LPC MicrocontrollersのトピックRe: LPC54102 timer PWM

LPC54102 timer PWM

skanda19 — Thu, 14 Sep 2023 21:24:03 GMT

Hello,

I am currently working on trying to get an 2 PWM output signals with different frequency with the LPC54102.

The SCT right now is able to output one signal, but I am trying to do the same with the CB32Tx peripheral. I couldn't get around any example codes on how to do it, I was wondering if you guys have any material I could use???? is this application achievable????

thanks,

Ricardo B.

Re: LPC54102 timer PWM

xiangjun_rong — Fri, 15 Sep 2023 01:57:27 GMT

Hi,

Pls download SDK package from the website for LPC54102-EVK:

https://mcuxpresso.nxp.com/en/welcome

and refer to PWM example based on CTimer.

Hope it is helpful

XiangJun Rong

Re: LPC54102 timer PWM

skanda19 — Tue, 19 Sep 2023 22:28:34 GMT

Hello Xiangjun,

I was able to output the signals needed from the CB32T0 and CB32T1 (both 512Hz signals with 45% of duty cycle).

At this time, I have one more question. I need to invert the signals between each other. While Timer0 is outputting a high, I need Timer1 to output a low state. Is there a way to accomplish this????

thanks again.

Re: LPC54102 timer PWM

xiangjun_rong — Wed, 20 Sep 2023 01:23:47 GMT

Hi,

Regarding your question, it is impossible to generate a pair of complementary PWM signals with CB32Tx, the PWM signal with CB32Tx always outputs low at start, and outputs high when a match happens, furthermore, it does not has the feature to invert the output signal.

Hope it can help you

XiangJun Rong

Re: LPC54102 timer PWM

skanda19 — Wed, 20 Sep 2023 15:53:20 GMT

what about the SCT ? is the SCT block capable ???

Re: LPC54102 timer PWM

xiangjun_rong — Thu, 21 Sep 2023 02:19:56 GMT

Hi,

Of course, the SCT module can generate pair of complementary PWM signals with/without dead time insertion.

Pls refer to section 9. PWM with deadtime in the AN11538.pdf

Hope it cab help you

XiangJun Rong

Re: LPC54102 timer PWM

skanda19 — Thu, 28 Sep 2023 20:22:02 GMT

Thanks for your help, I was able to setup the sct to get the 2 complementary signals.

thanks for your help Xiangjun!