//
// Created by hu123456 on 2024/3/8.
//

#include "vcc_adc.h"

void adc_init(void)
{
    HAL_ADCEx_Calibration_Start(&hadc1, ADC_CALIB_OFFSET, ADC_SINGLE_ENDED);
}

uint32_t adc_get_result(void)
{
    ADC_ChannelConfTypeDef adc_ch_conf = {0};

    adc_ch_conf.Channel = ADC_CHANNEL_8;
    adc_ch_conf.Rank = ADC_REGULAR_RANK_1;
    adc_ch_conf.SamplingTime = ADC_SAMPLETIME_810CYCLES_5;
    adc_ch_conf.SingleDiff = ADC_SINGLE_ENDED;
    adc_ch_conf.OffsetNumber = ADC_OFFSET_NONE;
    adc_ch_conf.Offset = 0;
    HAL_ADC_ConfigChannel(&hadc1, &adc_ch_conf);

    HAL_ADC_Start(&hadc1);
    HAL_ADC_PollForConversion(&hadc1, 10);
    return HAL_ADC_GetValue(&hadc1);
}

float get_VCC(void)
{
    uint32_t temp_val = 0;
    float vcc;
    for (uint8_t t = 0; t < 10; t++)
    {
        temp_val += adc_get_result();
        HAL_Delay(5);
    }
    vcc = temp_val/10.f/65535.f * 3.3 * 11.f;
    return vcc;
}