PIC12 Complementary Output Generator...

1.0.0

Code example showing the usage of the Comparator, COG, and ADC modules in a PIC12F752 device. The main focus is generating 2 complementary outputs and using the Comparator output to insert a phase delay into the rising edge of the source PWM used as the time base for the 2 complementary outputs.

PIC12F752 ADC + Comparator + COG Demo

This demo uses the PIC12F752 to generate 2 complementary PWM outputs (i.e. same carrier frequency & duty cycle) using the

Complementary Output Generator (COG) module.

The COG outputs are based on a single PWM waveform (using Timer2 to create a ~300kHz carrier frequency, 50% duty cycle square wave)

with fixed dead-band delay for rising and falling edge events.

The Comparator is configured to operate in high-speed mode and generates interrupts on both rising and falling edges:

* Rising edge interrupt: When the (C1IN0+) input goes above the (C1IN-) input, a fixed phase delay will be inserted into the COG outputs.

* Falling edge interrupt: When the (C1IN0+) input goes below the (C1IN-) input, the phase delay will be removed.

COG Auto Shutdown Fault Input: Whenever the COG1FLT input goes low, the COG1 outputs will be shut off.

The internal weak pull-up is enabled on this pin.

The RA2 pin is configured as an A/D input (channel 2) and is continuously scanned during the main background processing loop.

NOTE: In order to debug this part using all of its I/O pins, use the PIC12F752-ICD Processor Extension Pak (Part No. AC244049)

To install PIC12 Complementary Output Generator (COG), download this extension and open it. It should install into Atmel Studio. Please make sure you have the necessary version of Atmel Studio installed in your PC.

Supported Products: MPLAB X

Release Notes

Initial release

Owners

Microchip

Authors

Microchip Technology

Dependencies

- No dependencies.

Version History

Version	Downloads	Last updated	Approved
PIC12 Complementa... 1.0.0 (this version)	192	Thursday, May 9, 2019	yes