/**
  ******************************************************************************
  * @file    stm3210e_eval_nor.c
  * @author  MCD Application Team
  * @version V7.0.0
  * @date    14-April-2017
  * @brief   This file includes a standard driver for the M29W128GL70ZA6E NOR flash memory 
  *          device mounted on STM3210E-EVAL evaluation board.
  ******************************************************************************
  * @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.
  *
  ******************************************************************************
  */ 

/* File Info : -----------------------------------------------------------------
                                   User NOTES
1. How To use this driver:
--------------------------
   - This driver is used to drive the M29W128GL NOR flash external memory mounted
     on STM3210E-EVAL evaluation board.
   - This driver does not need a specific component driver for the NOR device
     to be included with.

2. Driver description:
---------------------
  + Initialization steps:
     o Initialize the NOR external memory using the BSP_NOR_Init() function. This 
       function includes the MSP layer hardware resources initialization and the
       FSMC controller configuration to interface with the external NOR memory.
  
  + NOR flash operations
     o NOR external memory can be accessed with read/write operations once it is
       initialized.
       Read/write operation can be performed with AHB access using the functions
       BSP_NOR_ReadData()/BSP_NOR_WriteData(). The BSP_NOR_WriteData() performs write operation
       of an amount of data by unit (halfword). You can also perform a program data
       operation of an amount of data using the function BSP_NOR_ProgramData().
     o The function BSP_NOR_Read_ID() returns the chip IDs stored in the structure 
       "NOR_IDTypeDef". (see the NOR IDs in the memory data sheet)
     o Perform erase block operation using the function BSP_NOR_Erase_Block() and by
       specifying the block address. You can perform an erase operation of the whole 
       chip by calling the function BSP_NOR_Erase_Chip(). 
     o After other operations, the function BSP_NOR_ReturnToReadMode() allows the NOR 
       flash to return to read mode to perform read operations on it. 
 
------------------------------------------------------------------------------*/

/* Includes ------------------------------------------------------------------*/
#include "stm3210e_eval_nor.h"

/** @addtogroup BSP
  * @{
  */

/** @addtogroup STM3210E_EVAL
  * @{
  */ 
  
/** @defgroup STM3210E_EVAL_NOR STM3210E EVAL NOR
  * @{
  */ 


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

/** @defgroup STM3210E_EVAL_NOR_Private_Variables STM3210E EVAL NOR Private Variables
  * @{
  */       
static NOR_HandleTypeDef norHandle;
static FSMC_NORSRAM_TimingTypeDef Timing;

/**
  * @}
  */ 

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

/** @defgroup STM3210E_EVAL_NOR_Private_Function_Prototypes STM3210E EVAL NOR Private Function Prototypes
  * @{
  */ 

static void NOR_MspInit(void);
 
/**
  * @}
  */ 

/* Private functions ---------------------------------------------------------*/
    
/** @defgroup STM3210E_EVAL_NOR_Exported_Functions STM3210E EVAL NOR Exported Functions
  * @{
  */ 

/**
  * @brief  Initializes the NOR device.
  * @retval NOR memory status
  */
uint8_t BSP_NOR_Init(void)
{ 
  norHandle.Instance  = FSMC_NORSRAM_DEVICE;
  norHandle.Extended  = FSMC_NORSRAM_EXTENDED_DEVICE;
  
  /* NOR device configuration */  
  Timing.AddressSetupTime      = 2;
  Timing.AddressHoldTime       = 1;
  Timing.DataSetupTime         = 5;
  Timing.BusTurnAroundDuration = 0;
  Timing.CLKDivision           = 2;
  Timing.DataLatency           = 2;
  Timing.AccessMode            = FSMC_ACCESS_MODE_B;
  
  norHandle.Init.NSBank             = FSMC_NORSRAM_BANK2;
  norHandle.Init.DataAddressMux     = FSMC_DATA_ADDRESS_MUX_DISABLE;
  norHandle.Init.MemoryType         = FSMC_MEMORY_TYPE_NOR;
  norHandle.Init.MemoryDataWidth    = NOR_MEMORY_WIDTH;
  norHandle.Init.BurstAccessMode    = NOR_BURSTACCESS;
  norHandle.Init.WaitSignalPolarity = FSMC_WAIT_SIGNAL_POLARITY_LOW;
  norHandle.Init.WrapMode           = FSMC_WRAP_MODE_DISABLE;
  norHandle.Init.WaitSignalActive   = FSMC_WAIT_TIMING_BEFORE_WS;
  norHandle.Init.WriteOperation     = FSMC_WRITE_OPERATION_ENABLE;
  norHandle.Init.WaitSignal         = FSMC_WAIT_SIGNAL_DISABLE;
  norHandle.Init.ExtendedMode       = FSMC_EXTENDED_MODE_DISABLE;
  norHandle.Init.AsynchronousWait   = FSMC_ASYNCHRONOUS_WAIT_DISABLE;
  norHandle.Init.WriteBurst         = NOR_WRITEBURST;
    
