How to invert TIMER signal?

[Endika Caño de Miguel]

Posted on October 30, 2017 at 11:45

Hello everybody:

I�m running my STM32L432  Timer 2 as a PWM and I need to take out from a pin the signal and same one inverted, but I don�t know how to do it. Any help would mean the world to me

I need something like the photo.

Thank you in advance.

#invert #signal #output #pwm #timer #stm32l4

[RomainR.]

Posted on October 30, 2017 at 13:57

Hello,

TIMER2 is a General Purpose 32bit. But it doesn't contains inverted channel.

You should use TIMER1 or TIMER15 or 16. 

See chapter 26.4.12 Complementary outputs and dead-time insertion in reference manual.

[Endika Caño de Miguel]

Posted on October 31, 2017 at 10:01

Okey, thank you. I didn´t know about that

[RomainR.]

Posted on October 31, 2017 at 10:09

Hi,

Take a look at Timer AN 

http://www.st.com/content/ccc/resource/technical/document/application_note/group0/91/01/84/3f/7c/67/41/3f/DM00236305/files/DM00236305.pdf/jcr:content/translations/en.DM00236305.pdf

 

Regards

[waclawek.jan]

Posted on October 30, 2017 at 14:05

Use a second channel in the opposite PWM mode, i.e. if you used the first pin in PWM1 mode, use the other in PWM2 mode.

You'll need to change the CCR value for both pins/channels simultaneously.

JW

[Endika Caño de Miguel]

Posted on October 31, 2017 at 10:02

thank you