max_high_cr; cR hardware brightest setting dcfsnz isr1_temp,F movlw ambient_light_max_eco ; brightest setting dcfsnz isr1_temp,F movlw ambient_light_max_medium; brightest setting movff WREG,ambient_light+0 ; Set to max. movff ambient_light+0,max_CCPR1L ; Store value for dimming in TMR7 interrupt return get_ambient_level1: movlw b'00000000' ; Vref+ = Vdd movwf ADCON1 movlw b'00011101' ; power on ADC, select AN7 rcall wait_adc movff ADRESH,ambient_light+1 movff ADRESL,ambient_light+0 bcf ADCON0,0 ; power off ADC ; ambient_light:2 is between 4096 (direct sunlight) and about 200 (darkness) ; First: Devide through 16 bcf STATUS,C rrcf ambient_light+1 rrcf ambient_light+0 bcf STATUS,C rrcf ambient_light+1 rrcf ambient_light+0 bcf STATUS,C rrcf ambient_light+1 rrcf ambient_light+0 bcf STATUS,C rrcf ambient_light+1 rrcf ambient_light+0 ; Result: ambient_light:2/16 ; Now, make sure to have value between ambient_light_low and ambient_light_max movlw .254 tstfsz ambient_light+1 ; >255? movwf ambient_light+0 ; avoid ADC clipping incfsz ambient_light+0,W ; =255? bra get_ambient_level2 ; No, continue movlw .254 movwf ambient_light+0 ; avoid ADC clipping get_ambient_level2: movlw .10 subwf ambient_light+0,F ; Subtract 10 (ADC Offset) btfsc STATUS,N movwf ambient_light+0 ; avoid clipping banksel isr_backup ; Back to Bank0 ISR data movff opt_brightness,isr1_temp btfsc RCSTA1,7 ; UART module on? clrf isr1_temp ; Yes, set temporally to eco mode incf isr1_temp,F ; adjust 0-2 to 1-3 banksel common ; flag is in bank1 movlw ambient_light_max_high_cr; cR hardware brightest setting btfss rechargeable movlw ambient_light_max_high_15V; 1,5V battery brightest setting btfsc battery_is_36v ; 3,6V battery in use? movlw ambient_light_max_high_36V ; 3,6V battery brightest setting banksel isr_backup ; Back to Bank0 ISR data dcfsnz isr1_temp,F movlw ambient_light_max_eco ; brightest setting dcfsnz isr1_temp,F movlw ambient_light_max_medium; brightest setting banksel common ; ambient_light is in Bank1 incf ambient_light+0,F ; +1 cpfslt ambient_light+0 ; smaller then WREG? movwf ambient_light+0 ; No, set to max. banksel isr_backup ; Back to Bank0 ISR data movff opt_brightness,isr1_temp incf isr1_temp,F ; adjust 0-2 to 1-3 movlw ambient_light_min_high ; darkest setting dcfsnz isr1_temp,F movlw ambient_light_min_eco ; darkest setting dcfsnz isr1_temp,F movlw ambient_light_min_medium; darkest setting dcfsnz isr1_temp,F movlw ambient_light_min_high ; darkest setting banksel common ; ambient_light is in Bank1 cpfsgt ambient_light+0 ; bigger then WREG? movwf ambient_light+0 ; No, set to min movff ambient_light+0,max_CCPR1L ; Store value for dimming in TMR7 interrupt return global get_analog_inputs get_analog_inputs: ; starts ADC and waits until finished bsf adc_running ; =1: The ADC is in use btfsc TFT_PWM bra get_analog_inputs ; Wait for PWM low movlw b'00100000' ; 2.048V Vref+ -> 1LSB = 500µV movwf ADCON1 movlw b'00100001' ; power on ADC, select AN8 rcall wait_adc bcf STATUS,C rrcf ADRESH,F ; /2 rrcf ADRESL,W ; add to o2_mv_sensor1:2 addwf o2_mv_sensor1+0,F movf ADRESH,W addwfc o2_mv_sensor1+1,F ; Devide by 2 bcf STATUS,C rrcf o2_mv_sensor1+1,F ; /2 rrcf o2_mv_sensor1+0,F movlw HIGH ignore_mv cpfsgt o2_mv_sensor1+1 ; >ignore_mv? bra get_analog_inputs2a ; No ; Yes, ignore this reading clrf