一个DSP TMS320 F28035的串口驱动程序
一个DSP TMS320 F28035的串口驱动程序[*]/************************************
[*] 标题：MySci.h
[*] 软件平台：DSP.com/forum.php?mod=forumdisplay&fid=58" target="_blank" class="relatedlink">CCS v5.2
[*] 硬件平台：TMS320F28035coreboard
[*] 主频：60M
[*]
[*] author：小船
[*] data：2013-01-22
[*]*************************************/
[*]#ifndef MySci_H_
[*]#define MySci_H_
[*]
[*]#include "PeripheralHeaderIncludes.h"
[*]#include <stdbool.h>
[*]
[*]#define RECEIVER_BUFF_SIZE 50
[*]
[*]struct Sci_send_data{
[*]char *AddPtr;
[*]char length;
[*]};
[*]
[*]extern char receiver_counter;
[*]extern struct Sci_send_data data;
[*]extern char receiver_data_buff;
[*]
[*]void MySci_init();
[*]bool MySci_send(char *Ptr,char length);
[*]
[*]#endif /* MySci_H_ */
[*]
[*]/************************************
[*] 标题：MySci.c
[*] 软件平台：CCS v5.2
[*] 硬件平台：TMS320F28035coreboard
[*] 主频：60M
[*]
[*] 描述：串口通信，波特率38400，自动中断发送，不必多余的等待
[*]注意：如果用fifo，就不用判断SciaRegs.SCIRXST.bit.RXRDY，此位不会生效
[*] 基于2803x C/C++ Header Files V1.21
[*]
[*] author：小船
[*] data：2013-01-22
[*]*************************************/
[*]#include"MySci.h"
[*]
[*]struct Sci_send_data data;
[*]char receiver_data_buff;
[*]char receiver_counter = 0;
[*]
[*]interrupt void rece_isr();
[*]interrupt void tx_isr();
[*]
[*]void MySci_init()
[*]{
[*]/*配置GPIO*/
[*] EALLOW;
[*] GpioCtrlRegs.GPAPUD.bit.GPIO28 = 0;
[*] GpioCtrlRegs.GPAPUD.bit.GPIO29 = 0;
[*] GpioCtrlRegs.GPAQSEL2.bit.GPIO28 = 3;
[*] GpioCtrlRegs.GPAMUX2.bit.GPIO28 = 1;
[*] GpioCtrlRegs.GPAMUX2.bit.GPIO29 = 1;
[*] EDIS;
[*]
[*]/*配置fifo*/
[*] SciaRegs.SCIFFTX.all=0xC060;
[*] SciaRegs.SCIFFRX.all=0x0021;//fifo接收到一个字节就中断
[*] SciaRegs.SCIFFCT.all=0x0;
[*]
[*]/*配置sci*/
[*] SciaRegs.SCICCR.all = 0x0007;
[*]
[*]
[*] SciaRegs.SCICTL1.all = 0x0063;
[*]
[*] //SciaRegs.SCICTL2.bit.TXINTENA = 1;
[*] SciaRegs.SCICTL2.bit.RXBKINTENA = 1;
[*] SciaRegs.SCIHBAUD = 0x0000;// 38400 baud @LSPCLK = 15MHz (60 MHz SYSCLK).
[*] SciaRegs.SCILBAUD = 0x0030;
[*]
[*] SciaRegs.SCICTL1.all = 0x0063;
[*] SciaRegs.SCIFFTX.bit.TXFIFOXRESET=1;
[*] SciaRegs.SCIFFRX.bit.RXFIFORESET=1;
[*]
[*] /*配置中断*/
[*] EALLOW;
[*] PieVectTable.SCITXINTA = &tx_isr; //注册中断向量表
[*] PieVectTable.SCIRXINTA = &rece_isr;
[*] PieCtrlRegs.PIECTRL.bit.ENPIE = 1; //使能PIE
[*] PieCtrlRegs.PIEIER9.bit.INTx1=1; //使能int9.1
[*] PieCtrlRegs.PIEIER9.bit.INTx2=1; //使能int9.2
[*] IER |= (1<<8);//使能int9
[*] EINT;
[*] EDIS;
[*]
[*] data.length=0;
[*] data.AddPtr=0;
[*]}
[*]
[*]bool MySci_send(char *Ptr,char length)
[*]{
[*]if(SciaRegs.SCIFFTX.bit.TXFFIENA==1)
[*]return false;
[*]else
[*]{
[*]data.AddPtr = Ptr;
[*]data.length = length;
[*]SciaRegs.SCIFFTX.bit.TXFFIENA=1;
[*]}
[*]return true;
[*]}
[*]
[*]interrupt void tx_isr()
[*]{
[*]if( data.length)
[*]{
[*]SciaRegs.SCITXBUF = *data.AddPtr++;
[*]data.length--;
[*]}
[*]else
[*]SciaRegs.SCIFFTX.bit.TXFFIENA=0;
[*]SciaRegs.SCIFFTX.bit.TXFFINTCLR=1;
[*]PieCtrlRegs.PIEACK.all |= PIEACK_GROUP9;
[*]}
[*]
[*]interrupt void rece_isr()
[*]{
[*]if(SciaRegs.SCIRXST.bit.RXERROR)
[*]{
[*]while(1);
[*]}
[*]if( receiver_counter != RECEIVER_BUFF_SIZE)
[*]receiver_data_buff = SciaRegs.SCIRXBUF.bit.RXDT;
[*]
[*]SciaRegs.SCIFFRX.bit.RXFFOVRCLR=1; // Clear Overflow flag
[*]SciaRegs.SCIFFRX.bit.RXFFINTCLR=1; // Clear Interrupt flag
[*]PieCtrlRegs.PIEACK.all |= PIEACK_GROUP9;
[*]}
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