TMS320F280048-Q1: How to configure CMPSS Comparator in latch mode

Emma Wang

Hi expert,

My customer wants to configure CMPSS Comparator into latch mode.

Because they want to make CTRIPOUTH or CTRIPOUTL connecting to an external IPM module, the overcurrent is just in a flash, but the output signal of the comparator is not expected to disappear.

I did not find the function, could you kindly tell me which one can achieve this function. customer is using driverlib.

Emma

over 3 years ago

0 Frank Ankapong over 3 years ago

TI__Mastermind 28275 points

Hi Emma,

You can configure this using the COMPCTL.CTRIPOUTLSEL and COMPCTL.CTRIPOUTHSEL registers. The latch option is 3.

0 Emma Wang over 3 years ago in reply to Frank Ankapong

TI__Expert 4830 points

Frank,

If customer wants to use driverlib, does it OK to do below:

add new value 'CMPSS_TRIP_LATCH' in function CMPSS_configOutputsHigh()， do we need to make other changes?

or could you kindly give me a reference code to achieve this function?

Emma

0 Frank Ankapong over 3 years ago in reply to Emma Wang

TI__Mastermind 28275 points

Emma,

Yes that is right. However if the output xbar trip is what you need, then use the corresponding 'CMPSS_TRIPOUT_LATCH' macro instead.

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TMS320F280048-Q1: How to configure CMPSS Comparator in latch mode