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RT Thread Studio RGB屏幕之 SDRAM配置

发布于 2022-05-09 23:36:11 浏览：1706 订阅该版

软 件：RT Thread Studio
MCU：  stm32f429bit6
sdram: W9812G2   16M 32位 SDRAM

原理图：
![image.png](https://oss-club.rt-thread.org/uploads/20220509/6b972b1ef113085fb4129377105b3cd5.png.webp)

![image.png](https://oss-club.rt-thread.org/uploads/20220509/bd82d09dd22796cb106d13e47237eb0d.png.webp)

步骤1. 复制 drv_sdram.c 文件到 drivers 文件夹内
    “drv_sdram.c”文件位于“D:/RT-ThreadStudio/repo/Extract/RT-Thread_Source_Code/RT-Thread/4.1.0/bsp/stm32/libraries/HAL_Drivers”文件夹中。

步骤2. 复制 sdram_port.h 文件到 drivers/include 文件夹内
    “sdram_port.h”文件位于“D:/RT-ThreadStudio/repo/Extract/RT-Thread_Source_Code/RT-Thread/4.1.0/bsp/stm32/stm32f429-atk-apollo/board/ports”文件夹中

步骤3. 添加“#define BSP_USING_SDRAM”
    在“board.h”中添加“#define BSP_USING_SDRAM”开启SDRAM
 ```
/*#define BSP_USING_ON_CHIP_FLASH*/

#define BSP_USING_SDRAM

/*-------------------------- ON_CHIP_FLASH CONFIG END --------------------------*/
```

步骤4. 使用 cubemx 配置 FMC
![image.png](https://oss-club.rt-thread.org/uploads/20220509/9f07a70b757e846d076c4356482d6565.png.webp)

![image.png](https://oss-club.rt-thread.org/uploads/20220509/3b94256293371c89402ad2bc45e64557.png.webp)

步骤5. 复制“cubemx\Src\fmc.c”文件内的static void HAL_FMC_MspInit(void)函数及代码到"drv_sdram.c”内，按照fmc中sdram的IO口进行修改，使能IO时钟
```
static void HAL_FMC_MspInit(void)
{
  GPIO_InitTypeDef GPIO_InitStruct = {0};

/* Peripheral clock enable */
  __HAL_RCC_FMC_CLK_ENABLE();

__HAL_RCC_GPIOC_CLK_ENABLE();
  __HAL_RCC_GPIOI_CLK_ENABLE();
  __HAL_RCC_GPIOF_CLK_ENABLE();
  __HAL_RCC_GPIOH_CLK_ENABLE();
  __HAL_RCC_GPIOG_CLK_ENABLE();
  __HAL_RCC_GPIOE_CLK_ENABLE();
  __HAL_RCC_GPIOD_CLK_ENABLE();

/** FMC GPIO Configuration
  PI9   ------> FMC_D30
  PI10   ------> FMC_D31
  PF0   ------> FMC_A0
  PF1   ------> FMC_A1
  PF2   ------> FMC_A2
  PF3   ------> FMC_A3
  PF4   ------> FMC_A4
  PF5   ------> FMC_A5
  PC0   ------> FMC_SDNWE
  PF11   ------> FMC_SDNRAS
  PF12   ------> FMC_A6
  PF13   ------> FMC_A7
  PF14   ------> FMC_A8
  PF15   ------> FMC_A9
  PG0   ------> FMC_A10
  PG1   ------> FMC_A11
  PE7   ------> FMC_D4
  PE8   ------> FMC_D5
  PE9   ------> FMC_D6
  PE10   ------> FMC_D7
  PE11   ------> FMC_D8
  PE12   ------> FMC_D9
  PE13   ------> FMC_D10
  PE14   ------> FMC_D11
  PE15   ------> FMC_D12
  PH6   ------> FMC_SDNE1
  PH7   ------> FMC_SDCKE1
  PH8   ------> FMC_D16
  PH9   ------> FMC_D17
  PH10   ------> FMC_D18
  PH11   ------> FMC_D19
  PH12   ------> FMC_D20
  PD8   ------> FMC_D13
  PD9   ------> FMC_D14
  PD10   ------> FMC_D15
  PD14   ------> FMC_D0
  PD15   ------> FMC_D1
  PG4   ------> FMC_BA0
  PG5   ------> FMC_BA1
  PG8   ------> FMC_SDCLK
  PH13   ------> FMC_D21
  PH14   ------> FMC_D22
  PH15   ------> FMC_D23
  PI0   ------> FMC_D24
  PI1   ------> FMC_D25
  PI2   ------> FMC_D26
  PI3   ------> FMC_D27
  PD0   ------> FMC_D2
  PD1   ------> FMC_D3
  PG15   ------> FMC_SDNCAS
  PE0   ------> FMC_NBL0
  PE1   ------> FMC_NBL1
  PI4   ------> FMC_NBL2
  PI5   ------> FMC_NBL3
  PI6   ------> FMC_D28
  PI7   ------> FMC_D29
  */
  /* GPIO_InitStruct */
  GPIO_InitStruct.Pin = GPIO_PIN_9|GPIO_PIN_10|GPIO_PIN_0|GPIO_PIN_1
                          |GPIO_PIN_2|GPIO_PIN_3|GPIO_PIN_4|GPIO_PIN_5
                          |GPIO_PIN_6|GPIO_PIN_7;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
  GPIO_InitStruct.Alternate = GPIO_AF12_FMC;

HAL_GPIO_Init(GPIOI, &GPIO_InitStruct);

/* GPIO_InitStruct */
  GPIO_InitStruct.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;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
  GPIO_InitStruct.Alternate = GPIO_AF12_FMC;

HAL_GPIO_Init(GPIOF, &GPIO_InitStruct);

/* GPIO_InitStruct */
  GPIO_InitStruct.Pin = GPIO_PIN_0;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
  GPIO_InitStruct.Alternate = GPIO_AF12_FMC;

HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);

/* GPIO_InitStruct */
  GPIO_InitStruct.Pin = GPIO_PIN_0|GPIO_PIN_1|GPIO_PIN_4|GPIO_PIN_5
                          |GPIO_PIN_8|GPIO_PIN_15;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
  GPIO_InitStruct.Alternate = GPIO_AF12_FMC;

HAL_GPIO_Init(GPIOG, &GPIO_InitStruct);

/* GPIO_InitStruct */
  GPIO_InitStruct.Pin = 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|GPIO_PIN_0|GPIO_PIN_1;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
  GPIO_InitStruct.Alternate = GPIO_AF12_FMC;

HAL_GPIO_Init(GPIOE, &GPIO_InitStruct);

/* GPIO_InitStruct */
  GPIO_InitStruct.Pin = GPIO_PIN_6|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;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
  GPIO_InitStruct.Alternate = GPIO_AF12_FMC;

HAL_GPIO_Init(GPIOH, &GPIO_InitStruct);

/* GPIO_InitStruct */
  GPIO_InitStruct.Pin = GPIO_PIN_8|GPIO_PIN_9|GPIO_PIN_10|GPIO_PIN_14
                          |GPIO_PIN_15|GPIO_PIN_0|GPIO_PIN_1;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
  GPIO_InitStruct.Alternate = GPIO_AF12_FMC;

HAL_GPIO_Init(GPIOD, &GPIO_InitStruct);
}
//将 HAL_FMC_MspInit() 函数放至到 static int SDRAM_Init(void) 函数中，
//一起初始化
static int SDRAM_Init(void)
{
    HAL_FMC_MspInit();

int result = RT_EOK;
    FMC_SDRAM_TimingTypeDef SDRAM_Timing;

