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Altera_Forum's avatar
Altera_Forum
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12 years ago

fifoed avalon uart custom baudrate

Hi all,

Does anyone know how can I proceed to use fifoed avalon uart in a non standard baud rate (500 000 bauds).

I have yet added 500000 at line 81 of fifoed_avalon_uart_hw.tcl : set_parameter_property baud ALLOWED_RANGES {5000000 2000000 921600 500000 460800 230400 115200 57600 38400 31250 28800 19200 14400 9600 4800 2400 1200 300}

It appears in a component GUI but i supposed this is not the only modification that we need?

Thanks

1 Reply

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

    I think you'll find the baudrates in that list are validated via other files. So, I think you'll need to do (a little) more.

    I've successfully added a custom baudrate to the standard Nios UART peripheral in this way. For that, as well as the '.tcl' file, I had to modify the 'class.ptf', 'em_uart.pl' & 'em_uart_qsys.pm' files - although each only to add the custom baudrate as an simple integer value. From memory, Qsys refused to generate until these changes were made.

    Cheers,

    Alex