#include <stdio.h>/*标准输入输出定义*/
#include <stdlib.h>/*标准函数库定义*/
#include <unistd.h>/*Unix 标准函数定义*/
#include <sys/types.h>
#include <sys/stat.h>
#include "string.h"
#include <fcntl.h>/*文件控制定义*/
#include <termios.h>/*PPSIX 终端控制定义*/
#include <errno.h>/*错误号定义*/
#define FALSE -1
#define TRUE 0
/*********************************************************************/
int OpenDev(char *Dev)
{
int fd = open( Dev, O_RDWR | O_NOCTTY )//| O_NOCTTY | O_NDELAY
if (-1 == fd)
{
perror("Can't Open Serial Port")
return -1
}
else
return fd
}
/**
*@brief 设置串口通信速率
*@param fd 类型 int 打开串口的文件句柄
*@param speed 类型 int 串口速度
*@return void
*/
int speed_arr[] = { B38400, B19200, B9600, B4800, B2400, B1200, B300,
B38400, B19200, B9600, B4800, B2400, B1200, B300, }
int name_arr[] = {38400, 19200, 9600, 4800, 2400, 1200, 300, 38400,
19200, 9600, 4800, 2400, 1200, 300, }
void set_speed(int fd, int speed)
{
int i
int status
struct termios Opt
tcgetattr(fd, &Opt)
for ( i= 0i <sizeof(speed_arr) / sizeof(int)i++) {
if (speed == name_arr[i]) {
tcflush(fd, TCIOFLUSH)
cfsetispeed(&Opt, speed_arr[i])
cfsetospeed(&Opt, speed_arr[i])
status = tcsetattr(fd, TCSANOW, &Opt)
if (status != 0) {
perror("tcsetattr fd1")
return
}
tcflush(fd,TCIOFLUSH)
}
}
}
/**
*@param fd 类型 int 打开的串口文件句柄
*@param databits 类型 int 数据位 取值 为 7 或者8
*@param stopbits 类型 int 停止位 取值为 1 或者2
*@param parity 类型 int 效验类型 取值为N,E,O,,S
*/
int set_Parity(int fd,int databits,int stopbits,int parity)
{
struct termios options
options.c_lflag &= ~(ICANON | ECHO | ECHOE | ISIG)/*Input*/
options.c_oflag &= ~OPOST/*Output*/
if ( tcgetattr( fd,&options) != 0) {
perror("SetupSerial 1")
return(FALSE)
}
options.c_cflag &= ~CSIZE
switch (databits) /*设置数据位数*/
{
case 7:
options.c_cflag |= CS7
break
case 8:
options.c_cflag |= CS8
break
default:
fprintf(stderr,"Unsupported data size/n")return (FALSE)
}
switch (parity)
{
case 'n':
case 'N':
options.c_cflag &= ~PARENB/* Clear parity enable */
options.c_iflag &= ~INPCK/* Enable parity checking */
break
case 'o':
case 'O':
options.c_cflag |= (PARODD | PARENB)/* 设置为奇效验*/
options.c_iflag |= INPCK/* Disnable parity checking */
break
case 'e':
case 'E':
options.c_cflag |= PARENB/* Enable parity */
options.c_cflag &= ~PARODD/* 转换为偶效验*/
options.c_iflag |= INPCK/* Disnable parity checking */
break
case 'S':
case 's': /*as no parity*/
options.c_cflag &= ~PARENB
options.c_cflag &= ~CSTOPBbreak
default:
fprintf(stderr,"Unsupported parity/n")
return (FALSE)
}
/* 设置停止位*/
switch (stopbits)
{
case 1:
options.c_cflag &= ~CSTOPB
break
case 2:
options.c_cflag |= CSTOPB
break
default:
fprintf(stderr,"Unsupported stop bits/n")
return (FALSE)
}
/* Set input parity option */
if (parity != 'n')
options.c_iflag |= INPCK
tcflush(fd,TCIFLUSH)
options.c_cc[VTIME] = 150/* 设置超时15 seconds*/
options.c_cc[VMIN] = 0/* Update the options and do it NOW */
if (tcsetattr(fd,TCSANOW,&options) != 0)
{
perror("SetupSerial 3")
return (FALSE)
}
return (TRUE)
}
int main(int argc, char **argv)
{
int fd
int nread
char buff[512]
char *dev = "/dev/ttyS0"//串口二
fd = OpenDev(dev)
set_speed(fd,4800)
if (set_Parity(fd,8,1,'N') == FALSE)
{
printf("Set Parity Error/n")
exit (0)
}
int i
i = getchar()
if ( i == '1')
{
while (1) //循环读取数据
{
while((nread = read(fd, buff, 512))>0)
{
printf("/nLen %d/n",nread)
buff[nread+1] = '/0'
printf( "/n%s", buff)
}
}
}
if ( i == '2')
{
while (1) //循环写入数据
{
gets(buff)
printf("------buff--->%s<--------/n",buff)
int num = strlen(buff)
printf("--------num---->%d<--------------/n",num)
if ( num >0)
{
printf("Wirte num not NULL./r/n")
nread = write(fd, buff ,num)
if(nread == -1)
{
printf("Wirte sbuf error./n")
}
printf("--nread---->%d<-----------/n",nread)
}
}
}
close(fd)
//exit (0)
}
//创建一个串口通讯SerialPort CurrentPort = null
CurrentPort = new SerialPort()
CurrentPort.ReadBufferSize = 128
CurrentPort.PortName = comName //端口号
CurrentPort.BaudRate = bandRate//比特率
CurrentPort.Parity =parity//奇偶校验
CurrentPort.StopBits = stop//停止位
CurrentPort.DataBits = databit//数据位
CurrentPort.ReadTimeout = 1000//读超时，即在1000内未读到数据就引起超时异常
//绑定数据接收事件，因为发送是被动的，所以你无法主动去获取别人发送的代码，只能通过这个事件来处理
CurrentPort.DataReceived += Sp_DataReceived
CurrentPort.Open()
定义一个变量 byte[] receiveStr
//绑定的事件处理函数
private static void Sp_DataReceived(object sender, System.IO.Ports.SerialDataReceivedEventArgs e)
{
SerialPort sp = sender as SerialPort
if (sp == null)
return
byte[] readBuffer = new byte[sp.ReadBufferSize]
sp.Read(readBuffer, 0, readBuffer.Length)
//赋值
receiveStr=readBuffer//当然你可以通过转换将byte[]转换为字符串。
}
//你要求的按钮事件可以这么写
private void button1_Click(object sender, EventArgs e)
{
if(receiveStr!=null)
{
变量 xxx=receiveStr
}
}
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