chprog

Here is yet another CH55x programmer with v1 and v2 bootloader detection and support.

This one combines code from other projects:

• vnproch551: https://github.com/NgoHungCuong/vnproch551

  used for v2.3 and v2.4 bootloader support

• libre551: https://github.com/rgwan/librech551

  used for v1.0 bootloader support

• added autodetection routine of V1 and V2 bootloaders

  No need to specify bootloader version or protocol - chprog should figure it out.

Supported are Write, Verify and Reset for all supported bootloader versions: 1.0, 2.3.1, 2.4.0, 2.5.0

Tested on:

• CH552T, BL: 1.0, 2.3.1, 2.4.0, 2.5.0
• CH551G, BL: 2.3.1

Usage is quite simple:

sudo ./chprog firmware.bin

Make sure your device is connected to USB port on your PC. The bootloader has to be activated by pressing the booloader button (or by shorting the bootloader pins/pads) on your dev board during power-on.

Win64 port Chprog can also also be compiled as a command line tool for Windows 64 bit system. A precompiled binary is in the 'releases' directory.

IMPORTANT: On Windows you need to install a Libusb driver:

• ensure the official driver from WCH is uninstalled (if you ever used the official tool)
• download 'zadig' from https://zadig.akeo.ie/ and run it
• plug in your CH55x board to usb in bootloader mode
• in zadig, click Menu->Options->List all devices (must have a check symbol displayed)
• in zadig, select 'USB Module' from the combo box
• select 'WinUSB (v6.1...)' as a driver and click the big Install button
• wait a while - the installation may take few minutes
• unplug and plug-in the CH55x board to your PC
• optionally verify in device manager that the 'USB Module' device is displayed in 'USB Serial Bus devices' - not in 'USB Serial Bus controllers'!

macOS port Chprog can be used on macOS. You need to manually install libusb driver. The simplest way is using brew, and the build_macos.shexpect libusb to be installed by brew.

brew install libusb