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flashrom
flashrom作为一款强大的flash编程工具，集检测、读取、写入、验证和擦除功能为一体，通常用于擦写主板中闪存BIOS/EFI/coreboot/固件，同时也支持网卡（NIC）、SATA控制器卡和其他可以编程闪存芯片。
项目地址：https://github.com/flashrom/flashrom
CH347简介
CH347是一款高速USB总线转接芯片，通过USB总线提供异步串口、I2C同步串行接口、SPI同步串行接口和JTAG接口等。芯片资源如下：
1. 2个高速串口，最高波特率达9Mbps
2. 1个2线I2C接口，最高速率1MHz
3. 1个4线SPI接口，最高速率60MHz
4. 1个JTAG接口，最高速率60MHz
5. 1个SWD接口
作为CH341的升级款，CH347的功能更加强大，特别是CH347F，无需进行模式切换，即可使用所有功能。
具体可参考：
https://www.wch.cn/products/CH347.html
软件编译
代码的编译在项目中有所介绍这里不多赘述：
flashrom编译方式
而这里为了Windows系统下使用方便，特别将Windows下驱动改为官方驱动，并编译好版本，上传至GitHub仓库。
Windows版本：
https://github.com/ZhiyuanYuanNJ/flashrom/releases
软件使用
flashrom除基本的读写功能外，还可以解除芯片的读写保护，设置写保护区域以及读取芯片的Layout，具体可使用-h指令查看详情。
.\flashrom.exe -h
flashrom 1.4.0-devel (git:) on Windows 10.0 (x86_64) Dreg's mod https://www.rootkit.es v3.3
flashrom is free software, get the source code at https://flashrom.org
Using clock_gettime for delay loops (clk_id: 1, resolution: 100ns).
Usage: flashrom.exe [-h|-R|-L|
-p <programmername>[:<parameters>] [-c <chipname>]
(--flash-name|--flash-size|
[-E|-x|(-r|-w|-v) <file>]
[(-l <layoutfile>|--ifd| --fmap|--fmap-file <file>) [-i <region>[:<file>]]...]
[-n] [-N] [-f])]
[-V[V[V]]] [-o <logfile>]
-h | --help print this help text
-R | --version print version (release)
-r | --read <file> read flash and save to <file>
-w | --write (<file>|-) write <file> or the content provided
on the standard input to flash
-v | --verify (<file>|-) verify flash against <file>
or the content provided on the standard input
-E | --erase erase flash memory
-V | --verbose more verbose output
-c | --chip <chipname> probe only for specified flash chip
-f | --force force specific operations (see man page)
-n | --noverify don't auto-verify
-N | --noverify-all verify included regions only (cf. -i)
-x | --extract extract regions to files
-l | --layout <layoutfile> read ROM layout from <layoutfile>
--wp-disable disable write protection
--wp-enable enable write protection
--wp-list list supported write protection ranges
--wp-status show write protection status
--wp-range=<start>,<len> set write protection range (use --wp-range=0,0
to unprotect the entire flash)
--wp-region <region> set write protection region
--flash-name read out the detected flash name
--flash-size read out the detected flash size
--fmap read ROM layout from fmap embedded in ROM
--fmap-file <fmapfile> read ROM layout from fmap in <fmapfile>
--ifd read layout from an Intel Firmware Descriptor
-i | --include <region>[:<file>] only read/write image <region> from layout
(optionally with data from <file>)
--image <region>[:<file>] deprecated, please use --include
-o | --output <logfile> log output to <logfile>
--flash-contents <ref-file> assume flash contents to be <ref-file>
-L | --list-supported print supported devices
--progress show progress percentage on the standard output
-p | --programmer <name>[:<param>] specify the programmer device. One of
dummy, raiden_debug_spi, ft2232_spi, serprog, buspirate_spi, dediprog,
developerbox, pony_spi, usbblaster_spi, pickit2_spi, ch341a_spi, ch347_spi,
digilent_spi, stlinkv3_spi, dirtyjtag_spi.
You can specify one of -h, -R, -L, -E, -r, -w, -v or no operation.
If no operation is specified, flashrom will only probe for flash chips.
如当前连接flash为W25Q16.V
# -p指定当前adapter为CH347
.\flashrom.exe -p ch347_spi
flashrom 1.4.0-devel (git:) on Windows 10.0 (x86_64) Dreg's mod https://www.rootkit.es v3.3
flashrom is free software, get the source code at https://flashrom.org
Using clock_gettime for delay loops (clk_id: 1, resolution: 100ns).
Open CH347 device success.
Invalid SPI speed, using defaul(60M clock spi).
Found Winbond flash chip "W25Q16.V" (2048 kB, SPI) on ch347_spi.
No operations were specified.
# 指定spi速度为15M
.\flashrom.exe -p ch347_spi:spispeed=15M -r data.bin
# 默认SPI速度为60M
.\flashrom.exe -p ch347_spi -w data.bin
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