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/**
******************************************************************************
* @file stm324x9i_eval_sdram.c
* @author MCD Application Team
* @brief This file includes the SDRAM driver for the MT48LC4M32B2B5-7 memory
* device mounted on STM324x9I-EVAL evaluation board.
******************************************************************************
* @attention
*
* Copyright (c) 2017 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 MT48LC4M32B2B5-7 SDRAM external memory mounted
on STM324x9I-EVAL evaluation 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
BSP_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.
------------------------------------------------------------------------------*/
/* Includes ------------------------------------------------------------------*/
#include "stm324x9i_eval_sdram.h"
/** @addtogroup BSP
* @{
*/
/** @addtogroup STM324x9I_EVAL
* @{
*/
/** @defgroup STM324x9I_EVAL_SDRAM STM324x9I EVAL SDRAM
* @{
*/
/** @defgroup STM324x9I_EVAL_SDRAM_Private_Variables STM324x9I EVAL SDRAM Private Variables
* @{
*/
static SDRAM_HandleTypeDef sdramHandle;
static FMC_SDRAM_TimingTypeDef Timing;
static FMC_SDRAM_CommandTypeDef Command;
/**
* @}
*/
/** @defgroup STM324x9I_EVAL_SDRAM_Private_Functions STM324x9I EVAL SDRAM Private 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 90Mhz as SD clock frequency (System clock is up to 180Mhz */
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_9;
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_3;
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();
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 Programs the SDRAM device.
* @param RefreshCount: SDRAM refresh counter value
*/
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);
/* 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_3 |\
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 mount 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 mount 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 mount 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 mount 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 HAL 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.
*/
void BSP_SDRAM_DMA_IRQHandler(void)
{
HAL_DMA_IRQHandler(sdramHandle.hdma);
}
/**
* @brief Initializes SDRAM MSP.
*/
__weak void BSP_SDRAM_MspInit(void)
{
static DMA_HandleTypeDef dmaHandle;
GPIO_InitTypeDef GPIO_Init_Structure;
SDRAM_HandleTypeDef *hsdram = &sdramHandle;
/* Enable FMC clock */
__HAL_RCC_FMC_CLK_ENABLE();
/* Enable chosen DMAx clock */
__DMAx_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();
__HAL_RCC_GPIOH_CLK_ENABLE();
__HAL_RCC_GPIOI_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;
/* GPIOD configuration */
GPIO_Init_Structure.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, &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_2 | GPIO_PIN_3 | GPIO_PIN_5 | 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(GPIOH, &GPIO_Init_Structure);
/* GPIOI 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_6 | GPIO_PIN_7 | GPIO_PIN_9 | GPIO_PIN_10;
HAL_GPIO_Init(GPIOI, &GPIO_Init_Structure);
/* Configure common DMA parameters */
dmaHandle.Init.Channel = SDRAM_DMAx_CHANNEL;
dmaHandle.Init.Direction = DMA_MEMORY_TO_MEMORY;
dmaHandle.Init.PeriphInc = DMA_PINC_ENABLE;
dmaHandle.Init.MemInc = DMA_MINC_ENABLE;
dmaHandle.Init.PeriphDataAlignment = DMA_PDATAALIGN_WORD;
dmaHandle.Init.MemDataAlignment = DMA_MDATAALIGN_WORD;
dmaHandle.Init.Mode = DMA_NORMAL;
dmaHandle.Init.Priority = DMA_PRIORITY_HIGH;
dmaHandle.Init.FIFOMode = DMA_FIFOMODE_DISABLE;
dmaHandle.Init.FIFOThreshold = DMA_FIFO_THRESHOLD_FULL;
dmaHandle.Init.MemBurst = DMA_MBURST_SINGLE;
dmaHandle.Init.PeriphBurst = DMA_PBURST_SINGLE;
dmaHandle.Instance = SDRAM_DMAx_STREAM;
/* Associate the DMA handle */
__HAL_LINKDMA(hsdram, hdma, dmaHandle);
/* Deinitialize the stream for new transfer */
HAL_DMA_DeInit(&dmaHandle);
/* Configure the DMA stream */
HAL_DMA_Init(&dmaHandle);
/* NVIC configuration for DMA transfer complete interrupt */
HAL_NVIC_SetPriority(SDRAM_DMAx_IRQn, 0x0F, 0);
HAL_NVIC_EnableIRQ(SDRAM_DMAx_IRQn);
}
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/