EVM C6670 MEMORY SECTIONS IN DDR3

Ricardo Martinez

Intellectual 290 points

Dear all,

I'm using EVMC6670. I'm configuring the board with evmc6670l.gel file.

I want to load memory sections into DDR3 instead of L2SRAM. So I create a new platform such as the following:

I rebuild my project and check that linker.cmd has been updated accordingly.

But when loading any application, it won't work (does not reach ENTRY_CODE _c_int00).

Moreover, in any configuration (including EVM6670 standard configuration), when I browse DDR3 contents with de memory browser, data seems to be unstable (changes with every single cycle).

So it seems that I have not configured DDR3 properly.

Could anyone point me to what I am missing? In other words, I want to execute applications from DDR3 instead of L2SRAM.

Thank you in advance.

Regards,

Ricardo

over 12 years ago

0 Chad Courtney over 12 years ago

TI__Mastermind 30825 points

Ricardo,

You need to configure the DDR interface before you can use it. Here's a thread on the subject http://e2e.ti.com/support/dsp/c6000_multi-core_dsps/f/439/t/245281.aspx

Best Regards,

Chad

0 Ricardo Martinez over 12 years ago in reply to Chad Courtney

Intellectual 290 points

Thanks Chad, you are right.

I thought you were not, because I'm loading evmc6670.gel file which should have done DDR3 configuration.

But not sure why (yet), when connecting to the target, gel file execution is going through this

if (DEVSTAT & 0x0000000E)

{

GEL_TextOut("No initialization performed since bootmode = %x \n",,,,,(DEVSTAT >> 1 ) & 0xF);

And it does not perform

Global_Default_Setup();

So DDR3 was not being initialized.

I don't understand this behaviour because my board is in "no boot" configuration (DEVSTAT & 0xE = 0)

Thank you very much.

Regars,

Ricardo

0 Ricardo Martinez over 12 years ago in reply to Ricardo Martinez

Intellectual 290 points

Ouch, sorry.

My board configuration (Switch 3) was wrong.

Obviously. Could not be anything else.

If board is in "no boot" configuration, DDR3 (and everything else) is properly configured by Global_Default_Setup() in GEL file by emulator.

If not using an emulator, DDR3 configuration has to be done in application code, as Chad stated above.

I'm very sorry for the noise

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EVM C6670 MEMORY SECTIONS IN DDR3