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01.02.2016, 03:50 Uhr
new_castle_j
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Hello,
I am seeking help in troubleshooting a newly build GNet board. I have carefully assembled the board and programmed the ATMega162 and the GAL chip. However, I have not been able to access the Debug interface.
I do not have the board installed into a machine yet. I apply 5V to pin 11 of the Z80 socket and supply ground to pin 29 of the Z80 socket, no Z80 is installed onto the board at this time. The first thing that happens is the LED in location D3 of the board blinks once. I have a USB to serial adapter connected to my Windows XP laptop and Hyperterminal configured for 9600 8 N 1, no flow control, and ANSIW terminal emulation selected. I have connected the TxD pin on the GNet board to pin 2 of my serial adapter, RxD from the GNet to pin 3 of the serial adapter, and GND to pin 5.
Pressing ENTER on the keyboard will advance the cursor down 1 line in hyperterminal, but I am not presented with the Debug interface. I have verified voltages at all ICs on the board. I do not have an O-Scope to verify 8Mhz on the ATMega, but the ATMega gets warm to the touch after being powered up.
I would like to hear any suggestions on what else I should try to get this board working, it's a very interesting board and exciting to build.
Thank You! Dieser Beitrag wurde am 01.02.2016 um 03:53 Uhr von new_castle_j editiert. |