adc.c File Reference

#include "adc.h"
#include "stm32f4xx_hal.h"

Macros
#define	ADC_SIM_MSK   0

Functions
void	ADC_READY (uint8_t index)
uint8_t	ADC_SEQ2IDX (uint8_t seq)
void	Error_Handler (void)
	This function is executed in case of error occurrence. More...
void	adc_init_sim_vals (void)
uint8_t	adc_chan (uint8_t idx)
void	adc_set_mux (uint8_t chn)
void	adc_init (void)
void	adc_cycle (void)

Variables
ADC_HandleTypeDef	hadc1
uint32_t	adc_val [ADC_CHAN_CNT]
uint8_t	adc_cnt [ADC_CHAN_CNT]
uint8_t	adc_chn [ADC_CHAN_CNT]
uint8_t	adc_sta = 0xff
int8_t	adc_idx = 0
uint32_t	adc_sim_val [ADC_CHAN_CNT]
uint32_t	adc_sim_msk = ADC_SIM_MSK

Macro Definition Documentation

ADC_SIM_MSK

#define ADC_SIM_MSK   0

Function Documentation

ADC_READY()

void ADC_READY

(

uint8_t

index

)

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ADC_SEQ2IDX()

uint8_t ADC_SEQ2IDX

(

uint8_t

seq

)

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Error_Handler()

void Error_Handler

(

void

)

This function is executed in case of error occurrence.

Return values

None

                         {
    /* USER CODE BEGIN Error_Handler_Debug */
    /* User can add his own implementation to report the HAL error return state */
    app_error();
    /* USER CODE END Error_Handler_Debug */
}

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adc_init_sim_vals()

void adc_init_sim_vals

(

void

)

                             {
#ifdef ADC_SIM_VAL0
    adc_sim_val[0] = ADC_SIM_VAL0;
#endif //ADC_SIM_VAL0
#ifdef ADC_SIM_VAL1
    adc_sim_val[1] = ADC_SIM_VAL1;
#endif //ADC_SIM_VAL1
#ifdef ADC_SIM_VAL2
    adc_sim_val[2] = ADC_SIM_VAL2;
#endif //ADC_SIM_VAL2
#ifdef ADC_SIM_VAL3
    adc_sim_val[3] = ADC_SIM_VAL3;
#endif //ADC_SIM_VAL3
#ifdef ADC_SIM_VAL4
    adc_sim_val[4] = ADC_SIM_VAL4;
#endif //ADC_SIM_VAL4
#ifdef ADC_SIM_VAL5
    adc_sim_val[5] = ADC_SIM_VAL5;
#endif //ADC_SIM_VAL4
}

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adc_chan()

uint8_t adc_chan

(

uint8_t

idx

)

                              {
    uint8_t chan = 0;
    uint16_t mask = 1;
    while (mask) {
        if ((mask & ADC_CHAN_MSK) && (idx-- == 0))
            break;
        mask <<= 1;
        chan++;
    }
    return chan;
}

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adc_set_mux()

void adc_set_mux

(

uint8_t

chn

)

                              {
    ADC_ChannelConfTypeDef sConfig = { 0 };
    sConfig.Channel = chn;
    sConfig.Rank = 1;
    sConfig.SamplingTime = ADC_SAMPLETIME_3CYCLES;
    if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK) {
        Error_Handler();
    }
}

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adc_init()

void adc_init

(

void

)

                    {
    for (int i = 0; i < ADC_CHAN_CNT; i++) {
        adc_val[i] = 0;
        adc_cnt[i] = 0;
        adc_chn[i] = adc_chan(i);
    }
    adc_idx = 0;
    adc_sta = 0x00;
    adc_init_sim_vals();
}

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adc_cycle()

void adc_cycle

(

void

)

                     {
    uint8_t seq;
    uint32_t val;
    if (adc_sta == 0xff)
        return; //skip sampling if not initialized
    if (adc_sta & 0x80) {
        if (__HAL_ADC_GET_FLAG(&hadc1, ADC_FLAG_EOC)) {
            if ((1 << adc_idx) & adc_sim_msk)
                val = adc_sim_val[adc_idx];
            else
                val = HAL_ADC_GetValue(&hadc1);
            adc_val[adc_idx] += val;
            if (++adc_cnt[adc_idx] >= ADC_OVRSAMPL) {
                ADC_READY(adc_idx);
                adc_val[adc_idx] = 0;
                adc_cnt[adc_idx] = 0;
            }
            seq = (adc_sta & 0x1f) + 1;
            if (seq >= ADC_SEQ_LEN)
                seq = 0;
            adc_idx = ADC_SEQ2IDX(seq);
            adc_set_mux(adc_chn[adc_idx]);
            adc_sta = seq;
        } else {
            Error_Handler();
        }
    } else {
        HAL_ADC_Start(&hadc1);
        adc_sta |= 0x80;
    }
}

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Variable Documentation

hadc1

ADC_HandleTypeDef hadc1

adc_val

uint32_t adc_val[ADC_CHAN_CNT]

adc_cnt

uint8_t adc_cnt[ADC_CHAN_CNT]

adc_chn

uint8_t adc_chn[ADC_CHAN_CNT]

adc_sta

uint8_t adc_sta = 0xff

adc_idx

int8_t adc_idx = 0

adc_sim_val

uint32_t adc_sim_val[ADC_CHAN_CNT]

adc_sim_msk

uint32_t adc_sim_msk = ADC_SIM_MSK