Generally, I use something like this:
// wait up to 3 seconds for the Serial device to become available
while (!Serial && (millis () <= 3000))
;
This way if you are connected to the computer, it will...
the contact has a miniscule resistance which wont beep, you should be able to see the value though if your reading the ohms, like taking a resistor and trying to check if the voltmeter beeps :)
That is a 5V device - not enough detail there to see if it can run in 3.3V mode. That won't hurt the T_3.5 on digital pins, but having it see 3.3V from Teensy Tx as HIGH needs to be checked.
Wow XON/XOFF is decades...
Hi All,
I am currently working on what I initially thought was a simple project reading data from the RS232 port of a pH meter with a Teensy 3.5. The meter sends data at time intervals over RS232. The hardware setup...
An update for Teensy LC and 3.2 to add the 15 second button press and a couple other minor features is definitely on my todo list.
But he says he's got a Teensy 3.1. PJRC discontinued 3.1 years ago, and 3.0 was...
The previous programmer on this project is MIA. He did leave a bit of code behind, but it is missing files and will have to be cleaned up heavily to get it functional. Although I think the original binary might as well...
Thanks Frank, I'll wait for a bit to update to try the f_bus==128 to see it run at 64
The above linked sketch claims to be doing tuning - but it seems to be missing a key element in the searches as I've looked so...
Seems to be a USB problem in general.
How are your boot priorities set up in Bios?
How are your USB power settings in Bios?
Maybe some USB driver corpses cleanup might help.
Where does it hang|crash?
I also got...
Okay, i got my 74HC 4066 IC today.
I hooked it up and... it works!!
No more relays noise at all! Perfect!!!! The camera does focus and shoots!
I just have one last question:
First i tryd to measure if there...
Perhaps u could adjust the crystal load capacitors ?
See 28.8.1.1 OSC Control Register (OSC_CR) in the manual. Bits 0-3.
It's set here: https://github.com/FrankBoesing/cores/blob/FCPU-256MHz/teensy3/mk20dx128.c#L806...
Turns out it was a shitty board design. I got my columns and rows mixed up, therefore each were consolidated wrong at the cable ends. My very, very bad - and so sorry to have wasted your time. You guys rock.
THX for replies! OK so I tried code below and there is 3.2v when HIGH on pin 13 and 10, and both go to 0 when LOW. HIGH on OUTPUT_OPENDRAIN does not seem to create an isolated pin (is there a MEDIUM?). Both pins will...
Seems to actually be running at the advanced speed! Seeing 255,997,016 cpu cycles per second. No issues on multiple compiles and uploads.
I found a sketch that adjusts the RTC, and since I have the GPS with PPS on...
The plot thickens,
I used the J-Link on the MK20's serial wire debug lines to preform a mass erase --which was successful, and thereafter, flash my bootloader.hex file onto the MK20, which was also successful. I can...
Well, I'd say that after having developed your program, the final goal would be indeed having it run without being attached to a computer.
As vjmuzik pointed out, just be sure you don't have calls to "Serial" in your...
When I convert to int in the println, it shows 36, then 38, then 40, but only if I also define the array as int.
If I define the array as char and convert to int in the println, it shows 36, 44, 52, etc.
When I convert the char values to an int in the printlns and leave it char in the array def, they're separated by 4 digits so the output becomes 36, 40, 44...
When I define the array as int and also convert to int in...
Simple prints like this will show the results:
char foo = '65';
Serial.println( '65' );
Serial.println( 65 );
Serial.println( foo );
foo = 65;
Serial.println( foo );
Serial.println( (int)foo );
Thats correct. The asc-ii value for "$" is 36.
If you want it "human-readable", rethink your println.. you tell it to print a char. And that's what you get:)
hint: you want to print an "int", not a "char".
Sorry, should have also stated that removing the single quotes results in an ASCII representation of the numbers. So, the output looks like:
ON
$
OFF
$
ON
,
OFF
,
The test of prior code I ran is up to 'Restart Sequence 1201' with testing and no GOTCHA as it was written.
@microderm: Without the .end() - there won't be any change in the prior behavior should it occur. Only the...
Hi,
this are only small SMD-LEDs. I dont know the type but i think each needs not more than 2-3mA.
Its a good question for the noise.
I did recordings in a silence room, with and without Mic (only disconnected,...
https://github.com/FrankBoesing/cores/tree/FCPU-256MHz
If you want to try it (please!), download the core and overwrite your local files.
Some libraries need updates, but the needed changes to the core are done....
Yes, my dipping (in and out at wrong speed) code (#55) is running well too. That code does not use the .end() command, so it appears not to need an explicit call to .end().
Loop 350 and counting...
Perfection!...
It depends on if and how the code has been written to set or not a few protection flags in the corresponding registers. Thus, it might be readable or it may not. But then, we are probably into copyright and/or forensic...
Good.
The .end with timing then .begin is good and right in your sketch. I hacked the .begin calling .end and that wasn't right as posted :(
<edit>: And with that change going back to the ::...
I've committed the fix on github. The fix will be in Teensyduino 1.45 later this year.
https://github.com/PaulStoffregen/cores/commit/c425ecbd0a529b14bc05664bf96d5c0e9413825e
A mux will have a supply voltage range and if your peaks are not wildly outside of that (since it's a low impedence transient) it's very unlikely to fry the mux. (Even if you're only powered at 3.3v.)
