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/**

  ******************************************************************************

  * @file    stm32l1xx_ll_fsmc.c

  * @author  MCD Application Team

  * @brief   FSMC Low Layer HAL module driver.

  *

  *          This file provides firmware functions to manage the following

  *          functionalities of the Flexible Memory Controller (FSMC) peripheral memories:

  *           + Initialization/de-initialization functions

  *           + Peripheral Control functions

  *           + Peripheral State functions

  *

  ******************************************************************************

  * @attention

  *

  * Copyright (c) 2016 STMicroelectronics.

  * All rights reserved.

  *

  * This software is licensed under terms that can be found in the LICENSE file

  * in the root directory of this software component.

  * If no LICENSE file comes with this software, it is provided AS-IS.

  *

  ******************************************************************************

  @verbatim

  ==============================================================================

                        ##### FSMC peripheral features #####

  ==============================================================================

  [..] The Flexible memory controller (FSMC) includes following memory controllers:

       (+) The NOR/PSRAM memory controller

  [..] The FSMC functional block makes the interface with synchronous and asynchronous static

       memories. Its main purposes are:

       (+) to translate AHB transactions into the appropriate external device protocol

       (+) to meet the access time requirements of the external memory devices

  [..] All external memories share the addresses, data and control signals with the controller.

       Each external device is accessed by means of a unique Chip Select. The FSMC performs

       only one access at a time to an external device.

       The main features of the FSMC controller are the following:

        (+) Interface with static-memory mapped devices including:

           (++) Static random access memory (SRAM)

           (++) Read-only memory (ROM)

           (++) NOR Flash memory/OneNAND Flash memory

           (++) PSRAM (4 memory banks)

        (+) Independent Chip Select control for each memory bank

        (+) Independent configuration for each memory bank

  @endverbatim

  ******************************************************************************

  */

/* Includes ------------------------------------------------------------------*/

#include "stm32l1xx_hal.h"

/** @addtogroup STM32L1xx_HAL_Driver

  * @{

  */

#if defined(HAL_NOR_MODULE_ENABLED) || defined(HAL_SRAM_MODULE_ENABLED)

/** @defgroup FSMC_LL  FSMC Low Layer

  * @brief FSMC driver modules

  * @{

  */

/* Private typedef -----------------------------------------------------------*/

/* Private define ------------------------------------------------------------*/

/** @defgroup FSMC_LL_Private_Constants FSMC Low Layer Private Constants

  * @{

  */

/* ----------------------- FSMC registers bit mask --------------------------- */

#if defined(FSMC_BANK1)

/* --- BCR Register ---*/

/* BCR register clear mask */

/* --- BTR Register ---*/

/* BTR register clear mask */

#define BTR_CLEAR_MASK    ((uint32_t)(FSMC_BTRx_ADDSET | FSMC_BTRx_ADDHLD  |\

                                      FSMC_BTRx_DATAST | FSMC_BTRx_BUSTURN |\

                                      FSMC_BTRx_CLKDIV | FSMC_BTRx_DATLAT  |\

                                      FSMC_BTRx_ACCMOD))

/* --- BWTR Register ---*/

/* BWTR register clear mask */

#define BWTR_CLEAR_MASK   ((uint32_t)(FSMC_BWTRx_ADDSET | FSMC_BWTRx_ADDHLD  |\

                                      FSMC_BWTRx_DATAST | FSMC_BWTRx_BUSTURN |\

                                      FSMC_BWTRx_ACCMOD))

#endif /* FSMC_BANK1 */

/**

  * @}

  */

/* Private macro -------------------------------------------------------------*/

/* Private variables ---------------------------------------------------------*/

/* Private function prototypes -----------------------------------------------*/

/* Exported functions --------------------------------------------------------*/

/** @defgroup FSMC_LL_Exported_Functions FSMC Low Layer Exported Functions

  * @{

  */

#if defined(FSMC_BANK1)

/** @defgroup FSMC_LL_Exported_Functions_NORSRAM FSMC Low Layer NOR SRAM Exported Functions

  * @brief  NORSRAM Controller functions

  *

  @verbatim

  ==============================================================================

                   ##### How to use NORSRAM device driver #####

  ==============================================================================

  [..]

    This driver contains a set of APIs to interface with the FSMC NORSRAM banks in order

    to run the NORSRAM external devices.

