ThomasBandin / WvfrmGen_ELEN0448 - Files

main.c
/* USER CODE BEGIN Header */
/**
  ******************************************************************************
  * @file           : main.c
  * @brief          : Main program body
  ******************************************************************************
  * @attention
  *
  * Copyright (c) 2025 STMicroelectronics.
  * All rights reserved.
  *
  * This software is licensed under terms that can be found in the LICENSE file
  * in the root directory of this software component.
  * If no LICENSE file comes with this software, it is provided AS-IS.
  *
  ******************************************************************************
  */
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"

/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include "stdio.h"
#include "math.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 */

/* USER CODE END PM */

/* Private variables ---------------------------------------------------------*/
SPI_HandleTypeDef hspi1;

TIM_HandleTypeDef htim17;

/* USER CODE BEGIN PV */

/* uint16_t twochar = 14336;  la moitié de 3.3 = 258/2, 1110 0000 0000 0000 */
/*uint16_t twocharr = 16368;  3.3 = 255, 0011 1111 1111 0000 */

uint16_t msg_spi[2] = {12288, 16368};
//uint16_t msg_spi2[6] = {12288, 13648, 15008, 16368, 15008, 13648};
uint8_t default_bits[16] = {0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
uint8_t bits[8];
uint8_t signal_form; // Wave form selection
uint8_t n;		// Nbr de pts dans une période A DEFINIR SELON LA FREQ
uint8_t i;		// Le point numéro i
uint16_t new_prescaler;
uint8_t flag_change_signal;
uint8_t flag_freq_increase;
uint8_t flag_freq_decrease;
volatile uint8_t flag_tim17_overflow;

#define PI 3.141592653589793

/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_SPI1_Init(void);
static void MX_TIM17_Init(void);
/* USER CODE BEGIN PFP */

void Signal_square(uint16_t *msg_spi, uint8_t n);
void Signal_triangle(uint8_t *default_bits, uint8_t *bits, uint8_t n, uint8_t i);
void Signal_sine(uint8_t *default_bits, uint8_t *bits, uint8_t n, uint8_t i);
void dec_to_bin(uint8_t value, uint8_t *bits);
void copy_in_vector(uint8_t *bits, uint8_t *default_bits);
uint16_t bin_to_dec(uint8_t *bits);

/* USER CODE END PFP */

/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */

/* USER CODE END 0 */

/**
  * @brief  The application entry point.
  * @retval int
  */
int main(void)
{

  /* USER CODE BEGIN 1 */

  /* 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_SPI1_Init();
  MX_TIM17_Init();
  /* USER CODE BEGIN 2 */

  flag_change_signal = 0;
  flag_freq_increase = 0;
  flag_freq_decrease = 0;
  flag_tim17_overflow = 0;

  signal_form = 0;
  n = 10;		// Nbr de pts dans une période A DEFINIR SELON LA FREQ
  i = 0;		// Le point numéro i

  HAL_TIM_Base_Start_IT(&htim17);

  SPI1->CR1 |= 0x904 ; /* 100 1000 0100 ou 0x904 */
  /* RXONLY = 1 ;SSM=0 ;SSI = 0 ;LSBFIRST=1; SPE=0 ;BR=000 ;MSTR = 1 ;CPOL = 0 ;CPHA = 0 */
  SPI1->CR2 = 3852 ;
  /* après config ioc (NSS Hardware) (voir spi sans interruptions) SPI1 ->CR2 = 0b 1111 0000 1100 */
  /*la ligne «SPI1->CR2 = 3852 ;n’est pas nécessaire si on a configure correctement le port SPI dans config.IOC.
  la ligne «SPI1->CR1 |= 0x904;n’est pas nécessaire si on a configure correctement le port SPI dans config.IOC.
  Voir debugger */
  /* DS= 1111; TXEIE = 0; RXNEIE = 0 ;ERRIE=0 ; FRF = 0; NSSP=1 ;SSOE = 1 ;TXDMAEN = 0; RXDMAEN = 0 */

  /* USER CODE END 2 */

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

while (1)
{
	if (flag_tim17_overflow)
	{
		flag_tim17_overflow = 0;

		if(flag_change_signal)
		{
			flag_change_signal = 0;
			signal_form ++ ;

			if(signal_form > 2)
			{
			  signal_form = 0;
			}
		}

		if (signal_form  == 0)
		{
//			HAL_GPIO_WritePin(GPIOA, GPIO_PIN_5, GPIO_PIN_SET);
//			HAL_GPIO_WritePin(GPIOA, GPIO_PIN_6, GPIO_PIN_RESET);
//			HAL_GPIO_WritePin(GPIOA, GPIO_PIN_7, GPIO_PIN_RESET);
			Signal_square(msg_spi, 2);
		}

		if (signal_form  == 1)
		{
//			HAL_GPIO_WritePin(GPIOA, GPIO_PIN_5, GPIO_PIN_RESET);
//			HAL_GPIO_WritePin(GPIOA, GPIO_PIN_6, GPIO_PIN_SET);
//			HAL_GPIO_WritePin(GPIOA, GPIO_PIN_7, GPIO_PIN_RESET);

