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AM1808 NOR Boot

zcoban
Prodigy 90 points
Other Parts Discussed in Thread: AM1808, OMAPL138

Hi,

We have an AM1808 based evaluation board. We use the same mDDR with the one on LogicPD experimenter kit (AM1808 eXp Kit) and a 512 Mbit NOR flash connected to EMIFA CS2

interface. We imported amr-ubl project from PSP-SDK 03.00.20.11 to CCSV4 (this project is for OMAPL138). We configured the flash for 8-bit access. We did the necessary changes on

UBL project for NOR boot and 8-bit access to NOR flash. Now, when we boot with emulation mode, we can download arm-ubl.out to the board, run the application. The application does the

low level initialization and copies u-boot from 2nd sector of NOR flash (0x60020000) to external RAM (0xc1080000) and jumpes to 0xc1080000. After then we can see the uboot shell on

serial terminal.

Then we generated an ais file using AISGen Tool of TI and arm-ubl.out application and burned it to NOR flash base address (0x60000000). From memory view, we could see that the

configuration word at flash base address is 0x00000020, which says NOR_ais boot method, and 8-bit access to flash. But, when we try NOR boot, nothing happens.

What would be the possible causes of this situation? And what can we do to figure out what the problem is?

Thanks, Zafer.

 

  • 0
    TI__Mastermind 27585 points

    Can you paste the output of the debug GEL here? I think you also posted in another thread but lets continue on this new one from now on.

    Also after you try NOR boot and nothing happens, connect in CCS without a GEL file and look at the NOR address 0x60000000. Do you still read the 0x20 config word at that location?

    Jeff