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LIN的自动波特率问题 sos
大神们好!按照PIC16F18系列自动波特率的时序,在LIN_RX_IDLE里面,ABD使能,在LIN_RX_SYNC里面,读一次RC1REG将RCIF置0,波特率自动填充SP1BRG里面。现在在LIN_RX_SYNC里面,SPIBRG的值读出是对的,但是程序跳到LIN_RX_PID里面,读出PID报错,数据为0。请大神们指点,谢谢!case LIN_RX_IDLE: if(EUSART1_is_rx_ready() > 0){ //Start Timer LIN_startTimer(READ_TIMEOUT); LIN_rxInProgress = true; LIN_rxState = LIN_RX_BREAK; BAUD1CONbits.ABDEN = 1;//set auto baud detection } break; case LIN_RX_BREAK: if(EUSART1_is_rx_ready() > 0){ if(LIN_breakCheck() == true){ //Read Break LIN_rxState = LIN_RX_SYNC; } else { LIN_rxState = LIN_RX_ERROR; } } break; case LIN_RX_SYNC: if(EUSART1_is_rx_ready() > 0){ while (BAUDCONbits.ABDEN == 1) { if (BAUDCONbits.ABDOVF == 1) { BAUDCONbits.ABDEN = 0; // abort auto baud BAUDCONbits.ABDOVF = 0; // start auto baud BAUDCONbits.ABDEN = 1; // restart auto baud } } index = EUSART1_Read(); RC1REG_DATA=RC1REG; if((SP1BRGL+(SP1BRGH<<8))>0) { LIN_rxState = LIN_RX_PID; }else { LIN_rxState = LIN_RX_ERROR; } } break;
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