nguyen nam
Nam
Diff: Drivers/BSP/STM32746G-Discovery/stm32746g_discovery.c
- Revision:
- 6:e1d9da7fe856
- Child:
- 8:56384bddaba5
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/Drivers/BSP/STM32746G-Discovery/stm32746g_discovery.c Thu Nov 10 09:57:11 2016 +0100
@@ -0,0 +1,902 @@
+/**
+ ******************************************************************************
+ * @file stm32746g_discovery.c
+ * @author MCD Application Team
+ * @version V1.1.1
+ * @date 02-June-2016
+ * @brief This file provides a set of firmware functions to manage LEDs,
+ * push-buttons and COM ports available on STM32746G-Discovery
+ * board(MB1191) from STMicroelectronics.
+ ******************************************************************************
+ * @attention
+ *
+ * <h2><center>© COPYRIGHT(c) 2016 STMicroelectronics</center></h2>
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * 3. Neither the name of STMicroelectronics nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ ******************************************************************************
+ */
+
+/* Includes ------------------------------------------------------------------*/
+#include "stm32746g_discovery.h"
+
+void wait_ms(int ms); // MBED to replace HAL_Delay function
+
+/** @addtogroup BSP
+ * @{
+ */
+
+/** @addtogroup STM32746G_DISCOVERY
+ * @{
+ */
+
+/** @defgroup STM32746G_DISCOVERY_LOW_LEVEL STM32746G_DISCOVERY_LOW_LEVEL
+ * @{
+ */
+
+/** @defgroup STM32746G_DISCOVERY_LOW_LEVEL_Private_TypesDefinitions STM32746G_DISCOVERY_LOW_LEVEL Private Types Definitions
+ * @{
+ */
+/**
+ * @}
+ */
+
+/** @defgroup STM32746G_DISCOVERY_LOW_LEVEL_Private_Defines STM32746G_DISCOVERY_LOW_LEVEL Private Defines
+ * @{
+ */
+/**
+ * @brief STM32746G DISCOVERY BSP Driver version number V1.1.1
+ */
+#define __STM32746G_DISCO_BSP_VERSION_MAIN (0x01) /*!< [31:24] main version */
+#define __STM32746G_DISCO_BSP_VERSION_SUB1 (0x01) /*!< [23:16] sub1 version */
+#define __STM32746G_DISCO_BSP_VERSION_SUB2 (0x01) /*!< [15:8] sub2 version */
+#define __STM32746G_DISCO_BSP_VERSION_RC (0x00) /*!< [7:0] release candidate */
+#define __STM32746G_DISCO_BSP_VERSION ((__STM32746G_DISCO_BSP_VERSION_MAIN << 24)\
+ |(__STM32746G_DISCO_BSP_VERSION_SUB1 << 16)\
+ |(__STM32746G_DISCO_BSP_VERSION_SUB2 << 8 )\
+ |(__STM32746G_DISCO_BSP_VERSION_RC))
+/**
+ * @}
+ */
+
+/** @defgroup STM32746G_DISCOVERY_LOW_LEVEL_Private_Macros STM32746G_DISCOVERY_LOW_LEVEL Private Macros
+ * @{
+ */
+/**
+ * @}
+ */
+
+/** @defgroup STM32746G_DISCOVERY_LOW_LEVEL_Private_Variables STM32746G_DISCOVERY_LOW_LEVEL Private Variables
+ * @{
+ */
+
+const uint32_t GPIO_PIN[LEDn] = {LED1_PIN};
+
+GPIO_TypeDef* BUTTON_PORT[BUTTONn] = {WAKEUP_BUTTON_GPIO_PORT,
+ TAMPER_BUTTON_GPIO_PORT,
+ KEY_BUTTON_GPIO_PORT};
+
+const uint16_t BUTTON_PIN[BUTTONn] = {WAKEUP_BUTTON_PIN,
+ TAMPER_BUTTON_PIN,
+ KEY_BUTTON_PIN};
+
+const uint16_t BUTTON_IRQn[BUTTONn] = {WAKEUP_BUTTON_EXTI_IRQn,
+ TAMPER_BUTTON_EXTI_IRQn,
+ KEY_BUTTON_EXTI_IRQn};
+
+USART_TypeDef* COM_USART[COMn] = {DISCOVERY_COM1};
+
+GPIO_TypeDef* COM_TX_PORT[COMn] = {DISCOVERY_COM1_TX_GPIO_PORT};
+
+GPIO_TypeDef* COM_RX_PORT[COMn] = {DISCOVERY_COM1_RX_GPIO_PORT};
+
+const uint16_t COM_TX_PIN[COMn] = {DISCOVERY_COM1_TX_PIN};
+
+const uint16_t COM_RX_PIN[COMn] = {DISCOVERY_COM1_RX_PIN};
