/* * File : drv_sdram.c * This file is part of RT-Thread RTOS * COPYRIGHT (C) 2016, RT-Thread Development Team * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. * * 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);