spd-lorabees/Src/hw_i2c.c

/**
  ******************************************************************************
  * File Name          : I2C.c
  * Description        : This file provides code for the configuration
  *                      of the I2C instances.
  ******************************************************************************
  ** This notice applies to any and all portions of this file
  * that are not between comment pairs USER CODE BEGIN and
  * USER CODE END. Other portions of this file, whether 
  * inserted by the user or by software development tools
  * are owned by their respective copyright owners.
  *
  * COPYRIGHT(c) 2017 STMicroelectronics
  *
  * 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 "hw.h"
#include "hw_i2c.h"
#include "debug.h"

static inline uint32_t setupTiming(void)
{
	const uint32_t presc = 15;

	// delays
	const uint32_t sdadel = 2;
	const uint32_t scldel = 2;

	const uint32_t scll = 6;
	const uint32_t sclh = 7;

	return presc << I2C_TIMINGR_PRESC_Pos |
			scldel << I2C_TIMINGR_SCLDEL_Pos |
			sdadel << I2C_TIMINGR_SDADEL_Pos |
			sclh << I2C_TIMINGR_SCLH_Pos |
			scll << I2C_TIMINGR_SCLL_Pos;
}

I2C_HandleTypeDef hi2c1;

/* I2C1 init function */
void HW_I2C_Init(void)
{
	hi2c1.Instance = I2C1;
	hi2c1.Init.Timing = setupTiming(); //0x00000708;
	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(__FILE__, __LINE__);
	}

	/**Configure Analogue filter
	*/
	if (HAL_I2CEx_ConfigAnalogFilter(&hi2c1, I2C_ANALOGFILTER_ENABLE) != HAL_OK)
	{
		_Error_Handler(__FILE__, __LINE__);
	}

	/**Configure Digital filter
	*/
	if (HAL_I2CEx_ConfigDigitalFilter(&hi2c1, 0) != HAL_OK)
	{
		_Error_Handler(__FILE__, __LINE__);
	}

}


/* I2C1 init function */
void HW_I2C_DeInit(void)
{
	HAL_I2C_DeInit(&hi2c1);
}

void HAL_I2C_MspInit(I2C_HandleTypeDef* i2cHandle)
{

	GPIO_InitTypeDef GPIO_InitStruct;
	if(i2cHandle->Instance==I2C1)
	{
		/* USER CODE BEGIN I2C1_MspInit 0 */

		/* USER CODE END I2C1_MspInit 0 */

		/**I2C1 GPIO Configuration
		PB8     ------> I2C1_SCL
		PB9     ------> I2C1_SDA
		*/
		GPIO_InitStruct.Pin = GPIO_PIN_8|GPIO_PIN_9;
		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);

		/* I2C1 clock enable */
		__HAL_RCC_I2C1_CLK_ENABLE();
		/* USER CODE BEGIN I2C1_MspInit 1 */

		/* USER CODE END I2C1_MspInit 1 */
	}
}

void HAL_I2C_MspDeInit(I2C_HandleTypeDef* i2cHandle)
{

	if(i2cHandle->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
		PB8     ------> I2C1_SCL
		PB9     ------> I2C1_SDA
		*/
		HAL_GPIO_DeInit(GPIOB, GPIO_PIN_8|GPIO_PIN_9);

		/* USER CODE BEGIN I2C1_MspDeInit 1 */

		/* USER CODE END I2C1_MspDeInit 1 */
	}
}

/* USER CODE BEGIN 1 */

/* USER CODE END 1 */

/**
  * @}
  */

/**
  * @}
  */

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