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Thread Tools | Display Modes |
22nd June 2008, 12:27 PM
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Countdown timer + LCD + Keypad
Hi,
I am facing a problem in my programming. Any button press on the keypad didt display any character in the LCD. |
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22nd June 2008, 01:18 PM
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This is my countdown timer code. My keypad code is from nigel. If any key is press, will it go to the Hours?
countdown ;Secs S1 call Delay250 call Delay250 call Delay250 call Delay250 call Chk_Keys movf key, w movwf Hours movf Hours, w movwf NumL call DisplayH movlw ':' call LCD_Char movf Mins, w movwf NumL call DisplayM movlw ':' call LCD_Char movf Secs, w movwf NumL call DisplayS movf Secs,w btfss STATUS,Z goto cd_Secs call Display_Secs ;Mins movf Mins,w btfss STATUS,Z goto cd_Mins call Display_Mins ;Hours movf Hours,w btfss STATUS,Z goto cd_Hours call Display_Hours cd_Secs decf Secs, f goto S1 cd_Mins decf Mins, f goto S1 cd_Hours decf Hours, f goto S1 Display_Secs movlw d'59' movwf Secs return Display_Mins movlw d'59' movwf Mins return Display_Hours movlw d'00' movwf Hours return |
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