text: /* USER CODE BEGIN Header */
  /**
    ******************************************************************************
    * @file           : main.c
    * @brief          : Main program body
    ******************************************************************************
    * @attention
    *
    * <h2><center>&copy; Copyright (c) 2021 STMicroelectronics.
    * All rights reserved.</center></h2>
    *
    * This software component is licensed by ST under BSD 3-Clause license,
    * the "License"; You may not use this file except in compliance with the
    * License. You may obtain a copy of the License at:
    *                        opensource.org/licenses/BSD-3-Clause
    *
    ******************************************************************************
    */
  /* USER CODE END Header */
  /* Includes ------------------------------------------------------------------*/
  #include "main.h"
  
  /* Private includes ----------------------------------------------------------*/
  /* USER CODE BEGIN Includes */
  #include "mcp3564.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;
  DMA_HandleTypeDef hdma_spi1_rx;
  
  TIM_HandleTypeDef htim17;
  
  UART_HandleTypeDef huart2;
  
  /* USER CODE BEGIN PV */
  volatile uint32_t adc_val;
  volatile bool setup_done;
  /* 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_DMA_Init(void);
  static void MX_SPI1_Init(void);
  static void MX_TIM17_Init(void);
  /* USER CODE BEGIN PFP */
  
  /* 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 */
  	setup_done = false;
    /* 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_DMA_Init();
    MX_SPI1_Init();
    MX_TIM17_Init();
    /* USER CODE BEGIN 2 */
    printf("boink\n");
    HAL_TIM_Base_Start(&htim17);
    HAL_TIM_OC_Start(&htim17, TIM_CHANNEL_1);
    HAL_Delay(10);
  
    MCP3561_Reset(&hspi1);
    HAL_Delay(10);
    MCP3561_PrintRegisters(&hspi1);
    printf("\n");
  
    MCP3561_Init(&hspi1);
    printf("\n");
    HAL_Delay(10);
    MCP3561_PrintRegisters(&hspi1);
    printf("\n");
  
    setup_done = true;
    /* USER CODE END 2 */
  
    /* Infinite loop */
    /* USER CODE BEGIN WHILE */
    while (1)
    {
      /* USER CODE END WHILE */
  
      /* USER CODE BEGIN 3 */
  	  //MCP3561_PrintRegisters();
  	  //printf("\n");
  	  HAL_Delay(100);
  	  printf("%d\n", (int)adc_val);  // updated in ISR
    }
    /* USER CODE END 3 */
  }
  
  /**
    * @brief System Clock Configuration
    * @retval None
    */
  void SystemClock_Config(void)
  {
    RCC_OscInitTypeDef RCC_OscInitStruct = {0};
    RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
    RCC_PeriphCLKInitTypeDef PeriphClkInit = {0};
  
    /** 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.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
    RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
    RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
    RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL8;
    RCC_OscInitStruct.PLL.PREDIV = RCC_PREDIV_DIV1;
    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_DIV2;
    RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
  
    if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
    {
      Error_Handler();
    }
    PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USART2|RCC_PERIPHCLK_TIM17;
    PeriphClkInit.Usart2ClockSelection = RCC_USART2CLKSOURCE_PCLK1;
    PeriphClkInit.Tim17ClockSelection = RCC_TIM17CLK_PLLCLK;
    if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != 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_8BIT;
    hspi1.Init.CLKPolarity = SPI_POLARITY_LOW;
    hspi1.Init.CLKPhase = SPI_PHASE_1EDGE;
    hspi1.Init.NSS = SPI_NSS_HARD_OUTPUT;
    hspi1.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_32;
    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 */
  
    TIM_OC_InitTypeDef sConfigOC = {0};
    TIM_BreakDeadTimeConfigTypeDef sBreakDeadTimeConfig = {0};
  
