add on-chip flash driver for mm32f327x

bsp/mm32f327x/drivers/Kconfig

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

bsp/mm32f327x/drivers/SConscript

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

bsp/mm32f327x/drivers/drv_flash.c

@@ -0,0 +1,145 @@
+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2021-08-05     mazhiyuan   first version
+ */
+
+
+#include <rtthread.h>
+#include "hal_flash.h"
+#include "drv_flash.h"
+
+#define OCFLASH_BLK_SIZE 1024
+#define OCFLASH_LEN 1024*512
+#define OCFLASH_ADDR 0x08000000
+
+#ifdef OCFLASH_USE_FAL
+    #include <fal.h>
+#endif
+
+#ifdef OCFLASH_USE_LFS
+    #include <dfs_fs.h>
+    #define FS_PARTITION_NAME "filesystem"
+#endif
+
+static int init(void)
+{
+    /* do nothing now */
+    return 0;
+}
+
+static int read(long offset, uint8_t *buf, size_t size)
+{
+    size_t i;
+    uint32_t addr = OCFLASH_ADDR + offset;
+    for (i = 0; i < size; i++)
+    {
+        *buf = *(__IO uint8_t *)addr;
+        buf++;
+        addr++;
+    }
+    return size;
+}
+
+static int write(long offset, const uint8_t *buf, size_t size)
+{
+    size_t i;
+    uint32_t addr = OCFLASH_ADDR + offset;
+
+    FLASH->KEYR = 0x45670123;
+    FLASH->KEYR = 0xCDEF89AB;
+    FLASH->SR = 0x00000001 | 0x00000004 | 0x00000010;
+    FLASH->CR |= 0x1;
+
+    i = 0;
+    while (i < size)
+    {
+        *(__IO uint16_t *)addr = *buf | *(buf + 1) << 8;
+        addr = addr + 2;
+        buf += 2;
+        i += 2;
+    }
+    //Lock flash
+    FLASH->CR |= 0x00000080;
+
+    return size;
+}
+
+static int erase(long offset, size_t size)
+{
+    int len;
+    RT_ASSERT(offset > 0 && offset < OCFLASH_LEN);
+    int page_addr = (offset >> 10) << 10;
+    len = size + (offset - page_addr);
+    while (len > 0)
+    {
+        FLASH_Unlock();
+        FLASH_ErasePage(page_addr);
+        FLASH_Lock();
+        len -= OCFLASH_BLK_SIZE;
+        page_addr += OCFLASH_BLK_SIZE;
+    }
+
+    return size;
+}
+
+#ifdef OCFLASH_USE_FAL
+const struct fal_flash_dev mm32_onchip_flash =
+{
+    .name       = "mm32_onchip",
+    .addr       = 0x08000000,
+    .len        = 1024 * 512,
+    .blk_size   = 1024,
+    .ops        = {init, read, write, erase},
+    .write_gran = 2
+};
+#endif
+
+int flash_init(void)
+{
+#ifdef OCFLASH_USE_FAL
+    fal_init();
+#endif
+#ifdef OCFLASH_USE_LFS
+    struct rt_device *flash_dev = fal_mtd_nor_device_create(FS_PARTITION_NAME);
+
+    if (flash_dev == NULL)
+    {
+        rt_kprintf("Can't create a mtd device on '%s' partition.\n", FS_PARTITION_NAME);
+    }
+    else
+    {
+        rt_kprintf("Create a mtd device on the %s partition of flash successful.\n", FS_PARTITION_NAME);
+    }
+
+    if (rt_device_find(FS_PARTITION_NAME) != RT_NULL)
+    {
+        if (dfs_mount(FS_PARTITION_NAME, "/", "lfs", 0, 0) == RT_EOK)
+        {
+            rt_kprintf("onchip lfs filesystem mount to '/'\n");
+        }
+        else
+        {
+            dfs_mkfs("lfs", FS_PARTITION_NAME);
+            if (dfs_mount(FS_PARTITION_NAME, "/", "lfs", 0, 0) == RT_EOK)
+            {
+                rt_kprintf("onchip lfs filesystem mount to '/' with mkfs\n");
+            }
+            else
+            {
+                rt_kprintf("onchip lfs filesystem mount to '/' failed!\n");
+            }
+        }
+    }
+    else
+    {
+        rt_kprintf("find filesystem portion failed\r\n");
+    }
+#endif
+    return 0;
+}
+INIT_APP_EXPORT(flash_init);

bsp/mm32f327x/drivers/drv_flash.h

@@ -0,0 +1,27 @@
+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2021-08-05     mazhiyuan   first version
+ */
+
+#ifndef __DRV_FLASH_H__
+#define __DRV_FLASH_H__
+
+#include <rtdevice.h>
+
+struct spi_flash_device
+{
+    struct rt_device                flash_device;
+    struct rt_device_blk_geometry   geometry;
+    struct rt_spi_device           *rt_spi_device;
+    struct rt_mutex                 lock;
+    void                           *user_data;
+};
+
+int flash_init(void);
+
+#endif

bsp/mm32f327x/drivers/fal_cfg.h

@@ -0,0 +1,37 @@
+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2021-08-05     mazhiyuan   first version
+ */
+
+#ifndef _FAL_CFG_H_
+#define _FAL_CFG_H_
+
+#include <rtconfig.h>
+#include <board.h>
+
+
+/* ===================== Flash device Configuration ========================= */
+extern const struct fal_flash_dev mm32_onchip_flash;
+extern struct fal_flash_dev nor_flash0;
+
+/* flash device table */
+#define FAL_FLASH_DEV_TABLE                                          \
+{                                                                    \
+    &mm32_onchip_flash,                                           \
+}
+/* ====================== Partition Configuration ========================== */
+#ifdef FAL_PART_HAS_TABLE_CFG
+/* partition table */
+#define FAL_PART_TABLE                                                               \
+{                                                                                    \
+    {FAL_PART_MAGIC_WORD,          "bl",     "mm32_onchip",         0,  128*1024, 0}, \
+    {FAL_PART_MAGIC_WORD,  "filesystem",     "mm32_onchip",  128*1024,  255*1024, 0}, \
+}
+#endif /* FAL_PART_HAS_TABLE_CFG */
+
+#endif /* _FAL_CFG_H_ */