But I'm not an...
How many WS2812's on that strip? 5v is correct, but you may need several amps from a separate power supply. Make sure LED strip and teensy grounds are common.
Also, temporarily modify your code to use only 5 LEDs,...
Paul: I get the same output on the unfixed system. The new code runs nicely without problems.
I'll now test my more recent build to see whether .end() or just .begin() are sufficient etc.
I am currently connected via USB. Really, I would just like to know if this is something that is at all possible. I would not need to do anything with the binary other than re-upload it potentially.
You might need a 3.3V to 5V level shifter between Teensy and the LED strip. Some strips can accept 3.3V signals. Others are more picky and only work with 5V signals. Some of those strips will work with 3.3V if you...
Hi guys!
So I used to have a Arduino Mega which controlled a 5m long WS2812b strip, but because of performance issues I decided to get a Teensy 3.5.
It always used to work perfectly fine with my Arduino, but when...
Ah sorry Oddson, the USB host 5v... I completely overlooked that on my reference card. My (basic) mistake! Thanks.
I’ve done a lot of searching in regards to protection on every input PRE mux or one set POST mux...
Hi , i have a little problem with my teensy 3.5, i am a newbie and i am learning arduino. I wrote a program with my teensy for using it as a joystick for x-plane 11 and it works very well ! (thanks to the developpers of...
Is there a way to configure a Teensy 3.2 A/D 'x' pin to become a switchable ground without adding an external transistor (ex 3904)?
For example:
If I have a sound board that needs pin x grounded to trigger a...
Up and running … Loop 150 and counting.
Cool - I made note of that.
Question - I didn't look at changed code - does a .begin after a .begin do any clearing with no .end in between when the port was already setup...
Ok, here's a fix. Copy this to hardware/teensy/avr/cores/teensy3.
Indeed the problem is Serial1.end() isn't clearing error status bits that can result from additional bytes (or garbage - like bytes at the wrong baud...
@Paul - It happens on my machine!
Begin Test
(9600) $PGACK,103*40
(9600) $PGACK,105*46
(9600) $PMTK011,MTKGPS*08
(9600) $PMTK010,001*2E
(9600) $PMTK010,002*2D
(115200) $PMTK001,220,3*30
(115200)...
After much fiddling, I believe I've managed to make this highly reproducible.
Defragster, Microderm, can you run this code on your boards and check it reliably gives this result?
It should always stop with...
Quick issue I see is that you're over running your buffer. You declare val to be 8 ints in size, but you're trying to stuff 9 ints in there! You need to declare val to be size 9:
int val;
Hello,
I am trying to make a laser "harp" using the teensy by reading some LDR's that have a laser pointed at them. To start I just did the bare bones tutorial #4 reading A0 to check the hardware before carrying on...
I'm rather new to Teensy programming. I have a project where a previous programmer installed a mostly functional arduino program onto a prototype. I would like to use the same prototype for testing, but I need to get...
As far as I know there are no setbacks or precautions from powering without a computer, the only thing you should avoid doing is making calls to the usb serial.
Tonight I try and I uploaded the code.
It was obvious, but I did not think about it
Thank you so much
You're right, but I currently have little time.
Work, projects, women :D
a bit funny to admit but i just randomly discovered it's possible to operate teensy after uploading a program with just a simple USB adapter connected to wall power .
i had a program running and then plugged it out and...
Teensy 3.6 uses 3.3 v for signals but you can still power MUX from the 5 v pin from the USB supply. Some mux only need 3.3 supply.
Not sure about having no voltage protection for the mux... they are much more robust...
Hi
Having read lots of articles and posts on the theory of when to use GND or AGND, I was not really any wiser and, in fact, became even more confused. So, I decided to test for myself which was best.
Using an...
I'm working with this again today. Running a trimmed down version of the code from msg #23.
After watching this waveform over and over, the problem appears to happen when the enable signal goes low during a time...
Agree, you should use *real* serial ports.
SoftwareSerial is full of hidden problems and unpleasant surprises when you try to use multiple serial ports. SoftwareSerial appears to work flawlessly when you test with...
I believe they were on this thread.
https://forum.pjrc.com/threads/50537-preparing-audio-with-wav2sketch-getting-error-message-in-terminal?p=172945&viewfull=1#post172945
Hm,
This is a forum about Teensy boards. The 3.x boards have ARM processors, not AVR.
Well, with a Teensy you have up to 6 "real" (hardware) UARTS, so you could have saved weeks.. :)
...
Hi,
I have 4 time a 32*16pixels WS2812B led matrix on my desk. I would like to show a 2 digit counter on this "matrix". So i connected the leds together.
So my question is if there is a libary to show something...
I'm going through the last few weeks of IPs right now (fell a little behind on this lately while working on Teensy4).... most are from India, Pakistan & Russia, adding more netblock to the forum's IP bans.
FWIW, that...
Cleaned and banned. Added his IP to the "IPs to block list". It was already put there by defragster, but it seems that Paul didn't find the time to process the list for a few days.
Paul -- I wonder if you have example test wav files that have the "features" that necessitated the STATE_PARSE4 and STATE_PARSE5 strategies to "ignore extra unknown chunks" (presumably after fmt) and "skip past junk...
that spammer who posted here i messaged him on facebook to stop flooding the forums and reported him, he “viewed” my message within a minute and never responded. He’s definately doing it on purpose
