This thread has been locked.
If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
SciaRegs.SCICCR 的STOP BITS 设定为0时1个停止位时，通讯不正常；
设定为1时2个停止位，通讯正常，想问一下为什么？
您好！
请参考TI的F28035的官方历程，就用的是1个停止位
void scia_fifo_init()
{
SciaRegs.SCICCR.all =0x0007; // 1 stop bit, No loopback
// No parity,8 char bits,
// async mode, idle-line protocol
SciaRegs.SCICTL1.all =0x0003; // enable TX, RX, internal SCICLK,
// Disable RX ERR, SLEEP, TXWAKE
SciaRegs.SCICTL2.bit.TXINTENA =1;
SciaRegs.SCICTL2.bit.RXBKINTENA =1;
SciaRegs.SCIHBAUD = 0x0000;
SciaRegs.SCILBAUD = SCI_PRD;
SciaRegs.SCICCR.bit.LOOPBKENA =0; // Enable loop back
SciaRegs.SCIFFTX.all=0xC000;
SciaRegs.SCIFFRX.all=0x0028;
SciaRegs.SCIFFCT.all=0x00;
SciaRegs.SCICTL1.all =0x0023; // Relinquish SCI from Reset
SciaRegs.SCIFFTX.bit.SCIRST=1;
SciaRegs.SCIFFTX.bit.TXFIFOXRESET=1;
SciaRegs.SCIFFRX.bit.RXFIFORESET=1;
}
SciaRegs.SCICCR.all =0x0087; // 2 stop bit, No loopback
// no parity,8 char bits,
SciaRegs.SCICTL1.all =0x0007; // enable TX, RX, internal SCICLK,
SciaRegs.SCILBAUD = 0x0060;
// SciaRegs.SCICCR.bit.LOOPBKENA =1; // Enable loop back
SciaRegs.SCIFFTX.all=0xC028;
SciaRegs.SCIFFRX.all=0x0021;
上面的程序能正常工作
SciaRegs.SCICCR.all =0x0007; // 1stop bit, No loopback
改成一个停止位就不行，为什么？
interrupt void sciaTxFifoIsr(void)
Uint16 i;
EINT;
if(SdataA_Num<=16)
for(i=0; i< SdataA_Num; i++)
while (SciaRegs.SCIFFTX.bit.TXFFST != 0){}
SciaRegs.SCITXBUF=SdataA[i]; // Send data
EDIS; // This is needed to disable write to EALLOW protected registers
PieCtrlRegs.PIEIER9.bit.INTx2=0; // PIE Group 9, INT2
SciaRegs.SCIFFTX.bit.TXFFINTCLR=1; // Clear SCI Interrupt flag
PieCtrlRegs.PIEACK.all|=0x100; // Issue PIE ACK
SdataA_Num = 7 ，我上位机只能收到5个字节，CRC校验的字节丢失。
用历程也不行么？
历程一个停止位是没问题的，我以上两个程序，只相差SciaRegs.SCICCR.all =0x0007; SciaRegs.SCICCR.all =0x0087; 一个停止位，一个能工作，一个不能工作，很奇怪
原因找到了，是因为接受中断函数中SciaRegs.SCICTL1.bit.SWRESET=1;引起的，注释掉后，正常了
