TMS320F28379D: Wrong information about SDFM result in 16-bit mode

Alex Guryanow

Part Number: TMS320F28379D
Other Parts Discussed in Thread: C2000WARE

There is an error in TRM for 379D (spruhm8i), comments for SDFM_getFilterData (sdfm.h) and respectivelly in driverlib documentation for the same function in C2000ware 3.04: when configured for 16 bit mode the result of filtering is in higher part of SDDATA1, not in lower.

See https://e2e.ti.com/support/microcontrollers/c2000-microcontrollers-group/c2000/f/c2000-microcontrollers-forum/906250/tms320f28379d-position-of-the-result-of-the-sdfm-filter-in-16-bit-mode

The sample from C2000Ware_3_04_00_00\driverlib\f2837xs\examples\cpu1\sdfm works fine - it shifts result right for 16 bits

Regards,
Alex

over 5 years ago

0 Gus Martinez over 5 years ago

TI__Mastermind 30531 points

Hello Alex,

It appears you are correct about this. Let me check with some other folks internally to confirm. I will get back to you in a couple of days.

+1 Gus Martinez over 5 years ago in reply to Gus Martinez

TI__Mastermind 30531 points

This is a confirmed literature bug. Your findings and the information provided in the E2E post you referenced is correct. An update will made to the TRM, but I don't have a timeline for when the change will be public. Thanks for reporting this issue!

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TMS320F28379D: Wrong information about SDFM result in 16-bit mode