Router not receiving data from AVR

[Sjurlur]

Hello

I have successfully flashed the AVR, and the display shows which station is playing.
But the router does not receive tuner commands from the AVR. When I launch interface.sh, the script does not echo "Tuner Position: 0", and changing the tuner position does not have any effect.

When I had it all connected on the breadboard it worked fine, so my guess is that it is a bad connection somewhere. But I have tried to:
* resolder the RX on the router twice.
* checked that the ADC4 port on the ATmega receives correct voltage according to tuner position.
* flashed the AVR again, and ran make fuse
* reinstalled interface.sh, and display2.sh

I`m out of ideas. Any help?

[jeroen94704]

Are you comfortable making changes to the code? I tend to connect an LED to one of the GPIO pins of the microcontroller so I have at least some means of producing debugging output. That way, you can check if the ADC value inside the microcontroller corresponds with what you expect.

As a last ditch effort, you could put everything back on your breadboard, just to make sure the RX side of the router's serial port got fried somehow.

Jeroen

[mightyohm]

I suggest testing the serial port on the router with an FTDI cable so you can make sure that part works before spending too much time troubleshooting the AVR stuff.

[Sjurlur]

How do I do that? When I press keys in Zterm a light on the cable blinks, but no text is showing in the window. The router does not give any response either.

[mightyohm]

Which cable are you using? Has it ever worked? Sounds like it's not now - do you see boot messages or anything?

[djmasterg]

Hi

Had the same situation here, the soldering point was not in contact with the asus board, it only hold the pin in place. After chcecking with multimeter, I had to resolder it again porperly. So it was not the AVR fault, as Jeff says.

Regards
Greg.