topic Re: imx28 BSP source code in i.MX Processors

imx28 BSP source code

FedericoSantann — Tue, 31 Jul 2012 07:01:21 GMT

Hi, All

I'm currently working with imx28evk and all works fine.

Now i'm developing my application specific board based on imx28. I'm looking for bsp files to modify UART's pins configuration but i haven't found them.

Where i can find those files? Someone can help me?

Thanks,

Best Regards

Federico Santanni.

Re: imx28 BSP source code

Rodrigue — Tue, 31 Jul 2012 07:52:19 GMT

Hi Frederico,

The Linux BSP Source code is located here:

http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=i.MX281&nodeId=018rH3ZrDRA24A&fpsp=1&tab=Design_Tools_Tab

in BSP tab.

Re: imx28 BSP source code

FedericoSantann — Tue, 31 Jul 2012 08:21:42 GMT

Hi Rodrigue,

thanks for your reply.

I've alredy downloaded L2.6.35_10.12.01_SDK_source_bundle.tar.gz. It's my fault, i've not specified that i've alredy rebuild all for the evk board.

The problem is that in my own board i want to use all UART (not only the 4 configured in evk board), but in the source code i have some difficult to find the files where to configure pins for UART (and to enable all the UART).

Federico

Re: imx28 BSP source code

Rodrigue — Tue, 31 Jul 2012 11:55:27 GMT

ok, no problem, then in this case please go to the kernel code:

linux/arm/configs/ to get inspired from the evk board.

Then, keep in mind that all 5 UARTs are not available all at the same time. AUART0_CTS/RTS cannot be configured with AUART4_RX/TX.

When selected in your config files, the IOMUX will be automatically correctly selected when compiling.

Check arch/arm/mach-mx28/serial.c

Re: imx28 BSP source code

FedericoSantann — Tue, 31 Jul 2012 13:23:12 GMT

Hi,

i've found in /home/federico/imx28/ltib/rpm/BUILD/linux/arch/arm/configs/ imx28evk_defconfig file. Here i see that i can enable or disable the UART. So i have to modify this file?

But if i want to configure AUART4 as RX/TX or i want to to set the correct pins,where i can find these info?

In /home/federico/imx28/ltib/rpm/BUILD/linux/arch/arm/mach-mx28/regs-pinctrl.h i 've found the pin configuration for UART but it seem that this file "is created by xml file" (as is written inside). I have to modify some other file before to build ltib to set my hw configuration?

Thanks,

Federico

Re: imx28 BSP source code

DennyvanLeersum — Tue, 31 Jul 2012 13:46:04 GMT

Hi,

I think you are looking for the mx28evk_pins.c file in the arch/arm/mach-mx28 dir. Here you can set what pin function should be enabled for each pin in the mx28evk_fixed_pins array.

It is probably best if you make an implementation for your own board based on this file.

Regards,

Denny

Re: imx28 BSP source code

FedericoSantann — Tue, 31 Jul 2012 14:07:56 GMT

Hi,

ok, i've found what i looking for.

I've supposed to search for these configurations in files in opt/freescale folder.

Thanks to all for help.

Federico

Re: imx28 BSP source code

spearson — Tue, 31 Jul 2012 17:44:43 GMT

Take a look at the i.MX_Linux_BSP_RM.pdf file for a good introduction into the Machine Specific Layer (MSL).

Re: imx28 BSP source code

YS — Wed, 01 Aug 2012 16:38:37 GMT

Federico,

Freescale uploaded patches for BSP iMX28-SDK-2010.12.

http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=IMX28_SW

Linux patches for i.MX28 SDK 2010.12

In this patches, 0577 is especially important if you want to use all UART ports on iMX28.

/dev/ttySP4 (UART4) does not work without this patch because of resource description mistake.

Re: imx28 BSP source code

FedericoSantann — Thu, 02 Aug 2012 08:23:19 GMT

Ok, i've read the pdf file (thanks Simon) and i'm appling the patches (thanks Yuji).

I don't know if i do it in the right way: i've added alle the patches to rppm/BUILD/patches folder and i've updated localversion file (in the same folder). After that if i launch ./ltib nothings happens so i've launched ltib with --m distclean param and after i've launched ltib. Is it correct?

Thanks to all again, i really appreciate your help.

This is first time i use imx processors so there are a lot of things i have to learn.

Federico

Re: imx28 BSP source code

FedericoSantann — Thu, 02 Aug 2012 12:09:50 GMT

Resolved.

Thanks to all.

Federico