niosii的UART串口通信

//

串口程序

已经试过

//

实现发

A

收到

E

发数字收到

ERROR

#ifndef UART_H_

#define UART_H_

#define

UART ((UART_STR *) UART_BASE)

#include

#include

#include

#include

#include

#include

#include

unsigned char receive_temp;//

接收到的临时数据

unsigned char buffer[6]=

#define

BUFFER_SIZE

200

/ *------------------------------------------------- ---------------

*

*--------- -------------------------------------------------- ----*/

typedef struct{

unsigned char mode_flag; //xmodem 1;uart 0;

unsigned int receive_flag;

unsigned int receive_count;

unsigned char receive_buffer[BUFFER_SIZE];

int (* send_byte)(unsigned char data);

void (* send_string)(unsigned int len, unsigned char *str);

int (* init)(void);

unsigned int (* baudrate)(unsigned int baudrate);

}UART_T;

extern UART_T uart;

/* * ========== ========================================== * Filename: uart.c

* Description: RS232 device driver

* Version: * Created: * Revision: none

* Compiler: Nios II IDE

* Author: AVIC

* Company:

* ========================= ==========================

*/

/*----------- -------------------------------------------------- -

* Include

*----------------------------------------- --------------------*/

/*-- -------------------------------------------------- ----------

Define

* Function Prototype

*-------------------------- ------------------------------------*/

static int uart_send_byte(unsigned char data);

static void uart_send_string(unsigned int len, unsigned char *str);

static int uart_init(void); static void uart_ISR(void);

static int set_baudrate(unsigned int baudrate);

//

初始

uart

结构体，注意结构体初始 化方式

UART_T uart={

.mode_flag=0,

.receive_flag=0,

.receive_count=0,

.send_byte=uart_send_byte,

.send_string=uart_send_string,

.init=uart_init,

.baudrate=set_baudrate };

/*

* === FUNCTION ========================================

* Name: uart_send_byte

* Description:

収送一个字节数据

* Description:

収送一个字节数据

*/

static int uart_send_byte(unsigned char data)

{

//

将収送癿数据放刡収送数据缓冲 区内，等徃状忞寄存器

TRDY

置

1< /p>

，当

TRDY

置

1

，说明

//

接收完毕

UART->IT_DATA = data;

while(!UART->);

return 0;

}

/*

* === FUNCTION ========================================

* Name: uart_send_string

* Description:

収送字符串数据

* ===================================== ================ */

static void uart_send_string(unsigned int len, unsigned char *str)

{

while(len--)

{

uart_send_byte(*str++);

}

}

/* * === FUNCTION ========================================

* Name: uart_init

* Description:

初始化程序