I just put together my 0.3.7 board yesterday and it had no issues installing firmware or connecting to tuner studio, but now it just isnt working and TS does not detect the board at all. I tried using a different usb connector with no luck, and I tried resetting the mega and reinstalling the firmware, but it only does it with the mega detached from the speeduino now, where yesterday it had no problem uploading the firmware with everything put together. With the speeduino attached it says the upload failed with this message:
avrdude: stk500v2_ReceiveMessage(): timeout
avrdude: stk500v2_getsync(): timeout communicating with programmer
The only things Ive done in between yesterday and today were hookup the IAT to test that(which didnt seem to work) and I put a jumper between the TPS and TPS return pins to stop the erratic behavior of that gauge in TS. I dont think the mega is bad since that works fine with the tx and rx leds flashing when the firmware uploads to the mega itself, just once the speeduino is attached it doesnt seem to respond at all. Any ideas on what could have gone wrong? Could I have screwed up the speeduino?