TMS320F280037: SCI-A boot mode configuration 2808 , 280037

Orvol Rencam

Part Number: TMS320F280037

Hi all,

In a process of switching over to a new MCU from F2808 to F280037.

To boot from SCI-A on F2808( SPRU722C, page 24, table 6.), the external controller pulls GPIO34 LOW which enables this.
Now, looking into implementing the same thing on 280037..
SPRSP61C - page 213, Table 7-8. shows different options based on state of GPIO24 and GPIO32. One of options is " SCI / Wait Boot⁽¹⁾".

It seems that configuration for 280037 ( or 28003x in general) has more options, as described in table 7-9. (BOOTPIN-CONFIG), 7-10.( Standalone Boot Mode Select Pin Decoding), 7-11. and 7.12.

If I don't want any customization and just want to use it in the same way as previously, can I just follow table 7-8. and pull GPIO24 low to enter SCI-A boot?

Also, I am not sure what Wait Boot is and is it default disabled?

Thank you.

over 1 year ago

0 Allison Nguyen over 1 year ago

TI__Mastermind 24070 points

Hi Orvol,

Yes, to use the SCI-A boot on F28003x in stand-alone mode (not emulation boot), you would simply set up the boot pins so that the device detects that you selected SCI/wait boot mode:

See the note (1) of the table above: The SCI boot mode is used as a wait boot mode as long as SCI continues to wait for an 'A' or 'a' during the SCI autobaud lock process. If you go to SCI boot and send nothing, SCI will wait indefinitely. This is why SCI doubles as wait boot as you can see in the TRM in the "Device Boot Modes" section.

If you send an invalid key, then it boots to flash. Hope this helps!

Best Regards,

Allison

0 Orvol Rencam over 1 year ago in reply to Allison Nguyen

Prodigy 40 points

Hi Alison,

Thank you for the reply!

Currently, I use C2prog to flash program over SCI. Where should this A/a come from if I was to use same programming pattern( using C2prog)?

Thank you.

+1 Allison Nguyen over 1 year ago in reply to Orvol Rencam

TI__Mastermind 24070 points

Hi Orvol,

Have you already been referencing https://c2prog.com/downloads/C2Prog_v2.0-Manual.pdf and https://c2prog.com/faq/? I am unfortunately not as familiar with the inner details of the C2prog tool, however, if you take a look at the user manual it shows autobaud is accounted for when using 2prog with the SCI bootloader. You can contact codeskin directly for further questions as well (info@codeskin.com).

Best Regards,

Allison

0 Orvol Rencam over 1 year ago in reply to Allison Nguyen

Prodigy 40 points

Hi Allison,

Thank you again for the reply. :)

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TMS320F280037: SCI-A boot mode configuration 2808 , 280037