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Topic: Help in programming the Atmega1284 with maniacbug-mighty-1284p. (Read 25 times) previous topic - next topic

retrolefty

#5
Dec 30, 2012, 03:13 pm Last Edit: Dec 30, 2012, 03:17 pm by retrolefty Reason: 1
Image is correct connecting TX to TX and Rec to Rec. However I don't see any connection to the auto-reset circuit from the arduino to the 1284p chip, so the arduino IDE has no way to initate a auto-reset for the 1284p chip to start the bootloader at the proper time. A simple jumper from the arduino board's reset pin to the 1284p reset pin should fix that situation. Try that and let us know how it works.

You may have to also remove the reset pull-up resistor on the 1284p chip as there is already a reset pull-up on the arduino board and having two in parallel may be too low a resistance for the auto-reset pulse to pull the signal low on initiation of the DTR signal.

Lefty

grimreaper

Quote
A simple jumper from the arduino board's reset pin to the 1284p reset pin should fix that situation. Try that and let us know how it works.

You may have to also remove the reset pull-up resistor on the 1284p chip as there is already a reset pull-up on the arduino board and having two in parallel may be too low a resistance for the auto-reset pulse to pull the signal low on initiation of the DTR signal.


Still, got the error, "avrdude: stk500_getsync(): not in sync: resp=0x00".



retrolefty


Quote
A simple jumper from the arduino board's reset pin to the 1284p reset pin should fix that situation. Try that and let us know how it works.

You may have to also remove the reset pull-up resistor on the 1284p chip as there is already a reset pull-up on the arduino board and having two in parallel may be too low a resistance for the auto-reset pulse to pull the signal low on initiation of the DTR signal.


Still, got the error, "avrdude: stk500_getsync(): not in sync: resp=0x00".





That's too bad. The error message just means that AVRDUDE and the bootloader aren't talking to each other. Are you sure you are selecting the proper comm port and board type (1284p) to use in the arduino IDE?

Lefty

grimreaper

Yep. Board is Mighty 1284p 16Mhz using optiboot, and COM port's right...

JoeO


Image attached..

The image shows no connection between the 220 ohm resistor and ground.
Move the wire.

If it still doesn't work, please take a real picture of your hardware and post it here.

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