AM1808 access for EMIF-A

Hideki Ishihara

Hello.

I want to use the EMIF-A(async interface) on the AM1808 evm board(LOGIC ZOOM develop kit).

I will connect a FPGA to EMIF-A.

SDK Version is ti-sdk-am180x-evm-05.03.02.00-Linux-x86-Install.

I used a /dev/mem, mmap and ioremap on the linux.

I can't access the EMIF-A.

I can access for the EMIF-A from u-boot.

Should be I rebuild linux kernel for the EMIF-A?

If I need to rebuild,

Please, how to setting or config for EMIF-A access.

Best regards,

Hideki Ishihara.

over 13 years ago

0 usama yaseen over 12 years ago

Intellectual 355 points

Hi Hideki,

To use EMIF-A, u first need to set the appropriate pin mux settings. Its better to do that in u-boot or kernel, i did that in the kernel.

Add this to the end of function da850_evm_init() in which all pin-muxing is done in the ../kernel_source/..../board-da850-evm.c file:

// initialize emif pin mux
   ret = davinci_cfg_reg_list(da850_emif25_pins);
   if (ret)
       pr_warning("da850_evm_init: EMIF mux setup failed:"
                       " %d\n", ret);

Compile the kernel and and use the compiled binary (uImage) for booting am-1808

After the emif pin mux settings u might not be able to use sd-card (happened in my case) so u might have to boot from network instead of sd-card. To boot from network follow this guide.

Use this code for configuring and using emif.

Hope this helps!

Regards

Usama

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AM1808 access for EMIF-A