Multi-Protocol Programmer

Resources

Resource	Link
Wiki	Development Boards Wiki
Documentation	unit_multiprotocol_programmer_platform
Getting Started	Initial Setup
Schematic & PCB	Hardware Files
Firmware & SDK	SDK & Firmware
Main Repository	GitHub Repo

Firmware Required

This programmer requires specific firmware depending on the protocol:

• AVR: USBasp & UPDI
• ARM: CMSIS-DAP (SWD/JTAG)
• CPLD: USB-Blaster (JTAG)

Load the correct .bin before use. Without it, the device won’t function properly.

Overview

The Multi-Protocol Programmer is a USB tool based on the CH552 microcontroller. It supports flashing and debugging of:

• AVR microcontrollers (ATmega, ATtiny, AVR-DA)
• ARM Cortex-M devices (STM32, nRF52, SAM, etc.)
• Intel/Altera MAX II CPLDs (EPM240, EPM570, etc.)

Features

• USB Full-Speed (CDC/HID)
• Voltage selector: 3.3V / 5V
• SWD / JTAG / UPDI / USBasp support
• Works with popular tools (avrdude, OpenOCD, Quartus, etc.)

Supported Protocols

Firmware	Protocols	Target Devices	Interface	Tools
AVR	USBasp, UPDI	ATmega, ATtiny	CDC/HID	avrdude, Arduino IDE
CMSIS-DAP	SWD, JTAG	STM32, nRF52, ESP32-C3	HID+CDC	OpenOCD, PyOCD, Keil
CPLD	USB-Blaster	EPM240, EPM570, MAX II	HID	Quartus Prime

Flashing Firmware

1. Enter Bootloader Mode:

   • Hold BOOT, plug USB, release.

2. Flash Firmware:

   python3 tools/chprog.py firmware/firmware_name.bin

   Or use WCHISPTool on Windows.

Install Requirements

# Linux (Debian/Ubuntu)
sudo apt install build-essential sdcc python3-pip git
pip3 install pyusb

For Windows: Download SDCC, Python 3, and Git.

Troubleshooting

• Device not recognized? ➤ Check firmware & USB drivers (use Zadig on Windows)

• Programming error? ➤ Verify voltage level (3.3V/5V), connections & cable quality

• Slow upload? ➤ Reduce SWD/JTAG frequency or use shorter cables

License

• Hardware: CC BY-SA 4.0
• Firmware & Software: MIT License
• Third-party components: see individual LICENSE files