  /* NOR controller initialization */
  NOR_MspInit();
  
  if(HAL_NOR_Init(&norHandle, &Timing, &Timing) != HAL_OK)
  {
    return NOR_STATUS_ERROR;
  }
  else
  {
    return NOR_STATUS_OK;
  }
}

/**
  * @brief  Reads an amount of data from the NOR device.
  * @param  uwStartAddress: Read start address
  * @param  pData: Pointer to data to be read
  * @param  uwDataSize: Size of data to read    
  * @retval NOR memory status
  */
uint8_t BSP_NOR_ReadData(uint32_t uwStartAddress, uint16_t* pData, uint32_t uwDataSize)
{
  if(HAL_NOR_ReadBuffer(&norHandle, NOR_DEVICE_ADDR + uwStartAddress, pData, uwDataSize) != HAL_OK)
  {
    return NOR_STATUS_ERROR;
  }
  else
  {
    return NOR_STATUS_OK;
  }
}

/**
  * @brief  Returns the NOR memory to read mode.
  */
void BSP_NOR_ReturnToReadMode(void)
{
   HAL_NOR_ReturnToReadMode(&norHandle);
}

/**
  * @brief  Writes an amount of data to the NOR device.
  * @param  uwStartAddress: Write start address
  * @param  pData: Pointer to data to be written
  * @param  uwDataSize: Size of data to write    
  * @retval NOR memory status
  */
uint8_t BSP_NOR_WriteData(uint32_t uwStartAddress, uint16_t* pData, uint32_t uwDataSize)
{
  uint32_t index = uwDataSize;
  
  while(index > 0)
  {
    /* Write data to NOR */
    HAL_NOR_Program(&norHandle, (uint32_t *)(NOR_DEVICE_ADDR + uwStartAddress), pData);
    
    /* Read NOR device status */
    if(HAL_NOR_GetStatus(&norHandle, NOR_DEVICE_ADDR, PROGRAM_TIMEOUT) != HAL_NOR_STATUS_SUCCESS)
    {
      return NOR_STATUS_ERROR;
    }
    
    /* Update the counters */
    index--;
    uwStartAddress += 2;
    pData++; 
  }
  
  return NOR_STATUS_OK;
}

/**
  * @brief  Programs an amount of data to the NOR device.
  * @param  uwStartAddress: Write start address
  * @param  pData: Pointer to data to be written
  * @param  uwDataSize: Size of data to write    
  * @retval NOR memory status
  */
uint8_t BSP_NOR_ProgramData(uint32_t uwStartAddress, uint16_t* pData, uint32_t uwDataSize)
{
  /* Send NOR program buffer operation */
  HAL_NOR_ProgramBuffer(&norHandle, uwStartAddress, pData, uwDataSize);
  
  /* Return the NOR memory status */
  if(HAL_NOR_GetStatus(&norHandle, NOR_DEVICE_ADDR, PROGRAM_TIMEOUT) != HAL_NOR_STATUS_SUCCESS)
  {
    return NOR_STATUS_ERROR;
  }
  else
  {
    return NOR_STATUS_OK;
  }
}

/**
  * @brief  Erases the specified block of the NOR device. 
  * @param  BlockAddress: Block address to erase  
  * @retval NOR memory status
  */
uint8_t BSP_NOR_Erase_Block(uint32_t BlockAddress)
{
  /* Send NOR erase block operation */
  HAL_NOR_Erase_Block(&norHandle, BlockAddress, NOR_DEVICE_ADDR);
  
  /* Return the NOR memory status */  
  if(HAL_NOR_GetStatus(&norHandle, NOR_DEVICE_ADDR, BLOCKERASE_TIMEOUT) != HAL_NOR_STATUS_SUCCESS)
  {
    return NOR_STATUS_ERROR;
  }
  else
  {
    return NOR_STATUS_OK;
  }
}

/**
  * @brief  Erases the entire NOR chip.
  * @retval NOR memory status
  */
uint8_t BSP_NOR_Erase_Chip(void)
{
  /* Send NOR Erase chip operation */
  HAL_NOR_Erase_Chip(&norHandle, NOR_DEVICE_ADDR);
  
  /* Return the NOR memory status */
  if(HAL_NOR_GetStatus(&norHandle, NOR_DEVICE_ADDR, CHIPERASE_TIMEOUT) != HAL_NOR_STATUS_SUCCESS)
  {
    return NOR_STATUS_ERROR;
  }
  else
  {
    return NOR_STATUS_OK;
  } 
}

