[linux] flashrom使用ft232h读写 烧录 fl
2023-10-27 本文已影响0人
skkily
1.0 前言
一种可以在linux下读写flash的方案
测试发行版操作系统: Debian10 Ubuntu 22.04 免驱动
读速度: 2秒可以吧4Mbyte flash读出
写速度: 74秒写入1Mbyte的内容到flash
写特性: flashrom会读出旧flash内容, 与待写入的数据对比, 然后只写入有差异的块, 所以如果新固件修改较小的话, 写入时间将会很短.
2.0 引脚定义
ft232h模块图示及引脚定义:
flash引脚定义
从左上角的圆圈标记点开始逆时针标记为pin 1-8
3.0 接线方式
- AD0 接 pin 6
- AD1 接 pin 5
- AD2 接 pin 2
- AD4 接 pin 1
- pin 3 (写保护) 接 3.3V
- pin 4 (GND) 接 GND
- pin 7 (HOLD) 接 3.3V
- pin 8 (VCC) 接 3.3v
4.0 读写flash
如果未安装flashrom的话, 执行安装命令
sudo apt install flashrom
或者自行编译以支持更多型号的flash
4.1 测试是否可以识别到ft232h及flash
sudo flashrom -p ft2232_spi:type=232H
如下输出时表示已经识别到flash的型号:W25Q32.V
flashrom v1.2 on Linux 6.2.0-35-generic (x86_64)
flashrom is free software, get the source code at https://flashrom.org
Using clock_gettime for delay loops (clk_id: 1, resolution: 1ns).
Found Winbond flash chip "W25Q32.V" (4096 kB, SPI) on ft2232_spi.
No operations were specified.
4.2 读出flash
sudo flashrom -p ft2232_spi:type=232H -r rom.bin
flashrom v1.2 on Linux 6.2.0-35-generic (x86_64)
flashrom is free software, get the source code at https://flashrom.org
Using clock_gettime for delay loops (clk_id: 1, resolution: 1ns).
Found Winbond flash chip "W25Q32.V" (4096 kB, SPI) on ft2232_spi.
Reading flash... done.
4.3 写入flash
sudo flashrom -p ft2232_spi:type=232H -w rom.bin
flashrom v1.2 on Linux 6.2.0-35-generic (x86_64)
flashrom is free software, get the source code at https://flashrom.org
Using clock_gettime for delay loops (clk_id: 1, resolution: 1ns).
Found Winbond flash chip "W25Q32.V" (4096 kB, SPI) on ft2232_spi.
Reading old flash chip contents... done.
Erasing and writing flash chip... Erase/write done.
Verifying flash... VERIFIED.
参考资料:
https://learn.adafruit.com/programming-spi-flash-prom-with-an-ft232h-breakout/overview
