ADC — 双 ADC 联合规则同步模式

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#include "at32f403a_407_board.h"
#include "at32f403a_407_clock.h"
__IO uint32_t adc1_ordinary_valuetab[3];
__IO uint32_t dma1_trans_complete_flag = 0;
__IO uint32_t conversion_times_index = 0;

static void gpio_config(void)
{
  gpio_init_type gpio_initstructure;
  crm_periph_clock_enable(CRM_GPIOA_PERIPH_CLOCK, TRUE);
  crm_periph_clock_enable(CRM_GPIOB_PERIPH_CLOCK, TRUE);

  gpio_default_para_init(&gpio_initstructure);
  gpio_initstructure.gpio_mode = GPIO_MODE_ANALOG;
  gpio_initstructure.gpio_pins = GPIO_PINS_4 | GPIO_PINS_5 | GPIO_PINS_6 | GPIO_PINS_7;
  gpio_init(GPIOA, &gpio_initstructure);

  gpio_initstructure.gpio_mode = GPIO_MODE_ANALOG;
  gpio_initstructure.gpio_pins = GPIO_PINS_0 | GPIO_PINS_1;
  gpio_init(GPIOB, &gpio_initstructure);
}

static void dma_config(void)
{
  dma_init_type dma_init_struct;
  crm_periph_clock_enable(CRM_DMA1_PERIPH_CLOCK, TRUE);
  nvic_irq_enable(DMA1_Channel1_IRQn, 0, 0);
  dma_reset(DMA1_CHANNEL1);
  dma_default_para_init(&dma_init_struct);
  dma_init_struct.buffer_size = 3;
  dma_init_struct.direction = DMA_DIR_PERIPHERAL_TO_MEMORY;
  dma_init_struct.memory_base_addr = (uint32_t)adc1_ordinary_valuetab;
  dma_init_struct.memory_data_width = DMA_MEMORY_DATA_WIDTH_WORD;
  dma_init_struct.memory_inc_enable = TRUE;
  dma_init_struct.peripheral_base_addr = (uint32_t)&(ADC1->odt);
  dma_init_struct.peripheral_data_width = DMA_PERIPHERAL_DATA_WIDTH_WORD;
  dma_init_struct.peripheral_inc_enable = FALSE;
  dma_init_struct.priority = DMA_PRIORITY_HIGH;
  dma_init_struct.loop_mode_enable = TRUE;
  dma_init(DMA1_CHANNEL1, &dma_init_struct);

  dma_interrupt_enable(DMA1_CHANNEL1, DMA_FDT_INT, TRUE);
}

static void adc_config(void)
{
  adc_base_config_type adc_base_struct;
  crm_periph_clock_enable(CRM_ADC1_PERIPH_CLOCK, TRUE);
  crm_periph_clock_enable(CRM_ADC2_PERIPH_CLOCK, TRUE);
  adc_reset(ADC1);
  adc_reset(ADC2);
  crm_adc_clock_div_set(CRM_ADC_DIV_4);
  adc_base_default_para_init(&adc_base_struct);

  /* select combine mode */
  adc_combine_mode_select(ADC_ORDINARY_SMLT_ONLY_MODE);

  /* ADC1 config */
  adc_base_struct.sequence_mode = TRUE;
  adc_base_struct.repeat_mode = FALSE;
  adc_base_struct.data_align = ADC_RIGHT_ALIGNMENT;
  adc_base_struct.ordinary_channel_length = 3;
  adc_base_config(ADC1, &adc_base_struct);
  adc_ordinary_channel_set(ADC1, ADC_CHANNEL_4, 1, ADC_SAMPLETIME_239_5);
  adc_ordinary_channel_set(ADC1, ADC_CHANNEL_5, 2, ADC_SAMPLETIME_239_5);
  adc_ordinary_channel_set(ADC1, ADC_CHANNEL_6, 3, ADC_SAMPLETIME_239_5);
  adc_ordinary_conversion_trigger_set(ADC1, ADC12_ORDINARY_TRIG_SOFTWARE, TRUE);
  adc_dma_mode_enable(ADC1, TRUE);

  /* ADC2 config */
  adc_base_config(ADC2, &adc_base_struct);
  adc_ordinary_channel_set(ADC2, ADC_CHANNEL_7, 1, ADC_SAMPLETIME_239_5);
  adc_ordinary_channel_set(ADC2, ADC_CHANNEL_8, 2, ADC_SAMPLETIME_239_5);
  adc_ordinary_channel_set(ADC2, ADC_CHANNEL_9, 3, ADC_SAMPLETIME_239_5);
  adc_ordinary_conversion_trigger_set(ADC2, ADC12_ORDINARY_TRIG_SOFTWARE, TRUE);

  adc_enable(ADC1, TRUE);
  adc_enable(ADC2, TRUE);

  /* ADC calibration */
  adc_calibration_init(ADC1);
  while(adc_calibration_init_status_get(ADC1));
  adc_calibration_start(ADC1);
  while(adc_calibration_status_get(ADC1));
  adc_calibration_init(ADC2);
  while(adc_calibration_init_status_get(ADC2));
  adc_calibration_start(ADC2);
  while(adc_calibration_status_get(ADC2));
}

int main(void)
{
  nvic_priority_group_config(NVIC_PRIORITY_GROUP_4);
  system_clock_config();
  at32_board_init();
  at32_led_off(LED2);
  at32_led_off(LED3);
  at32_led_off(LED4);
  uart_print_init(115200);
  gpio_config();
  dma_config();
  adc_config();

  /* enable DMA after ADC activation */
  dma_channel_enable(DMA1_CHANNEL1, TRUE);

  printf("combine_mode_ordinary_simult \r\n");
  while(1)
  {
    /* ordinary software start conversion */
    adc_ordinary_software_trigger_enable(ADC1, TRUE);

    /* wait conversion end */
    while(conversion_times_index == dma1_trans_complete_flag)
    {
    }
    conversion_times_index = dma1_trans_complete_flag;
    printf("conversion_times_index = %d\r\n",conversion_times_index);
    printf("adc1_ordinary_channel4 = 0x%x\r\n", adc1_ordinary_valuetab[0] & 0xFFFF);
    printf("adc1_ordinary_channel5 = 0x%x\r\n", adc1_ordinary_valuetab[1] & 0xFFFF);
    printf("adc1_ordinary_channel6 = 0x%x\r\n", adc1_ordinary_valuetab[2] & 0xFFFF);
    printf("adc2_ordinary_channel7 = 0x%x\r\n", (adc1_ordinary_valuetab[0] >> 16) & 0xFFFF);
    printf("adc2_ordinary_channel8 = 0x%x\r\n", (adc1_ordinary_valuetab[1] >> 16) & 0xFFFF);
    printf("adc2_ordinary_channel9 = 0x%x\r\n", (adc1_ordinary_valuetab[2] >> 16) & 0xFFFF);
    printf("\r\n");
    at32_led_toggle(LED2);
    delay_sec(1);
  }
}