LcdRgbTemp.c

/*******************************************************************************
 * File Name          : main.c
 * Description        : program to measure the room temperature and display the temperature in Celsius or in Fahrenheit (with the push of a button) on LCD.
 *                      Common Anode RGB LED will illuminate for
 	 	 	 	 	    Below -15 C       white
 	 	 	 	 	 	-15 C  to 5.0 C    blue
 	 	 	 	 	 	5.1 C to 15 C      yellow
 	 	 	 	 	 	15.1 C to 25 C    orange
 	 	 	 	 	 	Above 25.1 C      red
                        A 10k potentiometer is used to demonstrate different temperatures.
 * Author:              Deep Shah
 * Date:                25th July 2021
 ******************************************************************************
 */
/* Includes ------------------------------------------------------------------*/
#include "main.h"

/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include<stdio.h>
/* USER CODE END Includes */

/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */

/* USER CODE END PTD */

/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
/* USER CODE END PD */

/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */
#define BUFF_SIZE 17
/* USER CODE END PM */

/* Private variables ---------------------------------------------------------*/
ADC_HandleTypeDef hadc1;

TIM_HandleTypeDef htim1;

UART_HandleTypeDef huart2;

/* USER CODE BEGIN PV */

/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_USART2_UART_Init(void);
static void MX_TIM1_Init(void);
static void MX_ADC1_Init(void);
/* USER CODE BEGIN PFP */
void tempMeasure(int rawADC);
void glowRGB(void);
void set_rgb(uint8_t red, uint8_t green, uint8_t blue);
void HD44780_Init(void);
void HD44780_PutChar(unsigned char c);
void HD44780_GotoXY(unsigned char x, unsigned char y);
void HD44780_PutStr(char *str);
void HD44780_ClrScr(void);

/* USER CODE END PFP */

/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
GPIO_PinState userButton;
char lcdBuffer[BUFF_SIZE] = { 0 };
float tempCelsius, tempFahrenheit;
int countCelsius, countFahrenheit;
int bufferCelsius, bufferFahrenheit;
int posX = 15;
/* USER CODE END 0 */

/**
 * @brief  The application entry point.
 * @retval int
 */
int main(void) {
	/* USER CODE BEGIN 1 */
//	GPIO_PinState User_Button;
	/* USER CODE END 1 */

	/* MCU Configuration--------------------------------------------------------*/

	/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
	HAL_Init();

	/* USER CODE BEGIN Init */

	/* USER CODE END Init */

	/* Configure the system clock */
	SystemClock_Config();

	/* USER CODE BEGIN SysInit */

	/* USER CODE END SysInit */

	/* Initialize all configured peripherals */
	MX_GPIO_Init();
	MX_USART2_UART_Init();
	MX_TIM1_Init();
	MX_ADC1_Init();
	/* USER CODE BEGIN 2 */
	HAL_TIM_PWM_Start(&htim1, TIM_CHANNEL_1);
	HAL_TIM_PWM_Start(&htim1, TIM_CHANNEL_2);
	HAL_TIM_PWM_Start(&htim1, TIM_CHANNEL_3);
	HD44780_Init();
	printf("ADC code\r\n");

	__IO uint16_t uhADCxConvertedValue = 0; //_

	/* USER CODE END 2 */

	/* Infinite loop */
	/* USER CODE BEGIN WHILE */

	while (1) {

		if (HAL_ADC_Start(&hadc1) != HAL_OK) {
			/* Start Conversation Error */
			printf("HAL_ADC_Start Error\r\n");
		}
		if (HAL_ADC_PollForConversion(&hadc1, 10) != HAL_OK) {
			printf("HAL_ADC_PollForConversion Error\r\n");
		} else {
			/* ADC conversion completed */
			/*##-5- Get the converted value of regular channel  ########################*/
			uhADCxConvertedValue = HAL_ADC_GetValue(&hadc1);
		}
		tempMeasure(uhADCxConvertedValue); //pass the raw integer adc value to the temp measure function
		/* USER CODE END WHILE */

