GPIO8 and ETHERNET incompat

ricardo2399 · ‎2008-12-16

Posted on December 16, 2008 at 09:05

ricardo2399 · ‎2011-05-17

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 canÂ´t see why!!

Did anyone already had this problem?

Thanks ppl :|

usatyj · ‎2011-05-17

Posted on May 17, 2011 at 09:55

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

dhoyen · ‎2011-05-17

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.

usatyj · ‎2011-05-17

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.

dhoyen · ‎2011-05-17

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

boris1 · ‎2011-05-17

Posted on May 17, 2011 at 09:55

I'm also have this problem!

I found that if I do like that:

Code:

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

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

Code:

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

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 ]