+
+const uint16_t COM_TX_AF[COMn] = {DISCOVERY_COM1_TX_AF};
+
+const uint16_t COM_RX_AF[COMn] = {DISCOVERY_COM1_RX_AF};
+
+static I2C_HandleTypeDef hI2cAudioHandler = {0};
+static I2C_HandleTypeDef hI2cExtHandler = {0};
+
+/**
+ * @}
+ */
+
+/** @defgroup STM32746G_DISCOVERY_LOW_LEVEL_Private_FunctionPrototypes STM32746G_DISCOVERY_LOW_LEVEL Private Function Prototypes
+ * @{
+ */
+static void I2Cx_MspInit(I2C_HandleTypeDef *i2c_handler);
+static void I2Cx_Init(I2C_HandleTypeDef *i2c_handler);
+
+static HAL_StatusTypeDef I2Cx_ReadMultiple(I2C_HandleTypeDef *i2c_handler, uint8_t Addr, uint16_t Reg, uint16_t MemAddSize, uint8_t *Buffer, uint16_t Length);
+static HAL_StatusTypeDef I2Cx_WriteMultiple(I2C_HandleTypeDef *i2c_handler, uint8_t Addr, uint16_t Reg, uint16_t MemAddSize, uint8_t *Buffer, uint16_t Length);
+static HAL_StatusTypeDef I2Cx_IsDeviceReady(I2C_HandleTypeDef *i2c_handler, uint16_t DevAddress, uint32_t Trials);
+static void I2Cx_Error(I2C_HandleTypeDef *i2c_handler, uint8_t Addr);
+
+/* AUDIO IO functions */
+void AUDIO_IO_Init(void);
+void AUDIO_IO_DeInit(void);
+void AUDIO_IO_Write(uint8_t Addr, uint16_t Reg, uint16_t Value);
+uint16_t AUDIO_IO_Read(uint8_t Addr, uint16_t Reg);
+void AUDIO_IO_Delay(uint32_t Delay);
+
+/* TOUCHSCREEN IO functions */
+void TS_IO_Init(void);
+void TS_IO_Write(uint8_t Addr, uint8_t Reg, uint8_t Value);
+uint8_t TS_IO_Read(uint8_t Addr, uint8_t Reg);
+void TS_IO_Delay(uint32_t Delay);
+
+/* CAMERA IO functions */
+void CAMERA_IO_Init(void);
+void CAMERA_Delay(uint32_t Delay);
+void CAMERA_IO_Write(uint8_t Addr, uint8_t Reg, uint8_t Value);
+uint8_t CAMERA_IO_Read(uint8_t Addr, uint8_t Reg);
+
+/* I2C EEPROM IO function */
+void EEPROM_IO_Init(void);
+HAL_StatusTypeDef EEPROM_IO_WriteData(uint16_t DevAddress, uint16_t MemAddress, uint8_t* pBuffer, uint32_t BufferSize);
+HAL_StatusTypeDef EEPROM_IO_ReadData(uint16_t DevAddress, uint16_t MemAddress, uint8_t* pBuffer, uint32_t BufferSize);
+HAL_StatusTypeDef EEPROM_IO_IsDeviceReady(uint16_t DevAddress, uint32_t Trials);
+/**
+ * @}
+ */
+
+/** @defgroup STM32746G_DISCOVERY_LOW_LEVEL_Exported_Functions STM32746G_DISCOVERY_LOW_LEVELSTM32746G_DISCOVERY_LOW_LEVEL Exported Functions
+ * @{
+ */
+
+ /**
+ * @brief This method returns the STM32746G DISCOVERY BSP Driver revision
+ * @retval version: 0xXYZR (8bits for each decimal, R for RC)
+ */
+uint32_t BSP_GetVersion(void)
+{
+ return __STM32746G_DISCO_BSP_VERSION;
+}
+
+/**
+ * @brief Configures LED on GPIO.
+ * @param Led: LED to be configured.
+ * This parameter can be one of the following values:
+ * @arg LED1
+ * @retval None
+ */
+void BSP_LED_Init(Led_TypeDef Led)
+{
+ GPIO_InitTypeDef gpio_init_structure;
+ GPIO_TypeDef* gpio_led;
+
+ if (Led == DISCO_LED1) // MBED
+ {
+ gpio_led = LED1_GPIO_PORT;
+ /* Enable the GPIO_LED clock */
+ LED1_GPIO_CLK_ENABLE();
+
+ /* Configure the GPIO_LED pin */
+ gpio_init_structure.Pin = GPIO_PIN[Led];
+ gpio_init_structure.Mode = GPIO_MODE_OUTPUT_PP;
+ gpio_init_structure.Pull = GPIO_PULLUP;
+ gpio_init_structure.Speed = GPIO_SPEED_HIGH;
+
+ HAL_GPIO_Init(gpio_led, &gpio_init_structure);
+
+ /* By default, turn off LED */
+ HAL_GPIO_WritePin(gpio_led, GPIO_PIN[Led], GPIO_PIN_RESET);
+ }
+}
+
+/**
+ * @brief DeInit LEDs.
