TMS320F28379S: F28379x with BISS Interface

Ralf Koester

Part Number: TMS320F28379S

Hallo,

I wonder, if the implementation of BISS Interface is possible with other EPWx than those in the documentation SPRUI37 listed EPWM-3 and EPWM-4.

Can we change this or are these EPWMs fix?

Ralf

over 8 years ago

0 Subrahmanya over 8 years ago

TI__Mastermind 24095 points

Hi Ralf, Your understanding is correct. PWMs used are fixed in the library implementation. Only PWM4 is used.
Refer to the "Table 9. Resource Requirements" in SPRUI37.
The table indicates what resources are used, and of those what are configurable and what resources are dedicated for the implementation.

-Bharathi.

0 David Berthold over 8 years ago in reply to Subrahmanya

Prodigy 245 points

Hi,

in SPRUI37 on page 17 Chapter Steps for Initialization in Step 6 "Enable clocks to EPWM Instances" there must be EPWM3 enabled. But why when it is not used?

Best regards
David

0 Subrahmanya over 8 years ago in reply to David Berthold

TI__Mastermind 24095 points

David,

Clock enable is needed for EPWM3 - BISS implementation but it doesn't use up the EPWM3 module.
This is because BiSS implementation is done using CLB block and that requires the EPWM3 clock to be enabled (for certain shared logic) in this particular case.
So, only the clock enable is needed and the EPWM outputs are available for user.

-Bharathi.

0 David Berthold over 8 years ago in reply to Subrahmanya

Prodigy 245 points

Hi,

thank you for your answer.

David

0 David Berthold over 8 years ago in reply to David Berthold

Prodigy 245 points

Hi,

can we get the source-Code of the "PM_bissC_Lib.lib" to manualy change the EPWM-Modul (EPWM4 to EPWM8)

Thanks
David

0 Subrahmanya over 8 years ago in reply to David Berthold

TI__Mastermind 24095 points

David,

It's not possible to change the EPWM4 to EPWM8. We've CLB logic that ties to specific instances of EPWM.

-Bharathi.

0 David Berthold over 8 years ago in reply to Subrahmanya

Prodigy 245 points

Hi Bharathi,

what do you mean with CLB? Do you mean the ePWM X-BAR.

David

0 Subrahmanya over 8 years ago in reply to David Berthold

TI__Mastermind 24095 points

Hi David,

CLB (Configurable Logic Block) module is used in PositionManager libraries. Please refer to "1.4 BiSS-C Master Implementation Details". As explained in the doc, this block currently available to users via s/w libraries provided by TI only.

-Bharathi.

0 David Berthold over 8 years ago in reply to Subrahmanya

Prodigy 245 points

Hi Bharathi,

can i get the source-code of the library?
Thanks

David

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TMS320F28379S: F28379x with BISS Interface