c文件定义了‘类’的行为：
/******************************************************************************
File Name: uart.c --> serial.c
Copyright:
Version:
Description:
Uart Operation module
Author: EMAIL:
Kevin.Zu zukeqiang@gmail.com
*******************************************************************************
Revision History
-------------------------------------------------------------------------
DATE NAME DESCRIPTION
20121214 Kevin.Zu Create
20131205 Kevin.Zu Add to ESL Controller project
*******************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <termios.h>
#include <pthread.h>
#include <string.h>
#include <termios.h>
#include <assert.h>
#include <signal.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include "sys.h"
#include "serial.h"
#ifdef __cplusplus
extern "C"
{
#endif
static int uart_set_attribution(DpUart_t *p_uart);
static int SpeedArr[15] = {B115200, B38400, B19200, B9600, B4800, B2400, B1200, B300,
B38400, B19200, B9600, B4800, B2400, B1200, B300};
static int NameArr[15] = {115200, 38400, 19200, 9600, 4800, 2400, 1200, 300,
38400, 19200, 9600, 4800, 2400, 1200, 300};
int uart_open(DpUart_t *p_uart)
{
p_uart->fd_p = open(p_uart->uart_dev_path,p_uart->uart_flags);
if (p_uart->fd_p == -1) {
perror("uart_open");
return PL_OPEN_ERR;
}
return uart_set_attribution(p_uart);
}
int uart_close(DpUart_t *p_uart)
{
int ret;
if(p_uart->fd_p == -1){
printf("err fd!\n");
return PL_BADPARAMETER;
}
ret = close(p_uart->fd_p);
if(ret != 0)
return PL_CLOSE_ERR;
p_uart->fd_p = -1;
return PL_SUCCESS;
}
static int uart_set_attribution(DpUart_t *p_uart)
{
int i;
int num;
int status;
struct termios Opt;
tcgetattr(p_uart->fd_p, &Opt);
/* set speed */
num = sizeof(SpeedArr) / sizeof(int);
for (i=0; i<num; i++){
if (p_uart->speed == NameArr){
tcflush(p_uart->fd_p, TCIOFLUSH);
cfsetispeed(&Opt, SpeedArr);
cfsetospeed(&Opt, SpeedArr);
break;
}
}
if (i > num){
return PL_BADPARAMETER;
}
Opt.c_iflag &=~(IGNBRK|IGNCR|INLCR|ICRNL|IUCLC|IXANY|IXON|IXOFF|INPCK|ISTRIP);
Opt.c_iflag |= (BRKINT|IGNPAR);
Opt.c_oflag &=~OPOST;
Opt.c_lflag &=~(XCASE|ECHONL|NOFLSH);
Opt.c_lflag &=~(ICANON|ISIG|ECHO);
Opt.c_cflag |= (CLOCAL|CREAD);
/* set data bits */
switch (p_uart->nDatabits){
case 7:
Opt.c_cflag |= CS7;
break;
case 8:
Opt.c_cflag |= CS8;
break;
default:
perror("Unsupported data bits");
return PL_BADPARAMETER;
}
/* set parity */
switch (p_uart->nParity){
case 'n':
case 'N':
Opt.c_cflag &= ~PARENB;
Opt.c_iflag &= ~INPCK;
break;
case 'o':
case 'O':
Opt.c_cflag |= (PARODD | PARENB);
Opt.c_iflag |= INPCK;
break;
case 'e':
case 'E':
Opt.c_cflag |= PARENB;
Opt.c_cflag &= ~PARODD;
Opt.c_iflag |= INPCK;
break;
case 's':
case 'S':
Opt.c_cflag &= ~PARENB;
Opt.c_cflag &= ~CSTOPB;
Opt.c_iflag |= INPCK;
break;
default:
perror("Unsupported parity");
return PL_BADPARAMETER;
}
/* set stop bits */
switch (p_uart->nStopbits){
case 1:
Opt.c_cflag &= ~CSTOPB;
break;
case 2:
Opt.c_cflag |= CSTOPB;
break;
default:
perror("Unsupported stop bits");
return PL_BADPARAMETER;
}
tcflush(p_uart->fd_p, TCIFLUSH);
//tcflush(fd, TCIOFLUSH);
Opt.c_cc[VTIME] = p_uart->c_cc_vtime;
Opt.c_cc[VMIN] = p_uart->c_cc_vmin;
if (tcsetattr(p_uart->fd_p, TCSANOW, &Opt) != 0){
perror("tcsetattr err");
return PL_BADPARAMETER;
}
ioctl(p_uart->fd_p, TIOCMGET, &status);
status |= TIOCM_RTS;
ioctl(p_uart->fd_p, TIOCMSET, &status);
//fcntl(fd, F_SETFL, FNDELAY);
return PL_SUCCESS;
}
int uart_recv(int fd, char *buf, int len)
{
return read(fd, buf, len);
}
int uart_send(int fd, char *buf, int len)
{
return write(fd, buf, len);
}
#ifdef __cplusplus
}
#endif |
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