【DSP】TMS320F28035 SCI例程（自发自收+查询）

#include "DSP28x_Project.h"     // Device Headerfile and Examples Include Filevoid scia_loopback_init(void);void scia_fifo_init(void);void error();Uint16 LoopCount;Uint16 ErrorCount;Uint16 SendChar;Uint16 ReceivedChar;void main(void){    InitSysCtrl();    InitSciGpio();//初始化SCI引脚    DINT;    IER = 0x0000;    IFR = 0x0000;    InitPieVectTable();    PieCtrlRegs.PIECTRL.bit.ENPIE = 1;//使能PIE    PieCtrlRegs.PIEACK.all = 0xFFFF;//写1清零，允许所有PIE都能被响应    EINT;//开启总中断    LoopCount = 0;    ErrorCount = 0;    scia_fifo_init();      // Initialize the SCI FIFO    scia_loopback_init();  // Initalize SCI for digital loop back    SendChar = 0;    for(;;)    {       DELAY_US(1000000);       //将要发送的数据存入SCITXBUF       SciaRegs.SCITXBUF = SendChar;       //等待发送完成       while(SciaRegs.SCIFFRX.bit.RXFFST !=1) { } // wait for RRDY/RXFFST =1 for 1 data available in FIFO       //存储接收数据       ReceivedChar = SciaRegs.SCIRXBUF.all;       //自检       if(ReceivedChar != SendChar) error();       //发送的数据       SendChar++;       // Limit the character to 8-bits       SendChar &= 0x00FF;       LoopCount++;    }}// Step 7. Insert all local Interrupt Service Routines (ISRs) and functions here:void error(){      ErrorCount++;}// Test 1,SCIA  DLB, 8-bit word, baud rate 0x000F, default, 1 STOP bit, no parityvoid scia_loopback_init(){    SciaRegs.SCICCR.all =0x0007;   // 1 stop bit,  No loopback    //配置通讯协议                               // 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.all =0x0003;    SciaRegs.SCICTL2.bit.TXINTENA =1;    SciaRegs.SCICTL2.bit.RXBKINTENA =1;    SciaRegs.SCIHBAUD    =0x0000;    SciaRegs.SCILBAUD    =0x000F;    SciaRegs.SCICCR.bit.LOOPBKENA =1; // Enable loop back    SciaRegs.SCICTL1.all =0x0023;     // Relinquish SCI from Reset}// Initalize the SCI FIFOvoid scia_fifo_init(){    SciaRegs.SCIFFTX.all=0xE040;    SciaRegs.SCIFFRX.all=0x2044;    SciaRegs.SCIFFCT.all=0x0;}