Diff: stm32746g_discovery_sdram.c

Revision:

0:c9112f0c67e3

diff -r 000000000000 -r c9112f0c67e3 stm32746g_discovery_sdram.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/stm32746g_discovery_sdram.c	Mon Sep 28 13:34:16 2015 +0000
@@ -0,0 +1,503 @@
+/**
+  ******************************************************************************
+  * @file    stm32746g_discovery_sdram.c
+  * @author  MCD Application Team
+  * @version V1.0.0
+  * @date    25-June-2015
+  * @brief   This file includes the SDRAM driver for the MT48LC4M32B2B5-7 memory 
+  *          device mounted on STM32746G-Discovery board.
+  @verbatim
+   1. How To use this driver:
+   --------------------------
+      - This driver is used to drive the MT48LC4M32B2B5-7 SDRAM external memory mounted
+        on STM32746G-Discovery board.
+      - This driver does not need a specific component driver for the SDRAM device
+        to be included with.
+   
+   2. Driver description:
+   ---------------------
+     + Initialization steps:
+        o Initialize the SDRAM external memory using the BSP_SDRAM_Init() function. This 
+          function includes the MSP layer hardware resources initialization and the
+          FMC controller configuration to interface with the external SDRAM memory.
+        o It contains the SDRAM initialization sequence to program the SDRAM external 
+          device using the function BSP_SDRAM_Initialization_sequence(). Note that this 
+          sequence is standard for all SDRAM devices, but can include some differences
+          from a device to another. If it is the case, the right sequence should be 
+          implemented separately.
+     
+     + SDRAM read/write operations
+        o SDRAM 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_SDRAM_ReadData()/BSP_SDRAM_WriteData(), or by DMA transfer using the functions
+          BSP_SDRAM_ReadData_DMA()/BSP_SDRAM_WriteData_DMA().
+        o The AHB access is performed with 32-bit width transaction, the DMA transfer
+          configuration is fixed at single (no burst) word transfer (see the 
+          SDRAM_MspInit() static function).
+        o User can implement his own functions for read/write access with his desired 
+          configurations.
+        o If interrupt mode is used for DMA transfer, the function BSP_SDRAM_DMA_IRQHandler()
+          is called in IRQ handler file, to serve the generated interrupt once the DMA 
+          transfer is complete.
+        o You can send a command to the SDRAM device in runtime using the function 
+          BSP_SDRAM_Sendcmd(), and giving the desired command as parameter chosen between 
+          the predefined commands of the "FMC_SDRAM_CommandTypeDef" structure. 
+ 
+  @endverbatim
+  ******************************************************************************
+  * @attention
+  *
+  * <h2><center>&copy; COPYRIGHT(c) 2015 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_sdram.h"
+
+// mbed function to replace HAL_Delay function
+void wait_ms(int ms);
+
+/** @addtogroup BSP
+  * @{
+  */
+
+/** @addtogroup STM32746G_DISCOVERY
+  * @{
+  */ 
+  
+/** @defgroup STM32746G_DISCOVERY_SDRAM STM32746G_DISCOVERY_SDRAM
+  * @{
+  */ 
+
+/** @defgroup STM32746G_DISCOVERY_SDRAM_Private_Types_Definitions STM32746G_DISCOVERY_SDRAM Private Types Definitions
+  * @{
+  */ 
+/**
+  * @}
+  */
+
+/** @defgroup STM32746G_DISCOVERY_SDRAM_Private_Defines STM32746G_DISCOVERY_SDRAM Private Defines
+  * @{
+  */
+/**
+  * @}
+  */
+
+/** @defgroup STM32746G_DISCOVERY_SDRAM_Private_Macros STM32746G_DISCOVERY_SDRAM Private Macros
+  * @{
+  */  
+/**
+  * @}
+  */
+
+/** @defgroup STM32746G_DISCOVERY_SDRAM_Private_Variables STM32746G_DISCOVERY_SDRAM Private Variables
+  * @{
+  */       
+static SDRAM_HandleTypeDef sdramHandle;
+static FMC_SDRAM_TimingTypeDef Timing;
+static FMC_SDRAM_CommandTypeDef Command;
+/**
+  * @}
+  */ 
+
+/** @defgroup STM32746G_DISCOVERY_SDRAM_Private_Function_Prototypes STM32746G_DISCOVERY_SDRAM Private Function Prototypes
+  * @{
+  */ 
+/**
+  * @}
+  */
+    
+/** @defgroup STM32746G_DISCOVERY_SDRAM_Exported_Functions STM32746G_DISCOVERY_SDRAM Exported Functions
+  * @{
+  */ 
+
+/**
+  * @brief  Initializes the SDRAM device.
