求助：在AT组件中，又有新问题了

发布于 2018-10-28 23:33:33 浏览：2135 订阅该版

```c
int at_obj_exec_cmd(at_client_t client, at_response_t resp, const char *cmd_expr, ...)
{
    va_list args;
    rt_size_t cmd_size = 0;
    rt_err_t result = RT_EOK;
    const char *cmd = RT_NULL;
    RT_ASSERT(cmd_expr);
    if (client == RT_NULL)
    {
        rt_kprintf("input AT Client object is NULL, please create or get AT Client object!");
        return -RT_ERROR;
    }
    rt_mutex_take(client->lock, RT_WAITING_FOREVER);
    client->resp_status = AT_RESP_OK;
    client->resp = resp;
    va_start(args, cmd_expr);
    at_vprintfln(client->device, cmd_expr, args);
    va_end(args);
    if (resp != RT_NULL)
    {
        resp->line_counts = 0;
        if (rt_sem_take(client->resp_notice, resp->timeout) != RT_EOK)
        {
            cmd = at_get_last_cmd(&cmd_size);
            rt_kprintf("execute command %d (%s) timeout (%d ticks)! <br>", cmd_size, cmd, resp->timeout);
            client->resp_status = AT_RESP_TIMEOUT;
            result = -RT_ETIMEOUT;
            goto __exit;
        }
        if (client->resp_status != AT_RESP_OK)
        {
            cmd = at_get_last_cmd(&cmd_size);
            rt_kprintf("execute command (%.*s) failed! <br>", cmd_size, cmd);
            result = -RT_ERROR;
            goto __exit;
        }
    }
__exit:
    client->resp = RT_NULL;
    rt_mutex_release(client->lock);
    return result;
}
```
我发送指令，总是出现这两句话，大神有没有知道这个一般是那块出了问题，或者这个问题是什么？