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Re: 關於RS232
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高級會員
 
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我找到問題了..(眼淚...)
搞了一個晚上... 問題出在我用20MHz的石英震盪..Config bit ..卻不小心設成 XT ...(泣.)..改成HS就OK了.... 總算搞定了..短短不到十行的程式.. 唉....
發表於: 2004/12/11 0:36
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Re: 關於RS232
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高級會員
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Please refer to "PICDEM 2" demo board.
You can find the schematic and sample code in ASM. Please find these files in www.microchip.com 
發表於: 2004/12/10 23:18
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關於RS232
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高級會員
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很抱歉..請問個小小的問題..
因為沒有玩過USART ..所以不知道怎ㄇ解決.. 我想用PIC的USART介面..跟PC的RS232做溝通.. PIC傳送一些簡單的ASCII Code ,PC 則用終端機軟體 來接收.. 可是我怎ㄇ街都沒反應..只好求助於各位了.. 我的硬體接線如下: PIC MAX232 COM1 ----------------------- TX -> RX RX <- TX GND ------- GND 請問降子接界可以了嗎..?還是有其他的控制訊號要處理ㄋ.? 附上我的程式: bank1 ;Macro movlw .129 ;20MHz , .129 = 9.6k movwf SPBRG bsf TXSTA,BRGH bcf TXSTA,SYNC ;ASYNC Mode bank0 ;Macro bsf RCSTA,SPEN bank1 ;Macro bcf TXSTA,TX9 bsf TXSTA,TXEN bcf TXSTA,TX9D bank0 ;Macro movlw 'A' movwf TXREG goto $ 終端機設定 COM1 9600 Bps, 8 bit, 無同位檢查, 1 Stop Bit, 硬體流量控制 不知道是不是個簡單的問題 因為東找西找就是找不到資料..請各位幫個忙..教一下吧... Ps..因為我是用組語來寫.請各位用組語的方式教我吧..謝謝.. 
發表於: 2004/12/10 22:46
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