最近在做基于TMS320F28335的运动控制。其中用到了28335的一些外设模块：SCI、ePWM、eQEP/AD等。为了以后能够有个回顾的地方，将学习过程中一些流程记录下来。 一、SCI串口通信相关配置流程与内容（中断方式） Step1:初始化GPIO     InitSciGpio(); //只需设置SCIC和SCIB Step2:初始化PIE中断向量表，（使用中断方式接收上位机数据）     EALLOW;   //寄存器EALLOW保护     PieVectTable.SCIRXINTC=&scicRxFifoIsr;//初始化PIE中断向量表     // PieVectTable.SCITXINTC=&scicTxFifoIsr;     EDIS;   //禁止写如EALLOW保护的寄存器 Step3:初始化SCI SciSetup(); void SciSetup() { //SCIA设置        // Note: Clocks were turned on to the SCIC peripheral         // in the InitSysCtrl() function     ScicRegs.SCICCR.all =0x0007;  // 1 stop bit,  No loopback                                       // No parity,8 char bits,                                       //async mode, idle-line protocol     ScicRegs.SCICTL1.all =0x0003; // enable TX, RX, internal SCICLK,                                       // Disable RX ERR, SLEEP, TXWAKE     //ScicRegs.SCICTL2.all =0x0003;     ScicRegs.SCICTL2.bit.TXINTENA = 1;     ScicRegs.SCICTL2.bit.RXBKINTENA =1;     #if (CPU_FRQ_150MHZ)     ScicRegs.SCIHBAUD    =0x0001; // 9600baud @LSPCLK = 37.5MHz.     ScicRegs.SCILBAUD    =0x00E7;     #endif     #if (CPU_FRQ_100MHZ)      ScicRegs.SCIHBAUD    =0x0001; //9600 baud @LSPCLK = 20MHz.     ScicRegs.SCILBAUD    =0x0044;     #endif //中断寄存器配置     ScicRegs.SCIFFTX.all=0x8000;     ScicRegs.SCIFFRX.all=0x0028;      ScicRegs.SCIFFCT.all=0x0;     ScicRegs.SCICTL1.all =0x0023; // Relinquish SCI from Reset       ScicRegs.SCIFFTX.bit.TXFIFOXRESET=1;     ScicRegs.SCIFFRX.bit.RXFIFORESET=1;   } //SCIC接收中断服务程序 interrupt void scicRxFifoIsr(void) {     PieCtrlRegs.PIEACK.all=PIEACK_GROUP8;//第八组中断响应     ReceivedChar = ScicRegs.SCIRXBUF.all;       ScicRegs.SCIFFRX.bit.RXFIFORESET=0;//复位FIFO     ScicRegs.SCIFFRX.bit.RXFIFORESET=1;// 使能FIFO     ScicRegs.SCIFFRX.bit.RXFFOVRCLR=1;//清除溢出标志     ScicRegs.SCIFFRX.bit.RXFFINTCLR=1;//清除中断标志 } Step4：使能所需的中断 //使能所需的中断     PieCtrlRegs.PIECTRL.bit.ENPIE=1;//使能PIE模块 //SCI-C     PieCtrlRegs.PIEIER8.bit.INTx5=1;//PIE Group8，SCIRXINTC.     // PieCtrlRegs.PIEIER8.bit.INTx6=1;//PIEGroup8，SCITXINTC     IER|= M_INT8;// 使能CPU的第八组中断--SCIC中断