(5) DSP28335--SCI

 (2016-07-01 22:39:13)   分类： DSP学习 对于28335---SCI编程例程 1  SCI模块初始化(主频100M) 在main函数的初始化外设中设置SCI模块，这里使用SCIA仅用于接收； SCIC采用中断接收，定时发送；   //---------------------------------------------------------- 使能SCI外设时钟 {    SysCtrlRegs.PCLKCR0.bit.SCIAENCLK = 1;   // SCI-A    SysCtrlRegs.PCLKCR0.bit.SCICENCLK = 1;   // SCI-A } //-----------------------------------------------------------  //设置SCI模块 void InitSCI() { ////SCIC    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.bit.TXINTENA =1;//enable TXRDY isr    ScicRegs.SCICTL2.bit.RXBKINTENA =1;//enable RXBKINTENA isr       ScicRegs.SCIHBAUD = 0x0000;    ScicRegs.SCILBAUD = 0x001a;       //25MHZ  115200bps       ScicRegs.SCIFFTX.all=0xE000;    ScicRegs.SCIFFRX.all=0x2028;//收取8个字符后进中断    ScicRegs.SCIFFCT.all=0x00;      ScicRegs.SCICTL1.all =0x0023;     // Relinquish SCI from Reset } //---------------------------------------------------- {// GPIO28-29设置成SCIA    GpioCtrlRegs.GPAPUD.bit.GPIO28=0;         //使能GPIO28内部上拉电阻    GpioCtrlRegs.GPAPUD.bit.GPIO29=0;         //使能GPIO29内部上拉电阻      GpioCtrlRegs.GPAQSEL2.bit.GPIO28=3;       //异步输入      GpioCtrlRegs.GPAMUX2.bit.GPIO28=1;       //GPIO28=SCIRXDA    GpioCtrlRegs.GPAMUX2.bit.GPIO29=1;       //GPIO29=SCITXDA      //GPIO62设置成SCICRX    GpioCtrlRegs.GPBPUD.bit.GPIO62=0;         //使能GPIO62内部上拉电阻      GpioCtrlRegs.GPBQSEL2.bit.GPIO62=3;       //异步输入      GpioCtrlRegs.GPBMUX2.bit.GPIO62=1;       //GPIO62=SCIRXDC } //---------------------------------------------------------------------- { EALLOW; PieVectTable.SCIRXINTC = &scicRxFifoIsr;          EDIS;   // This is needed to disable write to EALLOW protected registers IER |=M_INT8; PieCtrlRegs.PIEIER8.bit.INTx5=1;     //PIE Group 8, INT5   } //-----------------------------------------------------   中断函数接收数据 interrupt void scicRxFifoIsr(void) {    Uint16 j; DINT; for(j = 0; j < 8; j++) {   scicTempBuf[j] = ScicRegs.SCIRXBUF.all; // Read data  一帧数据包包含16个字节 } scicRecIntFlag = 1; //接收中断标志   ScicRegs.SCIFFRX.bit.RXFFOVRCLR = 1;   // Clear Overflow flag ScicRegs.SCIFFRX.bit.RXFFINTCLR = 1;   // Clear Interrupt flag   PieCtrlRegs.PIEACK.all |= 0x080;       // Issue PIE ack EINT; }   //---------------------------------------------- 主循环中处理数据