RT-Thread-easyflash初始化env无法自动写入默认环境变量？RT-Thread问答社区

easyflash初始化env无法自动写入默认环境变量？

发布于 2020-07-28 23:29:49 浏览：1451 订阅该版

平台：STM32F103ZET6
      W25Q64
      easyflash:4.1.0
问题描述：本人想将变量保存在外部Flash W25Q64中，首先利用fal命令将W25Q64中的数据清除(如果是新设备，里面是没有数据的），然后将程序下载进去。
当最小擦除粒度是4096，最小写入粒度是1。此种情况下下载程序，第一次没有获取到环境变量，env版本更新后重新下载就有变量。
因为新手，不太熟悉这个组件，所以请各位大神赐教。
![image.png](/uploads/20200728/789a379f5307e7e244fd2df61b666319.png)
当最小擦除粒度是4096，最小写入粒度是1。此种情况下下载程序，无法获取到环境变量。
![image.png](/uploads/20200728/838abb48f8c8b5e2229fe329e239da6f.png)
利用printenv命令，得到以下信息：
![image.png](/uploads/20200728/a660a56027e3cc032f77ff2924ad12c2.png)
但是实际的配置应该是![image.png](/uploads/20200728/f154a8d0f3897947b318e7dade1f36c9.png)
如果这时候将env版本升级，其余内容不变下载进去，就会有默认配置。
![image.png](/uploads/20200728/40f6ff76f95da8b4271fa901d8db9961.png)
以下是env测试程序：
![image.png](/uploads/20200728/1bde596595c21127cf72f9761d579aac.png)

以下是串口的输出日志：
[SFUD] (../rt-thread/components/drivers/spi/sfud/src/sfud.c:862) The flash device manufacturer ID is 0xEF, memory type ID is 0x40, capacity ID is 0
x17.
[SFUD] (../rt-thread/components/drivers/spi/sfud/src/sfud_sfdp.c:132) Check SFDP header is OK. The reversion is V1.0, NPN is 0.
[SFUD] (../rt-thread/components/drivers/spi/sfud/src/sfud_sfdp.c:175) Check JEDEC basic flash parameter header is OK. The table id is 0, reversion
is V1.0, length is 9, parameter table pointer is 0x000080.
[SFUD] (../rt-thread/components/drivers/spi/sfud/src/sfud_sfdp.c:203) JEDEC basic flash parameter table info:
[SFUD] (../rt-thread/components/drivers/spi/sfud/src/sfud_sfdp.c:204) MSB-LSB  3    2    1    0
[SFUD] (../rt-thread/components/drivers/spi/sfud/src/sfud_sfdp.c:207) [0001] 0xFF 0xF1 0x20 0xE5
[SFUD] (../rt-thread/components/drivers/spi/sfud/src/sfud_sfdp.c:207) [0002] 0x03 0xFF 0xFF 0xFF
[SFUD] (../rt-thread/components/drivers/spi/sfud/src/sfud_sfdp.c:207) [0003] 0x6B 0x08 0xEB 0x44
[SFUD] (../rt-thread/components/drivers/spi/sfud/src/sfud_sfdp.c:207) [0004] 0xBB 0x42 0x3B 0x08
[SFUD] (../rt-thread/components/drivers/spi/sfud/src/sfud_sfdp.c:207) [0005] 0xFF 0xFF 0xFF 0xFE
[SFUD] (../rt-thread/components/drivers/spi/sfud/src/sfud_sfdp.c:207) [0006] 0x00 0x00 0xFF 0xFF
[SFUD] (../rt-thread/components/drivers/spi/sfud/src/sfud_sfdp.c:207) [0007] 0xEB 0x21 0xFF 0xFF
[SFUD] (../rt-thread/components/drivers/spi/sfud/src/sfud_sfdp.c:207) [0008] 0x52 0x0F 0x20 0x0C
[SFUD] (../rt-thread/components/drivers/spi/sfud/src/sfud_sfdp.c:207) [0009] 0x00 0x00 0xD8 0x10
[SFUD] (../rt-thread/components/drivers/spi/sfud/src/sfud_sfdp.c:215) 4 KB Erase is supported throughout the device. Command is 0x20.
[SFUD] (../rt-thread/components/drivers/spi/sfud/src/sfud_sfdp.c:234) Write granularity is 64 bytes or larger.
[SFUD] (../rt-thread/components/drivers/spi/sfud/src/sfud_sfdp.c:245) Target flash status register is non-volatile.
[SFUD] (../rt-thread/components/drivers/spi/sfud/src/sfud_sfdp.c:271) 3-Byte only addressing.
[SFUD] (../rt-thread/components/drivers/spi/sfud/src/sfud_sfdp.c:305) Capacity is 8388608 Bytes.
[SFUD] (../rt-thread/components/drivers/spi/sfud/src/sfud_sfdp.c:312) Flash device supports 4KB block erase. Command is 0x20.
[SFUD] (../rt-thread/components/drivers/spi/sfud/src/sfud_sfdp.c:312) Flash device supports 32KB block erase. Command is 0x52.
[SFUD] (../rt-thread/components/drivers/spi/sfud/src/sfud_sfdp.c:312) Flash device supports 64KB block erase. Command is 0xD8.
[SFUD] Find a Winbond flash chip. Size is 8388608 bytes.
[SFUD] (../rt-thread/components/drivers/spi/sfud/src/sfud.c:840) Flash device reset success.
[SFUD] W25Q64 flash device is initialize success.
[SFUD] Probe SPI flash W25Q64 by SPI device spi10 success.
[D/FAL] (fal_flash_init:49) Flash device |             onchip_flash | addr: 0x08000000 | len: 0x00080000 | blk_size: 0x00000800 |initialized finish
.
[D/FAL] (fal_flash_init:49) Flash device |                   W25Q64 | addr: 0x00000000 | len: 0x00800000 | blk_size: 0x00001000 |initialized finish
.
[I/FAL] ==================== FAL partition table ====================
[I/FAL] | name      | flash_dev    |   offset   |    length  |
[I/FAL] -------------------------------------------------------------
[I/FAL] | bl        | onchip_flash | 0x00000000 | 0x00010000 |
[I/FAL] | app       | onchip_flash | 0x00010000 | 0x00064000 |
[I/FAL] | param     | onchip_flash | 0x00074000 | 0x0000c000 |
[I/FAL] | easyflash | W25Q64       | 0x00000000 | 0x00400000 |
[I/FAL] | download  | W25Q64       | 0x00400000 | 0x00400000 |
[I/FAL] =============================================================
[I/FAL] RT-Thread Flash Abstraction Layer (V0.5.99) initialize success.
[Flash] (../packages/EasyFlash-latest/src/ef_env.c:1820) ENV start address is 0x00000000, size is 8192 bytes.
[Flash] (../packages/EasyFlash-latest/src/ef_env.c:1664) Update the ENV from version 0 to 1.
msh >[Flash] EasyFlash V4.1.99 is initialize success.
[Flash] You can get the latest version on https://github.com/armink/EasyFlash .
c_old_boot=dandelion4277
len=13
len=13,username=dandelion4277
len=2
len=2,password=23
len=1
len=1,c_old_boot_time=1