rt-thread/bsp/stm32f429-disco/drivers/drv_sdram.c

/*
 * Copyright (c) 2006-2018, RT-Thread Development Team
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 * Change Logs:
 * Date           Author       Notes
 * 2016-08-20     xuzhuoyi     The first version for STM32F42x
 */

/* Includes ------------------------------------------------------------------*/
#include "drv_sdram.h"
#include "stm32f4xx_ll_fmc.h"
#include <rtdevice.h>
#include "board.h"

SDRAM_HandleTypeDef hsdram1;
FMC_SDRAM_CommandTypeDef command;

/**
  * @brief SDRAM MSP Initialization
  *        This function configures the hardware resources used in this example:
  *           - Peripheral's clock enable
  *           - Peripheral's GPIO Configuration
  * @param hsdram: SDRAM handle pointer
  * @retval None
  */
void HAL_SDRAM_MspInit(SDRAM_HandleTypeDef *hsdram)
{
  GPIO_InitTypeDef  GPIO_Init_Structure;

  /*##-1- Enable peripherals and GPIO Clocks #################################*/
  /* Enable GPIO clocks */
  __HAL_RCC_GPIOB_CLK_ENABLE();
  __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();
  /* Enable FMC clock */
  __HAL_RCC_FMC_CLK_ENABLE();

  /*##-2- Configure peripheral GPIO ##########################################*/
/*-- GPIOs Configuration -----------------------------------------------------*/
/*
 +-------------------+--------------------+--------------------+--------------------+
 +                       SDRAM pins assignment                                      +
 +-------------------+--------------------+--------------------+--------------------+
 | PD0  <-> FMC_D2   | PE0  <-> FMC_NBL0  | PF0  <-> FMC_A0    | PG0  <-> FMC_A10   |
 | PD1  <-> FMC_D3   | PE1  <-> FMC_NBL1  | PF1  <-> FMC_A1    | PG1  <-> FMC_A11   |
 | PD8  <-> FMC_D13  | PE7  <-> FMC_D4    | PF2  <-> FMC_A2    | PG8  <-> FMC_SDCLK |
 | PD9  <-> FMC_D14  | PE8  <-> FMC_D5    | PF3  <-> FMC_A3    | PG15 <-> FMC_NCAS  |
 | PD10 <-> FMC_D15  | PE9  <-> FMC_D6    | PF4  <-> FMC_A4    |--------------------+
 | PD14 <-> FMC_D0   | PE10 <-> FMC_D7    | PF5  <-> FMC_A5    |
 | PD15 <-> FMC_D1   | PE11 <-> FMC_D8    | PF11 <-> FMC_NRAS  |
 +-------------------| PE12 <-> FMC_D9    | PF12 <-> FMC_A6    |
                     | PE13 <-> FMC_D10   | PF13 <-> FMC_A7    |
                     | PE14 <-> FMC_D11   | PF14 <-> FMC_A8    |
                     | PE15 <-> FMC_D12   | PF15 <-> FMC_A9    |
 +-------------------+--------------------+--------------------+
 | PB5 <-> FMC_SDCKE1|
 | PB6 <-> FMC_SDNE1 |
 | PC0 <-> FMC_SDNWE |
 +-------------------+

*/

  /* Common GPIO configuration */
  GPIO_Init_Structure.Mode  = GPIO_MODE_AF_PP;
  GPIO_Init_Structure.Speed = GPIO_SPEED_FAST;
  GPIO_Init_Structure.Pull  = GPIO_NOPULL;
  GPIO_Init_Structure.Alternate = GPIO_AF12_FMC;

  /* GPIOB configuration */
  GPIO_Init_Structure.Pin = GPIO_PIN_5 | GPIO_PIN_6;
  HAL_GPIO_Init(GPIOB, &GPIO_Init_Structure);

  /* GPIOC configuration */
  GPIO_Init_Structure.Pin = GPIO_PIN_0;
  HAL_GPIO_Init(GPIOC, &GPIO_Init_Structure);

  /* 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);
}

/**
  * @brief SDRAM MSP De-Initialization
  *        This function frees the hardware resources used in this example:
  *          - Disable the Peripheral's clock
  *          - Revert GPIO configuration to their default state
  * @param hsdram: SDRAM handle pointer
  * @retval None
  */
void HAL_SDRAM_MspDeInit(SDRAM_HandleTypeDef *hsdram)
{
  /*## Disable peripherals and GPIO Clocks ###################################*/
  HAL_GPIO_DeInit(GPIOB, GPIO_PIN_5 | GPIO_PIN_6);

