SPI

rt_spi_configure 配置不上

发布于 2019-06-22 12:57:16 浏览：2332 订阅该版

7 个回答

aozima 2019-06-22

调网络不抓包，调I2C等时序不上逻辑分析仪，就像电工不用万用表！多用整理的好的文字，比截图更省流量，还能在整理过程中思考。

davi3119 2019-06-22

这家伙很懒，什么也没写！

zhangjun 2019-06-23

这家伙很懒，什么也没写！

aozima 2019-06-23

调网络不抓包，调I2C等时序不上逻辑分析仪，就像电工不用万用表！多用整理的好的文字，比截图更省流量，还能在整理过程中思考。

davi3119 2019-06-23

这家伙很懒，什么也没写！

[i=s] 本帖最后由 aozima 于 2019-7-4 15:27 编辑 [/i]

```
int rt_hw_max186_init(void)//
{
        int res=0;
        __HAL_RCC_GPIOB_CLK_ENABLE();
    rt_hw_spi_device_attach("spi2", "spi20", GPIOB, GPIO_PIN_12);
        //
        spi_dev_max186 = (struct rt_spi_device *)rt_device_find("spi20");
        if (spi_dev_max186==RT_NULL)
    {
                rt_kprintf("rt_spi_bus_attach_device failed !\r\n");
                return res;
    }
    /* config spi */
    {
        struct rt_spi_configuration test_cfg;
        test_cfg.data_width = 8;
        test_cfg.max_hz =50 * 1000; /* 45M*/
        test_cfg.mode = RT_SPI_MASTER | RT_SPI_MODE_0 | RT_SPI_MSB;/* CPOL = 0, CPHA = 0 */
        //
        rt_spi_configure(spi_dev_max186, &test_cfg);
    }
        rt_thread_delay(500);
        rt_kprintf(" \r\n max186 device init success! \r\n");
    return RT_EOK;
}
```

单步调试到spi_core.c

```
rt_err_t rt_spi_configure(struct rt_spi_device        *device,
                          struct rt_spi_configuration *cfg)
{
    rt_err_t result;

RT_ASSERT(device != RT_NULL);

/* set configuration */
    device->config.data_width = cfg->data_width;
    device->config.mode       = cfg->mode & RT_SPI_MODE_MASK ;
    device->config.max_hz     = cfg->max_hz ;

if (device->bus != RT_NULL)
    {
        result = rt_mutex_take(&(device->bus->lock), RT_WAITING_FOREVER);
        if (result == RT_EOK)
        {
         <font color="Red">  if (device->bus->owner == device)</font>
           {
                device->bus->ops->configure(device, &device->config);
            }

/* release lock */
            rt_mutex_release(&(device->bus->lock));
        }
    }

return RT_EOK;
}
```