o2_mv_sensor1+1 clrf o2_mv_sensor1+0 get_analog_inputs2a: ; Ignore 1,2mV noise for not-connected inputs tstfsz o2_mv_sensor1+1 ; >25,5mV? bra get_analog_inputs2 ; Yes, skip here movlw .19 cpfsgt o2_mv_sensor1+0 ; >1,9mV? clrf o2_mv_sensor1+0 ; no, clear result get_analog_inputs2: movlw b'00100101' ; power on ADC, select AN9 rcall wait_adc bcf STATUS,C rrcf ADRESH,F ; /2 rrcf ADRESL,W ; add to o2_mv_sensor2:2 addwf o2_mv_sensor2+0,F movf ADRESH,W addwfc o2_mv_sensor2+1,F ; Devide by 2 bcf STATUS,C rrcf o2_mv_sensor2+1,F ; /2 rrcf o2_mv_sensor2+0,F movlw HIGH ignore_mv cpfsgt o2_mv_sensor2+1 ; >ignore_mv? bra get_analog_inputs3a ; No ; Yes, ignore this reading clrf o2_mv_sensor2+1 clrf o2_mv_sensor2+0 get_analog_inputs3a: ; Ignore 1,2mV noise for not-connected inputs tstfsz o2_mv_sensor2+1 ; >25,5mV? bra get_analog_inputs3 ; Yes, skip here movlw .19 cpfsgt o2_mv_sensor2+0 ; >1,9mV? clrf o2_mv_sensor2+0 ; no, clear result get_analog_inputs3: movlw b'00101001' ; power on ADC, select AN10 rcall wait_adc bcf STATUS,C rrcf ADRESH,F ; /2 rrcf ADRESL,W ; add to o2_mv_sensor3:2 addwf o2_mv_sensor3+0,F movf ADRESH,W addwfc o2_mv_sensor3+1,F ; Devide by 2 bcf STATUS,C rrcf o2_mv_sensor3+1,F ; /2 rrcf o2_mv_sensor3+0,F movlw HIGH ignore_mv cpfsgt o2_mv_sensor3+1 ; >ignore_mv? bra get_analog_inputs4a ; No ; Yes, ignore this reading clrf o2_mv_sensor3+1 clrf o2_mv_sensor3+0 get_analog_inputs4a: ; Ignore 1,2mV noise for not-connected inputs tstfsz o2_mv_sensor3+1 ; >25,5mV? bra get_analog_inputs4 ; Yes, skip here movlw .19 cpfsgt o2_mv_sensor3+0 ; >1,9mV? clrf o2_mv_sensor3+0 ; no, clear result get_analog_inputs4: bcf ADCON0,0 ; power off ADC bcf adc_running ; =1: The ADC is in use return global piezo_config ; Sets up piezo sensitivity of heinrichs weikamp Piezo buttons (~30ms) piezo_config: ; Settings between 20 and 200 movff opt_cR_button_right,WREG; right button rcall piezo_config_tx movff opt_cR_button_left,WREG ; left button rcall piezo_config_tx movlw .200 ; reserved rcall piezo_config_tx movlw .200 ; reserved rcall piezo_config_tx return piezo_config_tx: ; Send one byte movwf uart1_temp ; Store byte movlw .8 movwf uart2_temp ; Bit counter bcf TX3_PIEZO_CFG ; Startbit rcall piezo_config_wait_bit piezo_config_tx_loop: btfss uart1_temp,0 ; LSB first bcf TX3_PIEZO_CFG btfsc uart1_temp,0 ; LSB first bsf TX3_PIEZO_CFG rcall piezo_config_wait_bit rrncf uart1_temp,F decfsz uart2_temp,F bra piezo_config_tx_loop bsf TX3_PIEZO_CFG ; Stopbit rcall piezo_config_wait_bit return piezo_config_wait_bit: setf TMR5H movlw .255-.26 ;26 x 31,5µs = 819us movwf TMR5L bcf PIR5,TMR5IF ; Clear flag piezo_config_wait_bit3: btfss PIR5,TMR5IF bra piezo_config_wait_bit3 ; Wait loop return global reset_battery_pointer reset_battery_pointer: ; Resets battery pointer 0x07-0x0C and battery_gauge:5 extern lt2942_charge_done btfsc rechargeable ; Something to reset? call lt2942_charge_done ; Yes, reset accumulating registers to 0xFFFF clrf EEADRH clrf EEDATA ; Delete to zero write_int_eeprom 0x07 write_int_eeprom 0x08 write_int_eeprom 0x09 write_int_eeprom 0x0A write_int_eeprom 0x0B write_int_eeprom 0x0C banksel battery_gauge+0 clrf battery_gauge+0 clrf battery_gauge+1 clrf battery_gauge+2 clrf battery_gauge+3 clrf battery_gauge+4 clrf battery_gauge+5 banksel common movlw .100 movwf batt_percent return END