Is it possible to phase shift two PWM signals 90 degrees, without using delays?

I had thought about this a few days ago, in some context that might sound very idiotic, But i think, if we have 2 separate microcontrollers, or arduinos, communicating through serial or through some other interface like I2C, we can have a phase shift between the PWM signals. I havent actually tri…

I havent actually tried doing this, and i just think this might work No way can you make that work. As the PWM is based on the timers if you take two timers and set them to run at the same frequency then it might be possible. However setting the initial offset could be tricky.

I succeed. In datasheet: . Set two PWM signals: First PWM channel CALG = 0 (left aligned) with freqA (running on CLKA) Second PWM channel CALG =1 (center aligned) with freqB (running on CLKB) The center aligned period is twice as long as the left aligned. If we take freqB = freqA *2 we get a pha…

The SAM also has a PWM engine that will (I think) produce synced waveforms out of phase. As I understand it any PWMLx and PWMHx pair will do this but it's not supported by the Arduino libraries so you'll have to cut your own driver code. Rob

Note: This works a duty cycle of 50% only ( I use it to generate encoder pulses). Yes it is easy to do things when you do not do them correctly or only approximate what is being asked for.

Psudeo code for 90deg shift Start up: Select Timer0 Source N = counts per half cycle Timer0 = 0; Timer0 Max = (180 * N) -1; Timer0 CompareA = (90 * N) -1; Timer0 Set Interupts= { CompareA, Max } Set Pin A Low; Set Pin B Low; Start Timer0; Interrupt: If(Interrupt == CompareA) To…

Phase shifting PWM outputs is entirely possible. You can even get high resolution phase control, especially when generating low frequencies. I also think the PWM engine with its complementary pairs is best suited and probably required for this type of application. Its possible to use just one sine …

Thanks for your reply I cant get it work at ma Arduino Due board. Is ist compatible to Arduino Due Another question how can I can get the phase shift 120 degree not 90? @ dlloyd or mlosuper Can you please post the entire code you made ? Thanks in Advance

Complete code for phase shift of 0°, 90°, 180° and 270° can be found here: http://forum.arduino.cc/index.php?topic=291435.msg3096824#msg3096824 And yes, its for Arduino Due only, as can be seen by "84MHz" in code comment of post #8 in this thread. I have not seen anything on phase shift 120°, not…

Phase shift PWM signals

Official Hardware Mega Due

system March 12, 2014, 4:59pm 7

I need not only 2 PWM phase shifted but 3 PWM signals 120 phase shifted to each other.. how can i adapt it ?

Topic		Replies	Views
2 shifted PWM using Arduino programming Programming	32	1124	March 8, 2024
PWM Phase shift Due	21	21489	August 7, 2020
Arduino DUE phase shift Due	11	1207	July 25, 2022
Generating two PWM signals with 50% duty cycle, variable frequency and one signal is 30 degrees phase shifted with another Programming	18	2011	December 3, 2022
Phase shift between 2 PWM General Guidance	16	632	May 1, 2024

Phase shift PWM signals

Related topics