12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970 |
- /*
- * 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
|