bt-67xx_universal_hw/modules/stm32_temperature/stm32_temperature.c

/*
 * stm32_temperature.c
 *
 *  Created on: 07.11.2023
 *      Author: balbekova
 */

#include "common_config.h"

#include "FreeRTOS.h"
#include "task.h"

#include <stm32f4xx.h>
#include <stm32f4xx_rcc.h>
#include <stm32f4xx_adc.h>

#include "megatec.h"

#ifdef PRINTF_STDLIB
#include <stdio.h>
#endif
#ifdef PRINTF_CUSTOM
#include "tinystdio.h"
#endif
#include <string.h>
#include <stdlib.h>


#define DBG if (0)


#define TEMPERATURE_SHIFT           15


void adc_init() {
       ADC_InitTypeDef ADC_InitStruct;
       ADC_CommonInitTypeDef ADC_CommonInitStruct;

       /* сбрасываем настройки АЦП */
       ADC_DeInit();

       RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);



       ADC_CommonInitStruct.ADC_Mode = ADC_Mode_Independent;
        ADC_CommonInitStruct.ADC_Prescaler = ADC_Prescaler_Div8;
        ADC_CommonInitStruct.ADC_DMAAccessMode = ADC_DMAAccessMode_Disabled;
        ADC_CommonInitStruct.ADC_TwoSamplingDelay = ADC_TwoSamplingDelay_5Cycles;
        ADC_CommonInit(&ADC_CommonInitStruct);

        ADC_InitStruct.ADC_Resolution = ADC_Resolution_12b;
        ADC_InitStruct.ADC_ScanConvMode = DISABLE;
        ADC_InitStruct.ADC_ContinuousConvMode = ENABLE;
        ADC_InitStruct.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None;
        ADC_InitStruct.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T1_CC1;
        ADC_InitStruct.ADC_DataAlign = ADC_DataAlign_Right;
        ADC_InitStruct.ADC_NbrOfConversion = 1;
        ADC_Init(ADC1, &ADC_InitStruct);

        ADC_RegularChannelConfig(ADC1, ADC_Channel_TempSensor, 1, ADC_SampleTime_144Cycles);

        ADC_TempSensorVrefintCmd(ENABLE);
        ADC_Cmd(ADC1, ENABLE);


}


u16 readADC1(u8 channel){
   // начинаем работу
   ADC_SoftwareStartConv(ADC1);
   // ждём пока преобразуется напряжение в код
   while(ADC_GetFlagStatus(ADC1, ADC_FLAG_EOC) == RESET);
   // возвращаем результат
   return ADC_GetConversionValue(ADC1);
}


//void stm32_temperature_meas(void)
void stm32_temperature_meas(void *params)
{
    float adc_temperature;
    for (;;) {
        adc_temperature = readADC1(16);
        adc_temperature *= 3300;
        adc_temperature /= 0xfff; //Reading in mV
        adc_temperature /= 1000.0; //Reading in Volts
        adc_temperature -= 0.760; // Subtract the reference voltage at 25°C
        adc_temperature /= .0025; // Divide by slope 2.5mV

        adc_temperature += 25.0; // Add the 25°C
       UPS.temp_stm32 = adc_temperature - TEMPERATURE_SHIFT;
       printf("stm32_temperature %0.1f\r\n", UPS.temp_stm32);
        vTaskDelay(5000);
    }
}

void stm32_temperature_init(void)
{
    adc_init();
    xTaskCreate(stm32_temperature_meas, ( char * ) "stm32_temperature_meas", configMINIMAL_STACK_SIZE * 2, NULL, tskIDLE_PRIORITY, NULL);
}