MOVwf trisb
bcf option_reg,7 ; enable portb weak pullups
Bank_0
; configuration of analog comparators -------------------------------------------------------------
MOVlw b’00000110’ ; two common reference comparators with outputs
MOVwf cmcon
Bank_1
MOVlw b’11100110’ ; Vref = 1.25 volts, connected to RA2
MOVwf vrcon
Bank_0
; timer0 ------------------------------------------------------------------------------------------
Bank_1
MOVlw b’01000000’ ; timer0 internal clock, prescaler 1:2, enable portb weak pullups
MOVwf option_reg ;
Bank_0
; timer1 ------------------------------------------------------------------------------------------
MOVlw b’00110001’ ; prescaler = 8, internal clock, enabled
MOVwf t1con
;**************************************************************************************************
; Main program
;**************************************************************************************************
start
clrf FLAGS ; clear all flags
call copy_ee ; copy default eeprom values to RAM registers
main_loop
btfsc ATX_C_out ; check if ATX is standby
goto green ; on --> LED green
LED_red ; standby --> LED red
goto pwr_sw
green
LED_grn
pwr_sw
btfss PWRin ; test PWRin (active low)
goto pwr_sw_1 ; if low goto pwr_sw_1
btfss IR_C_out ; wait for high level at IR_C_out
goto main_loop ;
call rc5_rx ; call rc5_rx subroutine
btfsc RC5_Flag ; RC5 code OK?
goto main_loop ; no, goto main_loop
LED_off ; turn off green LED for 50ms each time a valid code
call delay_t4 ; has been received
LED_grn
pwr_key ; check if pwr key of remote control is pressed
MOVfw RC5_ADR ; load RC5_ADR into w
subwf PWR_KEY_ADR,w ;
btfss status,z ; does PWR_KEY_ADR match?
goto no_match ; - no, goto no_match
;
MOVfw RC5_CMD ; - yes, load RC5_CMD into w
andlw b’01111111’ ; and clear toggle bit
subwf PWR_KEY_CMD,w ;
btfss status,z ; does PWR_KEY_CMD match?
goto no_match ; - no, goto no_match
;
MOVfw RC5_CMD_TMP ; - yes, toggle bit also unchanged?
subwf RC5_CMD,w ;
btfss status,z ;
goto no_match ; - no, goto no_match
;
btfsc ATX_C_out ; activate PWRout only if ATX is standby to power up PC
goto vdr_pwr_down ; if on, VDR’s shutdown script will turn off PC
; ATX is standby, now check if pwr key of remote control is
; pressed long enough (approx. TurnOnDelay * 114ms)
incf KEYCOUNT,f ; - yes, unchanged, increment KEYCOUNT
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本文关键字：程序 PIC单片机，单片机-工控设备 - PIC单片机
