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Re: pic18f4331 update duty cycle,週期跟著改變?
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初級會員
 
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終於找到問題!
原來是AVdd,AVss和Vdd,Vss必須要個別接到電源端和地,否則靈異現象會非常的多
發表於: 2007/6/14 9:38
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Re: pic18f4331 update duty cycle,週期跟著改變?
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新會員
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據以往的經驗, 有可能是你的中斷時間太短, 而ISR做太多事情!
發表於: 2007/6/13 12:23
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Re: pic18f4331 update duty cycle,週期跟著改變?
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新會員
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據以往的經驗, 有可能是你的中斷時間太短, 而ISR做太多事情!
發表於: 2007/6/13 12:23
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pic18f4331 update duty cycle,週期跟著改變?
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初級會員
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請教一下各位大大,
我在main裡面有個 while(1) { TD_L=TARGET_DUTY; TD_H=(TARGET_DUTY>>8); TD_H=TD_H&0x3F; PDC0H=TD_H; PDC0L=TD_L; } duty cycle會在TMR0 的ISR中有變化,利用while(1)迴圈,我在ISR裡面只要更改TARET_DUTY值就可以修改PDC0H/L的值,但是問題是如果這樣做的話,似乎會影響到PTPERH/L的值,造成週期跟著改變,不曉得為什麼?
發表於: 2007/6/13 11:15
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