TMS320F28335程序设计之外设模块配置---SCI串行通信接口设计
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SCIBStep2: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SCISciSetup();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
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