    (+) FSMC NORSRAM bank reset using the function FSMC_NORSRAM_DeInit()

    (+) FSMC NORSRAM bank control configuration using the function FSMC_NORSRAM_Init()

    (+) FSMC NORSRAM bank timing configuration using the function FSMC_NORSRAM_Timing_Init()

    (+) FSMC NORSRAM bank extended timing configuration using the function

        FSMC_NORSRAM_Extended_Timing_Init()

    (+) FSMC NORSRAM bank enable/disable write operation using the functions

        FSMC_NORSRAM_WriteOperation_Enable()/FSMC_NORSRAM_WriteOperation_Disable()

@endverbatim

  * @{

  */

/** @defgroup FSMC_LL_NORSRAM_Exported_Functions_Group1 Initialization and de-initialization functions

  * @brief    Initialization and Configuration functions

  *

  @verbatim

  ==============================================================================

              ##### Initialization and de_initialization functions #####

  ==============================================================================

  [..]

    This section provides functions allowing to:

    (+) Initialize and configure the FSMC NORSRAM interface

    (+) De-initialize the FSMC NORSRAM interface

    (+) Configure the FSMC clock and associated GPIOs

@endverbatim

  * @{

  */

/**

  * @brief  Initialize the FSMC_NORSRAM device according to the specified

  *         control parameters in the FSMC_NORSRAM_InitTypeDef

  * @param  Device Pointer to NORSRAM device instance

  * @param  Init Pointer to NORSRAM Initialization structure

  * @retval HAL status

  */

HAL_StatusTypeDef  FSMC_NORSRAM_Init(FSMC_NORSRAM_TypeDef *Device,

                                    FSMC_NORSRAM_InitTypeDef *Init)

{

  uint32_t flashaccess;

  uint32_t btcr_reg;

  uint32_t mask;

  /* Check the parameters */

  assert_param(IS_FSMC_NORSRAM_DEVICE(Device));

  assert_param(IS_FSMC_NORSRAM_BANK(Init->NSBank));

  assert_param(IS_FSMC_MUX(Init->DataAddressMux));

  assert_param(IS_FSMC_MEMORY(Init->MemoryType));

  assert_param(IS_FSMC_NORSRAM_MEMORY_WIDTH(Init->MemoryDataWidth));

  assert_param(IS_FSMC_BURSTMODE(Init->BurstAccessMode));

  assert_param(IS_FSMC_WAIT_POLARITY(Init->WaitSignalPolarity));

  assert_param(IS_FSMC_WRAP_MODE(Init->WrapMode));

  assert_param(IS_FSMC_WAIT_SIGNAL_ACTIVE(Init->WaitSignalActive));

  assert_param(IS_FSMC_WRITE_OPERATION(Init->WriteOperation));

  assert_param(IS_FSMC_WAITE_SIGNAL(Init->WaitSignal));

  assert_param(IS_FSMC_EXTENDED_MODE(Init->ExtendedMode));

  assert_param(IS_FSMC_ASYNWAIT(Init->AsynchronousWait));

  assert_param(IS_FSMC_WRITE_BURST(Init->WriteBurst));

  assert_param(IS_FSMC_PAGESIZE(Init->PageSize));

  /* Disable NORSRAM Device */

  __FSMC_NORSRAM_DISABLE(Device, Init->NSBank);

  /* Set NORSRAM device control parameters */

  if (Init->MemoryType == FSMC_MEMORY_TYPE_NOR)

  {

    flashaccess = FSMC_NORSRAM_FLASH_ACCESS_ENABLE;

  }

  else

  {

    flashaccess = FSMC_NORSRAM_FLASH_ACCESS_DISABLE;

  }

  btcr_reg = (flashaccess                   | \

              Init->DataAddressMux          | \

              Init->MemoryType              | \

              Init->MemoryDataWidth         | \

              Init->BurstAccessMode         | \

              Init->WaitSignalPolarity      | \

              Init->WaitSignalActive        | \

              Init->WriteOperation          | \

              Init->WaitSignal              | \

              Init->ExtendedMode            | \

              Init->AsynchronousWait        | \

              Init->WriteBurst);

  btcr_reg |= Init->WrapMode;

  btcr_reg |= Init->PageSize;

  mask = (FSMC_BCRx_MBKEN                |

          FSMC_BCRx_MUXEN                |

          FSMC_BCRx_MTYP                 |

          FSMC_BCRx_MWID                 |

          FSMC_BCRx_FACCEN               |

          FSMC_BCRx_BURSTEN              |

          FSMC_BCRx_WAITPOL              |

          FSMC_BCRx_WAITCFG              |

          FSMC_BCRx_WREN                 |

          FSMC_BCRx_WAITEN               |

          FSMC_BCRx_EXTMOD               |

          FSMC_BCRx_ASYNCWAIT            |

          FSMC_BCRx_CBURSTRW);

  mask |= FSMC_BCRx_WRAPMOD;

  mask |= FSMC_BCRx_CPSIZE;

