Migrating between Hercules and Sitara

Tobias Matschke

Hi there!

Is it possible to migrate projects (CCSv5) from Hercules to Sitara and vice versa?
What are the key differences between the R4 and A8 cores?
Is it possible to run assembler snippets from R4 on A8?

Any hints are appreciated.

over 11 years ago

0 Biser Gatchev-XID over 11 years ago

TI__Guru**** 393215 points

Hi Tobias,

What kind of software do you want to migrate? Barebone code, Linux?

0 Tobias Matschke over 11 years ago in reply to Biser Gatchev-XID

Prodigy 210 points

Hi Biser,

the project comprises mostly bare metal code. FreeRTOS running a soft plc. I am particularly unsure about register names and locations. Am I looking at a rewrite of all the hardware related modules or can I re-use parts of them?

Thanks for your help!

Regards....

0 Biser Gatchev-XID over 11 years ago in reply to Tobias Matschke

TI__Guru**** 393215 points

Hi Tobias,

A lot of rewriting will be needed probably. The AM335X is a complex processor, with MMU. You can take a look at the AM335X Starterware package, which provides an OS-less environment for this processor.

0 Tobias Matschke over 11 years ago in reply to Biser Gatchev-XID

Prodigy 210 points

Hi again!

Thanks so far..
How about the peripherals? Are they compatible? Can I re-use code for SPI, USART, DMA etc.?

Is there maybe a migration checklist, like the ones STMicro provides? They have tables where you can see which differences there are between the peripherals of two µC product groups, so I can estimate the effort we would have to put into a migration.

Regards...

0 Biser Gatchev-XID over 11 years ago in reply to Tobias Matschke

TI__Guru**** 393215 points

I haven't heard of a migration document from Hercules so far. There are migrating guides from other processors on the AM335X wiki: http://processors.wiki.ti.com/index.php/Sitara_AM335x_Portal

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Migrating between Hercules and Sitara