/**
  ******************************************************************************
  * File Name          : FSMC.c
  * Description        : This file provides code for the configuration
  *                      of the FSMC peripheral.
  ******************************************************************************
  *
  * COPYRIGHT(c) 2016 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 "fsmc.h"

#include "gpio.h"

/* USER CODE BEGIN 0 */

/* USER CODE END 0 */

SRAM_HandleTypeDef hsram1;

/* FSMC initialization function */
void MX_FSMC_Init(void)
{
  FSMC_NORSRAM_TimingTypeDef Timing;

  /** Perform the SRAM1 memory initialization sequence
  */
  hsram1.Instance = FSMC_NORSRAM_DEVICE;
  hsram1.Extended = FSMC_NORSRAM_EXTENDED_DEVICE;
  /* hsram1.Init */
  hsram1.Init.NSBank = FSMC_NORSRAM_BANK1;
  hsram1.Init.DataAddressMux = FSMC_DATA_ADDRESS_MUX_ENABLE;
  hsram1.Init.MemoryType = FSMC_MEMORY_TYPE_PSRAM;
  hsram1.Init.MemoryDataWidth = FSMC_NORSRAM_MEM_BUS_WIDTH_16;
  hsram1.Init.BurstAccessMode = FSMC_BURST_ACCESS_MODE_DISABLE;
  hsram1.Init.WaitSignalPolarity = FSMC_WAIT_SIGNAL_POLARITY_LOW;
  hsram1.Init.WrapMode = FSMC_WRAP_MODE_DISABLE;
  hsram1.Init.WaitSignalActive = FSMC_WAIT_TIMING_BEFORE_WS;
  hsram1.Init.WriteOperation = FSMC_WRITE_OPERATION_ENABLE;
  hsram1.Init.WaitSignal = FSMC_WAIT_SIGNAL_DISABLE;
  hsram1.Init.ExtendedMode = FSMC_EXTENDED_MODE_DISABLE;
  hsram1.Init.AsynchronousWait = FSMC_ASYNCHRONOUS_WAIT_DISABLE;
  hsram1.Init.WriteBurst = FSMC_WRITE_BURST_DISABLE;
  /* Timing */

  // 1 clock to read the address, + 1 for synchroniser skew
  Timing.AddressSetupTime = 2;
  Timing.AddressHoldTime = 1;

  // Writes to device:
  //   1 for synchroniser skew (dbx also delayed)
  //   1 to skip hold time
  //   1 to write data.

  // Reads from device:
  //   3 for syncroniser
  //   1 to write back to fsmc bus.
  Timing.DataSetupTime = 4;

  // Allow a clock for us to release signals
  // Need to avoid both devices acting as outputs
  // on the multiplexed lines at the same time.
  Timing.BusTurnAroundDuration = 1;

  Timing.CLKDivision = 16; // Ignored for async
  Timing.DataLatency = 17; // Ignored for async
  Timing.AccessMode = FSMC_ACCESS_MODE_A;
  /* ExtTiming */

  HAL_SRAM_Init(&hsram1, &Timing, NULL);

}

static int FSMC_Initialized = 0;

static void HAL_FSMC_MspInit(void){
  /* USER CODE BEGIN FSMC_MspInit 0 */

  /* USER CODE END FSMC_MspInit 0 */
  GPIO_InitTypeDef GPIO_InitStruct;
  if (FSMC_Initialized) {
    return;
  }
  FSMC_Initialized = 1;
  /* Peripheral clock enable */
  __FSMC_CLK_ENABLE();
  
  /** FSMC GPIO Configuration  
  PE7   ------> FSMC_DA4
  PE8   ------> FSMC_DA5
  PE9   ------> FSMC_DA6
  PE10   ------> FSMC_DA7
  PE11   ------> FSMC_DA8
  PE12   ------> FSMC_DA9
  PE13   ------> FSMC_DA10
  PE14   ------> FSMC_DA11
  PE15   ------> FSMC_DA12
  PD14   ------> FSMC_DA0
  PD15   ------> FSMC_DA1
  PD0   ------> FSMC_DA2
  PD1   ------> FSMC_DA3
  PD4   ------> FSMC_NOE
  PD5   ------> FSMC_NWE
  PD7   ------> FSMC_NE1
  PD8   ------> FSMC_DA13
  PD9   ------> FSMC_DA14
  PD10  ------> FSMC_DA15
  PB7   ------> FSMC_NL
  PE0   ------> FSMC_NBL0
  PE1   ------> FSMC_NBL1
  */
  // MM: GPIO_SPEED_FREQ_MEDIUM is rated up to 50MHz, which is fine as all the
  // fsmc timings are > 1 (ie. so clock speed / 2 is around 50MHz).

