F2812，register Fcompoe will be set to 0 when running program,PWM1-6 closed(No PDPINTA interrupt)!please

Hi,

According to SPRA647 - Power drive protection interrupt doc:

 

Principle of Operation
The PDPINT is typically connected to a current/voltage sensor or a temperature sensor to check
for abnormalities in the system. Whenever the PDPINT interrupt is asserted (by an external
active-low signal), the FCOMPOE bit in COMCON register changes to zero. This action puts the
PWM outputs in a high impedance state. To enable the PWM outputs again, this bit must be
changed to one. The PWM outputs can also be forced into a high impedance state by the user
writing a zero to the FCOMPOE bit. Therefore, there are two ways to put the PWM outputs into
high impedance. PDPINT has a clock independent path. This means that the PWM channels are
put in the high impedance state the moment PDPINT is taken low and remains in this state as
long as PDPINT is maintained low

Regards,

Gautam

Hi.Gautam

Thanks for your attention.

Part of my program is as follows:

GpioMuxRegs.GPDMUX.bit.T1CTRIP_PDPA_GPIOD0=0;// Set the Pin T1CTRIP_PDPA_GPIOD0 to be GPIO

EALLOW;

EvaRegs.EVAIMRA.bit.PDPINTA = 0;// PDPINT interrupt is masked

EDIS;

......

I think the possible cause from PDPINT has been been excluded. 

It seems to be something else happened that result in writting a zero to the FCOMPOE.

I wish it not to be caused by EMI.

Naah... Jason, EMI should not be the issue. Do you observe any heavy ground noise? 

Regards,

Gautam