Enable I2C on STM32

systems/obc/CM7/Core/Inc/stm32h7xx_it.h

@@ -53,6 +53,8 @@ void BusFault_Handler(void);
 void UsageFault_Handler(void);
 void DebugMon_Handler(void);
 void SysTick_Handler(void);
+void I2C1_EV_IRQHandler(void);
+void I2C1_ER_IRQHandler(void);
 /* USER CODE BEGIN EFP */
 
 /* USER CODE END EFP */

systems/obc/CM7/Core/Src/main.c

@@ -19,7 +19,7 @@
 /* Includes ------------------------------------------------------------------*/
 #include "main.h"
 #include "string.h"
-#include "cmsis_os2.h"
+#include "cmsis_os.h"
 
 /* Private includes ----------------------------------------------------------*/
 /* USER CODE BEGIN Includes */
@@ -67,6 +67,8 @@ ETH_TxPacketConfig TxConfig;
 
 ETH_HandleTypeDef heth;
 
+I2C_HandleTypeDef hi2c1;
+
 UART_HandleTypeDef huart3;
 
 PCD_HandleTypeDef hpcd_USB_OTG_FS;
@@ -88,6 +90,7 @@ static void MX_GPIO_Init(void);
 static void MX_ETH_Init(void);
 static void MX_USART3_UART_Init(void);
 static void MX_USB_OTG_FS_PCD_Init(void);
+static void MX_I2C1_Init(void);
 void StartDefaultTask(void *argument);
 
 /* USER CODE BEGIN PFP */
@@ -159,6 +162,7 @@ HSEM notification */
   MX_ETH_Init();
   MX_USART3_UART_Init();
   MX_USB_OTG_FS_PCD_Init();
+  MX_I2C1_Init();
   /* USER CODE BEGIN 2 */
 
   /* USER CODE END 2 */
@@ -318,6 +322,54 @@ static void MX_ETH_Init(void)
 
 }
 
+/**
+  * @brief I2C1 Initialization Function
+  * @param None
+  * @retval None
+  */
+static void MX_I2C1_Init(void)
+{
+
+  /* USER CODE BEGIN I2C1_Init 0 */
+
+  /* USER CODE END I2C1_Init 0 */
+
+  /* USER CODE BEGIN I2C1_Init 1 */
+
+  /* USER CODE END I2C1_Init 1 */
+  hi2c1.Instance = I2C1;
+  hi2c1.Init.Timing = 0x10707DBC;
+  hi2c1.Init.OwnAddress1 = 0;
+  hi2c1.Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT;
+  hi2c1.Init.DualAddressMode = I2C_DUALADDRESS_DISABLE;
+  hi2c1.Init.OwnAddress2 = 0;
+  hi2c1.Init.OwnAddress2Masks = I2C_OA2_NOMASK;
+  hi2c1.Init.GeneralCallMode = I2C_GENERALCALL_DISABLE;
+  hi2c1.Init.NoStretchMode = I2C_NOSTRETCH_DISABLE;
+  if (HAL_I2C_Init(&hi2c1) != HAL_OK)
+  {
+    Error_Handler();
+  }
+
+  /** Configure Analogue filter
+  */
+  if (HAL_I2CEx_ConfigAnalogFilter(&hi2c1, I2C_ANALOGFILTER_ENABLE) != HAL_OK)
+  {
+    Error_Handler();
+  }
+
+  /** Configure Digital filter
+  */
+  if (HAL_I2CEx_ConfigDigitalFilter(&hi2c1, 0) != HAL_OK)
+  {
+    Error_Handler();
+  }
+  /* USER CODE BEGIN I2C1_Init 2 */
+
+  /* USER CODE END I2C1_Init 2 */
+
+}
+
 /**
   * @brief USART3 Initialization Function
   * @param None

systems/obc/CM7/Core/Src/stm32h7xx_hal_msp.c

@@ -191,6 +191,91 @@ void HAL_ETH_MspDeInit(ETH_HandleTypeDef* heth)
 