    /* USER CODE BEGIN TIM17_Init 1 */
  
    /* USER CODE END TIM17_Init 1 */
    htim17.Instance = TIM17;
    htim17.Init.Prescaler = 0;
    htim17.Init.CounterMode = TIM_COUNTERMODE_UP;
    htim17.Init.Period = 13-1;
    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();
    }
    if (HAL_TIM_OC_Init(&htim17) != HAL_OK)
    {
      Error_Handler();
    }
    sConfigOC.OCMode = TIM_OCMODE_TOGGLE;
    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_OC_ConfigChannel(&htim17, &sConfigOC, TIM_CHANNEL_1) != 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.AutomaticOutput = TIM_AUTOMATICOUTPUT_DISABLE;
    if (HAL_TIMEx_ConfigBreakDeadTime(&htim17, &sBreakDeadTimeConfig) != HAL_OK)
    {
      Error_Handler();
    }
    /* USER CODE BEGIN TIM17_Init 2 */
  
    /* USER CODE END TIM17_Init 2 */
    HAL_TIM_MspPostInit(&htim17);
  
  }
  
  /**
    * @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 */
  
  }
  
  /**
    * Enable DMA controller clock
    */
  static void MX_DMA_Init(void)
  {
  
    /* DMA controller clock enable */
    __HAL_RCC_DMA1_CLK_ENABLE();
  
    /* DMA interrupt init */
    /* DMA1_Channel2_IRQn interrupt configuration */
    HAL_NVIC_SetPriority(DMA1_Channel2_IRQn, 0, 0);
    HAL_NVIC_EnableIRQ(DMA1_Channel2_IRQn);
  
  }
  
  /**
    * @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_GPIOF_CLK_ENABLE();
    __HAL_RCC_GPIOA_CLK_ENABLE();
    __HAL_RCC_GPIOB_CLK_ENABLE();
  
    /*Configure GPIO pin Output Level */
    HAL_GPIO_WritePin(SPI1_CS_GPIO_Port, SPI1_CS_Pin, GPIO_PIN_SET);
  
    /*Configure GPIO pin : B1_Pin */
    GPIO_InitStruct.Pin = B1_Pin;
    GPIO_InitStruct.Mode = GPIO_MODE_IT_FALLING;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    HAL_GPIO_Init(B1_GPIO_Port, &GPIO_InitStruct);
  
    /*Configure GPIO pin : SPI1_CS_Pin */
    GPIO_InitStruct.Pin = SPI1_CS_Pin;
    GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
    HAL_GPIO_Init(SPI1_CS_GPIO_Port, &GPIO_InitStruct);
  
    /*Configure GPIO pin : MCP3564_IRQ_Pin */
    GPIO_InitStruct.Pin = MCP3564_IRQ_Pin;
    GPIO_InitStruct.Mode = GPIO_MODE_IT_RISING;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    HAL_GPIO_Init(MCP3564_IRQ_GPIO_Port, &GPIO_InitStruct);
  
    /* EXTI interrupt init*/
    HAL_NVIC_SetPriority(EXTI9_5_IRQn, 0, 0);
    HAL_NVIC_EnableIRQ(EXTI9_5_IRQn);
  
  }
  
  /* USER CODE BEGIN 4 */
  /**
   * @brief  Retargets the C library printf function to the USART.
   * @param  None
   * @retval None
   */
  PUTCHAR_PROTOTYPE {
      /* Place your implementation of fputc here */
      /* e.g. write a character to the EVAL_COM1 and Loop until the end of transmission */
      HAL_UART_Transmit(&huart2, (uint8_t *) &ch, 1, 0xFFFF);
  
      return ch;
  }
  
  /**
  * @brief Interrupt callback for GPIOs
  */
  void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin)
  {
      if ( GPIO_Pin == GPIO_PIN_6) {
      	if(setup_done){
      		uint8_t val[5] = {0,0,0,0,0};
      		uint8_t cmd[5] = {0,0,0,0,0};
      		cmd[0] = MCP3561_SREAD_DATA_COMMAND;
      		HAL_GPIO_WritePin(SPI1_CS_GPIO_Port, SPI1_CS_Pin, 0);
      		// non-blocking "HAL_SPI_TransmitReceive_IT" does not work
      		// because we need to create CS signal manually
      		// the timout therefore must not be greater than 1/fs
      		// e.g. at 300 Hz --> 3ms
      		HAL_SPI_TransmitReceive(&hspi1, &cmd[0], &val[0], 5, 1);
      		HAL_GPIO_WritePin(SPI1_CS_GPIO_Port, SPI1_CS_Pin, 1);
      		adc_val = (val[1] << 16) | (val[2] << 8) | val[3];
      	}
      }
  }
  /* 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****/
  