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Re: MPLAB C18的使用
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版主
 
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master 大大已經告訴你了，找找看是不是少了一個 s 。
另外你有用 include 將相對應元件的 H 檔加進來嗎?
發表於: 2008/1/16 13:45
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Re: MPLAB C18的使用
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資深會員
 
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'PORTAbit' has not been defined
^^^^^^錯誤訊息告訴你打錯字了...
發表於: 2008/1/16 12:18
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不要問我哪裡來，我只是個流浪天涯的工程師
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Re: MPLAB C18的使用
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新會員
 
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多谢您的帮助!!!D:\My Project\Second\main.c:158:Error [1105] symbol 'PORTAbit' has not been defined
D:\My Project\Second\main.c:158:Error [1105] symbol 'RA3' has not been defined D:\My Project\Second\main.c:158:Error [1101] lvalue required,不可以啊编译有错
發表於: 2008/1/16 11:42
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Re: MPLAB C18的使用
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版主
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RA3 這隻腳通常都有ADC與 Comparator 的功能，所以要將 RA3 當作 I/O 功能的話，第一步就是要先 Disable RA3 AD輸入與Comparator的功能。disable analog function 後就可以這樣寫:
#define LED PORTAbits,RA3 TRISAbits.TRISA3 = 0 ; Setc RA3 as output LED = 1; Set RA3 = 1
發表於: 2008/1/16 10:23
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MPLAB C18的使用
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新會員
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我想在C18编译器下,把PORTA的RA3引脚指定为led_green,要怎么定啊!请高手帮忙一下,不要用define,最好是使用volatile
發表於: 2008/1/15 17:34
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