What's the easiest way to control a TI Launchpad (MSP430) from Linux over USB? I just want to use the board to drive some LEDs while it's tethered to my computer, so I'm looking for a way to simply control the output pins via a TTY or mspdebug or similar. I don't have a crystal on my board yet, but can add one if needed.
http://github.com/dwelch67/msp430_samples I use mspdebug to load programs.
I dont know if there is a communcation path between the target mcu and the host. the mcu in the middle is the one you talk to and it uses spi by wire to load the target device.
I either bitbang or use the uart in the g2553 part to communicate with the host using a separate ftdi based usb to serial board (the kind used with 3.3v arduinos are super easy to come by, can also power the msp430 with this if you dont need to reprogram it.
The TI LaunchPad should show up as a USB serial device while in operation. You should be able to write a program that talks over this serial device with commands that you create in order to change your LED status. It might be easiest to start by making these serial commands human readable so that you can test them from a serial terminal program such PuTTY, Hyperterminal, minicom, etc.