		/* USER CODE BEGIN 3 */
	}
	/* USER CODE END 3 */
}
// FUNCTION      : tempMeasure
// DESCRIPTION   : main function to measure the room temperature
// PARAMETERS    : int rawADC (raw ADC values from the sensor)
// RETURNS       : void
void tempMeasure(int rawADC) {
	userButton = HAL_GPIO_ReadPin(GPIOA, GPIO_PIN_1); // button to convert  celsius to fahrenheit
	tempCelsius = ((3.3 / 4095.0 * rawADC * 1000.0) - 500.0) / 10.0; // convert raw adc to temp in celsius
	bufferCelsius = tempCelsius; // temporary variable to store temp
	bufferCelsius = (int) bufferCelsius; // convert float temp to int
	if (userButton == GPIO_PIN_RESET) { // temp is in celsius if push button not pressed
		countCelsius = 0;               // reset the counter
		while (bufferCelsius != 0) { // loop to calculate number of digits in the temp
			bufferCelsius /= 10;
			++countCelsius;
		}
		HD44780_ClrScr(); //clear the LCD to avoid repetition of characters
		//code to place the temp in top right corner
		if (tempCelsius > 0) {
			HD44780_GotoXY(posX - countCelsius - 2, 0); //if temp positive
			snprintf(lcdBuffer, BUFF_SIZE, "%.1fC", tempCelsius);
			HD44780_PutStr(lcdBuffer);
		} else {

			HD44780_GotoXY(posX - countCelsius - 3, 0);
			snprintf(lcdBuffer, BUFF_SIZE, "%.1fC", tempCelsius); //if temp negative
			HD44780_PutStr(lcdBuffer);
		}
	} else { //if push button is pressed display in Fahrenheit
		tempFahrenheit = ((tempCelsius * 9.0 / 5.0) + 32.0); //convert celsius to fahrenheit
		bufferFahrenheit = tempFahrenheit; // temporary variable to store temp
		bufferFahrenheit = (int) bufferFahrenheit; // convert float temp to int
		countFahrenheit = 0;  // reset the counter
		while (bufferFahrenheit != 0) { // loop to calculate number of digits in the temp
			bufferFahrenheit /= 10;
			++countFahrenheit;
		}
		HD44780_ClrScr(); //clear the LCD to avoid repetition of characters
		//code to place the temp in top right corner
		if (tempFahrenheit > 0) {
			HD44780_GotoXY(posX - countFahrenheit - 2, 0); //if temp positive
			snprintf(lcdBuffer, BUFF_SIZE, "%.1fF", tempFahrenheit);
			HD44780_PutStr(lcdBuffer);
		} else {
			HD44780_GotoXY(posX - countFahrenheit - 3, 0); //if temp negative
			snprintf(lcdBuffer, BUFF_SIZE, "%.1fF", tempFahrenheit);
			HD44780_PutStr(lcdBuffer);
		}

	}
	glowRGB();
}
// FUNCTION      : glowRGB
// DESCRIPTION   : illuminate the RGB (Common Anode) based on the temperature
// PARAMETERS    : none
// RETURNS       : void
void glowRGB() {
	if (tempCelsius < -15.0) {
		set_rgb(0, 0, 0); //white
	} else if (tempCelsius > -15.0 && tempCelsius < 5.0) {
		set_rgb(255, 255, 0);  //blue
	} else if (tempCelsius > 5.1 && tempCelsius < 15.0) {
		set_rgb(0, 0, 255);   //yellow
	} else if (tempCelsius > 15.1 && tempCelsius < 25.0) {
		set_rgb(0, 90, 255); //orange
	} else if (tempCelsius > 25.1) {
		set_rgb(0, 255, 255);   //red
	}
	HAL_Delay(1000);
}
// FUNCTION      : set_rgb
// DESCRIPTION   : set the three terminals of LED based on the required colour
// PARAMETERS    : uint8_t red, uint8_t green, uint8_t blue (rgb colour codes)
// RETURNS       : void
void set_rgb(uint8_t red, uint8_t green, uint8_t blue) {
	htim1.Instance->CCR1 = red;
	htim1.Instance->CCR2 = green;
	htim1.Instance->CCR3 = blue;
}

