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Re: 請教跑馬燈的程式...
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版主
 
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看起來程式鷹沒有問題，只跑一次的問題應該是ICD2用了RB6 & RB7 的 resource。
1. 改用Progromming Mode, 用 Stand alone Mode跑跑看。 2. PICDEM 2 Plus 只有4顆LED那就修改程式的判斷 rlf PORTB,F btfss PORTB,4 goto LED_Next goto LED_Start
發表於: 2005/3/8 20:50
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請教跑馬燈的程式...
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中級會員
 
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大家好 我的程式出一點問題 出來的結果應該要是每200ms的跑馬燈，但是結果出來只跑了一次，並沒循環。我使用16F873A，DEMO BOARD是PICDEM 2 PLUS，使用ICD 2
以下是我的程式，謝謝： start: banksel TRISB ; Set PORTD for output port movlw b'00000000' movwf TRISB banksel PORTB movlw b'00011000' movwf STATUS ; LED_Start bcf STATUS,C movlw b'00000001' movwf PORTB LED_Next call delay_200ms rlf PORTB btfss STATUS,C goto LED_Next goto LED_Start ; ;--------- 200 md delay routine -------- ; delay_200ms: movlw VAL_200MS movwf count_200ms loop_20ms call delay_10ms decfsz count_200ms,F goto loop_20ms return ; ;-------- 10 ms delay routine ---------- ; delay_10ms: movlw VAL_10MS movwf count_10ms loop_ms call delay_500us decfsz count_10ms,F goto loop_ms return ; ;-------- 0.5 ms delay routine ----------- ; delay_500us: movlw VAL_500US movwf count_us dec_loop nop nop nop nop nop decfsz count_us,F goto dec_loop return ; end
發表於: 2005/3/8 16:40
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