  /* GPIO_InitStruct */
  GPIO_InitStruct.Pin = GPIO_PIN_0|GPIO_PIN_1|GPIO_PIN_7|GPIO_PIN_8|GPIO_PIN_9|GPIO_PIN_10|GPIO_PIN_11|GPIO_PIN_12|GPIO_PIN_13|GPIO_PIN_14|GPIO_PIN_15;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_MEDIUM; //HIGH;
  GPIO_InitStruct.Alternate = GPIO_AF12_FSMC;

  HAL_GPIO_Init(GPIOE, &GPIO_InitStruct);

  /* GPIO_InitStruct */
  GPIO_InitStruct.Pin = GPIO_PIN_14|GPIO_PIN_15|GPIO_PIN_0|GPIO_PIN_1 
                          |GPIO_PIN_4|GPIO_PIN_5|GPIO_PIN_7|GPIO_PIN_8|GPIO_PIN_9|GPIO_PIN_10;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_MEDIUM; //HIGH;
  GPIO_InitStruct.Alternate = GPIO_AF12_FSMC;

  HAL_GPIO_Init(GPIOD, &GPIO_InitStruct);

  /* GPIO_InitStruct */
  GPIO_InitStruct.Pin = GPIO_PIN_7;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_MEDIUM;//HIGH;
  GPIO_InitStruct.Alternate = GPIO_AF12_FSMC;

  HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

  /* USER CODE BEGIN FSMC_MspInit 1 */

  /* USER CODE END FSMC_MspInit 1 */
}

void HAL_SRAM_MspInit(SRAM_HandleTypeDef* hsram){
  /* USER CODE BEGIN SRAM_MspInit 0 */

  /* USER CODE END SRAM_MspInit 0 */
  HAL_FSMC_MspInit();
  /* USER CODE BEGIN SRAM_MspInit 1 */

  /* USER CODE END SRAM_MspInit 1 */
}

static int FSMC_DeInitialized = 0;

static void HAL_FSMC_MspDeInit(void){
  /* USER CODE BEGIN FSMC_MspDeInit 0 */

  /* USER CODE END FSMC_MspDeInit 0 */
  if (FSMC_DeInitialized) {
    return;
  }
  FSMC_DeInitialized = 1;
  /* Peripheral clock enable */
  __FSMC_CLK_DISABLE();
  
  /** FSMC GPIO Configuration  
  PE7   ------> FSMC_DA4
  PE8   ------> FSMC_DA5
  PE9   ------> FSMC_DA6
  PE10   ------> FSMC_DA7
  PE11   ------> FSMC_DA8
  PE12   ------> FSMC_DA9
  PE13   ------> FSMC_DA10
  PE14   ------> FSMC_DA11
  PE15   ------> FSMC_DA12
  PD14   ------> FSMC_DA0
  PD15   ------> FSMC_DA1
  PD0   ------> FSMC_DA2
  PD1   ------> FSMC_DA3
  PD4   ------> FSMC_NOE
  PD5   ------> FSMC_NWE
  PD7   ------> FSMC_NE1
  PD8   ------> FSMC_DA13
  PD9   ------> FSMC_DA14
  PD10  ------> FSMC_DA15
  PB7   ------> FSMC_NL
  PE0   ------> FSMC_NBL0
  PE1   ------> FSMC_NBL1
  */

  HAL_GPIO_DeInit(GPIOE, GPIO_PIN_0|GPIO_PIN_1|GPIO_PIN_7|GPIO_PIN_8|GPIO_PIN_9|GPIO_PIN_10|GPIO_PIN_11|GPIO_PIN_12|GPIO_PIN_13|GPIO_PIN_14|GPIO_PIN_15);

  HAL_GPIO_DeInit(GPIOD, GPIO_PIN_14|GPIO_PIN_15|GPIO_PIN_0|GPIO_PIN_1 
                          |GPIO_PIN_4|GPIO_PIN_5|GPIO_PIN_7|GPIO_PIN_8|GPIO_PIN_9|GPIO_PIN_10);

  HAL_GPIO_DeInit(GPIOB, GPIO_PIN_7);

  /* USER CODE BEGIN FSMC_MspDeInit 1 */

  /* USER CODE END FSMC_MspDeInit 1 */
}

void HAL_SRAM_MspDeInit(SRAM_HandleTypeDef* hsram){
  /* USER CODE BEGIN SRAM_MspDeInit 0 */

  /* USER CODE END SRAM_MspDeInit 0 */
  HAL_FSMC_MspDeInit();
  /* USER CODE BEGIN SRAM_MspDeInit 1 */

  /* USER CODE END SRAM_MspDeInit 1 */
}
/**
  * @}
  */

/**
  * @}
  */

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