  HAL_GPIO_DeInit(GPIOC, GPIO_PIN_0);

  HAL_GPIO_DeInit(GPIOD, GPIO_PIN_0 | GPIO_PIN_1  | GPIO_PIN_8 |\
                         GPIO_PIN_9 | GPIO_PIN_10 | GPIO_PIN_14 |\
                         GPIO_PIN_15);

  HAL_GPIO_DeInit(GPIOE, 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_DeInit(GPIOF, 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_DeInit(GPIOG, GPIO_PIN_0 | GPIO_PIN_1 | GPIO_PIN_4 |\
                         GPIO_PIN_5 | GPIO_PIN_8 | GPIO_PIN_15);
}

/**
  * @brief  Perform the SDRAM exernal memory inialization sequence
  * @param  hsdram: SDRAM handle
  * @param  Command: Pointer to SDRAM command structure
  * @retval None
  */
static void SDRAM_Initialization_Sequence(SDRAM_HandleTypeDef *hsdram, FMC_SDRAM_CommandTypeDef *Command)
{
  __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_BANK2;
  Command->AutoRefreshNumber 	 = 1;
  Command->ModeRegisterDefinition = 0;

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

  /* Step 4: Insert 100 ms delay */
  /* interrupt is not enable, just to delay some time. */
	for (tmpmrd = 0; tmpmrd < 0xfffff; tmpmrd ++)
		;

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

  /* Step 6 : Configure a 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(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_BANK2;
  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);
}

/**
  * @brief  Configures the FMC and GPIOs to interface with the SDRAM memory.
  *         This function must be called before any read/write operation
  *         on the SDRAM.
  * @param  None
  * @retval None
  */
void SDRAM_Init(void)
{
  FMC_SDRAM_TimingTypeDef SDRAM_Timing;

  /*##-1- Configure the SDRAM device #########################################*/
  /* SDRAM device configuration */
  hsdram1.Instance = FMC_SDRAM_DEVICE;

  /* Timing configuration for 90 MHz of SD clock frequency (180MHz/2) */
  /* TMRD: 2 Clock cycles */
  SDRAM_Timing.LoadToActiveDelay    = 2;
  /* TXSR: min=70ns (6x11.90ns) */
  SDRAM_Timing.ExitSelfRefreshDelay = 7;
  /* TRAS: min=42ns (4x11.90ns) max=120k (ns) */
  SDRAM_Timing.SelfRefreshTime      = 4;
  /* TRC:  min=63 (6x11.90ns) */
  SDRAM_Timing.RowCycleDelay        = 7;
  /* TWR:  2 Clock cycles */
  SDRAM_Timing.WriteRecoveryTime    = 2;
  /* TRP:  15ns => 2x11.90ns */
  SDRAM_Timing.RPDelay              = 2;
  /* TRCD: 15ns => 2x11.90ns */
  SDRAM_Timing.RCDDelay             = 2;

  hsdram1.Init.SDBank             = FMC_SDRAM_BANK2;
  hsdram1.Init.ColumnBitsNumber   = FMC_SDRAM_COLUMN_BITS_NUM_8;
  hsdram1.Init.RowBitsNumber      = FMC_SDRAM_ROW_BITS_NUM_12;
  hsdram1.Init.MemoryDataWidth    = SDRAM_MEMORY_WIDTH;
  hsdram1.Init.InternalBankNumber = FMC_SDRAM_INTERN_BANKS_NUM_4;
  hsdram1.Init.CASLatency         = FMC_SDRAM_CAS_LATENCY_3;
  hsdram1.Init.WriteProtection    = FMC_SDRAM_WRITE_PROTECTION_DISABLE;
  hsdram1.Init.SDClockPeriod      = SDCLOCK_PERIOD;
  hsdram1.Init.ReadBurst          = FMC_SDRAM_RBURST_DISABLE;
  hsdram1.Init.ReadPipeDelay      = FMC_SDRAM_RPIPE_DELAY_1;

  /* Initialize the SDRAM controller */
  if(HAL_SDRAM_Init(&hsdram1, &SDRAM_Timing) != HAL_OK)
  {
    /* Initialization Error */
    Error_Handler();
  }

  /* Program the SDRAM external device */
  SDRAM_Initialization_Sequence(&hsdram1, &command);

}

rt_err_t sdram_hw_init(void)
{
  SDRAM_Init();
  return RT_EOK;
}

static int rt_sdram_hw_init(void)
{
    return (int)sdram_hw_init();
}
INIT_BOARD_EXPORT(rt_sdram_hw_init);