+ * @param Led: LED to be configured.
+ * This parameter can be one of the following values:
+ * @arg LED1
+ * @note Led DeInit does not disable the GPIO clock
+ * @retval None
+ */
+void BSP_LED_DeInit(Led_TypeDef Led)
+{
+ GPIO_InitTypeDef gpio_init_structure;
+ GPIO_TypeDef* gpio_led;
+
+ if (Led == DISCO_LED1) // MBED
+ {
+ gpio_led = LED1_GPIO_PORT;
+ /* Turn off LED */
+ HAL_GPIO_WritePin(gpio_led, GPIO_PIN[Led], GPIO_PIN_RESET);
+ /* Configure the GPIO_LED pin */
+ gpio_init_structure.Pin = GPIO_PIN[Led];
+ HAL_GPIO_DeInit(gpio_led, gpio_init_structure.Pin);
+ }
+}
+
+/**
+ * @brief Turns selected LED On.
+ * @param Led: LED to be set on
+ * This parameter can be one of the following values:
+ * @arg LED1
+ * @retval None
+ */
+void BSP_LED_On(Led_TypeDef Led)
+{
+ GPIO_TypeDef* gpio_led;
+
+ if (Led == DISCO_LED1) /* Switch On LED connected to GPIO */ // MBED
+ {
+ gpio_led = LED1_GPIO_PORT;
+ HAL_GPIO_WritePin(gpio_led, GPIO_PIN[Led], GPIO_PIN_SET);
+ }
+}
+
+/**
+ * @brief Turns selected LED Off.
+ * @param Led: LED to be set off
+ * This parameter can be one of the following values:
+ * @arg LED1
+ * @retval None
+ */
+void BSP_LED_Off(Led_TypeDef Led)
+{
+ GPIO_TypeDef* gpio_led;
+
+ if (Led == DISCO_LED1) /* Switch Off LED connected to GPIO */ // MBED
+ {
+ gpio_led = LED1_GPIO_PORT;
+ HAL_GPIO_WritePin(gpio_led, GPIO_PIN[Led], GPIO_PIN_RESET);
+ }
+}
+
+/**
+ * @brief Toggles the selected LED.
+ * @param Led: LED to be toggled
+ * This parameter can be one of the following values:
+ * @arg LED1
+ * @retval None
+ */
+void BSP_LED_Toggle(Led_TypeDef Led)
+{
+ GPIO_TypeDef* gpio_led;
+
+ if (Led == DISCO_LED1) /* Toggle LED connected to GPIO */ // MBED
+ {
+ gpio_led = LED1_GPIO_PORT;
+ HAL_GPIO_TogglePin(gpio_led, GPIO_PIN[Led]);
+ }
+}
+
+/**
+ * @brief Configures button GPIO and EXTI Line.
+ * @param Button: Button to be configured
+ * This parameter can be one of the following values:
+ * @arg BUTTON_WAKEUP: Wakeup Push Button
+ * @arg BUTTON_TAMPER: Tamper Push Button
+ * @arg BUTTON_KEY: Key Push Button
+ * @param ButtonMode: Button mode
+ * This parameter can be one of the following values:
+ * @arg BUTTON_MODE_GPIO: Button will be used as simple IO
+ * @arg BUTTON_MODE_EXTI: Button will be connected to EXTI line
+ * with interrupt generation capability
+ * @note On STM32746G-Discovery board, the three buttons (Wakeup, Tamper and key buttons)
+ * are mapped on the same push button named "User"
+ * on the board serigraphy.