+  * @retval SDRAM status
+  */
+uint8_t BSP_SDRAM_Init(void)
+{ 
+  static uint8_t sdramstatus = SDRAM_ERROR;
+  /* SDRAM device configuration */
+  sdramHandle.Instance = FMC_SDRAM_DEVICE;
+    
+  /* Timing configuration for 100Mhz as SD clock frequency (System clock is up to 200Mhz) */
+  Timing.LoadToActiveDelay    = 2;
+  Timing.ExitSelfRefreshDelay = 7;
+  Timing.SelfRefreshTime      = 4;
+  Timing.RowCycleDelay        = 7;
+  Timing.WriteRecoveryTime    = 2;
+  Timing.RPDelay              = 2;
+  Timing.RCDDelay             = 2;
+  
+  sdramHandle.Init.SDBank             = FMC_SDRAM_BANK1;
+  sdramHandle.Init.ColumnBitsNumber   = FMC_SDRAM_COLUMN_BITS_NUM_8;
+  sdramHandle.Init.RowBitsNumber      = FMC_SDRAM_ROW_BITS_NUM_12;
+  sdramHandle.Init.MemoryDataWidth    = SDRAM_MEMORY_WIDTH;
+  sdramHandle.Init.InternalBankNumber = FMC_SDRAM_INTERN_BANKS_NUM_4;
+  sdramHandle.Init.CASLatency         = FMC_SDRAM_CAS_LATENCY_2;
+  sdramHandle.Init.WriteProtection    = FMC_SDRAM_WRITE_PROTECTION_DISABLE;
+  sdramHandle.Init.SDClockPeriod      = SDCLOCK_PERIOD;
+  sdramHandle.Init.ReadBurst          = FMC_SDRAM_RBURST_ENABLE;
+  sdramHandle.Init.ReadPipeDelay      = FMC_SDRAM_RPIPE_DELAY_0;
+  
+  /* SDRAM controller initialization */
+
+  BSP_SDRAM_MspInit(&sdramHandle, NULL); /* __weak function can be rewritten by the application */
+
+  if(HAL_SDRAM_Init(&sdramHandle, &Timing) != HAL_OK)
+  {
+    sdramstatus = SDRAM_ERROR;
+  }
+  else
+  {
+    sdramstatus = SDRAM_OK;
+  }
+  
+  /* SDRAM initialization sequence */
+  BSP_SDRAM_Initialization_sequence(REFRESH_COUNT);
+  
+  return sdramstatus;
+}
+
+/**
+  * @brief  DeInitializes the SDRAM device.
+  * @retval SDRAM status
+  */
+uint8_t BSP_SDRAM_DeInit(void)
+{ 
+  static uint8_t sdramstatus = SDRAM_ERROR;
+  /* SDRAM device de-initialization */
+  sdramHandle.Instance = FMC_SDRAM_DEVICE;
+
+  if(HAL_SDRAM_DeInit(&sdramHandle) != HAL_OK)
+  {
+    sdramstatus = SDRAM_ERROR;
+  }
+  else
+  {
+    sdramstatus = SDRAM_OK;
+  }
+  
+  /* SDRAM controller de-initialization */
+  BSP_SDRAM_MspDeInit(&sdramHandle, NULL);
+  
+  return sdramstatus;
+}
+
+/**
+  * @brief  Programs the SDRAM device.
