AM335x SK board and schematic revisions

David Jarrett1

I have an AM335x SK with board rev 1.1A, while the schematic rev on the website is 1.2B. Is it possible to get a schematic pdf for this older version? I'm having an issue with the wifi driver and suspect it must be because the connection and pinmuxing changed between rev 1.1A and 1.2B.

David

over 12 years ago

0 Biser Gatchev-XID over 12 years ago

TI__Guru**** 393215 points

Hi David,

Are you sure your board is 1.1A and not 1.2A?

0 ddomke over 12 years ago in reply to Biser Gatchev-XID

TI__Intellectual 2150 points

Yes, please check the version of the main board. The LCD carrier board has a different version than the main board. The schematic version is the version of the main board because the LCD carrier board does not have any components soldered to it. (It's just a platform to hold the LCD.)

0 David Jarrett1 over 12 years ago in reply to ddomke

Prodigy 80 points

No, I'm reading from the main board. Here's a picture, you can see the FTDI chip in the lower left corner.

0 Steve Schefter over 12 years ago

Expert 1780 points

Hi David.

I don't have schematics, but you are correct about a difference w.r.t. wifi. The IRQ used for wifi on the Rev1.1 board is GPIO0[31] while it's GPIO1[29] on the Rev 1.2 board. That needs to be changed in the arch/arm/mach-omap2 board file.

Regards,

Steve

0 David Jarrett1 over 12 years ago in reply to Steve Schefter

Prodigy 80 points

Great, thanks for the info. I'll update when/if I get this working.

David

0 David Jarrett1 over 12 years ago in reply to David Jarrett1

Prodigy 80 points

Actually, I'm still confused on this. The 1.2B SK schematic has WL_IRQ connected to GPIO0_31, and the current SK #define for the IRQ is set up this way also. Can you re-clarify what should be the case for the 1.1A SK schematic?

#define AM335XEVM_WLAN_IRQ_GPIO GPIO_TO_PIN(3, 17)
#define AM335XEVM_SK_WLAN_IRQ_GPIO GPIO_TO_PIN(0, 31)

David

0 Steve Schefter over 12 years ago in reply to David Jarrett1

Expert 1780 points

Hi David.

Sorry, I got those backwards. 31 is used on the 1.2 board while 29 is used on the 1.1 board.

Basically, you have to undo this patch:

https://github.com/Angstrom-distribution/meta-ti/blob/master/recipes-kernel/linux/linux-am335x-3.2.0-psp04.06.00.08/0001-am3358-sk-modified-WLAN-enable-and-irq-to-match-boar.patch

Regards,

Steve

0 David Jarrett1 over 12 years ago in reply to Steve Schefter

Prodigy 80 points

Thanks. This makes more sense and I made the changes, but I'm having another issue building the FS that I posted separately. I'll confirm this once that one is resolved.

David

0 David Jarrett1 over 12 years ago in reply to David Jarrett1

Prodigy 80 points

This worked just fine, thanks for the support!

David

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AM335x SK board and schematic revisions