+ * @retval None
+ */
+void BSP_PB_Init(Button_TypeDef Button, ButtonMode_TypeDef ButtonMode)
+{
+ GPIO_InitTypeDef gpio_init_structure;
+
+ /* Enable the BUTTON clock */
+ BUTTONx_GPIO_CLK_ENABLE(Button);
+
+ if(ButtonMode == BUTTON_MODE_GPIO)
+ {
+ /* Configure Button pin as input */
+ gpio_init_structure.Pin = BUTTON_PIN[Button];
+ gpio_init_structure.Mode = GPIO_MODE_INPUT;
+ gpio_init_structure.Pull = GPIO_NOPULL;
+ gpio_init_structure.Speed = GPIO_SPEED_FAST;
+ HAL_GPIO_Init(BUTTON_PORT[Button], &gpio_init_structure);
+ }
+
+ if(ButtonMode == BUTTON_MODE_EXTI)
+ {
+ /* Configure Button pin as input with External interrupt */
+ gpio_init_structure.Pin = BUTTON_PIN[Button];
+ gpio_init_structure.Pull = GPIO_NOPULL;
+ gpio_init_structure.Speed = GPIO_SPEED_FAST;
+
+ if(Button != BUTTON_WAKEUP)
+ {
+ gpio_init_structure.Mode = GPIO_MODE_IT_FALLING;
+ }
+ else
+ {
+ gpio_init_structure.Mode = GPIO_MODE_IT_RISING;
+ }
+
+ HAL_GPIO_Init(BUTTON_PORT[Button], &gpio_init_structure);
+
+ /* Enable and set Button EXTI Interrupt to the lowest priority */
+ HAL_NVIC_SetPriority((IRQn_Type)(BUTTON_IRQn[Button]), 0x0F, 0x00);
+ HAL_NVIC_EnableIRQ((IRQn_Type)(BUTTON_IRQn[Button]));
+ }
+}
+
+/**
+ * @brief Push Button DeInit.
+ * @param Button: Button to be configured
+ * This parameter can be one of the following values:
+ * @arg BUTTON_WAKEUP: Wakeup Push Button
+ * @arg BUTTON_TAMPER: Tamper Push Button
+ * @arg BUTTON_KEY: Key Push Button
+ * @note On STM32746G-Discovery board, the three buttons (Wakeup, Tamper and key buttons)
+ * are mapped on the same push button named "User"
+ * on the board serigraphy.
+ * @note PB DeInit does not disable the GPIO clock
+ * @retval None
+ */
+void BSP_PB_DeInit(Button_TypeDef Button)
+{
+ GPIO_InitTypeDef gpio_init_structure;
+
+ gpio_init_structure.Pin = BUTTON_PIN[Button];
+ HAL_NVIC_DisableIRQ((IRQn_Type)(BUTTON_IRQn[Button]));
+ HAL_GPIO_DeInit(BUTTON_PORT[Button], gpio_init_structure.Pin);
+}
+
+
+/**
+ * @brief Returns the selected button state.
+ * @param Button: Button to be checked
+ * This parameter can be one of the following values:
+ * @arg BUTTON_WAKEUP: Wakeup Push Button
+ * @arg BUTTON_TAMPER: Tamper Push Button
+ * @arg BUTTON_KEY: Key Push Button
+ * @note On STM32746G-Discovery board, the three buttons (Wakeup, Tamper and key buttons)
+ * are mapped on the same push button named "User"
+ * on the board serigraphy.
+ * @retval The Button GPIO pin value
+ */
+uint32_t BSP_PB_GetState(Button_TypeDef Button)
+{
+ return HAL_GPIO_ReadPin(BUTTON_PORT[Button], BUTTON_PIN[Button]);
+}
+
+/**
+ * @brief Configures COM port.
+ * @param COM: COM port to be configured.
+ * This parameter can be one of the following values:
+ * @arg COM1
+ * @arg COM2
+ * @param huart: Pointer to a UART_HandleTypeDef structure that contains the
+ * configuration information for the specified USART peripheral.
+ * @retval None
+ */
+void BSP_COM_Init(COM_TypeDef COM, UART_HandleTypeDef *huart)
+{
+ GPIO_InitTypeDef gpio_init_structure;
+
+ /* Enable GPIO clock */
+ DISCOVERY_COMx_TX_GPIO_CLK_ENABLE(COM);
+ DISCOVERY_COMx_RX_GPIO_CLK_ENABLE(COM);
+
+ /* Enable USART clock */
+ DISCOVERY_COMx_CLK_ENABLE(COM);
+
+ /* Configure USART Tx as alternate function */
+ gpio_init_structure.Pin = COM_TX_PIN[COM];
+ gpio_init_structure.Mode = GPIO_MODE_AF_PP;
+ gpio_init_structure.Speed = GPIO_SPEED_FAST;
+ gpio_init_structure.Pull = GPIO_PULLUP;
+ gpio_init_structure.Alternate = COM_TX_AF[COM];
+ HAL_GPIO_Init(COM_TX_PORT[COM], &gpio_init_structure);
+
+ /* Configure USART Rx as alternate function */
+ gpio_init_structure.Pin = COM_RX_PIN[COM];
+ gpio_init_structure.Mode = GPIO_MODE_AF_PP;
+ gpio_init_structure.Alternate = COM_RX_AF[COM];
+ HAL_GPIO_Init(COM_RX_PORT[COM], &gpio_init_structure);
+
+ /* USART configuration */
+ huart->Instance = COM_USART[COM];
+ HAL_UART_Init(huart);
+}
+
+/**
+ * @brief DeInit COM port.
