I2C: Timed out in wait_for_bb: status=1000

pavan krishna

Other Parts Discussed in Thread: AM3352

Dear All,

We have beagle bone black based custom board which has AM3352 processor. We are using SDK-8. We had done one more time profiling for my board and after getting optimum values updated in the U-Boot source code. After compilation of u-boot, I have loaded MLO and u-boot.img to the board with the same kernel. But during u-boot boot we are seeing some I2C Timeout errors as below

**********************************************************************************

Boot Logs

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I2C:   Timed out in wait_for_bb: status=1000
Timed out in wait_for_bb: status=1000
ready
DRAM: 512 MiB
MMC:   OMAP SD/MMC: 0, OMAP SD/MMC: 1
Timed out in wait_for_bb: status=1000
Timed out in wait_for_bb: status=1000
Net:   <ethaddr> not set. Validating first E-fuse MAC
Phy not found
cpsw, usb_ether
Hit any key to stop autoboot: 0

Could you please provide me the solution and what it causing this error?

Thanks in advance,

over 9 years ago

0 Biser Gatchev-XID over 9 years ago

TI__Guru**** 393215 points

Hi,

Do you have an I2C EEPROM on your custom board? If not, you should remove the EEPROM related code from your SPL and u-boot.

0 pavan krishna over 9 years ago in reply to Biser Gatchev-XID

Expert 1010 points

Thank you for your reply,
Yes, we don't have EEPROM but we have commented all the code related EEPROM. It's working perfectly with original code base where we have default optimum values comes from default code base. I am fully blank, please give me any clues.

0 Yordan Kovachev over 9 years ago in reply to pavan krishna

TI__Guru**** 161600 points

Hi Pavan,

Have you checked if the pads are configured as I2C? It is possible to get these timeouts because you have the wrong pinmux settings, and if pullups are disabled.

Best Regards,
Yordan

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I2C: Timed out in wait_for_bb: status=1000