【AT-START-F437测评】ADC

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meiyaolei| 初级工程师

楼主 | 2023-1-24 22:27 | 只看该作者 |只看大图回帖奖励

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start, 437, dc, ADC, AD

测评目地：利用上位机显示ADC采集，ADC是模数转换,获取通道1 18的电压值。配置流程：GPIO--通道传输--ADC设定--通道--获取VREF值，
1、资料
功能介绍：

框架：

寄存器：

2、代码

  adc_common_config_type adc_common_struct;
  adc_base_config_type adc_base_struct;
  crm_periph_clock_enable(CRM_ADC1_PERIPH_CLOCK, TRUE);
  nvic_irq_enable(ADC1_2_3_IRQn, 0, 0);

  adc_common_default_para_init(&adc_common_struct);
  adc_common_struct.combine_mode = ADC_INDEPENDENT_MODE;
  adc_common_struct.div = ADC_HCLK_DIV_4;
  adc_common_struct.common_dma_mode = ADC_COMMON_DMAMODE_DISABLE;
  adc_common_struct.common_dma_request_repeat_state = FALSE;
  adc_common_struct.sampling_interval = ADC_SAMPLING_INTERVAL_5CYCLES;
  adc_common_struct.tempervintrv_state = FALSE;
  adc_common_struct.vbat_state = TRUE;
  adc_common_config(&adc_common_struct);
  adc_base_default_para_init(&adc_base_struct);
  adc_base_struct.sequence_mode = FALSE;
  adc_base_struct.repeat_mode = FALSE;
  adc_base_struct.data_align = ADC_RIGHT_ALIGNMENT;
  adc_base_struct.ordinary_channel_length = 1;
  adc_base_config(ADC1, &adc_base_struct);
  adc_resolution_set(ADC1, ADC_RESOLUTION_12B);
  /* config ordinary channel */
  adc_ordinary_channel_set(ADC1, ADC_CHANNEL_18, 1, ADC_SAMPLETIME_47_5);
  adc_ordinary_conversion_trigger_set(ADC1, ADC_ORDINARY_TRIG_TMR1CH1, ADC_ORDINARY_TRIG_EDGE_NONE);
  adc_dma_mode_enable(ADC1, TRUE);
  adc_dma_request_repeat_enable(ADC1, TRUE);

  /* enable adc overflow interrupt */
  adc_interrupt_enable(ADC1, ADC_OCCO_INT, TRUE);

  /* adc enable */
  adc_enable(ADC1, TRUE);
  while(adc_flag_get(ADC1, ADC_RDY_FLAG) == RESET);

  /* adc calibration */
  adc_calibration_init(ADC1);
  while(adc_calibration_init_status_get(ADC1));
  adc_calibration_start(ADC1);
  while(adc_calibration_status_get(ADC1));

adc_ordinary_software_trigger_enable(ADC1, TRUE);
printf("vbat_value = %f V\r\n", ((double)3.3 * 4 * adc1_ordinary_value) / 4095);

3、打印的结果