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标题: 一个DSP TMS320 F28035的串口驱动程序 [打印本页]

作者: yuyang911220 时间: 2017-6-19 11:55 标题: 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[RECEIVER_BUFF_SIZE];
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[RECEIVER_BUFF_SIZE];
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[receiver_counter++] = 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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