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Altera_Forum's avatar
Altera_Forum
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9 years ago

Debugging the Hardware fault

I have Cyclone III fpga board with Ethernet interface and JTAG connector for Active Serial Programming through USB Blaster.

If I plug in the Ethernet connector - the PC is not recognizing the hardware - i too can make the Ethernet connector light is not coming up.

When i tried to load the boot-loader through USB Blaster - its not successful.

Under this situation i am not able to guess what went wrong - is it the fpga or eeprom - Could any one can tell me other way to understand what i should look into to correctly figure out the issue

-Suzane

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  • Altera_Forum's avatar
    Altera_Forum
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    9 years ago

    If that LED is blinking then the FPGA must be configuring from the serial PROM/EEPROM U1. So, no. I don't think you have a problem with your EEPROM.

    The fact you can't talk to the FPGA via JTAG is worrying. I've never known a 'working' board (that boots from it's EEPROM) not respond via JTAG.

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    The board is not recognizing the ethernet port also when connected to a pc also

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    What makes you think this? No LINK? Is the Phy (U13) getting the right clocks? Is it out of reset (RESET_N)?

    Cheers,

    Alex
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    9 years ago

    Hi Alex,

    I did not check the clocks. I am trying to go by some common sense - what i am trying to mean - what could be common thing involved which has disrupted the communication between JTAG to FPGA and PHY to FPGA ? AT LEAST I AM NOT ABLE TO FIGURE OUT

    Regards

    Suzane