AM335X Starter Kit LCD not displaying

Seeley Pentecost

While attempting to configure the RTOS SDK I was having some trouble configuring a bootable SD card. At one point I inserted a blank SD card into the Starter Kit and attempted to boot just so I had a benchmark for what should happen if there is no bootable medium. The LCD screen displayed blank white so I shut the board down and unplugged the SD card.

Since then, I haven't been able to get any display on the LCD screen. I have attempted to boot using the provided Linux SD card and Android SD card as well as a tftpboot and nfs setup with the Linux SDK. The power light shows green and the lights on the Ethernet ports light up initially. Additionally, the setup.sh script from the Linux SDK recognizes that there is a Starter Kit attached but Minicom fails to connect after the device reboot. I haven't found a way to confirm whether or not the Starter Kit is actually booting at all.

I'm using a Ubuntu 14.04 host with v2.00.01.07 of the SDK.

Does this sound like a hardware issue or is there a software intricacy that I am missing?

over 9 years ago

0 Biser Gatchev-XID over 9 years ago

TI__Guru**** 393215 points

Hi,

I will ask the RTOS team to comment.

0 Seeley Pentecost over 9 years ago

Prodigy 80 points

Still waiting for a response but I managed to get some more info through a serial connection with different boot sources. Using the card created by the ti-processor-Linux-SDK I get:

Using the Starter Kit Test binaries on a bootable USB, I get:

0 Yordan Kovachev over 9 years ago in reply to Seeley Pentecost

TI__Guru**** 161600 points

Hi,

Sorry for the delayed response.

I am not familiar with the RTOS SDK, so I will comment on the linux SDK log.

Your error comes from drivers/usb/musb-new/musb_core.c look at musb_init_controller() function, specifically in the following lines:
musb->isr = generic_interrupt;
status = musb_platform_init(musb);
if (status < 0)
goto fail1;
The sw cannot initialize the platform usb settings.
I suggest adding some debug prints to see if prcm (clocks) & pinmux settings for the usb controller are done.

This could also be a hw issue on your starter kit.

Best Regards,
Yordan

0 Seeley Pentecost over 9 years ago in reply to Yordan Kovachev

Prodigy 80 points

I've attempted some debug prints but haven't been successful in acquiring meaningful information. Is there a way to reset the device to factory settings?

0 Seeley Pentecost over 9 years ago in reply to Yordan Kovachev

Prodigy 80 points

I'm able to make an XDS100v2 connection with the on-board probe. Unfortunately, I'm not familiar with using JTAG emulators so most of what I'm seeing is pretty foreign. If this is a hardware issue, what can I do to begin down the RMA path?

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AM335X Starter Kit LCD not displaying