+ * @param COM: COM port to be configured.
+ * This parameter can be one of the following values:
+ * @arg COM1
+ * @arg COM2
+ * @param huart: Pointer to a UART_HandleTypeDef structure that contains the
+ * configuration information for the specified USART peripheral.
+ * @retval None
+ */
+void BSP_COM_DeInit(COM_TypeDef COM, UART_HandleTypeDef *huart)
+{
+ /* USART configuration */
+ huart->Instance = COM_USART[COM];
+ HAL_UART_DeInit(huart);
+
+ /* Enable USART clock */
+ DISCOVERY_COMx_CLK_DISABLE(COM);
+
+ /* DeInit GPIO pins can be done in the application
+ (by surcharging this __weak function) */
+
+ /* GPIO pins clock, DMA clock can be shut down in the application
+ by surcharging this __weak function */
+}
+
+/*******************************************************************************
+ BUS OPERATIONS
+*******************************************************************************/
+
+/******************************* I2C Routines *********************************/
+/**
+ * @brief Initializes I2C MSP.
+ * @param i2c_handler : I2C handler
+ * @retval None
+ */
+static void I2Cx_MspInit(I2C_HandleTypeDef *i2c_handler)
+{
+ GPIO_InitTypeDef gpio_init_structure;
+
+ if (i2c_handler == (I2C_HandleTypeDef*)(&hI2cAudioHandler))
+ {
+ /* AUDIO and LCD I2C MSP init */
+
+ /*** Configure the GPIOs ***/
+ /* Enable GPIO clock */
+ DISCOVERY_AUDIO_I2Cx_SCL_SDA_GPIO_CLK_ENABLE();
+
+ /* Configure I2C Tx as alternate function */
+ gpio_init_structure.Pin = DISCOVERY_AUDIO_I2Cx_SCL_PIN;
+ gpio_init_structure.Mode = GPIO_MODE_AF_OD;
+ gpio_init_structure.Pull = GPIO_NOPULL;
+ gpio_init_structure.Speed = GPIO_SPEED_FAST;
+ gpio_init_structure.Alternate = DISCOVERY_AUDIO_I2Cx_SCL_SDA_AF;
+ HAL_GPIO_Init(DISCOVERY_AUDIO_I2Cx_SCL_SDA_GPIO_PORT, &gpio_init_structure);
+
+ /* Configure I2C Rx as alternate function */
+ gpio_init_structure.Pin = DISCOVERY_AUDIO_I2Cx_SDA_PIN;
+ HAL_GPIO_Init(DISCOVERY_AUDIO_I2Cx_SCL_SDA_GPIO_PORT, &gpio_init_structure);
+
+ /*** Configure the I2C peripheral ***/
+ /* Enable I2C clock */
+ DISCOVERY_AUDIO_I2Cx_CLK_ENABLE();
+
+ /* Force the I2C peripheral clock reset */
+ DISCOVERY_AUDIO_I2Cx_FORCE_RESET();
+
+ /* Release the I2C peripheral clock reset */
+ DISCOVERY_AUDIO_I2Cx_RELEASE_RESET();
+
+ /* Enable and set I2Cx Interrupt to a lower priority */
+ HAL_NVIC_SetPriority(DISCOVERY_AUDIO_I2Cx_EV_IRQn, 0x0F, 0);
+ HAL_NVIC_EnableIRQ(DISCOVERY_AUDIO_I2Cx_EV_IRQn);
+
+ /* Enable and set I2Cx Interrupt to a lower priority */
+ HAL_NVIC_SetPriority(DISCOVERY_AUDIO_I2Cx_ER_IRQn, 0x0F, 0);
+ HAL_NVIC_EnableIRQ(DISCOVERY_AUDIO_I2Cx_ER_IRQn);
+ }
+ else
+ {
+ /* External, camera and Arduino connector I2C MSP init */
+
+ /*** Configure the GPIOs ***/
+ /* Enable GPIO clock */
+ DISCOVERY_EXT_I2Cx_SCL_SDA_GPIO_CLK_ENABLE();
+
+ /* Configure I2C Tx as alternate function */
+ gpio_init_structure.Pin = DISCOVERY_EXT_I2Cx_SCL_PIN;
+ gpio_init_structure.Mode = GPIO_MODE_AF_OD;
