Skip to main content
R
ricardo2399
Visitor II
December 16, 2008
Question

GPIO8 and ETHERNET incompat

  • December 16, 2008
  • 6 replies
  • 1417 views
Posted on December 16, 2008 at 09:05

GPIO8 and ETHERNET incompat

    This topic has been closed for replies.

    6 replies

    R
    ricardo2399Author
    Visitor II
    May 17, 2011
    Posted on May 17, 2011 at 09:55

    Hi everyone

    I'm experiencing a problem betwen GPIO8 and ENET port.

    When i configure and init GPIO8, ENET just stop working, and i can´t see why!!

    Did anyone already had this problem?

    Thanks ppl :|

    U
    usatyj
    Visitor II
    May 17, 2011
    Posted on May 17, 2011 at 09:55

    There is a problem with init GPIO8 throuth GPIO_Init function! see gpio bug in forum.

    D
    dhoyen
    Visitor II
    May 17, 2011
    Posted on May 17, 2011 at 09:55

    Hi guys,

    Could you give more information about this bug ?

    I use both (Ethernet, as GPIO8) and not (yet) look a problem. What is the symptom.

    I m using the ST lib v2.0.

    Thanks in advance.

    U
    usatyj
    Visitor II
    May 17, 2011
    Posted on May 17, 2011 at 09:55

    If you try to initialise GPIO8 thruth GPIO library? GPIO_Init function write into GPIO0, not in GPIO8 (because GPIO8 have not such registers).

    But if you not use GPIO0, you do not see this problem.

    D
    dhoyen
    Visitor II
    May 17, 2011
    Posted on May 17, 2011 at 09:55

    Ok,

    Effectively, i don't use the GPIO0,

    that's why, i couldn't detect this problem.

    Regards.

    Damien

    B
    boris1
    Visitor II
    May 17, 2011
    Posted on May 17, 2011 at 09:55

    I'm also have this problem!

    I found that if I do like that:

    Code:

    <BR><BR> SCU_APBPeriphClockConfig(__GPIO8 ,ENABLE); <BR><BR> SCU_APBPeriphReset(__GPIO8,DISABLE); <BR><BR> SCU_APBPeriphClockConfig(__GPIO9 ,ENABLE); <BR><BR> SCU_APBPeriphReset(__GPIO9,DISABLE); <BR><BR> GPIO8->DDR = 0xFF; <BR><BR> GPIO9->DDR = 0x07; <BR><BR>

    than I have problem in 91x_enet.c file in function ENET_Init(). In the code:

    Code:

    <BR><BR> /* De-assert the SRESET bit of ENET + MAC devices */ <BR><BR> ENET_DMA->SCR &= ~ENET_SCR_SRESET; <BR><BR>

    If I set breakpoint at that line my JTAG fail. If I just execute this line i see no hardware action :( but register SCR changed.

    What kind of problem does we have?

    P.S. Related topics:

    http://www.st.com/mcu/forums-cat-5076-21.html

    Regards.

    Boris.

    [ This message was edited by: boris1 on 16-12-2008 13:50 ]

    [ This message was edited by: boris1 on 16-12-2008 13:51 ]

    Terms & ConditionsAccessibility statement