5509A Boot Table Byte Order

A.Wilson

Intellectual 520 points

I am using the following command to generate a Boot Table file:

hex55 -boot -v5510:2 -serial8 -b -o firmware.bin firmware.out

The code entry point address (from CCS/emulator) is 0x00026135

Examining firmware.bin I find this 32 bit entry point address stored as:

Byte 1 = 0x00 Byte 2 = 0x02 Byte 3 = 0x61 Byte 4 = 0x35

I am storing the boot table in a SPI connected microcontroller ( internal Flash) which is programmed to 'look' like a SPI EEPROM.

My first question is what order does the 5509A Bootloader wish to receive the above 4 bytes in? (SPRA375F doesn't make this clear - it talks about 32 bit address)

My second question is are the actual data bytes in firmware.bin in the order that the Bootloader wishes to receive them?

Regards, Andrew

over 15 years ago

0 Brad Griffis over 15 years ago

TI__Guru*** 125430 points

I went through this same procedure on the 5502. Here's a wiki page I wrote about it:

http://wiki.omap.com/index.php/SPI_Boot_on_5502_EVM

On the 5502 I wrote an application for burning the SPI flash. It simply took the generated bin file and wrote it into the SPI flash byte by byte. I'm 99% sure it's exactly the same on this device. So I believe that answers all your questions, i.e. the entry point and data bytes are in the exact order that they should be in the flash.

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5509A Boot Table Byte Order