  MODIFY_REG(Device->BTCR[Init->NSBank], mask, btcr_reg);

  return HAL_OK;

}

/**

  * @brief  DeInitialize the FSMC_NORSRAM peripheral

  * @param  Device Pointer to NORSRAM device instance

  * @param  ExDevice Pointer to NORSRAM extended mode device instance

  * @param  Bank NORSRAM bank number

  * @retval HAL status

  */

HAL_StatusTypeDef FSMC_NORSRAM_DeInit(FSMC_NORSRAM_TypeDef *Device,

                                     FSMC_NORSRAM_EXTENDED_TypeDef *ExDevice, uint32_t Bank)

{

  /* Check the parameters */

  assert_param(IS_FSMC_NORSRAM_DEVICE(Device));

  assert_param(IS_FSMC_NORSRAM_EXTENDED_DEVICE(ExDevice));

  assert_param(IS_FSMC_NORSRAM_BANK(Bank));

  /* Disable the FSMC_NORSRAM device */

  __FSMC_NORSRAM_DISABLE(Device, Bank);

  /* De-initialize the FSMC_NORSRAM device */

  /* FSMC_NORSRAM_BANK1 */

  if (Bank == FSMC_NORSRAM_BANK1)

  {

    Device->BTCR[Bank] = 0x000030DBU;

  }

  /* FSMC_NORSRAM_BANK2, FSMC_NORSRAM_BANK3 or FSMC_NORSRAM_BANK4 */

  else

  {

    Device->BTCR[Bank] = 0x000030D2U;

  }

  Device->BTCR[Bank + 1U] = 0x0FFFFFFFU;

  ExDevice->BWTR[Bank]   = 0x0FFFFFFFU;

  return HAL_OK;

}

/**

  * @brief  Initialize the FSMC_NORSRAM Timing according to the specified

  *         parameters in the FSMC_NORSRAM_TimingTypeDef

  * @param  Device Pointer to NORSRAM device instance

  * @param  Timing Pointer to NORSRAM Timing structure

  * @param  Bank NORSRAM bank number

  * @retval HAL status

  */

HAL_StatusTypeDef FSMC_NORSRAM_Timing_Init(FSMC_NORSRAM_TypeDef *Device,

                                          FSMC_NORSRAM_TimingTypeDef *Timing, uint32_t Bank)

{

  /* Check the parameters */

  assert_param(IS_FSMC_NORSRAM_DEVICE(Device));

  assert_param(IS_FSMC_ADDRESS_SETUP_TIME(Timing->AddressSetupTime));

  assert_param(IS_FSMC_ADDRESS_HOLD_TIME(Timing->AddressHoldTime));

  assert_param(IS_FSMC_DATASETUP_TIME(Timing->DataSetupTime));

  assert_param(IS_FSMC_TURNAROUND_TIME(Timing->BusTurnAroundDuration));

  assert_param(IS_FSMC_CLK_DIV(Timing->CLKDivision));

  assert_param(IS_FSMC_DATA_LATENCY(Timing->DataLatency));

  assert_param(IS_FSMC_ACCESS_MODE(Timing->AccessMode));

  assert_param(IS_FSMC_NORSRAM_BANK(Bank));

  /* Set FSMC_NORSRAM device timing parameters */

  MODIFY_REG(Device->BTCR[Bank + 1U], BTR_CLEAR_MASK, (Timing->AddressSetupTime                                  |

                                                       ((Timing->AddressHoldTime)        << FSMC_BTRx_ADDHLD_Pos)  |

                                                       ((Timing->DataSetupTime)          << FSMC_BTRx_DATAST_Pos)  |

                                                       ((Timing->BusTurnAroundDuration)  << FSMC_BTRx_BUSTURN_Pos) |

                                                       (((Timing->CLKDivision) - 1U)     << FSMC_BTRx_CLKDIV_Pos)  |

                                                       (((Timing->DataLatency) - 2U)     << FSMC_BTRx_DATLAT_Pos)  |

                                                       (Timing->AccessMode)));

  return HAL_OK;

}

/**

  * @brief  Initialize the FSMC_NORSRAM Extended mode Timing according to the specified

