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3.02 release
| author | heinrichsweikamp |
|---|---|
| date | Sat, 07 Feb 2015 12:37:04 +0100 |
| parents | 380a07e4fc15 |
| children | 2a0e5d884fc3 |
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; OSTC - diving computer code ; Copyright (C) 2015 HeinrichsWeikamp GbR ; This program is free software: you can redistribute it and/or modify ; it under the terms of the GNU General Public License as published by ; the Free Software Foundation, either version 3 of the License, or ; (at your option) any later version. ; This program is distributed in the hope that it will be useful, ; but WITHOUT ANY WARRANTY; without even the implied warranty of ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ; GNU General Public License for more details. ; You should have received a copy of the GNU General Public License ; along with this program. If not, see <http://www.gnu.org/licenses/>. ; written by: Matthias Heinrichs, info@heinrichsweikamp.com ; written: 10/30/05 ; last updated: 05/16/08 ; known bugs: ; ToDo: ; the timer1 module interrupts every 62.5ms (16x/second) ; temperature and pressure is averaged over 4 measurements ; flag pressure_refresh is set every 500ms ; and provides accurate pressure (+/-1mbar stable) and temperature (0.1C stable) ;============================================================================= ; Copy a 16bit value from ISR modified registers to main registers. ; ; Because the ISR can happend at any time, the read should be redone if bytes ; changed inbetween. ; ; Trashes: WREG and TABLAT ; NOTE: Destination might be in any bank, so be BANK SAFE. ; SAFE_2BYTE_COPY MACRO from, to local retry retry: movff from+1,WREG ; High byte in W. movff WREG,to+1 ; and destination. movff from+0,to+0 ; Copy low byte. movff from+1,TABLAT ; another bank-safe read. xorwf TABLAT,W ; High byte changed ? bnz retry ENDM ;============================================================================= uartint: btfsc simulatormode_active ; are we in simulatormode? bra simulator_int ; Yes, reading is depth in m! movff RCREG,uart1_temp movlw d'96' subwf uart1_temp,F dcfsnz uart1_temp,F ; "a" bsf dump_external_eeprom ; set flag dcfsnz uart1_temp,F ; "b" bsf uart_settime ; set flag dcfsnz uart1_temp,F ; "c" bsf simulatormode_active ; set flag dcfsnz uart1_temp,F ; "d" bsf internal_eeprom_write ; set flag dcfsnz uart1_temp,F ; "e" bsf uart_send_hash ; set flag dcfsnz uart1_temp,F ; "f" bsf uart_reset_battery_stats ; set flag dcfsnz uart1_temp,F ; "g" bsf uart_send_int_eeprom ; set flag dcfsnz uart1_temp,F ; "h" bsf uart_reset_decodata ; set flag dcfsnz uart1_temp,F ; "i" bsf internal_eeprom_write2 ; set flag dcfsnz uart1_temp,F ; "j" bsf uart_send_int_eeprom2 ; set flag dcfsnz uart1_temp,F ; "k" bsf uart_store_tissue_data ; set flag dcfsnz uart1_temp,F ; "l" bsf uart_dump_screen ; set flag dcfsnz uart1_temp,F ; "m" bsf uart_send_int_eeprom3 ; set flag dcfsnz uart1_temp,F ; "n" bsf internal_eeprom_write3 ; set flag movlw 0xC1 cpfseq RCREG ; 115200Baud Bootloader request? bra uartint1 ; No bsf uart_115200_bootloader ; Yes, set Flag uartint1: movf RCREG,w ; unload RCREG in stand-alone simulator mode bcf PIR1,RCIF ; Clear flag bcf RCSTA,CREN ; Clear receiver status bsf RCSTA,CREN return simulator_int: movlw 'l' ; Received 'l' dump-screen command ? xorwf RCREG,W bnz simulator_int2 ; NO: skip bsf uart_dump_screen ; YES: set flag bra uartint1 ; and this is not a depth... simulator_int2: btfsc