GD32E230+ADC+DMA 多通道采集

ADC DMA 在这里收集单通道

ADC.h

 #ifndef __ADC_H #define __ADC_H  #include "gd32e23x.h"  void       UserADC_init(void) ; uint16_t   GetADCVal(uint8_t adcindex);   #endif //__ADC_H 

ADC.c

#include "adc.h"  __IO  uint16_t ADCConvertedValue[5];   void ADC_IO_Init(void)   { 
           rcu_periph_clock_enable(RCU_GPIOA);     /* ADCCLK = PCLK2/6 */     rcu_adc_clock_config(RCU_ADCCK_APB2_DIV6);// ADC时钟为 72/6 = 12MHz        gpio_mode_set(GPIOA, GPIO_MODE_ANALOG, GPIO_PUPD_NONE, GPIO_PIN_0);      gpio_mode_set(GPIOA, GPIO_MODE_ANALOG, GPIO_PUPD_NONE, GPIO_PIN_1);      gpio_mode_set(GPIOA, GPIO_MODE_ANALOG, GPIO_PUPD_NONE, GPIO_PIN_4);      gpio_mode_set(GPIOA, GPIO_MODE_ANALOG, GPIO_PUPD_NONE, GPIO_PIN_5);      gpio_mode_set(GPIOA, GPIO_MODE_ANALOG, GPIO_PUPD_NONE, GPIO_PIN_6); }    void   ADC_DMAConfig(void)   { 
          /* ADC_DMA_channel configuration */
    dma_parameter_struct dma_data_parameter;

	  rcu_periph_clock_enable(RCU_DMA);
	    /* enable ADC clock */
    rcu_periph_clock_enable(RCU_ADC);
	
    /* ADC DMA_channel configuration */
    dma_deinit(DMA_CH0);
    
    /* initialize DMA single data mode */
    dma_data_parameter.periph_addr  = (uint32_t)(&ADC_RDATA);
    dma_data_parameter.periph_inc   = DMA_PERIPH_INCREASE_DISABLE;
    dma_data_parameter.memory_addr  = (uint32_t)(&ADCConvertedValue);
    dma_data_parameter.memory_inc   = DMA_MEMORY_INCREASE_ENABLE;
    dma_data_parameter.periph_width = DMA_PERIPHERAL_WIDTH_16BIT;
    dma_data_parameter.memory_width = DMA_MEMORY_WIDTH_16BIT;  
    dma_data_parameter.direction    = DMA_PERIPHERAL_TO_MEMORY;
    dma_data_parameter.number       = 5U;
    dma_data_parameter.priority     = DMA_PRIORITY_HIGH;
    dma_init(DMA_CH0, &dma_data_parameter);

    dma_circulation_enable(DMA_CH0);
    dma_memory_to_memory_disable(DMA_CH0);
    /* enable DMA channel */
    dma_channel_enable(DMA_CH0);
}


void   ADC_Config(void)
{ 
        
  /* ADC contineous function enable */
    adc_special_function_config(ADC_SCAN_MODE, ENABLE);
	  adc_special_function_config(ADC_CONTINUOUS_MODE, ENABLE);
    /* ADC trigger config */
    adc_external_trigger_source_config(ADC_REGULAR_CHANNEL, ADC_EXTTRIG_REGULAR_NONE); 
    /* ADC data alignment config */
    adc_data_alignment_config(ADC_DATAALIGN_RIGHT);
		/* ADC分辨率 12B */
	  adc_resolution_config(ADC_RESOLUTION_12B);
    /* ADC channel length config */
    adc_channel_length_config(ADC_REGULAR_CHANNEL, 5U);
 
    /* ADC regular channel config */

     adc_regular_channel_config(0U, ADC_CHANNEL_0, ADC_SAMPLETIME_55POINT5);
		 adc_regular_channel_config(1U, ADC_CHANNEL_1, ADC_SAMPLETIME_55POINT5);
		 adc_regular_channel_config(2U, ADC_CHANNEL_4, ADC_SAMPLETIME_55POINT5);
		 adc_regular_channel_config(3U, ADC_CHANNEL_5, ADC_SAMPLETIME_55POINT5);
		 adc_regular_channel_config(4U, ADC_CHANNEL_6, ADC_SAMPLETIME_55POINT5);
	
    adc_external_trigger_config(ADC_REGULAR_CHANNEL, DISABLE);
    /* enable ADC interface */
    adc_enable();
    delay_1ms(1U);
    /* ADC calibration and reset calibration */
    adc_calibration_enable();

    /* ADC DMA function enable */
    adc_dma_mode_enable();
    /* ADC software trigger enable */
	 adc_software_trigger_enable(ADC_REGULAR_CHANNEL);
}

void   UserADC_init(void)
{ 
       
	ADC_IO_Init();
	ADC_DMAConfig();
	ADC_Config();
}


uint16_t   GetADCVal(uint8_t adcindex) //任意地方调用 获取ADC值
{ 
       
	return  ADCConvertedValue[adcindex];
}

调用UserADC_init 进行初始化， 在定时器中断里面按需间隔一定时间使能采样，

			if(++trigger_adc_cnt>=50)//50ms
			{ 
       
			  trigger_adc_cnt = 0;
			  adc_software_trigger_enable(ADC_REGULAR_CHANNEL);
			}

然后在主循环任意地方调用GetADCVal(uint8_t adcindex)；获取ADC值就可以了。 ADC滤波算法另加。