			Signal_triangle(default_bits, bits, n, i);
			i++;
			if (n%2)		// si impair
			{
				if(i > n)
				{
					i = 0;
				}
			}
			else			// si pair
			{
				if(i >= n)
				{
					i = 0;
				}
			}
		}

		if (signal_form  == 2)
		{
//			HAL_GPIO_WritePin(GPIOA, GPIO_PIN_5, GPIO_PIN_RESET);
//			HAL_GPIO_WritePin(GPIOA, GPIO_PIN_6, GPIO_PIN_RESET);
//			HAL_GPIO_WritePin(GPIOA, GPIO_PIN_7, GPIO_PIN_SET);

			Signal_sine(default_bits, bits, n, i);
			i++;

			if(i > n)
			{
				i = 0;
			}
		}

		if(flag_freq_decrease)
		{
			flag_freq_decrease = 0;
			HAL_GPIO_WritePin(GPIOA, GPIO_PIN_5, GPIO_PIN_RESET);
			HAL_GPIO_WritePin(GPIOA, GPIO_PIN_6, GPIO_PIN_SET);
			HAL_GPIO_WritePin(GPIOA, GPIO_PIN_7, GPIO_PIN_RESET);

			new_prescaler = (htim17.Init.Prescaler + 1) * 2;
			if(new_prescaler >= 65535)
			{
				new_prescaler = 65535;
			}
			htim17.Init.Prescaler = new_prescaler - 2;
			HAL_TIM_Base_Init(&htim17);
			HAL_TIM_Base_Start_IT(&htim17);
		}

		if(flag_freq_increase)
		{
			flag_freq_increase = 0;
			HAL_GPIO_WritePin(GPIOA, GPIO_PIN_5, GPIO_PIN_SET);
			HAL_GPIO_WritePin(GPIOA, GPIO_PIN_6, GPIO_PIN_RESET);
			HAL_GPIO_WritePin(GPIOA, GPIO_PIN_7, GPIO_PIN_RESET);

			new_prescaler = (htim17.Init.Prescaler + 1) / 2;
			if(new_prescaler <= 2)
			{
				new_prescaler = 2;
			}
			htim17.Init.Prescaler = new_prescaler;
			HAL_TIM_Base_Init(&htim17);
			HAL_TIM_Base_Start_IT(&htim17);
		  }

	}
}

    /* USER CODE END WHILE */

    /* USER CODE BEGIN 3 */

  /* USER CODE END 3 */
}

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

  /** Configure the main internal regulator output voltage
  */
  HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1);

  /** Initializes the RCC Oscillators according to the specified parameters
  * in the RCC_OscInitTypeDef structure.
  */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
  RCC_OscInitStruct.HSIState = RCC_HSI_ON;
  RCC_OscInitStruct.HSIDiv = RCC_HSI_DIV1;
  RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
  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_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK)
  {
    Error_Handler();
  }
}

/**
  * @brief SPI1 Initialization Function
  * @param None
  * @retval None
  */
static void MX_SPI1_Init(void)
{

  /* USER CODE BEGIN SPI1_Init 0 */

  /* USER CODE END SPI1_Init 0 */

  /* USER CODE BEGIN SPI1_Init 1 */

  /* USER CODE END SPI1_Init 1 */
  /* SPI1 parameter configuration*/
  hspi1.Instance = SPI1;
  hspi1.Init.Mode = SPI_MODE_MASTER;
  hspi1.Init.Direction = SPI_DIRECTION_2LINES;
  hspi1.Init.DataSize = SPI_DATASIZE_16BIT;
  hspi1.Init.CLKPolarity = SPI_POLARITY_HIGH;
  hspi1.Init.CLKPhase = SPI_PHASE_2EDGE;
  hspi1.Init.NSS = SPI_NSS_HARD_OUTPUT;
  hspi1.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_2;
  hspi1.Init.FirstBit = SPI_FIRSTBIT_MSB;
  hspi1.Init.TIMode = SPI_TIMODE_DISABLE;
  hspi1.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE;
  hspi1.Init.CRCPolynomial = 7;
  hspi1.Init.CRCLength = SPI_CRC_LENGTH_DATASIZE;
  hspi1.Init.NSSPMode = SPI_NSS_PULSE_DISABLE;
  if (HAL_SPI_Init(&hspi1) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN SPI1_Init 2 */

  /* USER CODE END SPI1_Init 2 */

}

/**
  * @brief TIM17 Initialization Function
  * @param None
  * @retval None
  */
static void MX_TIM17_Init(void)
{

  /* USER CODE BEGIN TIM17_Init 0 */

  /* USER CODE END TIM17_Init 0 */

  /* USER CODE BEGIN TIM17_Init 1 */

  /* USER CODE END TIM17_Init 1 */
  htim17.Instance = TIM17;
  htim17.Init.Prescaler = 32000;
  htim17.Init.CounterMode = TIM_COUNTERMODE_UP;
  htim17.Init.Period = 500;
  htim17.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
  htim17.Init.RepetitionCounter = 0;
  htim17.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;
  if (HAL_TIM_Base_Init(&htim17) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN TIM17_Init 2 */