/**
  * @brief  Reads NOR flash IDs.
  * @param  pNOR_ID : Pointer to NOR ID structure
  * @retval NOR memory status
  */
uint8_t BSP_NOR_Read_ID(NOR_IDTypeDef *pNOR_ID)
{
  if(HAL_NOR_Read_ID(&norHandle, pNOR_ID) != HAL_OK)
  {
    return NOR_STATUS_ERROR;
  }
  else
  {
    return NOR_STATUS_OK;
  }
}

/**
  * @brief  Initializes the NOR MSP.
  */
static void NOR_MspInit(void)
{
  GPIO_InitTypeDef gpioinitstruct = {0};
  
  /* Enable FSMC clock */
  __HAL_RCC_FSMC_CLK_ENABLE();
  
  /* Enable GPIOs clock */
  __HAL_RCC_GPIOD_CLK_ENABLE();
  __HAL_RCC_GPIOE_CLK_ENABLE();
  __HAL_RCC_GPIOF_CLK_ENABLE();
  __HAL_RCC_GPIOG_CLK_ENABLE();
  
  /* Common GPIO configuration */
  gpioinitstruct.Mode      = GPIO_MODE_AF_PP;
  gpioinitstruct.Pull      = GPIO_PULLUP;
  gpioinitstruct.Speed     = GPIO_SPEED_FREQ_HIGH;
  
  /*-- GPIO Configuration ------------------------------------------------------*/
  /*!< NOR Data lines configuration */
  gpioinitstruct.Pin = GPIO_PIN_0 | GPIO_PIN_1 | GPIO_PIN_8 | GPIO_PIN_9 |
                                GPIO_PIN_10 | GPIO_PIN_14 | GPIO_PIN_15;
  HAL_GPIO_Init(GPIOD, &gpioinitstruct);

  gpioinitstruct.Pin = 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_Init(GPIOE, &gpioinitstruct);

  /*!< NOR Address lines configuration */
  gpioinitstruct.Pin = GPIO_PIN_0 | GPIO_PIN_1 | GPIO_PIN_2 | GPIO_PIN_3 |
                                GPIO_PIN_4 | GPIO_PIN_5 | GPIO_PIN_12 | GPIO_PIN_13 |
                                GPIO_PIN_14 | GPIO_PIN_15;
  HAL_GPIO_Init(GPIOF, &gpioinitstruct);

  gpioinitstruct.Pin = GPIO_PIN_0 | GPIO_PIN_1 | GPIO_PIN_2 |
                                GPIO_PIN_3 | GPIO_PIN_4 | GPIO_PIN_5;
  HAL_GPIO_Init(GPIOG, &gpioinitstruct);

  gpioinitstruct.Pin = GPIO_PIN_11 | GPIO_PIN_12 | GPIO_PIN_13;
  HAL_GPIO_Init(GPIOD, &gpioinitstruct);

  gpioinitstruct.Pin = GPIO_PIN_3 | GPIO_PIN_4 | GPIO_PIN_5 | GPIO_PIN_6;
  HAL_GPIO_Init(GPIOE, &gpioinitstruct);

  /*!< NOE and NWE configuration */
  gpioinitstruct.Pin = GPIO_PIN_4 | GPIO_PIN_5;
  HAL_GPIO_Init(GPIOD, &gpioinitstruct);

  /*!< NE2 configuration */
  gpioinitstruct.Pin = GPIO_PIN_9 | GPIO_PIN_12;
  HAL_GPIO_Init(GPIOG, &gpioinitstruct);

  /*!< Configure PD6 for NOR memory Ready/Busy signal */
  gpioinitstruct.Pin = GPIO_PIN_6;
  gpioinitstruct.Mode = GPIO_MODE_INPUT;
  HAL_GPIO_Init(GPIOD, &gpioinitstruct);
  
}

/**
  * @brief  NOR BSP Wait for Ready/Busy signal.
  * @param  hnor: Pointer to NOR handle
  * @param  Timeout: Timeout duration  
  */
void HAL_NOR_MspWait(NOR_HandleTypeDef *hnor, uint32_t Timeout)
{
  uint32_t timeout = Timeout;
  
  /* Polling on Ready/Busy signal */
  while((HAL_GPIO_ReadPin(NOR_READY_BUSY_GPIO, NOR_READY_BUSY_PIN) != NOR_BUSY_STATE) && (timeout > 0)) 
  {
    timeout--;
  }
  
  timeout = Timeout;
  
  /* Polling on Ready/Busy signal */
  while((HAL_GPIO_ReadPin(NOR_READY_BUSY_GPIO, NOR_READY_BUSY_PIN) != NOR_READY_STATE) && (timeout > 0)) 
  {
    timeout--;
  }  
}

/**
  * @}
  */  
  
/**
  * @}
  */ 
  
/**
  * @}
  */ 
  
/**
  * @}
  */