你好
我想同时使用TMS320F2800132的SCI_A和SCI_B两个串口，我的配置代码如下，但是只有SCI_A能正常工作，如果您知道原因，希望能得到您的解答，感谢！！
void InitSci(void)
{
EALLOW;
GpioCtrlRegs.GPAGMUX2.bit.GPIO28 = 0;
GpioCtrlRegs.GPAMUX2.bit.GPIO28 = 1;
GpioCtrlRegs.GPAPUD.bit.GPIO28 = 0;
GpioCtrlRegs.GPAQSEL2.bit.GPIO28 = 3;
GpioCtrlRegs.GPAAMSEL.bit.GPIO28 = 0;
GpioCtrlRegs.GPAGMUX2.bit.GPIO29 = 0;
GpioCtrlRegs.GPAMUX2.bit.GPIO29 = 1;
GpioCtrlRegs.GPAPUD.bit.GPIO29 = 0;
EDIS;
EALLOW;
SciaRegs.SCICTL1.bit.SWRESET = 0;
SciaRegs.SCICCR.all = 0x0007;
SciaRegs.SCICTL1.all = 0x0003;
SciaRegs.SCICTL2.bit.TXINTENA = 1;
SciaRegs.SCICTL2.bit.RXBKINTENA = 1;
SciaRegs.SCIHBAUD.bit.BAUD = 0x0000;
SciaRegs.SCILBAUD.bit.BAUD = 0x001A; // 100 MHz SYSCLK 0x1A
SciaRegs.SCIFFTX.bit.SCIRST = 1;
SciaRegs.SCIFFTX.bit.SCIFFENA = 1;
SciaRegs.SCIFFTX.bit.TXFFST = 0;
SciaRegs.SCIFFTX.bit.TXFFIENA = 1;
SciaRegs.SCIFFTX.bit.TXFFIL = 0;
SciaRegs.SCIFFRX.bit.RXFFOVRCLR = 1;
SciaRegs.SCIFFRX.bit.RXFFST = 0;
SciaRegs.SCIFFRX.bit.RXFFIENA = 1;
SciaRegs.SCIFFRX.bit.RXFFIL = 1;
SciaRegs.SCIFFCT.all = 0x00;
SciaRegs.SCIFFTX.bit.TXFIFORESET = 1;
SciaRegs.SCIFFRX.bit.RXFIFORESET = 1;
SciaRegs.SCICTL1.bit.SWRESET = 1;
EDIS;
//-------------SCI_B-------------------------------------------------------
EALLOW;
GpioCtrlRegs.GPAGMUX2.bit.GPIO18 = 0;
GpioCtrlRegs.GPAMUX2.bit.GPIO18 = 2;
GpioCtrlRegs.GPAPUD.bit.GPIO18 = 0;
GpioCtrlRegs.GPAQSEL2.bit.GPIO18 = 3;
GpioCtrlRegs.GPAGMUX2.bit.GPIO19 = 0;
GpioCtrlRegs.GPAMUX2.bit.GPIO19 = 2;
GpioCtrlRegs.GPAPUD.bit.GPIO19 = 0;
EDIS;
EALLOW;
ScibRegs.SCICTL1.bit.SWRESET = 0;
ScibRegs.SCICCR.all = 0x0007;
ScibRegs.SCICTL1.all = 0x0003;
ScibRegs.SCICTL2.bit.TXINTENA = 1;
ScibRegs.SCICTL2.bit.RXBKINTENA = 1;
ScibRegs.SCIHBAUD.bit.BAUD = 0x0000;
ScibRegs.SCILBAUD.bit.BAUD = 0x001A; // 100 MHz SYSCLK 0x1A
ScibRegs.SCIFFTX.bit.SCIRST = 1;
ScibRegs.SCIFFTX.bit.SCIFFENA = 1;
ScibRegs.SCIFFTX.bit.TXFFST = 0;
ScibRegs.SCIFFTX.bit.TXFFIENA = 1;
ScibRegs.SCIFFTX.bit.TXFFIL = 0;
ScibRegs.SCIFFRX.bit.RXFFOVRCLR = 1;
ScibRegs.SCIFFRX.bit.RXFFST = 0;
ScibRegs.SCIFFRX.bit.RXFFIENA = 1;
ScibRegs.SCIFFRX.bit.RXFFIL = 1;
ScibRegs.SCIFFCT.all = 0x00;
ScibRegs.SCIFFTX.bit.TXFIFORESET = 1;
ScibRegs.SCIFFRX.bit.RXFIFORESET = 1;
ScibRegs.SCICTL1.bit.SWRESET = 1;
EDIS;
}