+  * @param  RefreshCount: SDRAM refresh counter value 
+  * @retval None
+  */
+void BSP_SDRAM_Initialization_sequence(uint32_t RefreshCount)
+{
+  __IO uint32_t tmpmrd = 0;
+  
+  /* Step 1: Configure a clock configuration enable command */
+  Command.CommandMode            = FMC_SDRAM_CMD_CLK_ENABLE;
+  Command.CommandTarget          = FMC_SDRAM_CMD_TARGET_BANK1;
+  Command.AutoRefreshNumber      = 1;
+  Command.ModeRegisterDefinition = 0;
+
+  /* Send the command */
+  HAL_SDRAM_SendCommand(&sdramHandle, &Command, SDRAM_TIMEOUT);
+
+  /* Step 2: Insert 100 us minimum delay */ 
+  /* Inserted delay is equal to 1 ms due to systick time base unit (ms) */
+  //HAL_Delay(1);
+  wait_ms(1);
+    
+  /* Step 3: Configure a PALL (precharge all) command */ 
+  Command.CommandMode            = FMC_SDRAM_CMD_PALL;
+  Command.CommandTarget          = FMC_SDRAM_CMD_TARGET_BANK1;
+  Command.AutoRefreshNumber      = 1;
+  Command.ModeRegisterDefinition = 0;
+
+  /* Send the command */
+  HAL_SDRAM_SendCommand(&sdramHandle, &Command, SDRAM_TIMEOUT);  
+  
+  /* Step 4: Configure an Auto Refresh command */ 
+  Command.CommandMode            = FMC_SDRAM_CMD_AUTOREFRESH_MODE;
+  Command.CommandTarget          = FMC_SDRAM_CMD_TARGET_BANK1;
+  Command.AutoRefreshNumber      = 8;
+  Command.ModeRegisterDefinition = 0;
+
+  /* Send the command */
+  HAL_SDRAM_SendCommand(&sdramHandle, &Command, SDRAM_TIMEOUT);
+  
+  /* Step 5: Program the external memory mode register */
+  tmpmrd = (uint32_t)SDRAM_MODEREG_BURST_LENGTH_1          |\
+                     SDRAM_MODEREG_BURST_TYPE_SEQUENTIAL   |\
+                     SDRAM_MODEREG_CAS_LATENCY_2           |\
+                     SDRAM_MODEREG_OPERATING_MODE_STANDARD |\
+                     SDRAM_MODEREG_WRITEBURST_MODE_SINGLE;
+  
+  Command.CommandMode            = FMC_SDRAM_CMD_LOAD_MODE;
+  Command.CommandTarget          = FMC_SDRAM_CMD_TARGET_BANK1;
+  Command.AutoRefreshNumber      = 1;
+  Command.ModeRegisterDefinition = tmpmrd;
+
+  /* Send the command */
+  HAL_SDRAM_SendCommand(&sdramHandle, &Command, SDRAM_TIMEOUT);
+  
+  /* Step 6: Set the refresh rate counter */
+  /* Set the device refresh rate */
+  HAL_SDRAM_ProgramRefreshRate(&sdramHandle, RefreshCount); 
+}
+
+/**
+  * @brief  Reads an amount of data from the SDRAM memory in polling mode.
+  * @param  uwStartAddress: Read start address
+  * @param  pData: Pointer to data to be read  
+  * @param  uwDataSize: Size of read data from the memory
+  * @retval SDRAM status
+  */
+uint8_t BSP_SDRAM_ReadData(uint32_t uwStartAddress, uint32_t *pData, uint32_t uwDataSize)
+{
+  if(HAL_SDRAM_Read_32b(&sdramHandle, (uint32_t *)uwStartAddress, pData, uwDataSize) != HAL_OK)
+  {
+    return SDRAM_ERROR;
+  }
+  else
+  {
+    return SDRAM_OK;
+  } 
+}
+
+/**
+  * @brief  Reads an amount of data from the SDRAM memory in DMA mode.
+  * @param  uwStartAddress: Read start address
+  * @param  pData: Pointer to data to be read  
+  * @param  uwDataSize: Size of read data from the memory
+  * @retval SDRAM status
+  */
+uint8_t BSP_SDRAM_ReadData_DMA(uint32_t uwStartAddress, uint32_t *pData, uint32_t uwDataSize)
+{
+  if(HAL_SDRAM_Read_DMA(&sdramHandle, (uint32_t *)uwStartAddress, pData, uwDataSize) != HAL_OK)
+  {
+    return SDRAM_ERROR;
+  }
+  else
+  {
+    return SDRAM_OK;
+  }     
+}
+
+/**
+  * @brief  Writes an amount of data to the SDRAM memory in polling mode.
