chk_low
btfsc PWRin ; still low?
goto vdr_pwr_down ; if not, pwr key was pressed < 5s --> turn off VDR
btfsc tmr1h,7 ; check timer1 h register bit 7 (set after 262ms)
goto dec_cnt1
goto chk_low
dec_cnt1
clrf tmr1h ; clear timer1 registers
clrf tmr1l
decfsz COUNT,f
goto chk_low ; not yet 5s, loop
goto reset ; power key pressed > 5s
turn_on
bsf PWRout ; activate PWRout for 250ms
call delay_t6 ;
bcf PWRout ;
goto boot_delay ; and goto boot_delay
reset bsf RESETout ; activate RESETout for 250ms
call delay_t6
bcf RESETout
boot_delay ; variable delay from 0 to 127 s while LED is flashing green
MOVfw PWR_ON_DELAY ; and no command is accepted, delay derived from user preset (0..99)
btfsc Reboot_Flag ; add additional time (defined in RebootDelay) if Reboot_Flag is set
addlw RebootDelay ;
MOVwf COUNT
bcf status,c
rlf COUNT ; multiply COUNT by two as the g_flash routine takes only 0.5s
sublw d’0’ ; if COUNT=0 stop immediately
btfss status,z
goto g_flash
bcf Reboot_Flag ; clear Reboot_Flag
goto main_loop
g_flash
LED_grn
call delay_t6
LED_off
call delay_t6
decfsz COUNT,f
goto g_flash
goto main_loop
vdr_pwr_down
LED_red ; turn LED red
MOVlw h’1f’ ; set RC5 address to h’1f’ and command to h’3e’ and send the code
MOVwf RC5_TX_2 ; This combination is not used by the remote control and will
MOVlw h’3e’ ; be send to LIRC instead of the remote’s normal pwr key code.
MOVwf RC5_TX_1 ; This way exactly *one* command CAN be sent instead of multiple
; (autorepeat of RC5 codes) -- VDR would start and immediately
; abort the shutdown if the pwr key is pressed a bit too long ...
; A corresponding entry must be added to lircd.conf and the
; original pwr key code must be reMOVed.
call rc5_tx ;
; Flash red LED while checking if a key on the remote control is
; pressed (which stops VDR from executing the shutdown script).
; If so, the programm returns to the main loop and the LED
; turns green again. Otherwise flash LED until ATX is in standby
; and finally turn LED red. Note: The remote’s pwr key will be
; ignored (also to avoid problem with RC5/repeat and VDR).
MOVlw d’57’ ; set COUNT to d’57’ for timeout couter
MOVwf COUNT ; timeout is approx. 2 * 262ms * 57 = 30 seconds
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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
