wch-ch56x-isp is a small utility to program WCH micro-controllers. This utility is a rewrite in C of the rust tool wchisp based on https://github.com/jmaselbas/wch-isp. This utility support only WCH CH569W & CH565.

Contributor shall check CODING_STYLE.md

• Properties of project => C/C++ Build => Settings => Build Steps

  • Post-build steps:

    • riscv-none-embed-objcopy -O binary "${ProjName}.elf" "${ProjName}.bin"

  • Description:

    • Create Flash Image BIN

• Run Zadig (executable can be found on https://zadig.akeo.ie/)
• Install or Reinstall driver for "USB Module" (with USB ID 4348 55E0) with libusb-win32 or WinUSB
• Note: After 10s without any activity the device "USB Module" (with USB ID 4348 55E0) will disappear as the bootloader timeout so it shall be restarted

• See the document How_To_Build.md

• Start a shell(on GNU/Linux) or execute cmd(on Windows)

• For usage type wch-ch56x-isp -h

Usage: wch-ch56x-isp [OPTION]...
  -V, --Version             Print version
  -h, --help                Show help
  -c, --config              Print CH569 config(after isp_init and before isp_fini)
  -p, --progress            Display progress
  -v, --verify              Do verify after erase/program
  -r, --reset               Reset MCU at end
  -b, --altbootpin=VALUE    Set alt boot pin on(PA13) or off(PA5), will INVALID the image inside
  -d, --mcudebug=VALUE      Set MCU debug mode on or off
  -f, --flashfile=VALUE     Flash file (binary file *.bin)

• Standard use case to flash a bin file with verify and reset

  • GNU/Linux

    • wch-ch56x-isp -vr -f=fullpath/file.bin

  • Windows

    • wch-ch56x-isp.exe -vr -f=fullpath/file.bin

With the new version v0.3 or more the flash is automatically set depending on flash file size to set internally flash32k, flash64k or flash96k

• flash32k will change the RAMX maximum usable size to 96KB and ROM(flash code running in 0 wait sate) to 32KB
  • It is used for any code which does not exceed 32KB to run with maximum performances, application shall not use more than 96KB of RAMX
• flash64k will change the RAMX maximum usable size to 64KB and ROM(flash code running in 0 wait sate) to 64KB
  • It is used for any code which does not exceed 64KB to run with maximum performances, application shall not use more than 64KB of RAMX
• flash96k will change the RAMX maximum usable size to 32KB and ROM(flash code running in 0 wait sate) to 96KB
  • It is used for any code which does not exceed 96KB to run with maximum performances, application shall not use more than 32KB of RAMX

• If the CH56x config debug mode is on/enabled it is impossible to flash a program with wch-ch56x-isp and it will return error "Fail to program chunk @ 0 error: e0 00" (the booloader refuse to flash anything when debug mode is on/enabled and the program shall be flashed with 2-Wire Debug).
• To enable the debug mode, launch wch-ch56x-isp -d=on
• To disable the debug mode, launch wch-ch56x-isp -d=off
• To check the CH569 config debug mode, launch wch-ch56x-isp -c and it will display the config of the CH569 including debug state (DEBUG_EN 1: enabled or 0: disabled)

Example WCH569 config with debug enabled/on:

wch-ch56x-isp -c
...
config after isp_init() nv=0xCFFFF245
[4] RESET_EN 0: disabled
[5] DEBUG_EN 1: enabled
[6] BOOT_EN 1: enabled
[7] CODE_READ_EN 1: enabled
[29] LOCKUP_RST_EN 0: disabled
[31:30] USER_MEM 0x02: RAMX 96KB + ROM 32KB
config before isp_fini() nv=0xCFFFF245
...

Example WCH569 config with debug disabled/off:

wch-ch56x-isp -c
...
config after isp_init() nv=0x8FFFF245
[4] RESET_EN 0: disabled
[5] DEBUG_EN 0: disabled
[6] BOOT_EN 1: enabled
[7] CODE_READ_EN 0: disabled
[29] LOCKUP_RST_EN 0: disabled
[31:30] USER_MEM 0x02: RAMX 96KB + ROM 32KB
...

Warning: After any change to CH56x Debug mode old binary previously flashed will not run correctly, so it is mandatory to flash the program again with a binary like in example How to use wch-ch56x-isp