OMAP L138 LCDK Ethernet Controller Base Address Register Access Problem

Michael Manning

Hello,

I am trying to write to the Ethernet controller registers. However, I get a data abort when trying to do so. I am using SYS/BIOS and am executing the write from within a task. The address for the controller is correct, and the offset to the specific register is also correct so I assume this may be a MMU issue. However, when I try to pull in the MMU module using the configuration utility, it does not exist in the packages I have available, yet the source code, or at least the header files are there.

Is MMU the problem? or am I way off base?

Thanks in advance,

Mike

over 11 years ago

0 Titusrathinaraj Stalin over 11 years ago

TI__Guru** 116100 points

Hi,

Are you running any TI examples or own code?

Have you tried NDK examples from TI ?

Are you getting any exception errors?

Try to use "edit platform" option in "RTSC tools" and allocate memory for EMAC (ethernet)

http://e2e.ti.com/support/embedded/tirtos/f/355/p/200390/712854.aspx

0 Michael Manning over 11 years ago in reply to Titusrathinaraj Stalin

Prodigy 20 points

Hi,

Thanks for the info. I found the option to include MMU and resolved the issue. Essentially, MMU was included/ enabled by default but was "greyed out". I tried clicking on it a couple of times just for grins, and it took a few seconds, but when the window refreshed the option was available to change. So I opted "not" to include MMU, rebuild everything, and the memory where the controller lives is available, no exceptions / data aborts.

0 Titusrathinaraj Stalin over 11 years ago in reply to Michael Manning

TI__Guru** 116100 points

Hi Mike,

Sounds good.

Thanks for your update.

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OMAP L138 LCDK Ethernet Controller Base Address Register Access Problem