发送完成回调问题

发布于 2018-03-09 09:54:33 浏览：1643 订阅该版

请教一下发送完成回调问题。
我SPI的433芯片，在发送完成后芯片会返回个信号，我在发送函数中等待接收这个信号，接收到后才完成，然后调dev->tx_complete(dev,(void*)buffer);，但是这个发送回调好像没起到作用。
```static rt_size_t si446x_spi_write(rt_device_t dev, rt_off_t pos, const void* buffer, rt_size_t size)
{
    RT_ASSERT(dev != RT_NULL);
    uint8_t *tx_buf;
    SI446X_SEND_PACKET((uint8_t*)buffer, size, 0, 0);         //此处有while等芯片的信号脚信号
    SI446X_START_RX( 0, 0, PACKET_LENGTH,0,0,3 );
	  rt_pin_irq_enable(SI446X_INT_PIN, 1);
    dev->tx_complete(dev,(void*)buffer);
    return 0;
}```
```rt_err_t HalWlSend(uint8_t *data,uint16_t len)  //发送函数
{
	 if(si_dev == RT_NULL)
	 {
		 rt_kprintf("si_dev is NULL <br>");
	    return RT_ERROR;
	 }
    rt_device_write(si_dev,0,data,len);
        /* 等待发送完成*/	
        rt_completion_init(&si_tx_completion);
        rt_completion_wait(&si_tx_completion,5);    // 此处发送完成回调没有起到作用，全靠超时
    return RT_EOK;
}

/* 发送完数据回调函数*/
rt_err_t si446x_tx_complete(rt_device_t dev, void *buff )
{
    rt_completion_done(&si_tx_completion);
    return RT_EOK;
}
```

1 个回答

belen 2018-03-09

这家伙很懒，什么也没写！

```
void SI446X_SEND_PACKET( uint8_t *txbuffer, uint8_t size, uint8_t channel, uint8_t condition)
{
    uint8_t cmd[5];
    uint8_t readbuf[9] = {5};
    uint8_t tx_len = size;
    uint8_t length, i;
    struct rt_spi_device *spi;//spi口
    rt_pin_irq_enable(SI446X_INT_PIN, 0);
    spi=(struct rt_spi_device *)rt_device_find("spi30");
    if(spi == RT_NULL)
    {
        rt_kprintf("\nspi_device  for spi30 not found!\n");
        return ;
    }
    SI446X_TX_FIFO_RESET( );		    //清发送FIFO
#if PACKET_LENGTH == 0						 //可变长度则将长度数据写入FIFO
    tx_len++;
    cmd[0]=WRITE_TX_FIFO;
    cmd[1] = size;
    rt_spi_send_then_send(spi,cmd,2,txbuffer,size);
#else
    cmd[0]=WRITE_TX_FIFO;
    rt_spi_send_then_send(spi,cmd,1,txbuffer,size);
#endif
    cmd[0] = START_TX;
    cmd[1] = channel;
    cmd[2] = condition;
    cmd[3] = 0;
    cmd[4] = tx_len;						    //发送多长的数据(包括长度数据)
    SI446X_CMD( cmd, 5 );					  //启动发送
//    rt_thread_delay(30);
    while(rt_pin_read(SI446X_INT_PIN)!=0)
        ;				   										//等待发送完毕
    cmd[0] = CHANGE_STATE;					//发送完毕后回到READY模式
    cmd[1] = 0x03;
    SI446X_CMD( cmd, 2 );
    do										//清发送中断标志
    {
        SI446X_INT_STATUS(readbuf);
    } while((readbuf[3] & ( 1<<5 )) || (rt_pin_read(SI446X_INT_PIN) == 0)); //等待中断标志为0和电平回到高状态同时成立
#ifdef SI446X_LOG
    rt_kprintf("si4463 send packet(len=%d)\r\n",tx_len);
    for(uint8_t len = 0; len < size; len++)
        rt_kprintf("%02X ",*txbuffer++);
    rt_kprintf("\r\n");
#endif
}
```