28377SCIC模块帧格式错误

调试28377的通信模块，使用scib发送数据，scia和scic接收数据。接收数据使用中断模式，scia可以接收到正确数据，scic接收数据会发生帧格式错误（读取scic的SCIRXBUF.all寄存器的数值是-32768）。scia和scic的模块配置完全一样，调整波特率后也发生同样错误，请问是怎么回事？需要怎么调整？

Susan Yang：

请问您使用的是官方开发板，launchpad还是controlcard？能否给出工程代码？谢谢

,

keliang yao：

遇到同样的问题
同样的配置，SCIA和SCIB可以正常工作，但是SCIC和SCID却不能正常工作
//
// Defines
//
#define SCIC_CPU_FREQ200E6
#define SCIC_LSPCLK_FREQSCIC_CPU_FREQ/4
#define SCIC_SCI_FREQ192E2
#define SCIC_SCI_PRD(SCIC_LSPCLK_FREQ/(SCIC_SCI_FREQ*8))-1

void scic_init()
{uint16_t BRR = SCIC_SCI_PRD;ScicRegs.SCICCR.all = 0x0007;// 1 stop bit,No loopback// No parity,8 char bits,// async mode, idle-line protocolScicRegs.SCICTL1.all = 0x0003;// enable TX, RX, internal SCICLK,// Disable RX ERR, SLEEP, TXWAKEScicRegs.SCICTL2.bit.TXINTENA = 0;ScicRegs.SCICTL2.bit.RXBKINTENA = 1;ScicRegs.SCIHBAUD.all = (uint8_t)(BRR >> 8);ScicRegs.SCILBAUD.all = (uint8_t)(BRR >> 0);
ScicRegs.SCICCR.bit.LOOPBKENA = 0; // Enable loop backScicRegs.SCIFFTX.all = 0xC020;ScicRegs.SCIFFRX.all = 0x0020;ScicRegs.SCIFFCT.all = 0x00;
ScicRegs.SCICTL1.all = 0x0023;// Relinquish SCI from ResetScicRegs.SCIFFTX.bit.TXFIFORESET = 1;ScicRegs.SCIFFRX.bit.RXFIFORESET = 1;
}

//
// scicTxFifoIsr – SCIC Transmit FIFO ISR
//
interrupt void scicTxFifoIsr(void)
{if(comm.txpos < comm.txlen){ScicRegs.SCITXBUF.all = comm.txbuf[comm.txpos++];}else{while(ScicRegs.SCICTL2.bit.TXEMPTY == 0);ScicRegs.SCICTL1.bit.TXENA = 0;ScicRegs.SCICTL1.bit.RXENA = 1;ScicRegs.SCICTL2.bit.TXINTENA = 0;ScicRegs.SCICTL2.bit.RXBKINTENA = 1;comm.txpos = 0;comm.txlen = 0;}
ScicRegs.SCIFFTX.bit.TXFFINTCLR = 1;// Clear SCI Interrupt flagPieCtrlRegs.PIEACK.all |= 0x080;// Issue PIE ACK
}

//
// scicRxFifoIsr – SCIC Receive FIFO ISR
//
interrupt void scicRxFifoIsr(void)
{sFifoIn(&fifo, (uint8_t)(ScicRegs.SCIRXBUF.all));
ScicRegs.SCIFFRX.bit.RXFFOVRCLR = 1;// Clear Overflow flagScicRegs.SCIFFRX.bit.RXFFINTCLR = 1;// Clear Interrupt flag
PieCtrlRegs.PIEACK.all |= 0x080;// Issue PIE ack
}
以上是SCIC的配置初始化函数和中断函数，请教哪里有问题，该怎么解决？