Getting started with PWM on nRF52

RE: Getting started with PWM on nRF52

guraaf — Thu, 14 Jul 2016 17:01:16 GMT

Yes, I got further along yesterday. I will close the question. I made a mistake. The COUNTERTOP was 1600 while the compare decoder value was 0x800 so that is larger than countertop and the PWM never triggered.

RE: Getting started with PWM on nRF52

tesc — Thu, 14 Jul 2016 08:01:39 GMT

Hi, and sorry for the long wait. Have you gotten any further or shall I have a look at the code?

RE: Getting started with PWM on nRF52

guraaf — Fri, 08 Jul 2016 23:33:32 GMT

Thanks Terje. I took a look at the PWM Driver and the example. They are very helpful and I get the high-level idea now. However, there is still a lot of code in there - the driver library pulls in lots of header files for typedefs etc. that we don't plan to use for various reasons.

I am hoping to use a simple HAL-based PWM itself. The PWM driver has support for complex sequences and use of interrupts to handle tasks when sequences playback is completed.

I understand this is my work and not someone else's but was hoping if you can help identify what is missing in the following code. I don't get any signal output.

I updated the code in my original post. What am I doing wrong?

RE: Getting started with PWM on nRF52

tesc — Fri, 08 Jul 2016 14:02:17 GMT

Hi,

You are correct that the nRF52 series has PWM hardware. Have a look at the PWM Driver and the PWM Driver Example (not to be confused with the PWM Library, which uses a timer, ppi and GPIO.)

Regards, Terje