W25Q256 使用SFUD驱动的一些疑问

发布于 2019-08-23 16:38:46 浏览：4431 订阅该版

平台是正点原子F429，代码是最新同步的。我在测试SPI Flash目前有以下三个疑问请教各位：
**在fal_flash_sfud_port.c定义如下：**
```struct fal_flash_dev nor_flash0 = {FAL_USING_NOR_FLASH_DEV_NAME, 0, 32* 1024 * 1024, 4096, {init,read, write, erase}};```

**问题1：不清楚什么触发了以下两句断言。**
int fal_flash_init(void)
{
.........
assert(device_table*->ops.read);
//如果注释以下两句就会触发断言，但是注释了后，能使用easyflash正常读写外部flash的数据。
    //assert(device_table*->ops.write);
     //assert(device_table*->ops.erase);
.........
}
注释上述两句断言，上电打印的初始化信息如下

``` \ | /
- RT -     Thread Operating System
 / | \     4.0.2 build Aug 23 2019
 2006 - 2019 Copyright by rt-thread team
[SFUD] (..\..\..\components\drivers\spi\sfud\src\sfud.c:861) The flash device manufacturer ID is 0xEF, memory type ID is 0x40, capacity ID is 0x19.
[SFUD] (..\..\..\components\drivers\spi\sfud\src\sfud_sfdp.c:122) Error: Check SFDP signature error. It's must be 50444653h('S' 'F' 'D' 'P').
[SFUD] Warning: Read SFDP parameter header information failed. The W25Q256 is not support JEDEC SFDP.
[SFUD] Find a Winbond W25Q256FV flash chip. Size is 33554432 bytes.
[SFUD] (..\..\..\components\drivers\spi\sfud\src\sfud.c:840) Flash device reset success.
[SFUD] (..\..\..\components\drivers\spi\sfud\src\sfud.c:941) Enter 4-Byte addressing mode success.
[SFUD] W25Q256 flash device is initialize success.
[SFUD] Probe SPI flash W25Q256 by SPI device spi50 success.
[D/FAL] (fal_flash_init:61) Flash device |                       L$ | addr: 0x00000000 | len: 0x0000ffff | blk_size: 0x00000000 |initialized finish.
[D/FAL] (fal_partition_init:272) Warning: Do NOT found the flash device(W25Q256).
[D/FAL] (fal_partition_init:272) Warning: Do NOT found the flash device(W25Q256).
[32;22m[I/FAL] ==================== FAL partition table ====================[0m
[32;22m[I/FAL] | name     | flash_dev |   offset   |    length  |[0m
[32;22m[I/FAL] -------------------------------------------------------------[0m
[32;22m[I/FAL] | ef       | W25Q256   | 0x00000000 | 0x00200000 |[0m
[32;22m[I/FAL] | download | W25Q256   | 0x00200000 | 0x00300000 |[0m
[32;22m[I/FAL] =============================================================[0m
[32;22m[I/FAL] RT-Thread Flash Abstraction Layer (V0.4.0) initialize success.[0m
[Flash] (packages\EasyFlash-latest\src\ef_env.c:1764) ENV start address is 0x00000000, size is 8192 bytes.
[Flash] EasyFlash V4.0.99 is initialize success.
[Flash] You can get the latest version on https://github.com/armink/EasyFlash .
msh >```

之后使用easyflash读写都没有问题。

**问题2：以下两句错误和警告怎么消除。**
```[SFUD] (..\..\..\components\drivers\spi\sfud\src\sfud_sfdp.c:122) Error: Check SFDP signature error. It's must be 50444653h('S' 'F' 'D' 'P').
[SFUD] Warning: Read SFDP parameter header information failed. The W25Q256 is not support JEDEC SFDP.```

**问题3:驱动应该是有是有问题，运行sf bench yes会shell卡死。easyfalsh读写却是正常。**
```sf write 4096 2 3 4 5
Write the sf_cmd flash data success. Start from 0x00001000, size is 4.
Write data: 2 3 4 5 .
msh >
msh >sf read 4096 10
Read the sf_cmd flash data success. Start from 0x00001000, size is 10. The data is:
Offset (h) 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
[00001000] 00 02 00 00 45 46 34 30 FF FF                   ....EF40..
easyfalsh测试
msh >setenv 3257 33
msh >
msh >printenv
222=35
3257=33
msh >```