Function efm32_adc_cfg_dma

bsp/efm32/drv_adc.c:213–260

/ * @brief * Configure DMA for ADC * * @details * * @note * * @param[in] adc_device * Pointer to ADC registers base address * * @param[in] mode * ADC mode * * @param[in] channel * DMA channel ******************************************************************************/

 *   DMA channel
 ******************************************************************************/
void efm32_adc_cfg_dma(
        ADC_TypeDef             *adc_device,
        rt_uint8_t              mode,
        rt_uint8_t              channel)
{
    DMA_CfgChannel_TypeDef  chnlCfg;
    DMA_CfgDescr_TypeDef    descrCfg;

    if (channel == (rt_uint8_t)EFM32_NO_DMA)
    {
        return;
    }

    /* Set up DMA channel */
    chnlCfg.highPri     = false;
    chnlCfg.enableInt   = false;
    if (adc_device == ADC0)
    {
        switch (mode & ADC_MASK_MODE)
        {
        case ADC_MODE_SINGLE:
            chnlCfg.select = DMAREQ_ADC0_SINGLE;
            break;

        case ADC_MODE_SCAN:
            chnlCfg.select = DMAREQ_ADC0_SCAN;
            break;

        default:
            return;
        }
    }
    else
    {
        // TODO: Any other channel?
        return;
    }
    chnlCfg.cb          = RT_NULL;
    DMA_CfgChannel((rt_uint32_t)channel, &chnlCfg);

    /* Setting up DMA channel descriptor */
    descrCfg.dstInc     = dmaDataInc4;
    descrCfg.srcInc     = dmaDataIncNone;
    descrCfg.size       = dmaDataSize4;
    descrCfg.arbRate    = dmaArbitrate1;
    descrCfg.hprot      = 0;
    DMA_CfgDescr((rt_uint32_t)channel, true, &descrCfg);
}

/***************************************************************************//**
 * @brief