[RK_2014_0911]串口代碼備份，SerialPortOpen()，SerialPortRead()，SerialPortWrite()，2014系統備份軟件
【代碼備份01】
uart.c
![]()
/*******************************************************************************
Copyright (C), *** Tech. Co., Ltd.
FileName: uart.c
Author:
Version :
Date: 2008-1-11
Description: 串口的通用操作文件
other:
Function List:
History: // 歷史修改記錄
1. Date:
Author:
Version:
Modification:
*******************************************************************************/
#include "uart.h"
#include "system.h"
int SpeedArr[6] = { B1200, B1800, B2400, B4800, B9600, B19200 };
/*******************************************************************************
Function: UartOpen
Description: 初始化串口
Calls:
Called By:
Global Accessed:
Global Updated:
Input: 1.UartInitParam:串口初始化參數
Output:
Return: -1為失敗, 成功返回串口的文件描述符
Others:
*******************************************************************************/
int
UartOpen (int UartIndex, UART485_INIT_CONFIG *pUartInitConfig,
int *pUartFd)
{
#ifndef MCU_I686
#else //上位機模擬
char dev[20];
struct termios opt;
sprintf (dev, "/dev/ttyS%d", UartIndex);
if (((*pUartFd) = open (dev, O_RDWR | O_NOCTTY)) < 0)
{
printf ("can not open ttyS%d device\n", UartIndex);
return -1;
}
tcgetattr ((*pUartFd), &opt);
//設置波特率
if ((pUartInitConfig->speed) > 5)
return -1;
cfsetispeed (&opt, SpeedArr[(int) pUartInitConfig->speed]);
cfsetospeed (&opt, SpeedArr[(int) pUartInitConfig->speed]);
//設置數據位
opt.c_cflag &= (~CSIZE);
switch (pUartInitConfig->databit)
{
case 7:
opt.c_cflag |= CS7;
break;
case 8:
opt.c_cflag |= CS8;
break;
default:
printf ("Unsupported data size\n");
return -1;
}
//設置停止位
switch (pUartInitConfig->stopbit)
{
case 1:
opt.c_cflag &= ~CSTOPB;
break;
case 2:
opt.c_cflag |= CSTOPB;
break;
default:
printf ("Unsupported stop bits\n");
return -1;
}
//設置校驗位
switch (pUartInitConfig->verify)
{
case 'n':
opt.c_cflag &= ~PARENB;
opt.c_iflag &= ~INPCK;
break;
case 'o':
opt.c_cflag |= (PARODD | PARENB);
opt.c_iflag |= INPCK;
break;
case 'e':
opt.c_cflag |= PARENB;
opt.c_cflag &= ~PARODD;
opt.c_iflag |= INPCK;
break;
default:
printf ("Unsupported parity\n");
return -1;
}
//設置超時時間
opt.c_cc[VTIME] = 10;
opt.c_cc[VMIN] = 0;
//設置為RAW模式
opt.c_lflag &= ~(ICANON | ECHO | ECHOE | ISIG);
opt.c_iflag &= ~(IXON | IXOFF | ICRNL);
opt.c_oflag &= ~OPOST;
tcflush ((*pUartFd), TCIOFLUSH);
return tcsetattr ((*pUartFd), TCSANOW, &opt);
#endif
}
/*******************************************************************************
Function: UartClose
Description: 關閉串口
Calls:
Called By:
Global Accessed:
Global Updated:
Input: 1.UartFd:串口的文件描述符
Output:
Return: -1為失敗
Others:
*******************************************************************************/
int
UartClose (int UartFd)
{
return close (UartFd);
}
/*******************************************************************************
Function: UartSend
Description: 串口的發送函數
Calls:
Called By:
Global Accessed:
Global Updated:
Input: 1.UartFd:串口的文件描述符
2.SendBuff:發送緩沖區
3.SendNum:發送字節數
Output:
Return: -1為失敗,
Others:
*******************************************************************************/
int
UartSend (int UartFd, unsigned char *pSendBuff, int SendNum)
{
int n_send, write_num;
for (n_send = 0; n_send < SendNum;)
{
write_num = write (UartFd, &pSendBuff[n_send], SendNum - n_send);
if (write_num <= 0) //發送失敗
return -1;
n_send = n_send + write_num;
}
return n_send;
}
/*******************************************************************************
Function: UartRcv
Description: 串口的接收函數
Calls:
Called By:
Global Accessed:
Global Updated:
Input: 1.UartFd:串口的文件描述符
2.RcvBuff:接收緩沖區
3.RcvNum:接收字節數
Output:
Return: -1為失敗,
Others:
*******************************************************************************/
int
UartRcv (int UartFd, unsigned char *pRcvBuff, int RcvNum, int OverTime)
{
#ifndef MCU_I686
#else
int n_rcv, read_num;
for (n_rcv = 0; n_rcv < RcvNum;)
{
read_num = read (UartFd, &pRcvBuff[n_rcv], RcvNum - n_rcv);
if (read_num <= 0) //接收超時或失敗
return -1;
n_rcv = n_rcv + read_num;
}
return n_rcv;
#endif
}
/*******************************************************************************
Function: UartClearRcvBuf
Description: 串口緩沖區的清空函數
Calls:
Called By:
Global Accessed:
Global Updated:
Input: 1.UartFd:串口的文件描述符
Output:
Return: -1為失敗,
Others:
*******************************************************************************/
int
UartClearRcvBuf (int UartFd)
{
#ifndef MCU_I686
#else
return tcflush (UartFd, TCIOFLUSH);
#endif
}
View Code
uart.h
![]()
/*******************************************************************************
Copyright (C), *** Tech. Co., Ltd.
File name: uart.h
Author:
Version:
Date: 2008-1-11
Description: 串口通用操作的頭文件
Others:
Function List:
1. int UartOpen( UART_INIT_PARAM UartInitParam );
2. int UartClose( int UartFd );
3. int UartSend( int UartFd, unsigned char *SendBuff, int SendNum );
4. int UartRcv( int UartFd, unsigned char *RcvBuff, int RcvNum );
5. int UartRcv( int UartFd );
History:
1. Date:
Author:
Modification:
*******************************************************************************/
#ifndef _UART_H_
#define _UART_H_
#include <stdio.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <time.h>
#include <pthread.h>
#include <string.h>
#include <stdlib.h>
#include <dirent.h>
#include <semaphore.h>
#include <mntent.h>
#include <sys/vfs.h>
#include <getopt.h>
#include <termios.h>
#include <errno.h>
#include <sys/ioctl.h>
#include <linux/ioctl.h>
extern int SpeedArr[6];
typedef struct _UART485_INIT_CONFIG
{
char speed; //串口速度, 0-5代表1200,1800,2400,4800,9600,19200
char databit; //串口數據位 5,6,7或8
char stopbit; //串口停止位 1或2
char verify; //串口校驗位 'n','o','e'分別代表無校驗,奇校驗,偶校驗
} UART485_INIT_CONFIG;
int UartOpen (int UartIndex, UART485_INIT_CONFIG *pUartInitConfig,
int *pUartFd);
int UartClose (int UartFd);
int UartSend (int UartFd, unsigned char *pSendBuff, int SendNum);
int UartRcv (int UartFd, unsigned char *pRcvBuff, int RcvNum,
int OverTime);
int UartClearRcvBuf (int UartFd);
#endif //end _UART_H_
View Code
【代碼備份02】
【完結】