+ gpio_init_structure.Pull = GPIO_NOPULL;
+ gpio_init_structure.Speed = GPIO_SPEED_FAST;
+ gpio_init_structure.Alternate = DISCOVERY_EXT_I2Cx_SCL_SDA_AF;
+ HAL_GPIO_Init(DISCOVERY_EXT_I2Cx_SCL_SDA_GPIO_PORT, &gpio_init_structure);
+
+ /* Configure I2C Rx as alternate function */
+ gpio_init_structure.Pin = DISCOVERY_EXT_I2Cx_SDA_PIN;
+ HAL_GPIO_Init(DISCOVERY_EXT_I2Cx_SCL_SDA_GPIO_PORT, &gpio_init_structure);
+
+ /*** Configure the I2C peripheral ***/
+ /* Enable I2C clock */
+ DISCOVERY_EXT_I2Cx_CLK_ENABLE();
+
+ /* Force the I2C peripheral clock reset */
+ DISCOVERY_EXT_I2Cx_FORCE_RESET();
+
+ /* Release the I2C peripheral clock reset */
+ DISCOVERY_EXT_I2Cx_RELEASE_RESET();
+
+ /* Enable and set I2Cx Interrupt to a lower priority */
+ HAL_NVIC_SetPriority(DISCOVERY_EXT_I2Cx_EV_IRQn, 0x0F, 0);
+ HAL_NVIC_EnableIRQ(DISCOVERY_EXT_I2Cx_EV_IRQn);
+
+ /* Enable and set I2Cx Interrupt to a lower priority */
+ HAL_NVIC_SetPriority(DISCOVERY_EXT_I2Cx_ER_IRQn, 0x0F, 0);
+ HAL_NVIC_EnableIRQ(DISCOVERY_EXT_I2Cx_ER_IRQn);
+ }
+}
+
+/**
+ * @brief Initializes I2C HAL.
+ * @param i2c_handler : I2C handler
+ * @retval None
+ */
+static void I2Cx_Init(I2C_HandleTypeDef *i2c_handler)
+{
+ if(HAL_I2C_GetState(i2c_handler) == HAL_I2C_STATE_RESET)
+ {
+ if (i2c_handler == (I2C_HandleTypeDef*)(&hI2cAudioHandler))
+ {
+ /* Audio and LCD I2C configuration */
+ i2c_handler->Instance = DISCOVERY_AUDIO_I2Cx;
+ }
+ else
+ {
+ /* External, camera and Arduino connector I2C configuration */
+ i2c_handler->Instance = DISCOVERY_EXT_I2Cx;
+ }
+ i2c_handler->Init.Timing = DISCOVERY_I2Cx_TIMING;
+ i2c_handler->Init.OwnAddress1 = 0;
+ i2c_handler->Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT;
+ i2c_handler->Init.DualAddressMode = I2C_DUALADDRESS_DISABLE;
+ i2c_handler->Init.OwnAddress2 = 0;
+ i2c_handler->Init.GeneralCallMode = I2C_GENERALCALL_DISABLE;
+ i2c_handler->Init.NoStretchMode = I2C_NOSTRETCH_DISABLE;
+
+ /* Init the I2C */
+ I2Cx_MspInit(i2c_handler);
+ HAL_I2C_Init(i2c_handler);
+ }
+}
+
+/**
+ * @brief Reads multiple data.
+ * @param i2c_handler : I2C handler
+ * @param Addr: I2C address
+ * @param Reg: Reg address
+ * @param MemAddress: Memory address
+ * @param Buffer: Pointer to data buffer
+ * @param Length: Length of the data
+ * @retval Number of read data
+ */
+static HAL_StatusTypeDef I2Cx_ReadMultiple(I2C_HandleTypeDef *i2c_handler,
+ uint8_t Addr,
+ uint16_t Reg,
+ uint16_t MemAddress,
+ uint8_t *Buffer,
+ uint16_t Length)
+{
+ HAL_StatusTypeDef status = HAL_OK;
+
+ status = HAL_I2C_Mem_Read(i2c_handler, Addr, (uint16_t)Reg, MemAddress, Buffer, Length, 1000);
+
+ /* Check the communication status */
+ if(status != HAL_OK)
+ {
+ /* I2C error occurred */
+ I2Cx_Error(i2c_handler, Addr);
+ }
+ return status;
+}
+
+/**
+ * @brief Writes a value in a register of the device through BUS in using DMA mode.
+ * @param i2c_handler : I2C handler
+ * @param Addr: Device address on BUS Bus.