/**
 * @brief System Clock Configuration
 * @retval None
 */
void SystemClock_Config(void) {
	RCC_OscInitTypeDef RCC_OscInitStruct = { 0 };
	RCC_ClkInitTypeDef RCC_ClkInitStruct = { 0 };
	RCC_PeriphCLKInitTypeDef PeriphClkInit = { 0 };

	/** Configure LSE Drive Capability
	 */
	HAL_PWR_EnableBkUpAccess();
	__HAL_RCC_LSEDRIVE_CONFIG(RCC_LSEDRIVE_LOW);
	/** Initializes the RCC Oscillators according to the specified parameters
	 * in the RCC_OscInitTypeDef structure.
	 */
	RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSE
			| RCC_OSCILLATORTYPE_MSI;
	RCC_OscInitStruct.LSEState = RCC_LSE_ON;
	RCC_OscInitStruct.MSIState = RCC_MSI_ON;
	RCC_OscInitStruct.MSICalibrationValue = 0;
	RCC_OscInitStruct.MSIClockRange = RCC_MSIRANGE_6;
	RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
	RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_MSI;
	RCC_OscInitStruct.PLL.PLLM = 1;
	RCC_OscInitStruct.PLL.PLLN = 16;
	RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV7;
	RCC_OscInitStruct.PLL.PLLQ = RCC_PLLQ_DIV2;
	RCC_OscInitStruct.PLL.PLLR = RCC_PLLR_DIV2;
	if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
		Error_Handler();
	}
	/** Initializes the CPU, AHB and APB buses clocks
	 */
	RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_SYSCLK
			| RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2;
	RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
	RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
	RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
	RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;

	if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1) != HAL_OK) {
		Error_Handler();
	}
	PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USART2
			| RCC_PERIPHCLK_ADC;
	PeriphClkInit.Usart2ClockSelection = RCC_USART2CLKSOURCE_PCLK1;
	PeriphClkInit.AdcClockSelection = RCC_ADCCLKSOURCE_PLLSAI1;
	PeriphClkInit.PLLSAI1.PLLSAI1Source = RCC_PLLSOURCE_MSI;
	PeriphClkInit.PLLSAI1.PLLSAI1M = 1;
	PeriphClkInit.PLLSAI1.PLLSAI1N = 8;
	PeriphClkInit.PLLSAI1.PLLSAI1P = RCC_PLLP_DIV7;
	PeriphClkInit.PLLSAI1.PLLSAI1Q = RCC_PLLQ_DIV2;
	PeriphClkInit.PLLSAI1.PLLSAI1R = RCC_PLLR_DIV2;
	PeriphClkInit.PLLSAI1.PLLSAI1ClockOut = RCC_PLLSAI1_ADC1CLK;
	if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK) {
		Error_Handler();
	}
	/** Configure the main internal regulator output voltage
	 */
	if (HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1)
			!= HAL_OK) {
		Error_Handler();
	}
	/** Enable MSI Auto calibration
	 */
	HAL_RCCEx_EnableMSIPLLMode();
}

/**
 * @brief ADC1 Initialization Function
 * @param None
 * @retval None
 */
static void MX_ADC1_Init(void) {

	/* USER CODE BEGIN ADC1_Init 0 */

	/* USER CODE END ADC1_Init 0 */

	ADC_ChannelConfTypeDef sConfig = { 0 };

