This is an port of the GoodFET JTAG430 firmware app to Arduino platform. It turns your Arduino into a MSP430 device programmer.
Currently only 4-wire JTAG is supported. Code size is around 7k so it can run on smaller chips too.
Before building configure in Makefile the port Arduino is connected to. Also make sure that gcc-avr and avr-libc are installed. Normally they are if one was programming Arduino before. Then build and upload using
make clean all upload
| Arduino | ATmega | JTAG |
|---|---|---|
| A0 | PC0 | TST |
| A1 | PC1 | RST |
| A2 | PC2 | TCK |
| A3 | PC3 | TMS |
| A4 | PC4 | TDI |
| A5 | PC5 | TDO |
| GND | GND | GND |
Using the analog pins has the advantage that the spacing between the headers is 0.1" allowing the use of a single male plug for connections. All lines have nominally 220 ohm resistors in series.
See also schematic_bb.png
NOTE: MSP430 devices run from 3.3 V. Do not use a 5 V Arduino as it stresses the chip beyond the max ratings. Even though it may not brick your chip but use at your own risk.
MSPDebug is a nice and handy backend.
Replace /dev/ttyUSB0 with the port used in Makefile.
mspdebug -j -d /dev/ttyUSB0 goodfet
Enjoy.