TMS320F28335: boot mode

lin hong

Prodigy 40 points

Part Number: TMS320F28335
Other Parts Discussed in Thread: C2000WARE

Tool/software:

If there is no external switch to select the mode, how can the selectionbootmode be set in the software?

over 1 year ago

0 Allison Nguyen over 1 year ago

TI__Mastermind 24430 points

Hello,

Are you using the F28335 ControlCard?

Please be sure to also review the TRM boot documentation. The boot pins should be pulled high or low to select the boot mode.

Best Regards,

Allison

0 lin hong over 1 year ago in reply to Allison Nguyen

Prodigy 40 points

The question I have is: who calls the SCI_BOOT function? Is it called by the boot ROM?

0 Allison Nguyen over 1 year ago in reply to lin hong

TI__Mastermind 24430 points

Hello Lin,

You are correct. When the device boots up, it will go through the boot ROM and check the status of the boot GPIOs to determine which boot mode is selected. Based upon this, it will call the desired boot function that will return the entry address it needs - i.e. SCI_Boot().

Note that the boot ROM and bootloader (such as SCI boot) sources are available in C2000Ware: C:\ti\c2000\C2000Ware_5_02_00_00\libraries\boot_rom\f2833x\v2_0\rom_sources\source. You can review the SelectBoot_Mode.c there for insight on these topics as well.

Best Regards,

Allison

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TMS320F28335: boot mode