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ETPS[INTPRD] = ET_3RD???

Naveen Rangu

Intellectual 600 points

Hi,

In the ePWM module i am not understanding this one

The interrupt-period (ETPS[INTPRD]) bits

specify the number of events required to cause an interrupt pulse to be generated. The choices available

are:

· Do not generate an interrupt.

· Generate an interrupt on every event

· Generate an interrupt on every second event

· Generate an interrupt on every third event

If i use ETPS [INTPRD] = ET_3RD;

what it means?

over 16 years ago

0 andreas von kaenel over 16 years ago

Genius 4925 points

Naveen,

Without checking the details, I would say it means that your interrupt will be generated on every third event. (ET_3RD). Pretty straight forward isn't it?

Best regards

Andreas

0 Naveen Rangu over 16 years ago in reply to andreas von kaenel

Intellectual 600 points

hi thank you ,

i am not understanding 3rd Event In the sense of what ? you said that interrupt generate on every third event .what is that third event ?

0 andreas von kaenel over 16 years ago in reply to Naveen Rangu

Genius 4925 points

It refers to the event trigger submodule of ePWM. The events can be time based counter events, counter compare events etc. Read the section about Event-Trigger Submodule of the ePWM Documentation

0 Lori Heustess over 16 years ago in reply to Naveen Rangu

TI__Guru* 93800 points

Naveen Rangu said:
i am not understanding 3rd Event In the sense of what ? you said that interrupt generate on every third event .what is that third event ?

Naveen,

I checked the ePWM reference guide for 2803x and the bit description indicates the event is defined by the ETSEL[INTSEL] bit field.

Where you looking at a different ePWM guide? If so please let me know so we can get the information added.