/**
  * @brief  Programs the SDRAM device.
  * @param  RefreshCount: SDRAM refresh counter value 
  * @retval None
  */
static void SDRAM_InitializationSequence(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);
	/* interrupt is not enable, just to delay some time. */
	for (tmpmrd = 0; tmpmrd < 0xfffff; tmpmrd ++)
		;

  /* 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); 
}
Пример #2
0
/**
  * @brief  Programs the SDRAM device.
  * @param  RefreshCount: SDRAM refresh counter value
  * @retval None
  */
static void BSP_SDRAM_Initialization_sequence(uint32_t RefreshCount,
        uint32_t CasLatency)
{
    __IO uint32_t tmpmrd = 0;
    FMC_SDRAM_CommandTypeDef Command;

    /* 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 */
    spin(1000);

    /* 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_OPERATING_MODE_STANDARD |\
             SDRAM_MODEREG_WRITEBURST_MODE_SINGLE;

    tmpmrd |= CasLatency;

    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);
}
Пример #3
0
static void sdram_init_seq(SDRAM_HandleTypeDef
        *hsdram, FMC_SDRAM_CommandTypeDef *command)
{
    /* Program the SDRAM external device */
    __IO uint32_t tmpmrd =0;

    /* Step 3:  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(hsdram, command, 0x1000);

    /* Step 4: Insert 100 ms delay */
    HAL_Delay(100);

    /* Step 5: 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(hsdram, command, 0x1000);

    /* Step 6 : Configure a Auto-Refresh command */
    command->CommandMode           = FMC_SDRAM_CMD_AUTOREFRESH_MODE;
    command->CommandTarget         = FMC_SDRAM_CMD_TARGET_BANK1;
    command->AutoRefreshNumber     = 4;
    command->ModeRegisterDefinition = 0;

    /* Send the command */
    HAL_SDRAM_SendCommand(hsdram, command, 0x1000);

    /* Step 7: Program the external memory mode register */
    tmpmrd = (uint32_t)SDRAM_MODEREG_BURST_LENGTH_2   |
        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(hsdram, command, 0x1000);

    /* Step 8: Set the refresh rate counter */
    /* (15.62 us x Freq) - 20 */
    /* Set the device refresh counter */
    HAL_SDRAM_ProgramRefreshRate(hsdram, REFRESH_COUNT);
}
Пример #4
0
Файл: main.c Проект: yym36100/g1
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_BANK2;
  Command.AutoRefreshNumber       = 1;
  Command.ModeRegisterDefinition  = 0;

  /* Send the command */
  HAL_SDRAM_SendCommand(&hsdram1, &Command, 0xFFFF);

  /* 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_BANK2;
  Command.AutoRefreshNumber       = 1;
  Command.ModeRegisterDefinition  = 0;

  /* Send the command */
  HAL_SDRAM_SendCommand(&hsdram1, &Command, 0xFFFF);  
  
  /* Step 4: Configure an Auto Refresh command */ 
  Command.CommandMode             = FMC_SDRAM_CMD_AUTOREFRESH_MODE;
  Command.CommandTarget           = FMC_SDRAM_CMD_TARGET_BANK2;
  Command.AutoRefreshNumber       = 4;
  Command.ModeRegisterDefinition  = 0;

  /* Send the command */
  HAL_SDRAM_SendCommand(&hsdram1, &Command, 0xFFFF);
  
  /* Step 5: Program the external memory mode register */
  tmpmrd = (uint32_t)0x0002          |
                     0   |
                     0x0030           |
                     0 |
                     0x0200;
  
  Command.CommandMode             = FMC_SDRAM_CMD_LOAD_MODE;
  Command.CommandTarget           = FMC_SDRAM_CMD_TARGET_BANK2;
  Command.AutoRefreshNumber       = 1;
  Command.ModeRegisterDefinition  = tmpmrd;

  /* Send the command */
  HAL_SDRAM_SendCommand(&hsdram1, &Command, 0xFFFF);
  
  /* Step 6: Set the refresh rate counter */
  /* Set the device refresh rate */
  HAL_SDRAM_ProgramRefreshRate(&hsdram1, RefreshCount); 
}
uint8_t TM_SDRAM_Init(void) {
    SDRAM_HandleTypeDef SDRAMHandle;
    FMC_SDRAM_TimingTypeDef Timing;
    FMC_SDRAM_CommandTypeDef Command;

    volatile uint32_t timeout = SDRAM_TIMEOUT;
    static uint8_t initialized = 0;

    /* Already initialized */
    if (initialized) {
        return 1;
    }

    /* Set instance */
    SDRAMHandle.Instance = FMC_SDRAM_DEVICE;

