W25Q128spi flash操作成功，elm挂载失败

发布于 2019-01-08 11:49:14 浏览：5890 订阅该版

板子 **原子f103战舰v3**  flash w25q128  扇区4k参考资料：

* 官网（spi设备应用笔记）
* 官网（文件系统应用笔记）
rtconfig.h关于elm的配置：

```c
/* elm-chan's FatFs, Generic FAT Filesystem Module */

#define RT_DFS_ELM_CODE_PAGE 437
#define RT_DFS_ELM_WORD_ACCESS
#define RT_DFS_ELM_USE_LFN_3
#define RT_DFS_ELM_USE_LFN 3 
#define RT_DFS_ELM_MAX_LFN 255
#define RT_DFS_ELM_DRIVES 1
#define RT_DFS_ELM_MAX_SECTOR_SIZE 512
#define RT_DFS_ELM_REENTRANT
#define RT_USING_DFS_DEVFS
```

spi成功操作：
```c
msh />sf erase 200 9
Erase the sf_cmd flash data success. Start from 0x000000C8, size is 9.

msh />sf write 200 1 2 3 8 8 9 a
Write the sf_cmd flash data success. Start from 0x000000C8, size is 7.
Write data: 1 2 3 8 8 9 0 .

msh />sf read 200 8
Read the sf_cmd flash data success. Start from 0x000000C8, size is 8. The data is:
Offset (h) 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
[000000C8] 01 02 03 08 08 09 00 FF 
```

设备驱动：
```
msh />list_device
device          type         ref count
------- -------------------- ----------
W25Q128 Block Device         0       
spi20   SPI Device           0       
spi2    SPI Bus              0       
uart1   Character Device     2       
pin     Miscellaneous Device 0       
msh />
```
我按照资料和板子，把
```c
#define RT_DFS_ELM_MAX_SECTOR_SIZE  4096
```

打印信息：
```
 \ | /
- RT -     Thread Operating System
 / | \     4.0.0 build Jan  8 2019
 2006 - 2018 Copyright by rt-thread team
[SFUD] Find a Winbond flash chip. Size is 16777216 bytes.
[SFUD] W25Q128 flash device is initialize success.
spi flash mount to /spi failed !
然后mkfs：
msh />mkfs -t elm W25Q128
```
错误代码：
```
mkfs failed, result=-12
```

如果我把：把
```c
#define RT_DFS_ELM_MAX_SECTOR_SIZE  512
```

貌似这个没有错误提示：
```
msh />mkfs -t elm W25Q128
msh />list_device
device          type         ref count
------- -------------------- ----------
W25Q128 Block Device         0       
spi20        SPI Device             0       
spi2          SPI Bus                   0       
uart1        Character Device      2       
pin            Miscellaneous Device 0       
msh />
```

但并没有挂载成功，也不能用文件系统。