  *         parameters in the FSMC_NORSRAM_TimingTypeDef

  * @param  Device Pointer to NORSRAM device instance

  * @param  Timing Pointer to NORSRAM Timing structure

  * @param  Bank NORSRAM bank number

  * @param  ExtendedMode FSMC Extended Mode

  *          This parameter can be one of the following values:

  *            @arg FSMC_EXTENDED_MODE_DISABLE

  *            @arg FSMC_EXTENDED_MODE_ENABLE

  * @retval HAL status

  */

HAL_StatusTypeDef FSMC_NORSRAM_Extended_Timing_Init(FSMC_NORSRAM_EXTENDED_TypeDef *Device,

                                                   FSMC_NORSRAM_TimingTypeDef *Timing, uint32_t Bank,

                                                   uint32_t ExtendedMode)

{

  /* Check the parameters */

  assert_param(IS_FSMC_EXTENDED_MODE(ExtendedMode));

  /* Set NORSRAM device timing register for write configuration, if extended mode is used */

  if (ExtendedMode == FSMC_EXTENDED_MODE_ENABLE)

  {

    /* Check the parameters */

    assert_param(IS_FSMC_NORSRAM_EXTENDED_DEVICE(Device));

    assert_param(IS_FSMC_ADDRESS_SETUP_TIME(Timing->AddressSetupTime));

    assert_param(IS_FSMC_ADDRESS_HOLD_TIME(Timing->AddressHoldTime));

    assert_param(IS_FSMC_DATASETUP_TIME(Timing->DataSetupTime));

    assert_param(IS_FSMC_TURNAROUND_TIME(Timing->BusTurnAroundDuration));

    assert_param(IS_FSMC_ACCESS_MODE(Timing->AccessMode));

    assert_param(IS_FSMC_NORSRAM_BANK(Bank));

    /* Set NORSRAM device timing register for write configuration, if extended mode is used */

    MODIFY_REG(Device->BWTR[Bank], BWTR_CLEAR_MASK, (Timing->AddressSetupTime                                    |

                                                     ((Timing->AddressHoldTime)        << FSMC_BWTRx_ADDHLD_Pos)  |

                                                     ((Timing->DataSetupTime)          << FSMC_BWTRx_DATAST_Pos)  |

                                                     Timing->AccessMode                                          |

                                                     ((Timing->BusTurnAroundDuration)  << FSMC_BWTRx_BUSTURN_Pos)));

  }

  else

  {

    Device->BWTR[Bank] = 0x0FFFFFFFU;

  }

  return HAL_OK;

}

/**

  * @}

  */

/** @addtogroup FSMC_LL_NORSRAM_Private_Functions_Group2

  *  @brief   management functions

  *

@verbatim

  ==============================================================================

                      ##### FSMC_NORSRAM Control functions #####

  ==============================================================================

  [..]

    This subsection provides a set of functions allowing to control dynamically

    the FSMC NORSRAM interface.

@endverbatim

  * @{

  */

/**

  * @brief  Enables dynamically FSMC_NORSRAM write operation.

  * @param  Device Pointer to NORSRAM device instance

  * @param  Bank NORSRAM bank number

  * @retval HAL status

  */

HAL_StatusTypeDef FSMC_NORSRAM_WriteOperation_Enable(FSMC_NORSRAM_TypeDef *Device, uint32_t Bank)

{

  /* Check the parameters */

  assert_param(IS_FSMC_NORSRAM_DEVICE(Device));

  assert_param(IS_FSMC_NORSRAM_BANK(Bank));

  /* Enable write operation */

  SET_BIT(Device->BTCR[Bank], FSMC_WRITE_OPERATION_ENABLE);

  return HAL_OK;

}

/**

  * @brief  Disables dynamically FSMC_NORSRAM write operation.

  * @param  Device Pointer to NORSRAM device instance

  * @param  Bank NORSRAM bank number

  * @retval HAL status

  */

HAL_StatusTypeDef FSMC_NORSRAM_WriteOperation_Disable(FSMC_NORSRAM_TypeDef *Device, uint32_t Bank)

{

  /* Check the parameters */

  assert_param(IS_FSMC_NORSRAM_DEVICE(Device));

  assert_param(IS_FSMC_NORSRAM_BANK(Bank));

  /* Disable write operation */

  CLEAR_BIT(Device->BTCR[Bank], FSMC_WRITE_OPERATION_ENABLE);

  return HAL_OK;

}

/**

  * @}

  */

/**

  * @}

  */

#endif /* FSMC_BANK1 */

/**

  * @}

  */

/**

  * @}

  */

#endif /* HAL_NOR_MODULE_ENABLED */

/**

  * @}

  */

/**

  * @}

  */