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cndabaicndabai
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add on-chip flash driver for mm32f327x
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‎bsp/mm32f327x/drivers/Kconfig‎

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@@ -18,6 +18,23 @@ menu "Hardware Drivers Config"
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select RT_USING_SERIAL
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default y
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endmenu
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menu "Flash Drivers"
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config BSP_USING_OCFLASH
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bool "Enable On Chip Flash"
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default n
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config OCFLASH_USE_FAL
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bool "Enable On Chip Flash FAL Driver"
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depends on BSP_USING_OCFLASH
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select PKG_USING_FAL
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default n
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config OCFLASH_USE_LFS
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bool "Enable On Chip Flash DFS Driver"
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depends on OCFLASH_USE_FAL
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select RT_USING_DFS
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select RT_USING_MTD_NOR
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select PKG_USING_LITTLEFS
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default n
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endmenu
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endmenu
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endmenu

‎bsp/mm32f327x/drivers/SConscript‎

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@@ -17,6 +17,9 @@ if GetDepend('BSP_USING_UART1') or GetDepend('BSP_USING_UART2'):
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if GetDepend(['BSP_USING_GPIO']):
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src += ['drv_gpio.c']
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# add gpio driver code
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if GetDepend(['BSP_USING_OCFLASH']):
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src += ['drv_flash.c']
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CPPPATH = [cwd]
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group = DefineGroup('Drivers', src, depend = [''], CPPPATH = CPPPATH)

‎bsp/mm32f327x/drivers/drv_flash.c‎

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/*
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* Copyright (c) 2006-2021, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2021-08-05 mazhiyuan first version
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*/
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#include <rtthread.h>
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#include "hal_flash.h"
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#include "drv_flash.h"
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#define OCFLASH_BLK_SIZE 1024
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#define OCFLASH_LEN 1024*512
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#define OCFLASH_ADDR 0x08000000
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#ifdef OCFLASH_USE_FAL
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#include <fal.h>
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#endif
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#ifdef OCFLASH_USE_LFS
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#include <dfs_fs.h>
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#define FS_PARTITION_NAME "filesystem"
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#endif
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static int init(void)
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{
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/* do nothing now */
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return 0;
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}
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static int read(long offset, uint8_t *buf, size_t size)
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{
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size_t i;
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uint32_t addr = OCFLASH_ADDR + offset;
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for (i = 0; i < size; i++)
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{
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*buf = *(__IO uint8_t *)addr;
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buf++;
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addr++;
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}
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return size;
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}
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static int write(long offset, const uint8_t *buf, size_t size)
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{
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size_t i;
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uint32_t addr = OCFLASH_ADDR + offset;
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FLASH->KEYR = 0x45670123;
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FLASH->KEYR = 0xCDEF89AB;
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FLASH->SR = 0x00000001 | 0x00000004 | 0x00000010;
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FLASH->CR |= 0x1;
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i = 0;
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while (i < size)
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{
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*(__IO uint16_t *)addr = *buf | *(buf + 1) << 8;
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addr = addr + 2;
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buf += 2;
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i += 2;
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}
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//Lock flash
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FLASH->CR |= 0x00000080;
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return size;
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}
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static int erase(long offset, size_t size)
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{
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int len;
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RT_ASSERT(offset > 0 && offset < OCFLASH_LEN);
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int page_addr = (offset >> 10) << 10;
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len = size + (offset - page_addr);
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while (len > 0)
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{
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FLASH_Unlock();
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FLASH_ErasePage(page_addr);
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FLASH_Lock();
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len -= OCFLASH_BLK_SIZE;
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page_addr += OCFLASH_BLK_SIZE;
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}
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return size;
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}
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#ifdef OCFLASH_USE_FAL
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const struct fal_flash_dev mm32_onchip_flash =
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{
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.name = "mm32_onchip",
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.addr = 0x08000000,
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.len = 1024 * 512,
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.blk_size = 1024,
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.ops = {init, read, write, erase},
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.write_gran = 2
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};
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#endif
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int flash_init(void)
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{
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#ifdef OCFLASH_USE_FAL
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fal_init();
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#endif
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#ifdef OCFLASH_USE_LFS
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struct rt_device *flash_dev = fal_mtd_nor_device_create(FS_PARTITION_NAME);
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if (flash_dev == NULL)
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{
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rt_kprintf("Can't create a mtd device on '%s' partition.\n", FS_PARTITION_NAME);
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}
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else
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{
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rt_kprintf("Create a mtd device on the %s partition of flash successful.\n", FS_PARTITION_NAME);
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}
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if (rt_device_find(FS_PARTITION_NAME) != RT_NULL)
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{
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if (dfs_mount(FS_PARTITION_NAME, "/", "lfs", 0, 0) == RT_EOK)
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{
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rt_kprintf("onchip lfs filesystem mount to '/'\n");
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}
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else
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{
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dfs_mkfs("lfs", FS_PARTITION_NAME);
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if (dfs_mount(FS_PARTITION_NAME, "/", "lfs", 0, 0) == RT_EOK)
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{
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rt_kprintf("onchip lfs filesystem mount to '/' with mkfs\n");
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}
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else
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{
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rt_kprintf("onchip lfs filesystem mount to '/' failed!\n");
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}
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}
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}
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else
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{
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rt_kprintf("find filesystem portion failed\r\n");
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}
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#endif
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return 0;
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}
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INIT_APP_EXPORT(flash_init);

‎bsp/mm32f327x/drivers/drv_flash.h‎

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/*
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* Copyright (c) 2006-2021, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2021-08-05 mazhiyuan first version
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*/
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#ifndef __DRV_FLASH_H__
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#define __DRV_FLASH_H__
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#include <rtdevice.h>
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struct spi_flash_device
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{
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struct rt_device flash_device;
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struct rt_device_blk_geometry geometry;
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struct rt_spi_device *rt_spi_device;
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struct rt_mutex lock;
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void *user_data;
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};
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int flash_init(void);
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#endif

‎bsp/mm32f327x/drivers/fal_cfg.h‎

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/*
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* Copyright (c) 2006-2021, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2021-08-05 mazhiyuan first version
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*/
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#ifndef _FAL_CFG_H_
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#define _FAL_CFG_H_
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#include <rtconfig.h>
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#include <board.h>
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/* ===================== Flash device Configuration ========================= */
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extern const struct fal_flash_dev mm32_onchip_flash;
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extern struct fal_flash_dev nor_flash0;
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/* flash device table */
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#define FAL_FLASH_DEV_TABLE \
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{ \
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&mm32_onchip_flash, \
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}
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/* ====================== Partition Configuration ========================== */
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#ifdef FAL_PART_HAS_TABLE_CFG
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/* partition table */
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#define FAL_PART_TABLE \
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{ \
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{FAL_PART_MAGIC_WORD, "bl", "mm32_onchip", 0, 128*1024, 0}, \
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{FAL_PART_MAGIC_WORD, "filesystem", "mm32_onchip", 128*1024, 255*1024, 0}, \
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}
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#endif /* FAL_PART_HAS_TABLE_CFG */
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#endif /* _FAL_CFG_H_ */

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