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Altera_Forum's avatar
Altera_Forum
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19 years ago

How to use small driver of JTAG_UART

Dear All,

<div class='quotetop'>QUOTE </div>

--- Quote Start ---

&#9632; Specify the preprocessor option

-DALTERA_AVALON_JTAG_UART_SMALL. You can use this option if

you want the small, polled implementation of the JTAG UART

driver, but you do not want to affect the drivers for other devices.[/b]

--- Quote End ---

I find the information above from Altera Embedded Peripherals Handbook.pdf--page68.

But I don&#39;t know how to implement it.

I have tried define ALTERA_AVALON_JTAG_UART_SMALL in project properties:

C/C++ Build->Tool Settings->Nios II Compiler->Preprocessor->Defined Symbols

But after recompiling project, I found that it didn&#39;t take effect. JTAG_UART still work in interrupt-driven way. Also I can step into altera_avalon_jtag_uart.c to prove that fast driver is in use.

I do not want to affect the drivers for other devices when use small driver of JTAG_UART. So I need to use ALTERA_AVALON_JTAG_UART_SMALL symbol.

Anyone help?

David

2 Replies

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

    I have solved this issue.

    <div class='quotetop'>QUOTE </div>

    --- Quote Start ---

    I have tried define ALTERA_AVALON_JTAG_UART_SMALL in project properties:

    C/C++ Build->Tool Settings->Nios II Compiler->Preprocessor->Defined Symbols[/b]

    --- Quote End ---

    This operation should work on system library project but not on your application project. http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/biggrin.gif http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/happy.gif
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    19 years ago

    --- Quote Start ---

    originally posted by david_cai@Jul 13 2006, 08:13 AM

    i have solved this issue.

    <div class='quotetop'>quote

    --- quote end ---

    --- quote start ---

    i have tried define altera_avalon_jtag_uart_small in project properties:

    c/c++ build->tool settings->nios ii compiler->preprocessor->defined symbols

    --- Quote End ---

    This operation should work on system library project but not on your application project. http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/biggrin.gif http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/happy.gif

    <div align='right'><{post_snapback}> (index.php?act=findpost&pid=16851)</div>

    [/b]

    --- Quote End ---

    Hi David_Cai!

    Another way to define ALTERA_AVALON_JTAG_UART_SMALL in Nios IDE is checked box in "System Library Properties" -> Reduce device drivers

    http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/smile.gif