r_flash
LED_red ; turn on red LED
call tim_sub ; call timer subroutine and check if any remote key is pressed
LED_off ; turn off LED
call tim_sub ; call timer subroutine and check if any remote key is pressed
decfsz COUNT,f
goto r_flash ; and loop
goto main_loop ; timeout after approx. 30 seconds (if shutdown fails)
tim_sub ;
clrf tmr1h ; clear timer1 registers
clrf tmr1l ;
ir_chk
btfss IR_C_out ; high level at IR?
goto tim_chk ; - no, check timer1
call rc5_rx ; - yes, call rc5_rx subroutine
btfsc RC5_Flag ; RC5 code OK?
goto tim_chk ; - no, check timer1
MOVfw RC5_CMD ; copy RC5_CMD to w and
andlw b’01111111’ ; clear toggle bit
bcf status,c ; clear carry bit
subwf PWR_KEY_CMD,w ; check if command is pwr key; this will be ignored
btfss status,z ;
goto main_loop ; key pressed, abort shutdown and goto main_loop
tim_chk ;
btfss tmr1h,7 ; check timer1 h register bit 7 (set after 262ms)
goto ir_chk ; loop if not yet set
atx_chk
btfsc ATX_C_out ; wait until ATX is standby
return ; still on, continue flashing
goto main_loop ; now standby, goto main_loop
;**************************************************************************************************
; Program mode
;**************************************************************************************************
pgm_mode
MOVlw d’4’
MOVwf COUNT
rg_flash
LED_red ; flash bicolor LED aLTErnately green/red
call delay_t6 ; (either for 250 ms) 4 times to indicate
LED_grn ; that the program mode has been entered
call delay_t6
decfsz COUNT
goto rg_flash
LED_off ; now ready to learn codes (LED off)
learn_1
call ir_chk1 ; wait for high level at IR_C_out, timeout if idle for > 5s
call rc5_rx ; call rc5_rx subroutinee
btfsc RC5_Flag ; RC5 code OK?
goto learn_1 ; no, try again
MOVfw RC5_CMD ; copy RC5_CMD to w and
andlw b’01111111’ ; clear toggle bit
MOVwf TMP1 ; copy to TMP1 and TMP2
MOVwf TMP2 ;
bsf status,c ; check if command is 0...9
sublw d’9’
btfss status,c
goto learn_1 ; no, try again
LED_grn ; turn on green LED for 250ms if a
call delay_t6 ; valid code has been received
LED_off
MOVfw RC5_CMD ; copy RC5_CMD to temporary register
MOVwf RC5_CMD_TMP ; for the next toggle bit comparison
bcf status,c ; multiply TMP1 by 10
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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
