c语言编写DALI收发代码

下面是一个简单的DALI收发代码示例，需要配合DALI总线转换器使用：

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <termios.h>

#define BAUDRATE B9600
#define DEVICE "/dev/ttyUSB0"

int main()
{
    int fd;
    struct termios options;

    fd = open(DEVICE, O_RDWR | O_NOCTTY | O_NDELAY);
    if (fd == -1) {
        perror("open");
        exit(EXIT_FAILURE);
    }

    fcntl(fd, F_SETFL, 0);
    tcgetattr(fd, &options);
    cfsetispeed(&options, BAUDRATE);
    cfsetospeed(&options, BAUDRATE);
    options.c_cflag |= (CLOCAL | CREAD);
    options.c_cflag &= ~PARENB;
    options.c_cflag &= ~CSTOPB;
    options.c_cflag &= ~CSIZE;
    options.c_cflag |= CS8;
    options.c_cflag &= ~CRTSCTS;
    options.c_lflag &= ~(ICANON | ECHO | ECHOE | ISIG);
    options.c_iflag &= ~(IXON | IXOFF | IXANY);
    options.c_oflag &= ~OPOST;
    options.c_cc[VMIN] = 1;
    options.c_cc[VTIME] = 0;
    tcsetattr(fd, TCSANOW, &options);

    unsigned char buffer[256];
    int nread, nwrite;

    // 发送DALI命令
    buffer[0] = 0xFE;  // DALI前导码
    buffer[1] = 0x05;  // DALI地址
    buffer[2] = 0x00;  // DALI命令
    nwrite = write(fd, buffer, 3);
    if (nwrite == -1) {
        perror("write");
        exit(EXIT_FAILURE);
    }

    // 接收DALI响应
    nread = read(fd, buffer, sizeof(buffer));
    if (nread == -1) {
        perror("read");
        exit(EXIT_FAILURE);
    }
    printf("%d bytes received: ", nread);
    for (int i = 0; i < nread; i++) {
        printf("%02X ", buffer[i]);
    }
    printf("\n");

    close(fd);

    return 0;
}

这段代码打开一个串口设备，发送一个DALI命令，然后等待接收DALI响应。其中，需要根据实际情况修改宏定义中的波特率和设备路径。同时，需要注意使用DALI总线转换器连接DALI总线和计算机。该示例代码仅供参考，具体实现还需要根据实际需求进行修改。