void rcu_config(void)
{
    /* enable GPIO clock */
    rcu_periph_clock_enable(RCU_GPIOB);
    rcu_periph_clock_enable(RCU_GPIOE);
    /* enable ADC0 clock */
    rcu_periph_clock_enable(RCU_ADC0);
    /* enable DMA0 clock */
    rcu_periph_clock_enable(RCU_DMA0);
}

/*!
    \brief      configure the GPIO peripheral
    \param[in]  none
    \param[out] none
    \retval     none
*/
void gpio_config(void)
{
    /* config the GPIO as analog mode */
    gpio_mode_set(GPIOB, GPIO_MODE_ANALOG, GPIO_PUPD_NONE, GPIO_PIN_1);//GPIOB1,
                gpio_mode_set(GPIOE, GPIO_MODE_ANALOG, GPIO_PUPD_NONE, GPIO_PIN_13);
}

/*!
    \brief      configure the DMA peripheral
    \param[in]  none
    \param[out] none
    \retval     none
*/
void dma_config(void)
{
    /* ADC_DMA_channel configuration */
    dma_parameter_struct dma_data_parameter;
    /* ADC DMA_channel configuration */
    dma_deinit(DMA0, DMA_CH0);
    /* initialize DMA single data mode */
    dma_data_parameter.periph_addr  = (uint32_t)(&ADC_RDATA(ADC0));//外设基地址
    dma_data_parameter.periph_inc   = DMA_PERIPH_INCREASE_DISABLE;//内存地址增量模式
    dma_data_parameter.memory_addr  = (uint32_t)adc_value;//数据存放地址
    dma_data_parameter.memory_inc   = DMA_MEMORY_INCREASE_ENABLE;//内存地址增量模式
    dma_data_parameter.periph_width = DMA_PERIPHERAL_WIDTH_16BIT;//dma外设宽度16位，半字
    dma_data_parameter.memory_width = DMA_MEMORY_WIDTH_16BIT;
    dma_data_parameter.direction    = DMA_PERIPHERAL_TO_MEMORY;//传输模式，外设到存储（接收）
    dma_data_parameter.number       = 2;//长度
    dma_data_parameter.priority     = DMA_PRIORITY_HIGH;//优先级高
    dma_init(DMA0, DMA_CH0, &dma_data_parameter);
    dma_circulation_enable(DMA0, DMA_CH0);
    /* enable DMA channel */
    dma_channel_enable(DMA0, DMA_CH0);
}

/*!
    \brief      configure the ADC peripheral
    \param[in]  none
    \param[out] none
    \retval     none
*/
void adc_config(void)
{
           /* config ADC clock */
    rcu_adc_clock_config(RCU_CKADC_CKAHB_DIV10);
                adc_deinit(ADC0);
                adc_mode_config(ADC_MODE_FREE);//ADC工作在独立模式
    /* ADC continous function enable */
    adc_special_function_config(ADC0, ADC_SCAN_MODE, ENABLE);
    adc_special_function_config(ADC0, ADC_CONTINUOUS_MODE, ENABLE);
    /* ADC trigger config */
    adc_external_trigger_source_config(ADC0, ADC_REGULAR_CHANNEL, ADC0_1_EXTTRIG_REGULAR_NONE);//外部触发源设置
    /* ADC data alignment config */
    adc_data_alignment_config(ADC0, ADC_DATAALIGN_RIGHT);//数据对齐配置
    /* ADC channel length config */
    adc_channel_length_config(ADC0, ADC_REGULAR_CHANNEL, 2);//用到几个转换通道
    /* ADC regular channel config */
    adc_regular_channel_config(ADC0, 1, ADC_CHANNEL_7, ADC_SAMPLETIME_55POINT5);
                adc_regular_channel_config(ADC0, 2, ADC_CHANNEL_9, ADC_SAMPLETIME_55POINT5);
    adc_external_trigger_config(ADC0, ADC_REGULAR_CHANNEL, ENABLE);
    /* enable ADC interface */   
    adc_enable(ADC0);
                /* ADC DMA function enable */
    adc_dma_mode_enable(ADC0);
    /* ADC calibration and reset calibration */
    adc_calibration_enable(ADC0);
}


main.c
/* system clocks configuration */
    rcu_config();
/* GPIO configuration */
    gpio_config();
/* DMA configuration */
    dma_config();
/* ADC configuration */
    adc_config();
    adc_software_trigger_enable(ADC0, ADC_REGULAR_CHANNEL);