 }
 
+/**
+* @brief I2C MSP Initialization
+* This function configures the hardware resources used in this example
+* @param hi2c: I2C handle pointer
+* @retval None
+*/
+void HAL_I2C_MspInit(I2C_HandleTypeDef* hi2c)
+{
+  GPIO_InitTypeDef GPIO_InitStruct = {0};
+  RCC_PeriphCLKInitTypeDef PeriphClkInitStruct = {0};
+  if(hi2c->Instance==I2C1)
+  {
+  /* USER CODE BEGIN I2C1_MspInit 0 */
+
+  /* USER CODE END I2C1_MspInit 0 */
+
+  /** Initializes the peripherals clock
+  */
+    PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_I2C1;
+    PeriphClkInitStruct.I2c123ClockSelection = RCC_I2C123CLKSOURCE_D2PCLK1;
+    if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct) != HAL_OK)
+    {
+      Error_Handler();
+    }
+
+    __HAL_RCC_GPIOB_CLK_ENABLE();
+    /**I2C1 GPIO Configuration
+    PB6     ------> I2C1_SCL
+    PB7     ------> I2C1_SDA
+    */
+    GPIO_InitStruct.Pin = GPIO_PIN_6|GPIO_PIN_7;
+    GPIO_InitStruct.Mode = GPIO_MODE_AF_OD;
+    GPIO_InitStruct.Pull = GPIO_PULLUP;
+    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
+    GPIO_InitStruct.Alternate = GPIO_AF4_I2C1;
+    HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
+
+    /* Peripheral clock enable */
+    __HAL_RCC_I2C1_CLK_ENABLE();
+    /* I2C1 interrupt Init */
+    HAL_NVIC_SetPriority(I2C1_EV_IRQn, 5, 0);
+    HAL_NVIC_EnableIRQ(I2C1_EV_IRQn);
+    HAL_NVIC_SetPriority(I2C1_ER_IRQn, 5, 0);
+    HAL_NVIC_EnableIRQ(I2C1_ER_IRQn);
+  /* USER CODE BEGIN I2C1_MspInit 1 */
+
+  /* USER CODE END I2C1_MspInit 1 */
+  }
+
+}
+
+/**
+* @brief I2C MSP De-Initialization
+* This function freeze the hardware resources used in this example
+* @param hi2c: I2C handle pointer
+* @retval None
+*/
+void HAL_I2C_MspDeInit(I2C_HandleTypeDef* hi2c)
+{
+  if(hi2c->Instance==I2C1)
+  {
+  /* USER CODE BEGIN I2C1_MspDeInit 0 */
+
+  /* USER CODE END I2C1_MspDeInit 0 */
+    /* Peripheral clock disable */
+    __HAL_RCC_I2C1_CLK_DISABLE();
+
+    /**I2C1 GPIO Configuration
+    PB6     ------> I2C1_SCL
+    PB7     ------> I2C1_SDA
+    */
+    HAL_GPIO_DeInit(GPIOB, GPIO_PIN_6);
+
+    HAL_GPIO_DeInit(GPIOB, GPIO_PIN_7);
+
+    /* I2C1 interrupt DeInit */
+    HAL_NVIC_DisableIRQ(I2C1_EV_IRQn);
+    HAL_NVIC_DisableIRQ(I2C1_ER_IRQn);
+  /* USER CODE BEGIN I2C1_MspDeInit 1 */
+
+  /* USER CODE END I2C1_MspDeInit 1 */
+  }
+
+}
+
 /**
 * @brief UART MSP Initialization
 * This function configures the hardware resources used in this example

systems/obc/CM7/Core/Src/stm32h7xx_it.c

@@ -57,7 +57,7 @@
 /* USER CODE END 0 */
 
 /* External variables --------------------------------------------------------*/
-
+extern I2C_HandleTypeDef hi2c1;
 /* USER CODE BEGIN EV */
 
 /* USER CODE END EV */
@@ -182,6 +182,34 @@ void SysTick_Handler(void)
 /* please refer to the startup file (startup_stm32h7xx.s).                    */
 /******************************************************************************/
 
+/**
+  * @brief This function handles I2C1 event interrupt.
+  */
+void I2C1_EV_IRQHandler(void)
+{
+  /* USER CODE BEGIN I2C1_EV_IRQn 0 */
+
+  /* USER CODE END I2C1_EV_IRQn 0 */
+  HAL_I2C_EV_IRQHandler(&hi2c1);
+  /* USER CODE BEGIN I2C1_EV_IRQn 1 */
+
+  /* USER CODE END I2C1_EV_IRQn 1 */
+}
+
+/**
+  * @brief This function handles I2C1 error interrupt.
+  */
+void I2C1_ER_IRQHandler(void)
+{
+  /* USER CODE BEGIN I2C1_ER_IRQn 0 */
+
+  /* USER CODE END I2C1_ER_IRQn 0 */
+  HAL_I2C_ER_IRQHandler(&hi2c1);
+  /* USER CODE BEGIN I2C1_ER_IRQn 1 */
+
+  /* USER CODE END I2C1_ER_IRQn 1 */
+}
+
 /* USER CODE BEGIN 1 */
 
 /* USER CODE END 1 */

systems/obc/CMakeLists.txt

@@ -41,6 +41,7 @@ if (BALLOON_CROSS_COMPILING)
         HAL::STM32::H7::M7::FLASH
         HAL::STM32::H7::M7::HSEM
         HAL::STM32::H7::M7::I2C
+        HAL::STM32::H7::M7::I2CEx
         HAL::STM32::H7::M7::PWREx
         HAL::STM32::H7::M7::UARTEx
         HAL::STM32::H7::M7::PCDEx