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questions about boot AM1707 from NOR

zheng-xiaojun
Prodigy 10 points
Other Parts Discussed in Thread: AM1707

In our project, we want to boot from NOR flash, but the hardware is not ready. so we test it on the AM1707 EVM,

we finished sft_AM1707_NOR, and use it flash the ubl_spi.bin to NOR flash. (we use ubl_spi because ubl_nor.bin has not finished.)

and write 0x000000F0 to 0x60000000 as configuration word.

I think the boot sequence should like this:

1. RBL read ubl_spi.bin to 0x80000000 and run it

2. ubl_spi.bin will copy uboot (reside in SPI flash) to RAM and run it

3.uboot boot linux

but when i power on the EVM , nothing happened, and the uart terminal display nothing.

I have set the bootmode and BOOT_DEVICE switch on the right position.

can anybody give me some advice?

English is not my native language, hope you can understand what i say.

thank you!

  • 0
    TI__Mastermind 27585 points

    I think there is an issue with the config word. Bits 6-7 are reserved and must be set to 0.

    Also aside from the reserved bits, that config word sets the boot to Legacy Nor boot, which is a non-AIS boot mode, so the ubl_spi.bin will not be parsed correctly.

    Jeff