/* Includes ------------------------------------------------------------------*/
#include "main.h"
/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include "LiquidCrystal.h"
#include"stdio.h"
#include"math.h"
/* USER CODE END Includes */
/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
/* Calibration Parameters */
#define ADC_RESOLUTION 4095 // 12-bit ADC resolution
#define ADC_VOLTAGE_RANGE 5.0f // Voltage range of ADC in volts
#define PRESSURE_MIN 0.0 // Minimum pressure in kPa
#define VOLTAGE_MIN 0.25 // Corresponding minimum voltage in V
#define PRESSURE_MAX 250.0f // Maximum pressure in kPa
#define VOLTAGE_MAX 4.87 // Corresponding maximum voltage in V
/* UART Message Strings */
#define MSG_OK "Operation successful.\n\r"
#define MSG_NOT_OK "Operation failed.\n\r"
/* Private variables ---------------------------------------------------------*/
ADC_HandleTypeDef hadc1;
UART_HandleTypeDef huart1;
/* USER CODE BEGIN PV */
/* Global Variables */
char uartMsg[50]; // UART message buffer
/* USER CODE END PV */
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_USART1_UART_Init(void);
static void MX_ADC1_Init(void);
int main(void)
{
/* USER CODE BEGIN 1 */
float sensitivity = (PRESSURE_MAX - PRESSURE_MIN) / (VOLTAGE_MAX - VOLTAGE_MIN);
float offset = PRESSURE_MIN - (sensitivity * VOLTAGE_MIN);
float resolution = ADC_VOLTAGE_RANGE / ADC_RESOLUTION;
/* USER CODE END 1 */
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
HAL_Init();
/* Configure the system clock */
SystemClock_Config();
/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_USART1_UART_Init();
MX_ADC1_Init();
/* USER CODE BEGIN 2 */
LiquidCrystal(GPIOB, GPIO_PIN_3,GPIO_PIN_4,GPIO_PIN_5,GPIO_PIN_6 ,GPIO_PIN_7,GPIO_PIN_8,GPIO_PIN_9);
begin(20,4);
/* USER CODE END 2 */
/* USER CODE BEGIN WHILE */
while (1)
{
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
HAL_ADC_Start(&hadc1);
// Wait for the conversion to complete (timeout: 1 second)
if (HAL_ADC_PollForConversion(&hadc1, 1000) != HAL_OK)
HAL_UART_Transmit(&huart1, (uint8_t *)MSG_NOT_OK, sizeof(MSG_NOT_OK), 100);
else
{
HAL_UART_Transmit(&huart1, (uint8_t *)MSG_OK, sizeof(MSG_OK), 100);
// Read the ADC value
int adc_value = HAL_ADC_GetValue(&hadc1);
// Convert ADC value to pressure using calibration parameters
float pressure_kPa = (adc_value * resolution * sensitivity) + offset;
float pressure_mbar = pressure_kPa * 10; // Convert kPa to mbar
setCursor(0, 0);
print("Pressure Value=");
setCursor(0, 1);
sprintf(uartMsg, "%.1f", pressure_kPa);
print(uartMsg);
setCursor(7, 1);
print("kPa");
setCursor(0, 2);
sprintf(uartMsg, "%.1f", pressure_mbar);
print(uartMsg);
setCursor(7, 2);
print("Mbar");
HAL_Delay(1000);
clear();
}
HAL_ADC_Stop(&hadc1);
}
/* USER CODE END 3 */
}