  /* USER CODE END TIM17_Init 2 */

}

/**
  * @brief GPIO Initialization Function
  * @param None
  * @retval None
  */
static void MX_GPIO_Init(void)
{
  GPIO_InitTypeDef GPIO_InitStruct = {0};
  /* USER CODE BEGIN MX_GPIO_Init_1 */

  /* USER CODE END MX_GPIO_Init_1 */

  /* 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(GPIOA, GPIO_PIN_5|GPIO_PIN_6|GPIO_PIN_7, GPIO_PIN_RESET);

  /*Configure GPIO pins : PA5 PA6 PA7 */
  GPIO_InitStruct.Pin = GPIO_PIN_5|GPIO_PIN_6|GPIO_PIN_7;
  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

  /*Configure GPIO pin : PB2 */
  GPIO_InitStruct.Pin = GPIO_PIN_2;
  GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

  /*Configure GPIO pins : PA8 PA9 PA10 */
  GPIO_InitStruct.Pin = GPIO_PIN_8|GPIO_PIN_9|GPIO_PIN_10;
  GPIO_InitStruct.Mode = GPIO_MODE_IT_FALLING;
  GPIO_InitStruct.Pull = GPIO_PULLUP;
  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

  /* EXTI interrupt init*/
  HAL_NVIC_SetPriority(EXTI4_15_IRQn, 0, 0);
  HAL_NVIC_EnableIRQ(EXTI4_15_IRQn);

  /* USER CODE BEGIN MX_GPIO_Init_2 */

  /* USER CODE END MX_GPIO_Init_2 */
}

/* USER CODE BEGIN 4 */

void Signal_square(uint16_t *msg_spi, uint8_t n)
{
    static uint8_t i = 0;

    while (!(SPI1->SR & 2)) {}

    SPI1->CR1 |= 0x0040;

    SPI1->DR = msg_spi[i];

    i = (i + 1) % n;

    while (SPI1->SR & 0x80) {}

    // Désactive SPI (SPE = 0) -> fait remonter NSS
    SPI1->CR1 &= ~0x0040;

    // Petit délai entre transmissions
    HAL_Delay(10);  // tu peux ajuster (en ms)
}

void Signal_triangle(uint8_t *default_bits, uint8_t *bits, uint8_t n, uint8_t i)
{

    uint8_t value = 0;
	uint8_t mid = 0;

	if (n%2)
	{
		mid = (n+1)/2;
	}
	else
	{
		mid = n/2;
	}

    while (!(SPI1->SR & 2)) {}

    	SPI1->CR1 |= 0x0040;

		if(i<= mid)
			value = 255*i/mid;

		else if(i > mid)
		{
			value = 255*(2*mid - i)/mid;
		}

		dec_to_bin(value, bits);
		copy_in_vector(bits, default_bits);

		SPI1->DR = bin_to_dec(default_bits);

    while (SPI1->SR & 0x80) {}

		SPI1->CR1 &= ~0x0040;

		HAL_Delay(10);
}

void Signal_sine(uint8_t *default_bits, uint8_t *bits, uint8_t n, uint8_t i)
{

    uint8_t value = 0;
    float angle = 0;

    while (!(SPI1->SR & 2)) {}

    	SPI1->CR1 |= 0x0040;

    	angle = (2*PI*i) / (float) n;

    	value = (255/2) * (sin(angle) + 1);

		dec_to_bin(value, bits);
		copy_in_vector(bits, default_bits);

		SPI1->DR = bin_to_dec(default_bits);

    while (SPI1->SR & 0x80) {}

		SPI1->CR1 &= ~0x0040;

		HAL_Delay(10);
}

void dec_to_bin(uint8_t value, uint8_t *bits)
{
    for (int i = 7; i >= 0; i--)
    {
        bits[7 - i] = (value & (1 << i)) ? 1 : 0;
    }
}
void copy_in_vector(uint8_t *bits, uint8_t *default_bits)
{
	for (int i = 0; i <= 7; i++)
	{
		default_bits[4 + i] = bits[i];
	}
}
uint16_t bin_to_dec(uint8_t *bits)
{
    uint16_t value = 0;
    for (int i = 0; i < 16; i++)
    {
        value |= (bits[i] & 0x01) << (15 - i);
    }
    return value;
}



void HAL_GPIO_EXTI_Falling_Callback(uint16_t GPIO_Pin)
{
	if(GPIO_Pin == GPIO_PIN_8)
	{
		flag_change_signal = 1;
	}

	if(GPIO_Pin == GPIO_PIN_9)
	{
		flag_freq_decrease = 1;
	}

	if(GPIO_Pin == GPIO_PIN_10)
	{
		flag_freq_increase = 1;
	}
}


void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
{
    if (htim->Instance == TIM17)
    {
        flag_tim17_overflow = 1;
    }
}

/* 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 */