Recent content by mariocaptain

Thanks so much for the link. I found a work-around there and will try it.

It happens in Teensyduino 1.44 too. I have reported a bug in the Audio lib repo.

This is my code: #include <Audio.h> #include <Wire.h> #include <SPI.h> #include <SD.h> #include <SerialFlash.h> // GUItool: begin automatically generated code AudioPlaySdWav playSdWav1; //xy=343.00000381469727,3690.2000064849854 AudioOutputAnalogStereo dacs1...

P.S. I am sorry I could not use code tag because I am accessing the site from Vietnam, and for whatever reason I am not sure, this forum bans access from Vietnam, so I am accessing through a web proxy. Hope they will lift the ban

I have the same problem here. I am really surprised that not many people report this. I am using Teensy 3.5 and want to play a WAV file from the built-in SD slot based on the WavFilePlayer example, but SD.begin(BUILTIN_SDCARD) freezes. After lots of debugging, I found out that as long as...

Teensy is much quicker, that's what I suspected too. I tried running the Teensy at 24MHz to no avail. The amount of glitch is the same. Wish I had a scope to see the signal. Its a sensor that is based off the TCRT5000 that I bought from Aliexpress. Can't seem to find the rise time in the...

Hi all, I have been trying to use 2 difference kind of IR sensors with Teensy (3.2 and 3.5) ISR to no avail as it bounces a lot. One IR sensor is in a coin acceptor which I have tested and is working fine with Arduino. The other kind is a general obstacle avoidance IR sensor, newly bought; I...

My bad. Will keep that in mind next time! Thanks!

You are right! About the oscilloscope, right its still the same one, I am still saving up for a professional scope, but anyway in this case I strongly believe that its not the scope that is the culprit. Following tni's advice, I have been able to measure the clock cycles of every functions, and...

Very encouraging. I will try along this direction and update. I tried uncommenting the cli() & sei() and it's the same. Also the duty cycle stay constantly at 74% suggesting there is no nesting interrupt? I take it that you advise to run above 96MHz in any case, like 120MHz, 144Mhz?

Thanks. I will keep that as the last resort, since there are a total of like more than a thousand lines of code to put in ISR right now.

Thanks, makes sense to me. Regarding overclocking, the term "overclocking" just make me nervous. Will try to run at 120MHz. How to "put code and constants into RAM"? I still have lots of RAM available. Would like to try and see the difference. Update: I have just tried running at 120MHz and the...

Hi all, I am running 9 functions inside an Interrupt Service Routine (ISR) which is triggered 140 times/second (i.e. 140Hz) on a Teensy 3.1. These functions have to do with calculating variables and parameters and don't have anything to do with peripherals. I am turning pin 0 on an off in order...

Wow, I just can't thank you enough for taking all the time to share and to prepare those photos. Now I believe that it's should be my crappy scope and not the teensy. Will learn a bit more about scopes and maybe I will get a good one to try again! Thanks again for sharing the knowledge.

It's not really jittering, just jump back and forth between two values. My usb oscilloscope allows only a sampling rate of 1Mhz with a bandwidth of 20Mhz. It's this one.