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請問有關"SPI讀取16Bits資料"......???
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高級會員
 
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各位高手大家好.....
小弟我利用SPI來讀取某AD轉換IC的資料........ 因為是一次傳送16Bit.....所以有些問題.....>"< 如果我用PIR1.SSPIF來判斷傳輸是否完成...會進入無窮回圈.. Loop btfss PIR1, SSPIF bra Loop 我在想,應該是資料16Bit...而SSPBUF為8Bit...所以收不下來.. 所以SSPIF永遠為"0"......!!!! 如果我用SSPSTAT.BT來判斷....會發生收完第一次資料.... 再收第二次時會進入無窮迴圈..... Loop btfss SSPSTAT, BF bra Loop 因為要收16Bit資料....所以要收2次(SSPBUF=8Bit).... 當要收第二次時,BF就永遠為"0"... 所以就進入無窮回圈...>"< 請各位高手救救我阿......謝謝
發表於: 2006/8/14 13:59
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