[SOLVED] How to Reverse PWM Signal?

[mvliege]

Hi all,

I have a project that it needs pwm signal which is reverse.

I have used PIC18F46K22 and ccs c programmer.

I mean that two different pwm signal should be reverse or symmetry.

Could you please help me? or could you please give me some value advice?

The signals should look as this picture below;

 

[paulfjujo]

hello,


just read datasheet in details ...

14.4 PWM (Enhanced Mode)
The enhanced PWM function described in this section is
available for CCP modules ECCP1, ECCP2 and
ECCP3, with any differences between modules noted.
The enhanced PWM mode generates a Pulse-Width
Modulation (PWM) signal on up to four different output
pins with up to ten bits of resolution

 

[milan.rajik]

Try getting PWM signal fro CCP1 pin and also get inverted PWM by connecting NOT gate to CCP1 pin. See if it works.

 

[mvliege]

Thank you for kind message milan,
But I don't want to use any gate due to cost increase and harmonics. And also I want to change both amplitude and frequency as changing PWM code.