STM32 - Medición de temperatura basada en ADC en FreeRTOS

He estado tratando de medir la temperatura de la MCU (STM32F103RB) como parte de una aplicación FreeRTOS. He intentado inicializar el ADC con las funciones HAL de bajo y alto nivel, pero cada vez que trato de obtener datos, la variable que los almacena tiene un valor de aproximadamente 68 (cuando normalmente debería estar entre 1500 y 1600 a temperatura ambiente). ). ¿Alguna idea?

El código sigue aquí: TempMsr.c - HAL

#include "Peripherals/TempMsr.h"

volatile int32_t sensorData = 0;
volatile int32_t temp = 0;
ADC_HandleTypeDef adc1_config;
ADC_ChannelConfTypeDef adc1_channel;

int32_t getTemp()
{
    sensorData = HAL_ADC_GetValue(&adc1_config);
    temp = (int32_t)( ( (10 * V25 - 8 * sensorData) / (AVGSLOPE * 10) ) + 25 + BIAS);
    //manufacturer's formula for determining the temperature in Celsius, adjusted for unit
    //compliance and for minimizing errors due to possible floating-point operations
    return sensorData;
}

void ADC_TempMsr_Init()
{
    ADC_Config();
    HAL_ADC_Init(&adc1_config);
    HAL_ADC_ConfigChannel(&adc1_config, &adc1_channel);
}

void ADC_Config()
{
    adc1_config.Instance = ADC1;
    adc1_config.Init.ScanConvMode = ADC_SCAN_DISABLE;
    adc1_config.Init.ContinuousConvMode = ENABLE;
    adc1_config.Init.DiscontinuousConvMode = DISABLE;
    adc1_config.Init.ExternalTrigConv = ADC_SOFTWARE_START;
    adc1_config.Init.DataAlign = ADC_DATAALIGN_RIGHT;
    adc1_config.Init.NbrOfConversion = 1;

    adc1_channel.Channel = ADC_CHANNEL_TEMPSENSOR;
    adc1_channel.Rank = ADC_REGULAR_RANK_1;
    adc1_channel.SamplingTime = ADC_SAMPLETIME_239CYCLES_5;  //~17 us, manufacturer-suggested time for temp sampling
}

TempMsr.c - Low-level :

void ADC_TempMsr_Init()
{
    ADC_Config();

    LL_ADC_Enable(ADC1);

    LL_ADC_StartCalibration(ADC1);
}

void ADC_Config()
{
    LL_APB2_GRP1_EnableClock(LL_APB2_GRP1_PERIPH_ADC1);  //enable the clock for ADC1

    LL_ADC_SetCommonPathInternalCh(__LL_ADC_COMMON_INSTANCE(ADC1), LL_ADC_PATH_INTERNAL_TEMPSENSOR);
    uint32_t wait_loop_index = 80;  //CPU cycles which correspond to ~10 us, suggested stabilization time for temp.sensor stabilization

    while(wait_loop_index != 0)
    {
        wait_loop_index--;
    }

    /* Set ADC group regular trigger source */
    LL_ADC_REG_SetTriggerSource(ADC1, LL_ADC_REG_TRIG_SOFTWARE);

    /* Set ADC group regular continuous mode */
    LL_ADC_REG_SetContinuousMode(ADC1, LL_ADC_REG_CONV_SINGLE);

    /* Set ADC group regular sequencer length and scan direction */
    LL_ADC_REG_SetSequencerLength(ADC1, LL_ADC_REG_SEQ_SCAN_DISABLE);

    /* Set ADC group regular sequence: channel on the selected sequence rank. */
    LL_ADC_REG_SetSequencerRanks(ADC1, LL_ADC_REG_RANK_1, LL_ADC_CHANNEL_TEMPSENSOR);

    LL_ADC_SetChannelSamplingTime(ADC1, LL_ADC_CHANNEL_16, LL_ADC_SAMPLINGTIME_239CYCLES_5);
}

El archivo de encabezado correspondiente ( TempMsr.h ):

#ifndef INC_TEMPMSR_H_
#define INC_TEMPMSR_H_

#include "stm32f1xx_hal.h"
//#include "stm32f1xx_ll_adc.h"
//#include "stm32f1xx_ll_bus.h"

#define AVGSLOPE 4.3
//average slope of T-V chart according to datasheet pg 79
//(min is 4 mV/C, max 4.6, default (4.3): typical)

#define V25 1430
//voltage of temperature sensor at 25C according to datasheet pg 79 (in mV)
//(min is 1340, max is 1520, default(1430): typical)

#define BIAS 20
//according to the manual (pg 235), due to mfg processes
//there is an offset in the V(T) plot different
//to every chip (up to +-45oC) that needs to be found.
//(default is 0 so it MUST be calculated before any meaningful measurements
//are made)

int32_t getTemp();  //returns current MCU temp. in Celsius
void ADC_TempMsr_Init();  //initializes the ADC, this needs to be run in prvHardwareSetup()
void ADC_Config();

Finalmente, la tarea de FreeRTOS:

void vTempTask(void *pvParameters)
{
    while(1)
    {
        xSensorData.temp = getTemp();  //continually update the appropriate variable inside the sensor data struct
        vTaskDelay(pdMS_TO_TICKS(1000));   //1 second per measurement is enough
    }
}

Gracias de antemano.