    /* Initialize FMC pins */
    TM_SDRAM_InitPins();

    /* Enable FMC clock */
    __HAL_RCC_FMC_CLK_ENABLE();

    /* FMC SDRAM device initialization sequence --------------------------------*/
    /* Step 1 ----------------------------------------------------*/
    /* Timing configuration for 90 Mhz of SD clock frequency (180Mhz/2) */
    /* TMRD: 2 Clock cycles */
    /* 1 clock cycle = 1 / 90MHz = 11.1ns */
    Timing.LoadToActiveDelay    = 2;
    Timing.ExitSelfRefreshDelay = 7;
    Timing.SelfRefreshTime      = 4;
    Timing.RowCycleDelay        = 7;
    Timing.WriteRecoveryTime    = 2;
    Timing.RPDelay              = 2;
    Timing.RCDDelay             = 2;


    /* FMC SDRAM control configuration */
    SDRAMHandle.Init.SDBank             = SDRAM_BANK;
    SDRAMHandle.Init.ColumnBitsNumber   = FMC_SDRAM_COLUMN_BITS_NUM_8;
    SDRAMHandle.Init.RowBitsNumber      = SDRAM_ROWBITS_NUMBER;
    SDRAMHandle.Init.MemoryDataWidth    = SDRAM_MEMORY_WIDTH;
    SDRAMHandle.Init.InternalBankNumber = FMC_SDRAM_INTERN_BANKS_NUM_4;
    SDRAMHandle.Init.CASLatency         = SDRAM_CAS_LATENCY;
    SDRAMHandle.Init.WriteProtection    = FMC_SDRAM_WRITE_PROTECTION_DISABLE;
    SDRAMHandle.Init.SDClockPeriod      = FMC_SDRAM_CLOCK_PERIOD_2;
    SDRAMHandle.Init.ReadBurst          = SDRAM_READ_BURST_STATE;
    SDRAMHandle.Init.ReadPipeDelay      = FMC_SDRAM_RPIPE_DELAY_0;

    /* FMC SDRAM bank initialization */
    HAL_SDRAM_Init(&SDRAMHandle, &Timing);

    /* SDRAM Init sequence */

    /* Configure a clock configuration enable command */
    Command.CommandMode				= FMC_SDRAM_CMD_CLK_ENABLE;
    Command.CommandTarget 			= SDRAM_COMMAND_TARGET_BANK;
    Command.AutoRefreshNumber 		= 1;
    Command.ModeRegisterDefinition 	= 0;

    /* Send command */
    HAL_SDRAM_SendCommand(&SDRAMHandle, &Command, SDRAM_TIMEOUT);

    /* Little delay */
    timeout = SDRAM_TIMEOUT * 0xF;
    while (timeout--);

    /* Configure a PALL (precharge all) command */
    Command.CommandMode          	= FMC_SDRAM_CMD_PALL;
    Command.CommandTarget          	= SDRAM_COMMAND_TARGET_BANK;
    Command.AutoRefreshNumber      	= 1;
    Command.ModeRegisterDefinition 	= 0;

    /* Send the command */
    HAL_SDRAM_SendCommand(&SDRAMHandle, &Command, SDRAM_TIMEOUT);

    /* Configure a Auto-Refresh command */
    Command.CommandMode            	= FMC_SDRAM_CMD_AUTOREFRESH_MODE;
    Command.CommandTarget          	= SDRAM_COMMAND_TARGET_BANK;
    Command.AutoRefreshNumber      	= 8;
    Command.ModeRegisterDefinition 	= 0;

    /* Send the command */
    HAL_SDRAM_SendCommand(&SDRAMHandle, &Command, SDRAM_TIMEOUT);

    /* Configure a load Mode register command */
    Command.CommandMode            	= FMC_SDRAM_CMD_LOAD_MODE;
    Command.CommandTarget          	= SDRAM_COMMAND_TARGET_BANK;
    Command.AutoRefreshNumber      	= 1;
    Command.ModeRegisterDefinition 	= (uint32_t)SDRAM_REG_VALUE;

    /* Wait until the SDRAM controller is ready */
    /* 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, SDRAM_REFRESH_COUNT);

    /* Little delay */
    timeout = SDRAM_TIMEOUT * 0xF;
    while (timeout--);

    /* Check if everything goes right */
    /* Write 0x45 at location 0x50 and check if result is the same on read operation */
    TM_SDRAM_Write8(0x50, 0x45);

    /* Read and check */
    if (TM_SDRAM_Read8(0x50) == 0x45) {
        /* Initialized OK */
        initialized = 1;
        /* Initialized OK */
        return 1;
    }

    /* Not initialized OK */
    initialized = 0;

    /* Not ok */
    return 0;
}