求助，新版STM32驱动框架中sdio修改时钟问题

发布于 2019-05-09 08:40:36 浏览：2825 订阅该版

6 个回答

xanadu 2019-05-09

这家伙很懒，什么也没写！

int rt_hw_sdio_init(void)
{
    struct stm32_sdio_des sdio_des;
    SD_HandleTypeDef hsd;
    hsd.Instance = SDCARD_INSTANCE;
    {
        rt_uint32_t tmpreg = 0x00U;
#if defined(SOC_SERIES_STM32F1)
        /* enable DMA clock && Delay after an RCC peripheral clock enabling*/
        SET_BIT(RCC->AHBENR, sdio_config.dma_rx.dma_rcc);
        tmpreg = READ_BIT(RCC->AHBENR, sdio_config.dma_rx.dma_rcc);
#elif defined(SOC_SERIES_STM32F4) || defined(SOC_SERIES_STM32F7) || defined(SOC_SERIES_STM32L4)
        SET_BIT(RCC->AHB1ENR, sdio_config.dma_rx.dma_rcc);
        /* Delay after an RCC peripheral clock enabling */
        tmpreg = READ_BIT(RCC->AHB1ENR, sdio_config.dma_rx.dma_rcc);
#endif
        UNUSED(tmpreg); /* To avoid compiler warnings */
    }
    HAL_NVIC_SetPriority(SDIO_IRQn, 2, 0);
    HAL_NVIC_EnableIRQ(SDIO_IRQn);
    HAL_SD_MspInit(&hsd);

sdio_des.clk_get = stm32_sdio_clock_get;
    sdio_des.hw_sdio = (struct stm32_sdio *)SDCARD_INSTANCE;
    sdio_des.rxconfig = DMA_RxConfig;
    sdio_des.txconfig = DMA_TxConfig;

host = sdio_host_create(&sdio_des);
    if (host == RT_NULL)
    {
        LOG_E("host create fail");
        return -1;
    }

return 0;
}
在新版bsp框架中，唯一调用的是这个函数，自动初始化。是否在这里设置分频系数，时钟呢？但是没看出来哪里设置啊，而且为什么找不到注册sd卡到驱动框架的语句呢？