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Re: SPI範例問題
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資深會員
 
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請參考此篇
http://www.microchip.com.tw/modules/n ... t_id=26146#forumpost26146 雖然版主Ryang 依datasheet上寫的認為寫入時應該檢查 IF旗標 不過個人還是認為要檢查BF較好 你可參考多方測試看看 不過我的經驗是在PIC18上面, dsPIC上未曾了解過，故僅供參考!!!
發表於: 2009/10/12 10:19
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SPI範例問題
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新會員
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unsigned char SPI_ByteWrite(unsigned char SPI_DATA )
{ int Dummy ; SPI1BUF = SPI_DATA ; while ( ! IFS0bits.SPI1IF ) ; IFS0bits.SPI1IF = 0 ; for ( WaitLoop = 0 ; WaitLoop < 50 ; WaitLoop ++ ) ; return (unsigned char) SPI1BUF ; } 如上之程式,長時間測試會遇到while ( ! IFS0bits.SPI1IF ) ; 一直等不到 IFS0bits.SPI1IF =1 的時後會造成程式當在此行, 請問如何處理較好?
發表於: 2009/10/12 9:50
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