standalone_simulator ; ignore in standalone simulator mode bra uartint1 bsf LED_blue tstfsz RCREG ; =0x00? bra simulator_int1 ; No incf RCREG,F ; Yes, so force RCREG=1 simulator_int1: movf RCREG,w ; depth in m movwf PRODL ; Copy movlw d'140' ; Limit to 130m cpfslt PRODL ; compare with value in UART movwf PRODL ; Overwrite reading movf PRODL,w ; depth in m mullw d'100' ; result will be mbar movff PRODL,sim_pressure+0 ; stored for pressure overwrite movff PRODH,sim_pressure+1 bra uartint1 ; exit uart int ;============================================================================= switch_left_int: bcf INTCON,INT0IF ; Clear flag btfsc T0CON,TMR0ON ; Timer0 running? bra timer0_restart ; Yes, restart ; OSTC 2N has flipped screen and exchanged switches... movff win_flags,WREG ; Get into Bank0 btfss WREG,0 bsf switch_left ; Set flag, button press is OK btfsc WREG,0 bsf switch_right ; Set flag, button press is OK bsf T0CON,TMR0ON ; Start Timer 0 return switch_right_int: bcf INTCON3,INT1IF ; Clear flag btfsc T0CON,TMR0ON ; Timer0 running? bra timer0_restart ; Yes, restart ; OSTC 2N has flipped screen and exchanged switches... movff win_flags,WREG ; Get into Bank0 btfsc WREG,0 bsf switch_left ; Set flag, button press is OK btfss WREG,0 bsf switch_right ; Set flag, button press is OK bsf T0CON,TMR0ON ; Start Timer 0 return timer0_restart: bcf INTCON,TMR0IF ; Clear flag movlw T0CON_VALUE movwf T0CON ; Timer0 clrf TMR0H clrf TMR0L bsf T0CON,TMR0ON ; Start Timer 0 return timer0int: bcf INTCON,TMR0IF ; Clear flag bcf T0CON,TMR0ON ; Stop Timer 0 clrf TMR0H clrf TMR0L return ;============================================================================= ; timer1int: timer1int_debug: bcf LED_red ; LEDr off (For charge indicator) btfsc TMR1L,0 ; Wait for low clock cycle bra $-2 btfss TMR1L,0 ; Still high? bra $-2 ; max. loop time: 61µs movlw 0x08 ; Timer1 int after 62.5ms (=16/second) cpfslt TMR1H ; Did we miss a 1/16 second? incf timer1int_counter1,F ; Yes, add extra 1/16 second movlw 0x08 ; Timer1 int after 62.5ms (=16/second) subwf TMR1H,F bcf PIR1,TMR1IF ; Clear flag incf timer1int_counter1,F ; Increase timer1 counter movlw d'15' ; One second 16 cpfsgt timer1int_counter1 bra sensor_int_pre ; only pressure sensor rcall RTCisr ; adjust time, then query pressure sensor sensor_int_pre: btfsc sleepmode ; In sleepmode? return ; Yes ; Sensor interput do poll the presure/temperature sensor, download results, ; compute compensations, and store results in various shared variables. ; ; Input: interupt (every 62.5msec == 16Hz), sensor, ; last_surfpressure:2. ; ; Output: amb_pressure:2, ; temperature:2, ; rel_pressure:2, ; and the pressure_refresh flag. ; ; NOTE: averaging (4 successive value, as recommended in the MS5535 datasheet) ; is done on private variables, to avoid trashing data while reading it ; from the main code. ; ; NOTE: Because there is no atomic 16bits load/stores, we need to check twice ; the read data is correct. Ie. SAFE_2BYTE_COPY is mandatory to get ; amb_pressure, temperature or rel_pressure ; sensor_int: btfsc no_sensor_int ; No sensor interrupt (because it's addressed during sleep) return incf timer1int_counter2,F ; counts to eight for state maschine ; State 1: Clear flags and average registers, get temperature (51us) and start pressure integration (73,5us) ; State 2: Get pressure (51us), start temperature integration (73,5us) and calculate temperature compensated pressure (233us) ; State 3: Get temperature (51us) and start pressure integration (73,5us) ; State 4: Get pressure (51us), start temperature integration (73,5us) and calculate temperature compensated pressure (233us) ; State 5: Get temperature (51us) and start pressure integration (73,5us) ; State 6: Get pressure (51us), start temperature integration (73,5us) and calculate temperature compensated pressure (233us) ; State 7: Get temperature (51us) and start pressure integration (73,5us) ; State 8: Get pressure (51us), start temperature integration (73,5us), calculate temperature compensated pressure (233us) and build average for half-second update of tempperature and pressure movff timer1int_counter2,isr_divB ; isr_divB used as temp here... dcfsnz isr_divB,F bra sensor_int_state1_plus_restart ; Do State 1 dcfsnz isr_divB,F bra sensor_int_state2 ; Do State 2 dcfsnz isr_divB,F bra sensor_int_state1 ; Do State 3 dcfsnz isr_divB,F bra sensor_int_state2 ; Do State 4 dcfsnz isr_divB,F bra sensor_int_state1 ; Do State 5 dcfsnz isr_divB,F bra sensor_int_state2 ; Do State 6 dcfsnz isr_divB,F bra sensor_int_state1 ; Do State 7 ; bra sensor_int2_plus_average ; Do State 8 ;sensor_int2_plus_average: rcall sensor_int_state2 sensor_int2_plus_average2: bcf STATUS,C ; clear carry bit. rrcf amb_pressure_avg+1 ; amb_pressure sum / 2 rrcf amb_pressure_avg+0 bcf STATUS,C ; clear carry bit, twice. rrcf amb_pressure_avg+1 ; amb_pressure sum / 4 rrcf amb_pressure_avg+0 movff amb_pressure_avg+1,amb_pressure+1 ; copy into actual register movff amb_pressure_avg+0,amb_pressure+0 bcf STATUS,C btfsc temperature_avg+1,7 ; Copy sign bit to carry bsf STATUS,C rrcf temperature_avg+1 ; Signed temperature /2 rrcf temperature_avg+0 bcf STATUS,C btfsc temperature_avg+1,7 ; Copy sign bit to carry bsf STATUS,C rrcf temperature_avg+1 ; Signed temperature /4 rrcf temperature_avg+0 movff temperature_avg+1,temperature+1 movff temperature_avg+0,temperature+0 bsf pressure_refresh ; Set flag! Temp and pressure were updated! clrf timer1int_counter2 ; Then reset State counter btfss simulatormode_active ; are we in simulator mode? bra comp_air_pressure ; no comp_air_pressure0: movlw LOW d'1000' ; yes, so simulate 1bar surface pressure movwf last_surfpressure+0 movlw HIGH d'1000' movwf last_surfpressure+1 comp_air_pressure: movf last_surfpressure+0,W ; compensate airpressure subwf amb_pressure+0,W movwf rel_pressure+0 ; rel_pressure stores depth! movf last_surfpressure+1,W subwfb amb_pressure+1,W movwf rel_pressure+1 btfss STATUS,N ; result is below zero? return clrf rel_pressure+0 ; Yes, do not display negative depths clrf rel_pressure+1 ; e.g. when surface air pressure dropped during the dive return sensor_int_state1_plus_restart: clrf amb_pressure_avg+0 ; pressure average registers clrf amb_pressure_avg+1 clrf temperature_avg+0 clrf temperature_avg+1 sensor_int_state1: call get_temperature_value ; State 1: Get temperature call get_pressure_start ; and start pressure integration. return ; Done. sensor_int_state2: call get_pressure_value ; State2: Get pressure (51us) call get_temperature_start ; and start temperature integration (73,5us) goto calculate_compensation ; calculate temperature compensated pressure (233us) ;============================================================================= RTCisr: clrf timer1int_counter1 ; counts to 16 (one second / 62.5ms) bsf onesecupdate ; we have a new second! btfsc sleepmode ; are we in sleep mode? bra RTCisr0 ; Yes movlw .1 addwf on_time_seconds+0,F movlw .0 addwfc on_time_seconds+1,F addwfc on_time_seconds+2,F ; Increase