使用SPI3 W25Q出错

发布于 2018-08-15 14:43:48 浏览：4109 订阅该版

stm32f1_hal bsp env里面没有spi3，我自己在drv_spi.c里面依葫芦画瓢添加了spi3，云行shell报下面错误：
```
(rt_object_get_type(&mutex->parent.parent) == RT_Object_Class_Mutex) assertion failed at function:rt_mutex_take, line number:674
```
是在
```c
/* config spi */
    {
        struct rt_spi_configuration cfg;
        cfg.data_width = 8;
        cfg.mode = RT_SPI_MODE_0 | RT_SPI_MSB; /* SPI Compatible: Mode 0 and Mode 3 */
        cfg.max_hz = 50 * 1000 * 1000; /* 50M */
        rt_spi_configure(spi_flash_device.rt_spi_device, &cfg);
    }
```

rt_spi_configure函数里面的
```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)
        {
            if (device->bus->owner == device)
            {
                device->bus->ops->configure(device, &device->config);
            }

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

return RT_EOK;
}
```

`result = rt_mutex_take(&(device->bus->lock), RT_WAITING_FOREVER);`
这句话出错，
![TIM截图20180815144127.png](/uploads/201808/15/144141m1l59s6dsv45555x.png)

这是调试变量，感觉`device->bus->lock`值好像不对，应该是ram值吧？这是rom地址了。
还有就是问一下，这个device的地址就是`_spi_bus3`地址 怎么感觉不对劲啊？这两个不是同一个结构体啊，更不是union啊？