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Re: PIC18F2620/4620 with ZigBee MRF24J40的USART通訊
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版主
 
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這樣看程式很難找出這種不固定的 Bug，建議檢查一下 USART 的狀態旗號是不是有發生 Frame , Overflow 等錯誤，或著你可以用示波器配合中斷的 I/O 輸出訊號去判斷中斷程式的動作次數，也可以檢查一下 Timming 的資料與接收到的姿藥是否相符。
發表於: 2008/5/10 11:08
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PIC18F2620/4620 with ZigBee MRF24J40的USART通訊
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新會員
 
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小弟正將RS232通訊功能加入ZigBee firmware
我以interrupt routing server方式將RS232加入ZigBee中斷, 但是module在接收PC的RS232資料時 常常會發生掉Byte或接收成亂碼..... Ex,我要收19 10 38 30 17 卻常收成19 38 30 17或19 30 17或84 82 DA 拜託各位先進能幫幫忙, 以下是我的source code... #define CLOCK_FREQ 16000000 #define BAUD_RATE 115200 void ConsoleInit(void) { #if defined(USART_USE_BRGH_HIGH) TXSTA = 0x24; #else TXSTA = 0x20; #endif RCSTA = 0x90; SPBRG = SPBRG_VAL=0x08; } void UARTIntISR(void) { #if RXON { if(!vUARTIntStatus.UARTIntRxBufferFull && RCIF == 1) { vUARTIntStatus.UARTIntRxOverFlow = 0; vUARTIntStatus.UARTIntRxBufferEmpty = 0; vUARTIntRxBuffer[vUARTIntRxBufWrPtr] = RCREG; RCIF = 0; vUARTIntRxBufDataCnt ++; if(vUARTIntRxBufDataCnt == RS485_RX_BUFFER_SIZE) vUARTIntStatus.UARTIntRxBufferFull = 1; vUARTIntRxBufWrPtr++; if(vUARTIntRxBufWrPtr == RS485_RX_BUFFER_SIZE) vUARTIntRxBufWrPtr = 0; } } #endif } THX Earnie
發表於: 2008/5/10 2:02
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