SPI驱动问题

发布于 2016-03-14 16:39:00 浏览：2209 订阅该版

spi_core.c文件中的函数如下 
```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;
}```

我的程序按照正常流程初始化spi 第一次执行上面这个函数的时候在 if (device->bus->owner == device)这里出现问题，device->bus->owner的值不为device 所以不能够初始化spi，网上查找发现有人贴的代码是 if (device->bus->owner == device)，网址是这个http://www.tuicool.com/articles/6bq6Bz   请问大神这里究竟是哪个，要是按照那个人写的不等于，我的程序可以正常执行，我的理解应该也是不等于