rt-thread-official/bsp/stm32/stm32h743-openmv-h7plus/board/ports/sdram_port.h

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2022-01-03 10:15:55 +08:00
/*
* Copyright (c) 2006-2022, RT-Thread Development Team
2022-01-03 10:15:55 +08:00
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2021-12-14 supperthomas The first version for STM32H7xx
*/
#ifndef __SDRAM_PORT_H__
#define __SDRAM_PORT_H__
/* parameters for sdram peripheral */
/* Bank1 or Bank2 */
#define SDRAM_TARGET_BANK 1
/* stm32h7 Bank1:0XC0000000 Bank2:0XD0000000 */
#define SDRAM_BANK_ADDR ((uint32_t)0XC0000000)
/* data width: 8, 16, 32 */
#define SDRAM_DATA_WIDTH 32
/* column bit numbers: 8, 9, 10, 11 */
#define SDRAM_COLUMN_BITS 9
/* row bit numbers: 11, 12, 13 */
#define SDRAM_ROW_BITS 12
/* cas latency clock number: 1, 2, 3 */
#define SDRAM_CAS_LATENCY 2
/* read pipe delay: 0, 1, 2 */
#define SDRAM_RPIPE_DELAY 0
/* clock divid: 2, 3 */
#define SDCLOCK_PERIOD 2
/* refresh rate counter */
#define SDRAM_REFRESH_RATE (64) // ms
#define SDRAM_FREQUENCY (100000) // 100 MHz
#define SDRAM_REFRESH_CYCLES 4096
#define SDRAM_REFRESH_COUNT (SDRAM_REFRESH_RATE * SDRAM_FREQUENCY / SDRAM_REFRESH_CYCLES - 20) //((uint32_t)0x02A5)
#define SDRAM_SIZE (32 * 1024 * 1024)
/* Timing configuration for W9825G6KH-6 */
/* 100 MHz of HCKL3 clock frequency (200MHz/2) */
/* TMRD: 2 Clock cycles */
#define LOADTOACTIVEDELAY 2
/* TXSR: 8x10ns */
#define EXITSELFREFRESHDELAY 7
/* TRAS: 5x10ns */
#define SELFREFRESHTIME 5
/* TRC: 7x10ns */
#define ROWCYCLEDELAY 6
/* TWR: 2 Clock cycles */
#define WRITERECOVERYTIME 3
/* TRP: 2x10ns */
#define RPDELAY 2
/* TRCD: 2x10ns */
#define RCDDELAY 2
/* memory mode register */
#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)
#endif