C++ (Cpp) BSP_SDRAM_MspInit Examples

Example #1

File: stm32746g_discovery_sdram.c Project: roceh/stm32f7disco_llilum_lcdtest

/**
  * @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;

  // um is my disco board faulty - this is defined a _1 by ST by i have lots of sdram read problems with my board
  sdramHandle.Init.ReadPipeDelay      = FMC_SDRAM_RPIPE_DELAY_2; 
  
  /* SDRAM controller initialization */

  BSP_SDRAM_MspInit(&sdramHandle, 0); /* __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;
}

Example #2

File: stm32469i_eval_sdram.c Project: Joe-Merten/Stm32-Tools-Evaluation

/**
  * @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 90 MHz as SD clock frequency (System clock is up to 180 MHz) */
  Timing.LoadToActiveDelay    = 2;   /* TMRD: 2 Clock cycles */
  Timing.ExitSelfRefreshDelay = 7;   /* TXSR: min=70ns (7x11.11ns) */
  Timing.SelfRefreshTime      = 4;   /* TRAS: min=42ns (4x11.11ns) max=120k (ns) */
  Timing.RowCycleDelay        = 7;   /* TRC:  min=70 (7x11.11ns) */
  Timing.WriteRecoveryTime    = 2;   /* TWR:  min=1+ 7ns (1+1x11.11ns) */
  Timing.RPDelay              = 2;   /* TRP:  20ns => 2x11.11ns */
  Timing.RCDDelay             = 2;   /* TRCD: 20ns => 2x11.11ns */

  sdramHandle.Init.SDBank             = FMC_SDRAM_BANK1;
  sdramHandle.Init.ColumnBitsNumber   = FMC_SDRAM_COLUMN_BITS_NUM_8;
  sdramHandle.Init.RowBitsNumber      = FMC_SDRAM_ROW_BITS_NUM_11;
  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 */
  /* __weak function can be surcharged by the application code */
  BSP_SDRAM_MspInit(&sdramHandle, (void *)NULL);
  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;
}

Example #3

File: stm32f746g_discovery_sdram.c Project: kerneltask/ugfx

/**
  * @brief  Initializes the SDRAM device.
  * @retval SDRAM status
  */
void BSP_SDRAM_Init(void)
{ 
  SDRAM_HandleTypeDef sdramHandle;
  FMC_SDRAM_TimingTypeDef Timing;

  /* 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);

  _HAL_SDRAM_Init(&sdramHandle, &Timing);
  
  /* SDRAM initialization sequence */
  BSP_SDRAM_Initialization_sequence(&sdramHandle, REFRESH_COUNT);
}