Rath-HAL - ADC 读取模拟数值

器材

• 1x Tequila Nano + RA_LINK 调试器

• 1x 电位器

• 3x 杜邦线

电路连接

Tequila Nano	电位器
PA0	Sig (信号)
3V3	3V3
GND	GND

电路连接

原理

代码

/**
 * @file main.c
 * @version 1.0
 * @date 2021-07-27
 *
 */

#include "Rath_HAL.h"

static void AG_RCU_init(void);
static void AG_GPIO_init(void);
static void AG_ADC0_init(void);
static void AG_USART0_init(void);

int main(void) {
  AG_RCU_init();
  AG_GPIO_init();
  AG_ADC0_init();
  AG_USART0_init();

  while (1) {
    uint16_t adc_channel_0_data = 0;
    uint16_t adc_channel_1_data = 0;

    ADC_ChannelInitTypeDef ADC0_channel_init;

    ADC0_channel_init.channel = ADC_CHANNEL_0;
    ADC0_channel_init.rank = ADC_RANK_0;
    ADC0_channel_init.sample_time = ADC_SAMPLETIME_1POINT5;
    HAL_ADC_initChannel(ADC0, &ADC0_channel_init);

    HAL_ADC_startConversion(ADC0, 0);
    adc_channel_0_data = HAL_ADC_read(ADC0);

    ADC0_channel_init.channel = ADC_CHANNEL_1;
    ADC0_channel_init.rank = ADC_RANK_0;
    ADC0_channel_init.sample_time = ADC_SAMPLETIME_1POINT5;
    HAL_ADC_initChannel(ADC0, &ADC0_channel_init);

    HAL_ADC_startConversion(ADC0, 0);
    adc_channel_1_data = HAL_ADC_read(ADC0);

    printf("ADC channel 0: %u\tchannel 1: %u\n", adc_channel_0_data, adc_channel_1_data);

    HAL_delay(20);
  }
}

static void AG_RCU_init(void) {
  HAL_RCU_initDefaultSystemClock();

  HAL_RCU_resetPeriphClock(RCU_GPIOA);
  HAL_RCU_resetPeriphClock(RCU_ADC0);
  HAL_RCU_resetPeriphClock(RCU_USART0);
  
  HAL_RCU_setADCPrescaler(RCU_ADCPRESCALER_DIV_8);

  HAL_RCU_enablePeriphClock(RCU_GPIOA);
  HAL_RCU_enablePeriphClock(RCU_ADC0);
  HAL_RCU_enablePeriphClock(RCU_USART0);
}

static void AG_GPIO_init(void) {
  GPIO_InitTypeDef GPIO_init;

  GPIO_init.pin = GPIO_PIN_0 | GPIO_PIN_1;
  GPIO_init.mode = GPIO_MODE_ANALOG;
  GPIO_init.pull = GPIO_PULL_NONE;
  GPIO_init.speed = GPIO_SPEED_NONE;
  HAL_GPIO_init(GPIOA, &GPIO_init);

  GPIO_init.pin = GPIO_PIN_9;
  GPIO_init.mode = GPIO_MODE_AF_PP;
  GPIO_init.pull = GPIO_PULL_NONE;
  GPIO_init.speed = GPIO_SPEED_50MHZ;
  HAL_GPIO_init(GPIOA, &GPIO_init);

  GPIO_init.pin = GPIO_PIN_10;
  GPIO_init.mode = GPIO_MODE_INPUT;
  GPIO_init.pull = GPIO_PULL_NONE;
  GPIO_init.speed = GPIO_SPEED_NONE;
  HAL_GPIO_init(GPIOA, &GPIO_init);
}

static void AG_ADC0_init(void) {
  HAL_ADC_disable(ADC0);

  ADC_InitTypeDef ADC0_init;

  ADC0_init.mode = ADC_MODE_FREE;
  ADC0_init.data_align = ADC_DATAALIGN_RIGHT;
  ADC0_init.scan_mode = DISABLE;
  ADC0_init.continuous_mode = DISABLE;
  ADC0_init.discontinuous_mode = DISABLE;
  ADC0_init.trigger_source = ADC_TRIGGERSOURCE_REGULAR_SOFTWARE;
  ADC0_init.conversion_length = 1;
  ADC0_init.inserted_discontinuous_mode = DISABLE;
  ADC0_init.inserted_trigger_source = ADC_TRIGGERSOURCE_INSERTED_SOFTWARE;
  ADC0_init.inserted_conversion_length = 0;
  ADC0_init.auto_insertion_mode = DISABLE;
  HAL_ADC_init(ADC0, &ADC0_init);

  ADC_ChannelInitTypeDef ADC0_channel_init;

  ADC0_channel_init.channel = ADC_CHANNEL_0;
  ADC0_channel_init.rank = ADC_RANK_0;
  ADC0_channel_init.sample_time = ADC_SAMPLETIME_1POINT5;
  ADC0_channel_init.insersion_offset = 0;
  HAL_ADC_initChannel(ADC0, &ADC0_channel_init);

  HAL_ADC_enable(ADC0);
}

static void AG_USART0_init(void) {
  HAL_USART_disable(USART0);

  USART_InitTypeDef USART0_init;

  USART0_init.mode = USART_MODE_TX_RX;
  USART0_init.baudrate = 115200UL;
  USART0_init.word_length = USART_WORDLENGTH_8BIT;
  USART0_init.stop_bits = USART_STOPBITS_1BIT;
  USART0_init.parity = USART_PARITY_NONE;
  USART0_init.hw_control = USART_HWCONTROL_NONE;
  HAL_USART_init(USART0, &USART0_init);

  HAL_USART_enable(USART0);
}