Linux串口测试程序

return g_PCUART_fd; }
uart_init int
( int COM, int BAUD, int databits, int stopbit, int paritybit )
{ int fd_uart;
struct termios options;
if( COM1 == COM ) {
/* ===============================================================================
********************
<lihf> linux串口测试代码
*******************
* Linux版本号2.6.23.17
printf("[ERROR]Uart databits is wrong! \n"); goto ↓uart_init_fail; }
switch( stopbit )
{
case 1 : options.c_cflag &= ~CSTOPB; break; //1位停止位 case 2 : options.c_cflag |= CSTOPB; break; //2位停止位
BAUD = B9600; }
if( cfsetospeed(&options, BAUD) < 0 )
{ printf("[fail] Set uart output baudrate fail!\n"); goto ↓uart_init_fail;
}
if( cfsetispeed(&options, BAUD) < 0 )
BAUD = B38400; } else if( 57600 == BAUD ) {
BAUD = B57600; } else if( 115200 == BAUD ) {
BAUD = B115200; } else if( 230400 == BAUD ) {
BAUD = B230400; } else {
char test_string2[50];
char recv[100]; char recv_len; int i;
timestamp = get_SencondofDay();
device_init();
while( 1 ) {
#if 0 if( get_SencondofDay() - timestamp > 2 ) {
}
options.c_iflag = 0; options.c_oflag = 0; options.c_lflag = 0;
//17个特殊字符
options.c_cc[VINTR] = 0; options.c_cc[VQUIT] = 0; options.c_cc[VERASE] = 0; options.c_cc[VKILL] = 0;
options.c_cflag |= CLOCAL | CREAD; //设置控制模式状态，本地连接，接收使能
options.c_cflag &= ~CSIZE;
//字符长度掩码，设置数据位之前一定要屏掉这个位
switch( databits ) {
case 7 : options.c_cflag |= CS7; break; case 8 : options.c_cflag |= CS8; break; default :
#if 0 test_string2[0] = 0xff; test_string2[1] = 0xaa; test_string2[2] = 0xbb; test_string2[3] = 0xff; UART_Sent( g_PCUART_fd, test_string2, 4 ); #else
}
} ? end while 1 ? return 0; } ? end main ?
int device_init( void )
{
uart_init g_PCUART_fd =
( COM1, 115200, 8, 1, 'N' );
if( FALSE == g_PCUART_fd ) {
printf(" UART COM1 initialize fail!\n"); }
( g_PCUART_fd, recv, 100, 1, 0 );
//<lihf> 等待1s
if( recv_len > 0 ) {
for( i=0; i<recv_len; i++ ) {
test_string2[i] = recv[i]; }
UART_Sent( g_PCUART_fd, test_string2, recv_len );
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/time.h> //gettimeofday() #include <sys/select.h> //fd_set,select()...
goto ↓uart_init_fail;
} ? end switch paritybit ?
if( BAUD <=0 || 9600 == BAUD ) {
BAUD = B9600; } else if( 19200 == BAUD ) {
BAUD = B19200; } else if( 38400 == BAUD ) {
//不使能输入输出奇偶检验 //不启用输入奇偶检测
break;
case 'o' :
case 'O' :
options.c_cflag |= PARENB | PARODD;
//奇校验
options.c_iflag |= INPCK;
//打开输入奇偶检测
break;
case 'e' :
case 'E' :
UART_Sent( g_PCUART_fd, test_string, strlen(test_string) ); #endif
timestamp = get_SencondofDay(); } #endif
/*<lihf> 串口发什么数据过来，就回什么数据 */
UART_Recv recv_len =
uart_init int
( int COM, int BAUD, int databits, int stopbit, int paritybit );
int UART_Sent( int fd, char *send_data, int len );
int UART_Recv( int fd, char *recv_data, int len, long wait_seconds, long
default :
printf("[ERROR]Uart stopbit is wrong! \n"); goto ↓uart_init_fail; }
switch( paritybit )
{
case 'n' :
case 'N' :
options.c_cflag &= ~PARENB; options.c_iflag &= ~INPCK;
FD_ZERO( &fs_read ); FD_SET(fd, &fs_read);
tv__sec = wait_seconds; tv__usec = wait_usecond;
wait_usecond );
long int get_SencondofDay( void );
long int get_msSecondofDay( void );
main int
( int argc, char *argv[] )
{
long int timestamp;
//char test_string[50] = "Hello world!!\n";
} }
UART_Recv int
( int fd, char *recv_data, int len, long wait_seconds,
long wait_usecond ) {
fd_set fs_read; struct timeval tv_timeout; int ret = 0; int recv_len = 0;
options.c_cflag |= PARENB; options.c_cflag &= ~PARODD;
//偶校验
options.c_iflag |= INPCK;
//打开输入奇偶检测
break;
default :
printf( "[ERROR]Uart paritybit is wrong! \n" );
* 程序功能: linux主机UART1接收PC COM口发送过来的数据，原封不动返回给PC的COM口
* 已经通过多次测试验证通过。
* ===============================================================================*/
#include <termios.h>
{ printf("[fail] Set uart input baudrate fail!\n"); goto ↓uart_init_fail;