EMIFA0 on OMAP-L138 from ARM9 not working

Armin Inauen1

Other Parts Discussed in Thread: OMAPL138

I have a SMSC LAN9220 with SRAM like interface connected to the EMIFA.

Now I try to initialize the EMIFA0 settings with the GEL files. But if I connect the the ARM processor using CCS I read for any register in EMIFA0ARM always 0x0000000. setting any values don't work. Reading from the CS3 memory area (0x62000000) doesn't set the CS3 pin.

If I connect to the DSP C674x I can read register within EMIFA0DSP with good values and I can also change them. Reading from the CS3 memory area (0x62000000) does set CS3 pin.

I'd like the communicate to the LAN9220 from within the ARM CPU. What am I doing wrong? Or can't EMIFA be uesd by the ARM CPU?

regards

Armin

over 12 years ago

0 David (ASIC) Liu over 12 years ago

TI__Guru**** 177241 points

Armin

Did you program the PLL, PSC and PINMUX for the EMIF inteface?

Can you access the EMIFA register from the DSP core?

Thanks

David

0 Armin Inauen over 12 years ago in reply to David (ASIC) Liu

Intellectual 450 points

David,

yes, I programed PLL, PSC and PINMUX ans I can access the EMIFA from DSP.

Armin

0 David (ASIC) Liu over 12 years ago in reply to Armin Inauen

TI__Guru**** 177241 points

Armin

Are you accessing the register using the CCS register window? Is the program still running while you access the register? If you can access the OMAPL138 EMIFA register using DSP, then you should able to access the register using ARM as well.

Thanks

David

0 Armin Inauen1 over 12 years ago in reply to David (ASIC) Liu

Prodigy 185 points

Hi David,

there is no program running. Just connect to the target and configure with the GEL file.

Now accessing the registers in the CCS register window is functioning while connected to the DSP, but not while connected to the ARM.

Thanks

Armin

0 Armin Inauen1 over 12 years ago in reply to Armin Inauen1

Prodigy 185 points

Hi all,

it seemed to be a GEL file DDR2 settings problem. After setting those registers right, I also could access the EMIFA0 registers and even communicate with my LAN9220 chip.

Thanks to all

Armin

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EMIFA0 on OMAP-L138 from ARM9 not working