topic Re: imx35 - SDRAM in i.MX Processors

imx35 - SDRAM

Aditya1z — Tue, 03 Jan 2012 17:32:32 GMT

Hi guys,

I am using the imx35 in a project. Here is the problem i am facing:

The board returns an error - data error / prefetch error whenever the bootloader is being started from the SDRAM. i suspect the timings and register configurations in the SDRAM used and imx35 are not matching.

If this is not the case please diagnose the problem and help me with a solution. It is quite urgent.

Thanks & Regards,

Aditya

Re: imx35 - SDRAM

JerryFan — Wed, 04 Jan 2012 05:49:43 GMT

Please write some words and read them back to verify the SDRAM works or not. And the verifying image should run in internal RAM.

Best Regards

Jerry

Re: imx35 - SDRAM

Aditya1z — Wed, 04 Jan 2012 17:48:41 GMT

Thanks Jerry..

Here are a few more specifics.

I have used Barebox bootloader and written it to the sdram. It writes perfectly from the address i have given - 0x8000000

However when i try to execute it, it starts reading from the sdram and gives an error.

I am gettting - " onchip stopped" and "execution vector" error messages. And the bootloader which i copied to sdram doesnt exist at 0x80000000 address but instead appears to be at 0x8f7------

Please help me out in this regard.

Thannks & Regards,

Aditya

Re: imx35 - SDRAM

JerryFan — Thu, 05 Jan 2012 01:41:53 GMT

Hi Aditya,

I am a lit bit lost. You said that the bootloader "It writes perfectly from the address i have given - 0x8000000", but when executed, it "doesnt exist at 0x80000000 address but instead appears to be at 0x8f7------". It's strange.

My suggestion is :run a simple program in the internal ram instead of the SDRAM to verify the SDRAM.

Re: imx35 - SDRAM

Aditya1z — Thu, 05 Jan 2012 18:00:02 GMT

Sorry Jerry, my bad :-(

I have phrased the above sentence poorly and hence it appears very confusing. Will post a proper query soon with sufficent data backing it up.

Thanks,

Aditya

P.S - In the meanwhile do you know how to Interface an OV560 LCD panel to an imx35 kit which has a personality board ?

I have built the appropriate test applications using Barebox. How do I run these test application binaries ? That is, I need an explicit method of copying the binaries to board and running them.

P.P.S - To be simpler, I need to get some video displayed on the LCD after being processed by imx35 chipset. The video source is a PAL/NTSC DVD player.