大佬，为什么我在studio创建的gd32303项目，它rt_device_read读不了，而且uart_rx_ind这个也没进去，用的是官方代码

发布于 2024-10-08 16:52:34 浏览：198 订阅该版

```c
#include <rtthread.h>
#include <serial.h>
#define SAMPLE_UART_NAME                 "uart3"
#define DATA_CMD_END                     '!'       /* 结束位设置为 \r，即回车符 */
#define ONE_DATA_MAXLEN                  20         /* 不定长数据的最大长度 */

/* 用于接收消息的信号量 */
static struct rt_semaphore rx_sem;
static rt_device_t serial;

/* 接收数据回调函数 */
static rt_err_t uart_rx_ind(rt_device_t dev, rt_size_t size)
{
    //rt_kprintf("44444");
    /* 串口接收到数据后产生中断，调用此回调函数，然后发送接收信号量 */
    if (size > 0)
    {
        rt_kprintf("44444");
        rt_sem_release(&rx_sem);
    }
    return RT_EOK;
}

static char uart_sample_get_char(void)
{
    char ch;
    rt_kprintf("22222222");
    while (rt_device_read(serial, 0, &ch, 1) == 0)
    {
        rt_kprintf("333333");
        rt_sem_control(&rx_sem, RT_IPC_CMD_RESET, RT_NULL);
        rt_sem_take(&rx_sem, RT_WAITING_FOREVER);
    }
    return ch;
}

/* 数据解析线程 */
static void data_parsing(void)
{
    rt_kprintf("1111111");
    char ch;
    char data[ONE_DATA_MAXLEN];
    static char i = 0;

while (1)
    {
        ch = uart_sample_get_char();
        rt_device_write(serial, 0, &ch, 1);
        if(ch == DATA_CMD_END)
        {
            data[i++] = '\0';
            rt_kprintf("data=%s\n",data);
            i = 0;
            continue;
        }
        i = (i >= ONE_DATA_MAXLEN-1) ? ONE_DATA_MAXLEN-1 : i;
        data[i++] = ch;
    }
}
struct serial_configure config = RT_SERIAL_CONFIG_DEFAULT;
int main()
{
    char ch;
    rt_err_t ret = RT_EOK;

char str[] = "hello RT-Thread!\n";

/* 查找系统中的串口设备 */
    serial = rt_device_find(SAMPLE_UART_NAME);
    if (!serial)
    {
        rt_kprintf("find failed!");
        return RT_ERROR;
    }
    rt_device_control(serial, RT_DEVICE_CTRL_CONFIG, (void*)&config);
    /* 初始化信号量 */
    rt_sem_init(&rx_sem, "rx_sem", 0, RT_IPC_FLAG_FIFO);
    /* 以中断接收及轮询发送模式打开串口设备 */
    rt_device_open(serial, RT_DEVICE_FLAG_INT_RX|RT_DEVICE_OFLAG_RDWR);
    /* 设置接收回调函数 */
    rt_device_set_rx_indicate(serial, uart_rx_ind);
    /* 发送字符串 */
    rt_device_write(serial, 0, str, (sizeof(str) ));

/* 创建 serial 线程 */
    rt_thread_t thread = rt_thread_create("serial", (void (*)(void *parameter))data_parsing, RT_NULL, 1024, 25, 10);
    // 创建成功则启动线程
    if (thread != RT_NULL)
    {
        rt_thread_startup(thread);
    }
    else
    {
        ret = RT_ERROR;
    }

return ret;
}
```