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Altera_Forum
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20 years ago

FIFOed Avalon Uart

I have posted the FIFOed avalon UART in the Hardware Projects area. It is the standard UART that comes with Nios but it has additional features such as FIFOs and hardware CTS fifoed avalon uar...
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Altera_Forum
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14 years ago

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Hi,

I have the same problem as luchnikov mentioned above. I use the Fifoed Avalon UART 9.3 in one project and it seems to work fine. But for some reason the complete system hangs after a while.

When I debug this behaviour it shows up, that the software hangs in the altera_interrupt_handler subroutine.

Does onybody know how to fix this problem in the 9.3 version of that core?

Thanks, M.Schulz.

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Hello mschulz,

I facing same problem you had falling in deadlock situation within altera_interrupt_handler subroutine. I suppose that problem is effectively within FIFOed component. The deadlock is caused by an ipending register clear performed by FIFOed UART component before it's ISR subroutine is served.

I face the problem quite rarely and with uart speed of 460800 baud.

Did you solved your problem?

Thank you.

Regards,

Paolo