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/*
* File : drv_sdram.h
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2016 RT-Thread Develop Team
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rt-thread.org/license/LICENSE
*
* Change Logs:
* Date Author Notes
* 2016-08-20 xuzhuoyi The first version for STM32F42x
*/
/* Define to prevent recursive inclusion -------------------------------------*/
#ifndef __DRV_SDRAM_H
#define __DRV_SDRAM_H
#ifdef __cplusplus
extern "C" {
#endif
/* Includes ------------------------------------------------------------------*/
#include <rtthread.h>
#include <board.h>
#define SDRAM_BANK_ADDR ((uint32_t)0XC0000000)
/* #define SDRAM_MEMORY_WIDTH FMC_SDRAM_MEM_BUS_WIDTH_8 */
#define SDRAM_MEMORY_WIDTH FMC_SDRAM_MEM_BUS_WIDTH_16
#define SDCLOCK_PERIOD FMC_SDRAM_CLOCK_PERIOD_2
/* #define SDCLOCK_PERIOD FMC_SDRAM_CLOCK_PERIOD_3 */
#define SDRAM_TIMEOUT ((uint32_t)0xFFFF)
#define SDRAM_MODEREG_BURST_LENGTH_1 ((uint16_t)0x0000)
#define SDRAM_MODEREG_BURST_LENGTH_2 ((uint16_t)0x0001)
#define SDRAM_MODEREG_BURST_LENGTH_4 ((uint16_t)0x0002)
#define SDRAM_MODEREG_BURST_LENGTH_8 ((uint16_t)0x0004)
#define SDRAM_MODEREG_BURST_TYPE_SEQUENTIAL ((uint16_t)0x0000)
#define SDRAM_MODEREG_BURST_TYPE_INTERLEAVED ((uint16_t)0x0008)
#define SDRAM_MODEREG_CAS_LATENCY_2 ((uint16_t)0x0020)
#define SDRAM_MODEREG_CAS_LATENCY_3 ((uint16_t)0x0030)
#define SDRAM_MODEREG_OPERATING_MODE_STANDARD ((uint16_t)0x0000)
#define SDRAM_MODEREG_WRITEBURST_MODE_PROGRAMMED ((uint16_t)0x0000)
#define SDRAM_MODEREG_WRITEBURST_MODE_SINGLE ((uint16_t)0x0200)
#define BUFFER_SIZE ((uint32_t)0x0100)
#define WRITE_READ_ADDR ((uint32_t)0x0800)
#define REFRESH_COUNT ((uint32_t)0x02AB) /* SDRAM refresh counter (90MHz SD clock) */
/**
* @}
*/
/** @defgroup STM32429I_DISCO_SDRAM_Exported_Functions
* @{
*/
void SDRAM_Init(void);
void SDRAM_GPIOConfig(void);
void SDRAM_InitSequence(void);
void SDRAM_WriteBuffer(uint32_t* pBuffer, uint32_t uwWriteAddress, uint32_t uwBufferSize);
void SDRAM_ReadBuffer(uint32_t* pBuffer, uint32_t uwReadAddress, uint32_t uwBufferSize);
#ifdef __cplusplus
}
#endif
#endif
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