+ * @param Reg: The target register address to write
+ * @param MemAddress: Memory address
+ * @param Buffer: The target register value to be written
+ * @param Length: buffer size to be written
+ * @retval HAL status
+ */
+static HAL_StatusTypeDef I2Cx_WriteMultiple(I2C_HandleTypeDef *i2c_handler,
+ uint8_t Addr,
+ uint16_t Reg,
+ uint16_t MemAddress,
+ uint8_t *Buffer,
+ uint16_t Length)
+{
+ HAL_StatusTypeDef status = HAL_OK;
+
+ status = HAL_I2C_Mem_Write(i2c_handler, Addr, (uint16_t)Reg, MemAddress, Buffer, Length, 1000);
+
+ /* Check the communication status */
+ if(status != HAL_OK)
+ {
+ /* Re-Initiaize the I2C Bus */
+ I2Cx_Error(i2c_handler, Addr);
+ }
+ return status;
+}
+
+/**
+ * @brief Checks if target device is ready for communication.
+ * @note This function is used with Memory devices
+ * @param i2c_handler : I2C handler
+ * @param DevAddress: Target device address
+ * @param Trials: Number of trials
+ * @retval HAL status
+ */
+static HAL_StatusTypeDef I2Cx_IsDeviceReady(I2C_HandleTypeDef *i2c_handler, uint16_t DevAddress, uint32_t Trials)
+{
+ return (HAL_I2C_IsDeviceReady(i2c_handler, DevAddress, Trials, 1000));
+}
+
+/**
+ * @brief Manages error callback by re-initializing I2C.
+ * @param i2c_handler : I2C handler
+ * @param Addr: I2C Address
+ * @retval None
+ */
+static void I2Cx_Error(I2C_HandleTypeDef *i2c_handler, uint8_t Addr)
+{
+ /* De-initialize the I2C communication bus */
+ HAL_I2C_DeInit(i2c_handler);
+
+ /* Re-Initialize the I2C communication bus */
+ I2Cx_Init(i2c_handler);
+}
+
+/*******************************************************************************
+ LINK OPERATIONS
+*******************************************************************************/
+
+/********************************* LINK AUDIO *********************************/
+
+/**
+ * @brief Initializes Audio low level.
+ * @retval None
+ */
+void AUDIO_IO_Init(void)
+{
+ I2Cx_Init(&hI2cAudioHandler);
+}
+
+/**
+ * @brief Deinitializes Audio low level.
+ * @retval None
+ */
+void AUDIO_IO_DeInit(void)
+{
+}
+
+/**
+ * @brief Writes a single data.
+ * @param Addr: I2C address
+ * @param Reg: Reg address
+ * @param Value: Data to be written
+ * @retval None
+ */
+void AUDIO_IO_Write(uint8_t Addr, uint16_t Reg, uint16_t Value)
+{
+ uint16_t tmp = Value;
+
+ Value = ((uint16_t)(tmp >> 8) & 0x00FF);
+
+ Value |= ((uint16_t)(tmp << 8)& 0xFF00);
+
+ I2Cx_WriteMultiple(&hI2cAudioHandler, Addr, Reg, I2C_MEMADD_SIZE_16BIT,(uint8_t*)&Value, 2);
+}
+
+/**
+ * @brief Reads a single data.
+ * @param Addr: I2C address
+ * @param Reg: Reg address
+ * @retval Data to be read
+ */
+uint16_t AUDIO_IO_Read(uint8_t Addr, uint16_t Reg)
+{
+ uint16_t read_value = 0, tmp = 0;
+
+ I2Cx_ReadMultiple(&hI2cAudioHandler, Addr, Reg, I2C_MEMADD_SIZE_16BIT, (uint8_t*)&read_value, 2);
+
+ tmp = ((uint16_t)(read_value >> 8) & 0x00FF);
+
+ tmp |= ((uint16_t)(read_value << 8)& 0xFF00);
+
+ read_value = tmp;
+
+ return read_value;
+}
+
+/**
+ * @brief AUDIO Codec delay
+ * @param Delay: Delay in ms
+ * @retval None
+ */
+void AUDIO_IO_Delay(uint32_t Delay)
+{
+ //HAL_Delay(Delay); // MBED
+ wait_ms(Delay); // MBED
+}
+
+/********************************* LINK CAMERA ********************************/
+
+/**
+ * @brief Initializes Camera low level.
+ * @retval None
+ */
+void CAMERA_IO_Init(void)
+{
+ I2Cx_Init(&hI2cExtHandler);
+}
+
+/**
+ * @brief Camera writes single data.
+ * @param Addr: I2C address
+ * @param Reg: Register address
+ * @param Value: Data to be written
+ * @retval None
+ */
+void CAMERA_IO_Write(uint8_t Addr, uint8_t Reg, uint8_t Value)
+{
+ I2Cx_WriteMultiple(&hI2cExtHandler, Addr, (uint16_t)Reg, I2C_MEMADD_SIZE_8BIT,(uint8_t*)&Value, 1);
+}
+
+/**
+ * @brief Camera reads single data.
