stm32-k-type-thermocouple-amplification-using-ad8495

/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include"stdio.h"
#include<string.h>
/* Private variables ---------------------------------------------------------*/
ADC_HandleTypeDef hadc1;
UART_HandleTypeDef huart1;

/* USER CODE BEGIN PV */
int val = 0; // Variable to store the value read
float TempC; // Temperature value in Celsius degree
float TempF; // Temperature value in Fahrenheit degree
float gain = (3.3/(4096-1)) ; // gain = STM23_Vref/(2^12-1) STM32 ADC 12bit resolution
float vref = 2.5; //  datasheet : Reference  value 2.5V for adjustment
float Output_Voltage= 0.005; // datasheet : 5 mV/°C for J type and K type
char buffer[100];
/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_ADC1_Init(void);
static void MX_USART1_UART_Init(void);

int main(void)
{
HAL_Init();
SystemClock_Config();
MX_GPIO_Init();
MX_ADC1_Init();
MX_USART1_UART_Init();

/* USER CODE BEGIN 2 */
if(HAL_ADC_Start(&hadc1)!=HAL_OK)
{
Error_Handler();
}
/* USER CODE END 2 */

while (1)
{
while(HAL_ADC_PollForConversion(&hadc1, HAL_MAX_DELAY)!=HAL_OK)
{
Error_Handler();
}
val = HAL_ADC_GetValue(&hadc1); // Read the input from ADC
TempC = (( (float)(val) * gain)-vref)/ Output_Voltage; // -ref Convert ADC value to Celsius degree
TempF = (TempC * 1.8) + 32.0;
sprintf(buffer, "Temperature: %.2f Degrees Celsius, %.2f  Degrees Fahrenheit\r\n", TempC,TempF);
HAL_UART_Transmit(&huart1, (uint8_t *)buffer, strlen(buffer), HAL_MAX_DELAY);
HAL_Delay(500);
}
}