Esp32 Timer Problem

[Oscar_T]

Hi

I can't compile the program. I found that if I remove the timer component the program compiles.

Kind regards

[LeighM]

Hi,
Looks like the Timer component is not yet compatible with ESP.
Can I suggest that you use a Timer Interrupt instead.
That can then call a macro/function that increments global variables to give you your timed events.

[Oscar_T]

Hi Leigh

Yes, now it's working!

Can you explain the timer period parameter (256 and 1000) what it refers to?

Now I have set 256 and seconds

Kind regards

[LeighM]

Glad you have it working
It's a generic drop box, but you can enter any value for the time period (time between interrupts), as you have found.

[Oscar_T]

Thanks Leigh

Now i've another question

I am trying to use the esp32 module to create a small test station. I need to generate a sine wave and I succeeded.

the problem is that the output is not stable and therefore every few seconds I find a glitch on the sinus. I tried to generate the wave in different ways but even putting it in the main loop I always have the same problem.

It almost seems that the output of the dac stops ...

[LeighM]

I think the problem here could be that ESP runs an RTOS.
That's not ideal for signal generation due to task scheduling.
I think that DMA might be possible, but I've not tried it.

[Oscar_T]

Do you think we can test for DMA channels?

[BenR]

Hello,

What are you using the output the sine wave, is it the internal DAC or PWM or is it via an external comms device?

[Oscar_T]

Hi Ben

Internal Dac!

Kind regards

[Oscar_T]

I have a strange problem with esp32 boards.

It looks like they are programmed but fail to boot ...

I have 3 boards (1 wroom-32 and 2 wroom-32d) and all three are doing the same joke

The version is esp32_devkitc_v4, clicking the two physical buttons nothing happens.