+ * @param Addr: I2C address
+ * @param Reg: Register address
+ * @retval Read data
+ */
+uint8_t CAMERA_IO_Read(uint8_t Addr, uint8_t Reg)
+{
+ uint8_t read_value = 0;
+
+ I2Cx_ReadMultiple(&hI2cExtHandler, Addr, Reg, I2C_MEMADD_SIZE_8BIT, (uint8_t*)&read_value, 1);
+
+ return read_value;
+}
+
+/**
+ * @brief Camera delay
+ * @param Delay: Delay in ms
+ * @retval None
+ */
+void CAMERA_Delay(uint32_t Delay)
+{
+ //HAL_Delay(Delay); // MBED
+ wait_ms(Delay); // MBED
+}
+
+/******************************** LINK I2C EEPROM *****************************/
+
+/**
+ * @brief Initializes peripherals used by the I2C EEPROM driver.
+ * @retval None
+ */
+void EEPROM_IO_Init(void)
+{
+ I2Cx_Init(&hI2cExtHandler);
+}
+
+/**
+ * @brief Write data to I2C EEPROM driver in using DMA channel.
+ * @param DevAddress: Target device address
+ * @param MemAddress: Internal memory address
+ * @param pBuffer: Pointer to data buffer
+ * @param BufferSize: Amount of data to be sent
+ * @retval HAL status
+ */
+HAL_StatusTypeDef EEPROM_IO_WriteData(uint16_t DevAddress, uint16_t MemAddress, uint8_t* pBuffer, uint32_t BufferSize)
+{
+ return (I2Cx_WriteMultiple(&hI2cExtHandler, DevAddress, MemAddress, I2C_MEMADD_SIZE_16BIT, pBuffer, BufferSize));
+}
+
+/**
+ * @brief Read data from I2C EEPROM driver in using DMA channel.
+ * @param DevAddress: Target device address
+ * @param MemAddress: Internal memory address
+ * @param pBuffer: Pointer to data buffer
+ * @param BufferSize: Amount of data to be read
+ * @retval HAL status
+ */
+HAL_StatusTypeDef EEPROM_IO_ReadData(uint16_t DevAddress, uint16_t MemAddress, uint8_t* pBuffer, uint32_t BufferSize)
+{
+ return (I2Cx_ReadMultiple(&hI2cExtHandler, DevAddress, MemAddress, I2C_MEMADD_SIZE_16BIT, pBuffer, BufferSize));
+}
+
+/**
+ * @brief Checks if target device is ready for communication.
+ * @note This function is used with Memory devices
+ * @param DevAddress: Target device address
+ * @param Trials: Number of trials
+ * @retval HAL status
+ */
+HAL_StatusTypeDef EEPROM_IO_IsDeviceReady(uint16_t DevAddress, uint32_t Trials)
+{
+ return (I2Cx_IsDeviceReady(&hI2cExtHandler, DevAddress, Trials));
+}
+
+/********************************* LINK TOUCHSCREEN *********************************/
+
+/**
+ * @brief Initializes Touchscreen low level.
+ * @retval None
+ */
+void TS_IO_Init(void)
+{
+ I2Cx_Init(&hI2cAudioHandler);
+}
+
+/**
+ * @brief Writes a single data.
+ * @param Addr: I2C address
+ * @param Reg: Reg address
+ * @param Value: Data to be written
+ * @retval None
+ */
+void TS_IO_Write(uint8_t Addr, uint8_t Reg, uint8_t Value)
+{
+ I2Cx_WriteMultiple(&hI2cAudioHandler, Addr, (uint16_t)Reg, I2C_MEMADD_SIZE_8BIT,(uint8_t*)&Value, 1);
+}
+
+/**
+ * @brief Reads a single data.
+ * @param Addr: I2C address
+ * @param Reg: Reg address
+ * @retval Data to be read
+ */
+uint8_t TS_IO_Read(uint8_t Addr, uint8_t Reg)
+{
+ uint8_t read_value = 0;
+
+ I2Cx_ReadMultiple(&hI2cAudioHandler, Addr, Reg, I2C_MEMADD_SIZE_8BIT, (uint8_t*)&read_value, 1);
+
+ return read_value;
+}
+
+/**
+ * @brief TS delay
+ * @param Delay: Delay in ms
+ * @retval None
+ */
+void TS_IO_Delay(uint32_t Delay)
+{
+ //HAL_Delay(Delay); // MBED
+ wait_ms(Delay); // MBED
+}
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/