USART3发送完成的回调函数无法得到运行？

发布于 2021-03-18 13:54:00 浏览：1052 订阅该版

ZBXY_7941 2021-03-19

这家伙很懒，什么也没写！

ZBXY_7941 2021-03-19

这家伙很懒，什么也没写！

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3 个回答

lucaja 2021-03-18

这家伙很懒，什么也没写！

flashman2002 2021-03-18

这家伙很懒，什么也没写！

lucaja 2021-03-19

这家伙很懒，什么也没写！

flashman2002 2021-03-19

这家伙很懒，什么也没写！

lucaja 2021-03-19

这家伙很懒，什么也没写！

`struct My_serial serial_t;

static rt_device_t serial_d;
struct serial_configure cfg = RT_SERIAL_CONFIG_DEFAULT;

static struct rt_semaphore tx_sem;
static struct rt_semaphore rx_sem;

rt_err_t serial_rx_done(rt_device_t dev, rt_size_t size);
rt_err_t serial_tx_done(rt_device_t dev,void *buffer);
/***********************************************************************************/
int init_serial(void){
    serial_d = rt_device_find("uart3");
    if(serial_d == RT_NULL){
        rt_kprintf("usart3 open failed\n");
        return 1;
    }
    rt_kprintf("serial:%d\n",serial_d);
    
    // init sem
    rt_sem_init(&tx_sem, "tx_sem", 1, RT_IPC_FLAG_FIFO);
    rt_sem_init(&rx_sem, "rx_sem", 0, RT_IPC_FLAG_FIFO);
    
    // config uart
    cfg.baud_rate = BAUD_RATE_115200;
    cfg.data_bits = DATA_BITS_8;
    cfg.stop_bits = STOP_BITS_1;
    cfg.bufsz = 1024;
    cfg.parity = PARITY_NONE;
    rt_device_control(serial_d, RT_DEVICE_CTRL_CONFIG, &cfg);
    
    // open serial and band callback function
    rt_device_open(serial_d, RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_INT_TX);
    
    rt_device_set_rx_indicate(serial_d, serial_rx_done);  
    rt_device_set_tx_complete(serial_d, serial_tx_done);
    
    // init serial state;
    serial_t.state = TEST_AT_NO;
    int count = 2;
    
    while(count){
        rt_sem_take(&tx_sem, RT_WAITING_FOREVER);
        serial_t.tx_len = 4;
        rt_device_write(serial_d, 0,  &(TEST_AT[0]), serial_t.tx_len);
        
        rt_sem_take(&rx_sem, RT_WAITING_FOREVER);
        serial_t.rx_len = 6;
        rt_device_read(serial_d, 0, &(serial_t.rx_buffer[0]), serial_t.rx_len);
        
        count--;
    }
    // check state code begin
    
    // check state code end
    return 0;
}

rt_err_t serial_rx_done(rt_device_t dev, rt_size_t size){
    if(size >= serial_t.rx_len){
        rt_sem_release(&tx_sem);
        rt_kprintf("rx_done\n");
    }  
    return RT_EOK;
}
rt_err_t serial_tx_done(rt_device_t dev,void *buffer){
    rt_sem_release(&rx_sem);
    rt_kprintf("tx done\n");
    return RT_EOK;
}`