142 lines
3.2 KiB
NASM
142 lines
3.2 KiB
NASM
; ***************************************************************************
|
|
; copyright : (C) 2023 by Martin Preuss
|
|
; email : martin@libchipcard.de
|
|
;
|
|
; ***************************************************************************
|
|
; * This file is part of the project "AqHome". *
|
|
; * Please see toplevel file COPYING of that project for license details. *
|
|
; ***************************************************************************
|
|
|
|
|
|
; doesn't work, yet
|
|
|
|
|
|
|
|
; ***************************************************************************
|
|
; data
|
|
|
|
.dseg
|
|
|
|
|
|
.equ CNY70_FLAGS_ADC_STARTED = 0x01
|
|
.equ CNY70_FLAGS_ADC_UPDATED = 0x02
|
|
|
|
cny70DataBegin:
|
|
cny70Flags: .byte 1
|
|
cny70LastData: .byte 1
|
|
cny70DataEnd:
|
|
|
|
|
|
|
|
|
|
; ***************************************************************************
|
|
; code
|
|
|
|
.cseg
|
|
|
|
|
|
|
|
; ---------------------------------------------------------------------------
|
|
; Init module.
|
|
;
|
|
; IN:
|
|
; - nothing
|
|
; OUT:
|
|
; - CFLAG: set if okay, clear on error
|
|
; USED:
|
|
|
|
CNY70_Init:
|
|
; preset SRAM data area
|
|
ldi xh, HIGH(cny70DataBegin)
|
|
ldi xl, LOW(cny70DataBegin)
|
|
clr r16
|
|
ldi r17, (cny70DataEnd-cny70DataBegin)
|
|
rcall Utils_FillSram
|
|
|
|
; setup pins
|
|
sbi CNY70_LED_DDR, CNY70_LED_PIN ; set DATA port as output
|
|
sbi CNY70_LED_PORT, CNY70_LED_PIN ; LED off
|
|
cbi CNY70_ADC_PORT, CNY70_ADC_PIN ; disable internal pullup for ADC
|
|
cbi CNY70_ADC_DDR, CNY70_ADC_PIN ; set ADC port as input
|
|
|
|
ldi r16, CNY70_ADC_MUX ; select input pin, use Vcc as reference voltage
|
|
out ADMUX, r16
|
|
ldi r16, (1 << ADLAR)
|
|
out ADCSRB, r16
|
|
ldi r16, (1 << ADEN) | (1 << ADPS1) | (1 << ADPS0) ; enable, prescaler 8
|
|
out ADCSRA, r16
|
|
|
|
sec
|
|
ret
|
|
|
|
|
|
|
|
CNY70_Fini:
|
|
sec
|
|
ret
|
|
|
|
|
|
|
|
CNY70_Run:
|
|
lds r16, cny70Flags
|
|
andi r16, CNY70_FLAGS_ADC_UPDATED ; new value?
|
|
breq CNY70_Run_done ; nope, jump
|
|
rcall CNY70_SendAdc ; send value
|
|
brcc CNY70_Run_done ; jump on error
|
|
lds r16, cny70Flags ; value sent, clear flag
|
|
andi r16, ~CNY70_FLAGS_ADC_UPDATED
|
|
sts cny70Flags, r16
|
|
CNY70_Run_done:
|
|
clc
|
|
ret
|
|
|
|
|
|
|
|
CNY70_OnTimer:
|
|
lds r16, cny70Flags
|
|
andi r16, CNY70_FLAGS_ADC_STARTED
|
|
breq CNY70_OnTimer_startConversion
|
|
; conversion is running, complete?
|
|
sbic ADCSRA, ADSC
|
|
ret ; only if bit still set
|
|
|
|
; conversion complete, read value, set flags
|
|
lds r16, cny70Flags
|
|
andi r16, ~CNY70_FLAGS_ADC_STARTED
|
|
ori r16, CNY70_FLAGS_ADC_UPDATED
|
|
sts cny70Flags, r16
|
|
in r16, ADCH ; read value from ADC
|
|
sts cny70LastData, r16
|
|
sbi CNY70_LED_PORT, CNY70_LED_PIN ; LED off
|
|
nop
|
|
nop
|
|
nop
|
|
ret
|
|
|
|
CNY70_OnTimer_startConversion:
|
|
cbi CNY70_LED_PORT, CNY70_LED_PIN ; LED on
|
|
lds r16, cny70Flags
|
|
ori r16, CNY70_FLAGS_ADC_STARTED
|
|
sts cny70Flags, r16
|
|
sbi ADCSRA, ADSC ; start conversion
|
|
ret
|
|
|
|
|
|
|
|
CNY70_SendAdc:
|
|
ldi r16, 0xff ; destination address
|
|
ldi r17, VALUE_ID_ADC ; value id
|
|
ldi r22, AQHOME_VALUETYPE_UNKNOWN
|
|
lds r18, cny70LastData ; value
|
|
clr r19
|
|
ldi r20, 1 ; denominator
|
|
clr r21
|
|
ldi xl, LOW(com2SendBuffer)
|
|
ldi xh, HIGH(com2SendBuffer)
|
|
rcall CPRO_WriteReportValue
|
|
rjmp COM2_SendPacket
|
|
|
|
|
|
|
|
|