counter RTCisr0: bcf STATUS,Z ; are we in dive mode? btfss divemode bra RTCisr2 ; No, must be surface or sleepmode incf samplesecs,F ; CF20 diving seconds done decf samplesecs_value,W ; holds CF20 value (minus 1 into WREG) cpfsgt samplesecs bra RTCisr1 ; no clrf samplesecs ; clear counter... bsf store_sample ; ...and set bit for profile storage RTCisr1: ; Increase re-setable average depth divetime counter incf average_divesecs+0,F ; increase stopwatch registers btfsc STATUS,Z incf average_divesecs+1,F ; increase stopwatch registers ; Increase total divetime (Regardless of CF01) incf total_divetime_seconds+0,F ; increase stopwatch registers btfsc STATUS,Z incf total_divetime_seconds+1,F ; increase stopwatch registers btfss divemode2 ; displayed divetime is running? bra RTCisr2 ; No (e.g. too shallow) ; increase divetime registers (Displayed dive time) incf divesecs,F movlw d'59' cpfsgt divesecs bra RTCisr1a clrf divesecs bsf realdive ; this bit is always set (again) if the dive is longer then one minute incf divemins+0,F ; increase divemins btfsc STATUS,Z incf divemins+1,F ; and now do the realtime clock routine anyway RTCisr1a: btfss FLAG_apnoe_mode ; Are we in Apnoe mode? bra RTCisr2 ; No, skip the following incf apnoe_secs,F ; increase descent registers movlw d'59' cpfsgt apnoe_secs bra RTCisr2 clrf apnoe_secs incf apnoe_mins,F ; increase descent mins ; Now, do the RTC routine.... RTCisr2: incf secs,F ; adjusts seconds, minutes, hours, day, month and year. Checks for a leap year and works until 2099! movlw d'60' cpfseq secs ; Secs == 60 ? return ; NO : done. clrf secs ; YES: increment minutes instead... bsf oneminupdate btfss divemode ; In Divemode? rcall check_nofly_desat_time ; No, so reduce NoFly and Desat and increase interval incf mins,F movlw d'59' cpfsgt mins return clrf mins incf hours,F movlw d'23' cpfsgt hours return clrf hours incf day,F movff time_correction_value,secs ; Correct too slow clock check_date: movff month,isr_divB ; new month? dcfsnz isr_divB,F movlw .31 dcfsnz isr_divB,F movlw .28 dcfsnz isr_divB,F movlw .31 dcfsnz isr_divB,F movlw .30 dcfsnz isr_divB,F movlw .31 dcfsnz isr_divB,F movlw .30 dcfsnz isr_divB,F movlw .31 dcfsnz isr_divB,F movlw .31 dcfsnz isr_divB,F movlw .30 dcfsnz isr_divB,F movlw .31 dcfsnz isr_divB,F movlw .30 dcfsnz isr_divB,F movlw .31 cpfsgt day,1 return movlw .1 movwf day incf month,F movlw .12 cpfsgt month,1 return movlw .1 movwf month incf year,F return check_nofly_desat_time: bcf nofly_active ; Clear flag movf nofly_time+0,W ; Is nofly null ? iorwf nofly_time+1,W bz check_nofly_desat_time2 ; yes... bsf nofly_active ; Set flag (again) movlw d'1' subwf nofly_time+0,F movlw d'0' subwfb nofly_time+1,F ; reduce by one check_nofly_desat_time2: movff desaturation_time_buffer+0,lo movff desaturation_time_buffer+1,hi movf lo,W ; Is Desat null ? iorwf hi,W bz check_nofly_desat_time3 ; yes... movlw d'1' subwf lo,F movlw d'0' subwfb hi,F ; reduce by one... movff lo,desaturation_time_buffer+0 ; ...and copy back movff hi,desaturation_time_buffer+1 check_nofly_desat_time3: ; Now increase interval timer movff desaturation_time_buffer+0,lo movff desaturation_time_buffer+1,hi tstfsz lo ;=0? bra calc_surface_interval2 ; No tstfsz hi ;=0? bra calc_surface_interval2 ; No clrf surface_interval+0 clrf surface_interval+1 ; Clear surface interval timer return ; Done. calc_surface_interval2: ; Increase surface interval timer movlw d'1' addwf surface_interval+0,F movlw d'0' addwfc surface_interval+1,F return ; Done