	/* USER CODE BEGIN ADC1_Init 1 */

	/* USER CODE END ADC1_Init 1 */
	/** Common config
	 */
	hadc1.Instance = ADC1;
	hadc1.Init.ClockPrescaler = ADC_CLOCK_ASYNC_DIV1;
	hadc1.Init.Resolution = ADC_RESOLUTION_12B;
	hadc1.Init.DataAlign = ADC_DATAALIGN_RIGHT;
	hadc1.Init.ScanConvMode = ADC_SCAN_DISABLE;
	hadc1.Init.EOCSelection = ADC_EOC_SINGLE_CONV;
	hadc1.Init.LowPowerAutoWait = DISABLE;
	hadc1.Init.ContinuousConvMode = DISABLE;
	hadc1.Init.NbrOfConversion = 1;
	hadc1.Init.DiscontinuousConvMode = DISABLE;
	hadc1.Init.ExternalTrigConv = ADC_SOFTWARE_START;
	hadc1.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
	hadc1.Init.DMAContinuousRequests = DISABLE;
	hadc1.Init.Overrun = ADC_OVR_DATA_PRESERVED;
	hadc1.Init.OversamplingMode = DISABLE;
	if (HAL_ADC_Init(&hadc1) != HAL_OK) {
		Error_Handler();
	}
	/** Configure Regular Channel
	 */
	sConfig.Channel = ADC_CHANNEL_5;
	sConfig.Rank = ADC_REGULAR_RANK_1;
	sConfig.SamplingTime = ADC_SAMPLETIME_2CYCLES_5;
	sConfig.SingleDiff = ADC_SINGLE_ENDED;
	sConfig.OffsetNumber = ADC_OFFSET_NONE;
	sConfig.Offset = 0;
	if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK) {
		Error_Handler();
	}
	/* USER CODE BEGIN ADC1_Init 2 */

	/* USER CODE END ADC1_Init 2 */

}

/**
 * @brief TIM1 Initialization Function
 * @param None
 * @retval None
 */
static void MX_TIM1_Init(void) {

	/* USER CODE BEGIN TIM1_Init 0 */

	/* USER CODE END TIM1_Init 0 */

	TIM_ClockConfigTypeDef sClockSourceConfig = { 0 };
	TIM_MasterConfigTypeDef sMasterConfig = { 0 };
	TIM_OC_InitTypeDef sConfigOC = { 0 };
	TIM_BreakDeadTimeConfigTypeDef sBreakDeadTimeConfig = { 0 };

	/* USER CODE BEGIN TIM1_Init 1 */

	/* USER CODE END TIM1_Init 1 */
	htim1.Instance = TIM1;
	htim1.Init.Prescaler = 0;
	htim1.Init.CounterMode = TIM_COUNTERMODE_UP;
	htim1.Init.Period = 255;
	htim1.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
	htim1.Init.RepetitionCounter = 0;
	htim1.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_ENABLE;
	if (HAL_TIM_Base_Init(&htim1) != HAL_OK) {
		Error_Handler();
	}
	sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;
	if (HAL_TIM_ConfigClockSource(&htim1, &sClockSourceConfig) != HAL_OK) {
		Error_Handler();
	}
	if (HAL_TIM_PWM_Init(&htim1) != HAL_OK) {
		Error_Handler();
	}
	sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
	sMasterConfig.MasterOutputTrigger2 = TIM_TRGO2_RESET;
	sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
	if (HAL_TIMEx_MasterConfigSynchronization(&htim1, &sMasterConfig)
			!= HAL_OK) {
		Error_Handler();
	}
	sConfigOC.OCMode = TIM_OCMODE_PWM1;
	sConfigOC.Pulse = 0;
	sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;
	sConfigOC.OCNPolarity = TIM_OCNPOLARITY_HIGH;
	sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;
	sConfigOC.OCIdleState = TIM_OCIDLESTATE_RESET;
	sConfigOC.OCNIdleState = TIM_OCNIDLESTATE_RESET;
	if (HAL_TIM_PWM_ConfigChannel(&htim1, &sConfigOC, TIM_CHANNEL_1)
			!= HAL_OK) {
		Error_Handler();
	}
	if (HAL_TIM_PWM_ConfigChannel(&htim1, &sConfigOC, TIM_CHANNEL_2)
			!= HAL_OK) {
		Error_Handler();
	}
	if (HAL_TIM_PWM_ConfigChannel(&htim1, &sConfigOC, TIM_CHANNEL_3)
			!= HAL_OK) {
		Error_Handler();
	}
	sBreakDeadTimeConfig.OffStateRunMode = TIM_OSSR_DISABLE;
	sBreakDeadTimeConfig.OffStateIDLEMode = TIM_OSSI_DISABLE;
	sBreakDeadTimeConfig.LockLevel = TIM_LOCKLEVEL_OFF;
	sBreakDeadTimeConfig.DeadTime = 0;
	sBreakDeadTimeConfig.BreakState = TIM_BREAK_DISABLE;
	sBreakDeadTimeConfig.BreakPolarity = TIM_BREAKPOLARITY_HIGH;
	sBreakDeadTimeConfig.BreakFilter = 0;
	sBreakDeadTimeConfig.Break2State = TIM_BREAK2_DISABLE;
	sBreakDeadTimeConfig.Break2Polarity = TIM_BREAK2POLARITY_HIGH;
	sBreakDeadTimeConfig.Break2Filter = 0;
	sBreakDeadTimeConfig.AutomaticOutput = TIM_AUTOMATICOUTPUT_DISABLE;
	if (HAL_TIMEx_ConfigBreakDeadTime(&htim1, &sBreakDeadTimeConfig)
			!= HAL_OK) {
		Error_Handler();
	}
	/* USER CODE BEGIN TIM1_Init 2 */

