I can't see where I've gone wrong, can someone point me in the right direction?
I bought several DC Boarduino's at the Newcastle Makerfaire in the UK. I built one (it has "v1.0" on the PCB, a '328P, and an LM7805, and I put in C6), and I could swear (but I'm not completely sure that I), using the Arduino_0012 software (which only supported the 168's) successfully uploaded the blink sketch to verify it working. All's well, or so I thought. That was a month or two ago.
Last night, I tried to upload a sketch. I connected the known-good USB RTL cable the correct way, made sure power was from "usb" (the RTL cable), and tried to upload a different blink sketch. Incidentally, the usb port has the 'Set RTS on close' tick set.
The LED flickered a little bit, indicating that it was trying to communicate with my computer, and then the same blinking started again.
After a while, the IDE showed the error:
avrdude: stk500_getsync(): not in sync: resp=0x00
avrdude: stk_500_disable(): protocol error, expect=0x14, resp=0x51
Since that didn't work, I downloaded Arduino_0017, and tried compiling and uploading with that, with the board setting as 'Arduino Duemilanove or Nano w/ ATmega328'.
I've tried changing the setting to the various 328's, recompiling, and then uploading. I've tried changing to the 168's and uploading. I tried playing with boards.txt to see if changing the parameters helped. I've tried pushing the reset button both before and after pressing the 'upload' key.
I can't seem to even affect the behaviour. It's always the same: I click on 'Upload', the LED blinks a little bit, and then goes back to the regular flashing of the blink sketch.
Thinking that the IDE might be bogus, I then used a different cable, and downloaded to a real Arduino (changing the chip to a 168 and the port to the different port), and the sketch went in first time.
Any suggestions? The Boarduino /seems/ to be working fine, as it powers up, and blinks merrily away. The solder connections all seem good. It /seems/ to hear the USB cable, otherwise it wouldn't blink. The IDE is working because it loads into a pukka arduino. I can't pinpoint where the trouble might be.
Thanks for any help!