PROCESSOR-SDK-AM335X: SPI NOR flash boot

Mbed MProg

Prodigy 20 points

Part Number: PROCESSOR-SDK-AM335X

Hello

i want boot U-boot from SPI flash (nor w25q64) on Beaglebone Green Wireless (based on BBB).

we Compile U-boot with am335x_evm_defconfig (and move MLO and u-boot.img to SD-card Flash).

when using "sf probe 0" command to init SPI0 and flash MLO.byteswap into SPI flash (W25Q64FV) U-boot shows:

SF: unrecognized JEDEC id bytes: ff, ff, ff
Failed to initialize SPI flash at 0:0.

How we can Solve this Problem.(we checked spi connection and it is correct )

Thanks

over 5 years ago

0 Biser Gatchev-XID over 5 years ago

TI__Guru**** 393215 points

Hi,

First thing you should check is the SPI_CLK pinmux. Refer to the note below Table 24-4 in the AM335x TRM Rev. P for details.

0 Mbed MProg over 5 years ago in reply to Biser Gatchev-XID

Prodigy 20 points

Thanks Biser

I check SPI0 pinmux and that is correct.

According to Table 24-4 and pinmux(Table 9-60) in U-Boot command I used md command and pinmux is correct.

=> md 44e10950 4

44e10950: 00000020 00000020 00000030 00000030 ... ...0...0...

Is the content of these registers incorrect?

0 RonB over 5 years ago in reply to Mbed MProg

TI__Mastermind 30276 points

Mbed,

What version of the SDK are you using? Thanks.

0 Mbed Mprog over 5 years ago in reply to RonB

Prodigy 10 points

Hello RonB

I using SDK-5.00 Version

ti-processor-sdk-linux-am335x-evm-05.00.00.15-Linux-x86-Install.bin

Best Regards, Mbed

0 RonB over 5 years ago in reply to Mbed Mprog

TI__Mastermind 30276 points

Could you please attach the DTS file you are using? I'm still concerned your SPI interface is not configured correctly. How did you validate it?

Thanks.

0 RonB over 5 years ago in reply to RonB

TI__Mastermind 30276 points

It looks like maybe you've moved past this issue, so I'm going to go ahead and close this post. Thanks.

Appendix: Similar issue was fixed here. Please, also check this thread.

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PROCESSOR-SDK-AM335X: SPI NOR flash boot