Search found 10 matches
- Wed Sep 05, 2018 7:15 pm
- Forum: General Discussion
- Topic: GPIO Interrupt Latency - once more
- Replies: 5
- Views: 9712
Re: GPIO Interrupt Latency - once more
[quote="mTron47"]Hi holopaul I could indeed resolve my problem using mcpwm. However my issue to resolve was on the output side. If I understand you correctly you are using the (hall-sensor) input of mcpwm and are seeing "funny things". I do not have any experience on that side - sorry.[/quote no, i'...
- Wed Sep 05, 2018 1:57 am
- Forum: General Discussion
- Topic: ESP32 MCPWM Input Capture Problem
- Replies: 7
- Views: 11858
Re: ESP32 MCPWM Input Capture Problem
Hi,
I think i'm getting the same results as you did. Have you find a solutions for this?
I think i'm getting the same results as you did. Have you find a solutions for this?
- Wed Sep 05, 2018 1:56 am
- Forum: General Discussion
- Topic: GPIO Interrupt Latency - once more
- Replies: 5
- Views: 9712
Re: GPIO Interrupt Latency - once more
Hi there!
Did you get any results capturing the input with mcpwm? I'm trying to capture a signal that is 60uS and had all kind of crazy/random results from this peripheral.
Did you get any results capturing the input with mcpwm? I'm trying to capture a signal that is 60uS and had all kind of crazy/random results from this peripheral.
- Tue Jul 03, 2018 5:37 pm
- Forum: General Discussion
- Topic: Very accurate timer implementation
- Replies: 11
- Views: 14782
Re: Very accurate timer implementation
@deouss, i need to capture a signal, not generate it. the problem is that the my signal is too long for the 15 bit timer resolution.
- Tue Jul 03, 2018 2:05 am
- Forum: General Discussion
- Topic: Very accurate timer implementation
- Replies: 11
- Views: 14782
Re: Very accurate timer implementation
Okay, i didn't know about this one, thanks. I'll give it a try. But isn't this based on regular intrerupts? The good thing is that the timer is 80Mhz. Have you tried it for capturing signals?
- Mon Jul 02, 2018 11:41 pm
- Forum: General Discussion
- Topic: Very accurate timer implementation
- Replies: 11
- Views: 14782
Re: Very accurate timer implementation
@WiFive, I'm afraid I don't quite follow you. Please explain. Also RMT is in RX mode. I cannot modify the signal. thanks
- Mon Jul 02, 2018 7:08 pm
- Forum: General Discussion
- Topic: Very accurate timer implementation
- Replies: 11
- Views: 14782
Re: Very accurate timer implementation
Hello, I did some reading about RMT and it looked too good to be true. And if i'm not mistaking, it is exactly that way. The main problem is the 16 (or 15) bit resolution. My signal train is exactly 8.3 ms(120 Hz) long. I really need the 12.5 ns (80MHz) granularity because the timebase of my signal ...
- Mon Jun 25, 2018 3:31 pm
- Forum: General Discussion
- Topic: Very accurate timer implementation
- Replies: 11
- Views: 14782
Re: Very accurate timer implementation
Gentlemen thank you for your time. This approach looks very promising and seems like i have some reading and testing to do.
- Mon Jun 25, 2018 1:45 am
- Forum: General Discussion
- Topic: Very accurate timer implementation
- Replies: 11
- Views: 14782
Re: Very accurate timer implementation
Hi kolban, Thanks you for answering my question. I will go with your call and get back with the results. I had some trouble with timer intrerupts given minimum prescaler value of 2 (80/2). Do you think using the I2s infrastructure DMA capable to read this signal would be another viable alternative? ...
- Sat Jun 23, 2018 3:15 am
- Forum: General Discussion
- Topic: Very accurate timer implementation
- Replies: 11
- Views: 14782
Very accurate timer implementation
Hi, I'm trying to detect some fast events. I have two signals from two sensors. The signal looks like this :HIGH 60-130 microseconds (us), LOW 0-2700 microseconds (us), HIGH 0-20 microseconds (us). I need to measure the length of each event as accurate as possible. What is the best approach? Thank y...