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#nuvoprog - Nuvoton microcontroller programmer

nuvoprog is an open source tool for programming Nuvoton microcontollers; previously, they could only be programmed under Windows using Nuvoton's proprietary tools. This tool assumes a Nuvoton NuLink family programmer or compatible; no support is provided (yet) for other programmers.

This tool should be reasonably robust but presently has very limited device support; if you wish to add support for new devices, that would be much appreciated. Information on how to do so is at the bottom of this readme

Additionally, a human-friendly (JSON) interface to the configuration bits is provided.

The tool provides integrated help

Example usage:

$ nuvoprog read -t n76e003 dev.ihx
$ nuvoprog config decode -i dev.ihx
$ nuvoprog program -t n76e003 -c @config.json -a aprom.ihx -l ldrom.ihx

You may also be interested in libn76, a SDCC-supporting BSP for the Nuvoton N76 family.

Cortex-M devices: While I have no objections to someone adding support for these, have you considered OpenOCD?

Installing

This is a Go project; install a Go toolchain and install it using go get -u github.com/erincandescent/nuvoprog. Ensure that $GOPATH/bin is on your path (GOPATH defaults to $HOME/go); alternatively, move the resulting binary to a location of your choice.

The hidapi and libusb packages are vendored by our upstream

Supported Devices

Programmers

  • Nu-Link-Me (as found on Nu-Tiny devboards)
  • Nu-Link

Target and tested devices

  • N76E003
  • N76E616
  • N76E885

Missing functionality

  • Firmware upgrades
  • Debugging?

Adding support for new devices

To add support for new devices, you will need:

  • Windows
  • The Nuvoton ICP tool, and
  • Wireshark

A Wireshark dissector for the protocol can be found in the misc directory.

Nuvoton have an OpenOCD patch which you may find useful as reference material

Other NuLink Programmers

If this is a protocol v2 programmer, you'll need to add support for that (The leading length field changes from 8 to 16 bits, but othewise things are unchanged).

Add the VID and PID to the table in protocol/device.go and see if nuvoprog connects successfully. If it doesn't, compare protocol exchanges in Wireshark

Other Microcontrollers

First step is to see if the microcontroller belongs to the same family and if the connection and programming flow is the same (The flow should be the same for the 8051T1 family, may differ for others).

If they are, you probably just need to define target devide details:

  • Configuration bit codec
  • Target definition (see target/n76/n76e003.go)

You may need to get details like LDROM offsets from Wireshark dumps