+  * @param  uwStartAddress: Write start address
+  * @param  pData: Pointer to data to be written  
+  * @param  uwDataSize: Size of written data from the memory
+  * @retval SDRAM status
+  */
+uint8_t BSP_SDRAM_WriteData(uint32_t uwStartAddress, uint32_t *pData, uint32_t uwDataSize) 
+{
+  if(HAL_SDRAM_Write_32b(&sdramHandle, (uint32_t *)uwStartAddress, pData, uwDataSize) != HAL_OK)
+  {
+    return SDRAM_ERROR;
+  }
+  else
+  {
+    return SDRAM_OK;
+  }
+}
+
+/**
+  * @brief  Writes an amount of data to the SDRAM memory in DMA mode.
+  * @param  uwStartAddress: Write start address
+  * @param  pData: Pointer to data to be written  
+  * @param  uwDataSize: Size of written data from the memory
+  * @retval SDRAM status
+  */
+uint8_t BSP_SDRAM_WriteData_DMA(uint32_t uwStartAddress, uint32_t *pData, uint32_t uwDataSize) 
+{
+  if(HAL_SDRAM_Write_DMA(&sdramHandle, (uint32_t *)uwStartAddress, pData, uwDataSize) != HAL_OK)
+  {
+    return SDRAM_ERROR;
+  }
+  else
+  {
+    return SDRAM_OK;
+  } 
+}
+
+/**
+  * @brief  Sends command to the SDRAM bank.
+  * @param  SdramCmd: Pointer to SDRAM command structure 
+  * @retval SDRAM status
+  */  
+uint8_t BSP_SDRAM_Sendcmd(FMC_SDRAM_CommandTypeDef *SdramCmd)
+{
+  if(HAL_SDRAM_SendCommand(&sdramHandle, SdramCmd, SDRAM_TIMEOUT) != HAL_OK)
+  {
+    return SDRAM_ERROR;
+  }
+  else
+  {
+    return SDRAM_OK;
+  }
+}
+
+/**
+  * @brief  Handles SDRAM DMA transfer interrupt request.
+  * @retval None
+  */
+void BSP_SDRAM_DMA_IRQHandler(void)
+{
+  HAL_DMA_IRQHandler(sdramHandle.hdma); 
+}
+
+/**
+  * @brief  Initializes SDRAM MSP.
+  * @param  hsdram: SDRAM handle
+  * @param  Params
+  * @retval None
+  */
+__weak void BSP_SDRAM_MspInit(SDRAM_HandleTypeDef  *hsdram, void *Params)
+{  
+  static DMA_HandleTypeDef dma_handle;
+  GPIO_InitTypeDef gpio_init_structure;
+  
+  /* Enable FMC clock */
+  __HAL_RCC_FMC_CLK_ENABLE();
+  
+  /* Enable chosen DMAx clock */
+  __DMAx_CLK_ENABLE();
+
+  /* Enable GPIOs clock */
+  __HAL_RCC_GPIOC_CLK_ENABLE();
+  __HAL_RCC_GPIOD_CLK_ENABLE();
+  __HAL_RCC_GPIOE_CLK_ENABLE();
+  __HAL_RCC_GPIOF_CLK_ENABLE();
+  __HAL_RCC_GPIOG_CLK_ENABLE();
+  __HAL_RCC_GPIOH_CLK_ENABLE();
+  
+  /* Common GPIO configuration */
+  gpio_init_structure.Mode      = GPIO_MODE_AF_PP;
+  gpio_init_structure.Pull      = GPIO_PULLUP;
+  gpio_init_structure.Speed     = GPIO_SPEED_FAST;
+  gpio_init_structure.Alternate = GPIO_AF12_FMC;
+  
+  /* GPIOC configuration */
+  gpio_init_structure.Pin   = GPIO_PIN_3;
+  HAL_GPIO_Init(GPIOC, &gpio_init_structure);
+
+  /* GPIOD configuration */
+  gpio_init_structure.Pin   = GPIO_PIN_0 | GPIO_PIN_1 | GPIO_PIN_3 | GPIO_PIN_8 | GPIO_PIN_9 |
+                              GPIO_PIN_10 | GPIO_PIN_14 | GPIO_PIN_15;
+  HAL_GPIO_Init(GPIOD, &gpio_init_structure);
+
