ch9329使用例程
时间: 2023-07-11 22:23:55 浏览: 152
ch9329是一款USB转串口芯片,它可以方便地将USB接口转换为串口接口,从而实现USB设备与串口设备之间的数据传输。以下是ch9329使用的一些例程:
1. 初始化ch9329
```c
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <termios.h>
#include <errno.h>
#define SERIAL_PORT "/dev/ttyUSB0"
int main(int argc, char *argv[])
{
int fd;
struct termios options;
fd = open(SERIAL_PORT, O_RDWR | O_NOCTTY | O_NDELAY);
if (fd == -1) {
printf("Error opening serial port %s: %s\n", SERIAL_PORT, strerror(errno));
return -1;
}
fcntl(fd, F_SETFL, 0);
tcgetattr(fd, &options);
cfsetispeed(&options, B115200);
cfsetospeed(&options, B115200);
options.c_cflag |= (CLOCAL | CREAD);
options.c_cflag &= ~PARENB;
options.c_cflag &= ~CSTOPB;
options.c_cflag &= ~CSIZE;
options.c_cflag |= CS8;
options.c_lflag &= ~(ICANON | ECHO | ECHOE | ISIG);
options.c_iflag &= ~(IXON | IXOFF | IXANY);
options.c_oflag &= ~OPOST;
tcsetattr(fd, TCSANOW, &options);
return 0;
}
```
2. 发送数据到ch9329
```c
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <termios.h>
#include <errno.h>
#define SERIAL_PORT "/dev/ttyUSB0"
int main(int argc, char *argv[])
{
int fd;
char *data = "Hello, ch9329!\r\n";
int len = strlen(data);
fd = open(SERIAL_PORT, O_RDWR | O_NOCTTY | O_NDELAY);
if (fd == -1) {
printf("Error opening serial port %s: %s\n", SERIAL_PORT, strerror(errno));
return -1;
}
write(fd, data, len);
return 0;
}
```
3. 接收ch9329发送的数据
```c
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <termios.h>
#include <errno.h>
#define SERIAL_PORT "/dev/ttyUSB0"
#define BUFFER_SIZE 256
int main(int argc, char *argv[])
{
int fd;
char buffer[BUFFER_SIZE];
int len;
fd = open(SERIAL_PORT, O_RDWR | O_NOCTTY | O_NDELAY);
if (fd == -1) {
printf("Error opening serial port %s: %s\n", SERIAL_PORT, strerror(errno));
return -1;
}
while (1) {
len = read(fd, buffer, BUFFER_SIZE);
if (len > 0) {
buffer[len] = '\0';
printf("Received data: %s\n", buffer);
}
}
return 0;
}
```
这些例程可以帮助你开始使用ch9329,但是具体的使用还需要根据自己的需求进行调整。