```

步骤6. 根据所选sdram的要求修改“sdram_port.h”文件夹中的宏定义，我的sdram是W9812G2，16M，32-bit，修改后的代码为
```
#ifndef __SDRAM_PORT_H__
#define __SDRAM_PORT_H__

/* parameters for sdram peripheral */
/* Bank1 or Bank2 */
#define SDRAM_TARGET_BANK               2
/* stm32f4 Bank1:0XC0000000  Bank2:0XD0000000 */
#define SDRAM_BANK_ADDR                 ((uint32_t)0XD0000000)  // FMC SDRAM 数据基地址
/* data width: 8, 16, 32 */
#define SDRAM_DATA_WIDTH                32
/* column bit numbers: 8, 9, 10, 11 */
#define SDRAM_COLUMN_BITS               8
/* row bit numbers: 11, 12, 13 */
#define SDRAM_ROW_BITS                  12
/* cas latency clock number: 1, 2, 3 */
#define SDRAM_CAS_LATENCY               3
/* read pipe delay: 0, 1, 2 */
#define SDRAM_RPIPE_DELAY               1
/* clock divid: 2, 3 */
#define SDCLOCK_PERIOD                  2
/* refresh rate counter */
//#define SDRAM_REFRESH_COUNT             ((uint32_t)0x02AB)
#define SDRAM_REFRESH_COUNT             ((uint32_t)0x1000)      // 超时判断时间
#define SDRAM_SIZE                      ((uint32_t)0x01000000)  // 16M字节

/* Timing configuration for W9812G2 */
/* 90 MHz of SD clock frequency (180MHz/2) */
/* TMRD: 2 Clock cycles */
#define LOADTOACTIVEDELAY               2
/* TXSR: 7x11.90ns */
#define EXITSELFREFRESHDELAY            7
/* TRAS: 4x11.90ns */
#define SELFREFRESHTIME                 4
/* TRC:  7x11.90ns */
#define ROWCYCLEDELAY                   7
/* TWR:  2 Clock cycles */
#define WRITERECOVERYTIME               3
/* TRP:  2x11.90ns */
#define RPDELAY                         2
/* TRCD: 2x11.90ns */
#define RCDDELAY                        2
```

步骤7：sdram测试
![image.png](https://oss-club.rt-thread.org/uploads/20220509/32ef011067bc8b8cb86e184595ebaad7.png.webp)

enjoy it！