Minimal UPDI Programming Tool for tinyAVR

Description

This tool allows tinyAVR series 0, 1, and 2 microcontrollers to be programmed using a USB-to-serial converter connected in a special way to the UPDI pin (also called SerialUPDI). More information can be found here.

Preparations

If necessary, a driver for the USB-to-serial converter used must be installed.

Installation

Ensure that the prerequisites for installing Python packages are met. Then execute the following command in the command line:

pip install tinyupdi

Usage

Connect the USB-to-serial converter via USB to the PC and via the circuit described below to the UPDI pin of the microcontroller.

USB2SERIAL                       tinyAVR
+--------+                    +-----------+
|     RXD| <------------+---> |UPDI (PA0) |
|        |              |     |           |
|     TXD| ---|1kOhm|---+     |           |
|        |                    |           |
|     VDD| -----------------> |VDD        |
|     GND| -----------------> |GND        |
+--------+                    +-----------+

Alternatively, a pre-assembled SerialUPDI programmer can be used.

Usage: tinyupdi [-h] [-d DEVICE] [-e] [-f FLASH] [-fs [FUSES [FUSES ...]]] [-t TRIM]

Optional arguments:
  -h, --help                show help message and exit
  -d, --device              set target device (if not set, it will be auto-detected)
  -e, --erase               perform a chip erase (implied with --flash)
  -f FLASH, --flash FLASH   BIN file to flash
  -fs [FUSES [FUSES ...]], --fuses [FUSES [FUSES ...]]
                            fuses to set (syntax: fuse_nr:0xvalue)
  -t TRIM, --trim TRIM      configure oscillator for given frequency (set fuse 2)
Example:
tinyupdi -f firmware.bin -fs 6:0x04 7:0x00 8:0x00 -t 8000000

Links

• MCU Flash Tools
• MCU Templates
• MCU Development Boards
• AVR Development Boards
• AVR Programmers
• SAMD Development Boards