	/* USER CODE END TIM1_Init 2 */
	HAL_TIM_MspPostInit(&htim1);

}

/**
 * @brief USART2 Initialization Function
 * @param None
 * @retval None
 */
static void MX_USART2_UART_Init(void) {

	/* USER CODE BEGIN USART2_Init 0 */

	/* USER CODE END USART2_Init 0 */

	/* USER CODE BEGIN USART2_Init 1 */

	/* USER CODE END USART2_Init 1 */
	huart2.Instance = USART2;
	huart2.Init.BaudRate = 115200;
	huart2.Init.WordLength = UART_WORDLENGTH_8B;
	huart2.Init.StopBits = UART_STOPBITS_1;
	huart2.Init.Parity = UART_PARITY_NONE;
	huart2.Init.Mode = UART_MODE_TX_RX;
	huart2.Init.HwFlowCtl = UART_HWCONTROL_NONE;
	huart2.Init.OverSampling = UART_OVERSAMPLING_16;
	huart2.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
	huart2.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
	if (HAL_UART_Init(&huart2) != HAL_OK) {
		Error_Handler();
	}
	/* USER CODE BEGIN USART2_Init 2 */

	/* USER CODE END USART2_Init 2 */

}

/**
 * @brief GPIO Initialization Function
 * @param None
 * @retval None
 */
static void MX_GPIO_Init(void) {
	GPIO_InitTypeDef GPIO_InitStruct = { 0 };

	/* GPIO Ports Clock Enable */
	__HAL_RCC_GPIOC_CLK_ENABLE();
	__HAL_RCC_GPIOA_CLK_ENABLE();
	__HAL_RCC_GPIOB_CLK_ENABLE();

	/*Configure GPIO pin Output Level */
	HAL_GPIO_WritePin(LD3_GPIO_Port, LD3_Pin, GPIO_PIN_RESET);

	/*Configure GPIO pin : PA1 */
	GPIO_InitStruct.Pin = GPIO_PIN_1;
	GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
	GPIO_InitStruct.Pull = GPIO_NOPULL;
	HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

	/*Configure GPIO pin : LD3_Pin */
	GPIO_InitStruct.Pin = LD3_Pin;
	GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
	GPIO_InitStruct.Pull = GPIO_NOPULL;
	GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
	HAL_GPIO_Init(LD3_GPIO_Port, &GPIO_InitStruct);

}

/* USER CODE BEGIN 4 */

/* USER CODE END 4 */

/**
 * @brief  This function is executed in case of error occurrence.
 * @retval None
 */
void Error_Handler(void) {
	/* USER CODE BEGIN Error_Handler_Debug */
	/* User can add his own implementation to report the HAL error return state */
	__disable_irq();
	while (1) {
	}
	/* USER CODE END Error_Handler_Debug */
}

#ifdef  USE_FULL_ASSERT
/**
  * @brief  Reports the name of the source file and the source line number
  *         where the assert_param error has occurred.
  * @param  file: pointer to the source file name
  * @param  line: assert_param error line source number
  * @retval None
  */
void assert_failed(uint8_t *file, uint32_t line)
{
  /* USER CODE BEGIN 6 */
  /* User can add his own implementation to report the file name and line number,
     ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
  /* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/