+  /* GPIOE configuration */  
+  gpio_init_structure.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;
+  HAL_GPIO_Init(GPIOE, &gpio_init_structure);
+  
+  /* GPIOF configuration */  
+  gpio_init_structure.Pin   = GPIO_PIN_0 | GPIO_PIN_1 | GPIO_PIN_2| GPIO_PIN_3 | GPIO_PIN_4 |\
+                              GPIO_PIN_5 | GPIO_PIN_11 | GPIO_PIN_12 | GPIO_PIN_13 | GPIO_PIN_14 |\
+                              GPIO_PIN_15;
+  HAL_GPIO_Init(GPIOF, &gpio_init_structure);
+  
+  /* GPIOG configuration */  
+  gpio_init_structure.Pin   = GPIO_PIN_0 | GPIO_PIN_1 | GPIO_PIN_4| GPIO_PIN_5 | GPIO_PIN_8 |\
+                              GPIO_PIN_15;
+  HAL_GPIO_Init(GPIOG, &gpio_init_structure);
+
+  /* GPIOH configuration */  
+  gpio_init_structure.Pin   = GPIO_PIN_3 | GPIO_PIN_5;
+  HAL_GPIO_Init(GPIOH, &gpio_init_structure); 
+  
+  /* Configure common DMA parameters */
+  dma_handle.Init.Channel             = SDRAM_DMAx_CHANNEL;
+  dma_handle.Init.Direction           = DMA_MEMORY_TO_MEMORY;
+  dma_handle.Init.PeriphInc           = DMA_PINC_ENABLE;
+  dma_handle.Init.MemInc              = DMA_MINC_ENABLE;
+  dma_handle.Init.PeriphDataAlignment = DMA_PDATAALIGN_WORD;
+  dma_handle.Init.MemDataAlignment    = DMA_MDATAALIGN_WORD;
+  dma_handle.Init.Mode                = DMA_NORMAL;
+  dma_handle.Init.Priority            = DMA_PRIORITY_HIGH;
+  dma_handle.Init.FIFOMode            = DMA_FIFOMODE_DISABLE;         
+  dma_handle.Init.FIFOThreshold       = DMA_FIFO_THRESHOLD_FULL;
+  dma_handle.Init.MemBurst            = DMA_MBURST_SINGLE;
+  dma_handle.Init.PeriphBurst         = DMA_PBURST_SINGLE; 
+  
+  dma_handle.Instance = SDRAM_DMAx_STREAM;
+  
+   /* Associate the DMA handle */
+  __HAL_LINKDMA(hsdram, hdma, dma_handle);
+  
+  /* Deinitialize the stream for new transfer */
+  HAL_DMA_DeInit(&dma_handle);
+  
+  /* Configure the DMA stream */
+  HAL_DMA_Init(&dma_handle); 
+  
+  /* NVIC configuration for DMA transfer complete interrupt */
+  HAL_NVIC_SetPriority(SDRAM_DMAx_IRQn, 5, 0);
+  HAL_NVIC_EnableIRQ(SDRAM_DMAx_IRQn);
+}
+
+/**
+  * @brief  DeInitializes SDRAM MSP.
+  * @param  hsdram: SDRAM handle
+  * @param  Params
+  * @retval None
+  */
+__weak void BSP_SDRAM_MspDeInit(SDRAM_HandleTypeDef  *hsdram, void *Params)
+{  
+    static DMA_HandleTypeDef dma_handle;
+  
+    /* Disable NVIC configuration for DMA interrupt */
+    HAL_NVIC_DisableIRQ(SDRAM_DMAx_IRQn);
+
+    /* Deinitialize the stream for new transfer */
+    dma_handle.Instance = SDRAM_DMAx_STREAM;
+    HAL_DMA_DeInit(&dma_handle);
+
+    /* GPIO pins clock, FMC clock and DMA clock can be shut down in the applications
+       by surcharging this __weak function */ 
+}
+
+/**
+  * @}
+  */  
+  
+/**
+  * @}
+  */ 
+  
+/**
+  * @}
+  */ 
+  
+/**
+  * @}
+  */ 
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/