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This may actually be easier in some ways with a Teensy 3.2 Core over a 8/12 pin Atiny since if you carefully use the alternate special function pins to get close to where you need to be and sacrifice using any pin that...

Now it appears sk6812 led,it has the same protocol with ws2812b. SK6812 has RGB,RGBW,WWA,SK6812 rgb is similar with ws2812b led,the main difference between the two drivers is that the SK6812 has voltage-independent...

Only Teensy 3.5 & 3.6 are 6 layer PCBs, and most of that is needed to get so many signals to "escape" the BGA in only 2 directions.

Yes, the minor loop could be used to write to another port, for 16 outputs. Another idea might involve the interrupt quickly starting another DMA transfer. Some WS2812B look for a 50 us gap, others a 300 us gap. So...

As I recall, the code inside PID_v1 also checks millis() and does nothing if it's not time to do another sample. You'll probably need to delete that code from the PID lib if you want a hardware timer to control the PID...

Lifting pin 26 on several bad boards didn't fix them.

Koromix, That did the trick. Reset Application did the trick. Thanks man..

I really hope this isn't true as that means I've done some really stupid stuff with batteries. Guess I'm going to start moving to protected batteries and hope the under charge/over charge protection circuit in built is...

@Wayne: The board model can only be identified while the Teensy is in bootloader mode. TyCommander keeps the serial <=> model information in cache to remember it. If the cache is wrong, you can reset it in several...

Very good idea, it is something I had thought of after toying around with enamelled copper wire. Small guage wire could be a better way. I've now fallen under peer pressure and made them so you can see out of them,...

Yup, sad to confirm this would be fruitless indeed. That 6 bit DAC is internal only. Even if you could access it, somehow combining it with the 12 bit DAC won't give you a DAC with 18 bits resolution. There are all...

I do not recommend this approach. I'd suggest computing which pixels should be on at any particular time (rounded to the nearest 1/30th second). This may seem more complex, but in the long run it's much simpler. ...

Thank you. This is really helpful to know which direction to start in some of the myriad choices involved in a total system.

Yes, so I'm thinking (hoping) frame rate will be able to achieve the pulse animation I'm thinking for. Just subtract a pixel from the direction pulse is going away from and adding one to the direction pulse is...

Yup, those both describe how the FTM timers work. PulsePosition uses only a subset of the many FTM features. The 2nd PDF has a code fragment that uses fancy types defined in some header file, which differs greatly...

Also keep in mind that the LED controller chips internally use PWM frequencies between 400 Hz to 2 kHz to actually control the LEDs. Very rapid updates where you keep the color the same for only a few PWM cycles tend...

Thanks Paul, will check it out.

To write to sectional areas, you must still write up to and including that area, stopping there will not touch the rest of the length, but everything before that section must still be written

To specifically answer your question, with the commonly available LEDs strips (WS2812B, APA102, LPD8806, etc) you would need to relax this requirement to control only LEDs beyond the first part of the strip: The...

A similar question was asked (and answered) yesterday on the FastLED Google Plus group. https://plus.google.com/113061739593069598509/posts/7aNEhcBGJNe

Works on the laptop fine. This computer is a new Dell and still reports can not upload and that it is not a Teensy 3.5 connected. The original Teensy 3.5 from the store reports good. Again, the bootloader on...

Now that I understand how critical pin 26 (~EZP_CS/PTA4) is to the first boot process, I'll check for soldering/board errors that could ground it. Maybe even the gate capacitance of a mosfet makes it appear low...

This: //#define I2C_F_DIV28 ((uint8_t)0x08) ... //#define I2C_F_DIV1536 ((uint8_t)0x39) https://github.com/PaulStoffregen/cores/blob/master/teensy3/kinetis.h The usual caveats - as in "it might not work" or...

Sorry, ... beginner's oversight. I didn't scroll down far enough, where the pots are read and thus connected.

All good advice, thanks everyone. Eventually this will get fixed and I'll report the results. I populated a board with just MK20, decoupling caps and MKL04 and it worked - but maybe just because it's one of the 33%.

you can also set it via device manager on the usb “hub” itself

Maybe show us photos of how you've actually wired everything. We're pretty good at noticing problems when you share good photos. For example, on this thread someone was experiencing strange problems with multiple...

You're missing setSyncProvider(). Without this, the Time lib is just using its own timekeeping from millis(), not actually linked to a real RTC. Click File > Examples > Time > TimeTeensy3 for an example.

I'll have a look and see what I can understand. Thanks

This should give you a nice starting point: https://github.com/MajicDesigns/MD_MIDIFile

Don't forget to use INPUT_PULLUP mode on the pin. Regular INPUT is highly sensitive. If you use long wires or have a very noisy environment, you might need to add a real 1K pullup resistor between the pin and 3.3V. ...

Hi I tried using digitalRead() and I was able to switch the inputs, ut there is a lot of noise. I will try using bounce library.

Glad you found this! I must admit, I'm not a Windows expert and probably would not have thought of this setting....

Normally you should read switches with the Bounce library. You can also use digitalRead(), but Bounce is better because it will automatically deal with mechanical chatter in the switch. Most of the audio library...

Sorry for the delayed response. I have added the udev rules to the container in which I am running the application. The following line is the Docker command to copy `rules/49-teensy.rules` into the `rules.d` folder....

Looked at the library code. It seems to just use timer2 to generate interrupts at 2kHz rate, which is pretty easy to replace with IntervalTimer. It also directly accesses PORTB. Here's a quick (untested) attempt to...

Hi, Can I use commands to setup multiple inputs for the sgtl5000? Eg : int a= AUDIO_INPUT_MIC; int b= AUDIO_INPUT_LINEIN; void setup() { sgtl5000_1.inputSelect(a); ...

There's only limited advice I can offer for a motor controller I've never used, and a sensor I've never used, and a fairly complex code fragment that doesn't show all the variable types or definitions of several...

Hi, I tried all you suggested.. different areas and additional wires.. but still the same.. as soon as I attach a further 10K Potentiometer, the problems begin. But I recognnized something curious.. I unplug the...

I am using an older version of Arduino. It works perfectly now. Thank you.

I don't have the environment to run this. I am just helping to compile a program. I have the binary at hand. So if anybody want to try on Openwrt, I can give.

I've not seen a compendium PDF and there is no WiKi or other over view. Depending on ability to read code, or interest in learning, there are header and source files installed locally by TeensyDuino. With a...

Yes I have looked over both those locations, that where I found the reference to the intervaltimer routine. I should have been more specific, I was thinking of something more along the lines of a pdf file that I can...

Just to be clear. I do have both(either) the master or the slave running on RX1/TX1 on a T3.2 with the ModbusRtu file from BEN's post....same setup with the ModbusRtu.h (one from your link) did not respond to a known...

nvm I got help with this already

Maybe start looking at other stuff than the crystal....

I haven't been able to get a good board to fail to load. I could try to mildly heat/cool the board and crystal, hoping to make it fail.

Thanks Paul.

Any chance you could post a multiple-port test program? As you can see in msg #20, it seemed to work fine when I tested with a single port. If you can give me a program that shows the problem with multiple ports, I...

update: i have added to my code and the lcd now reads waitng for time. i guess i just don't understand what commands/code to use to make the teensy send the data from the gps to the lcd. as i might have said earlier i...

Usually #2 is best, if you can also connect whatever sensors or other analog circuitry you're using to AGND. Otherwise, the other 2 are also ok. Using AGND usually only helps if you also have something like LEDs...

Do the boards that work boot up reliably every time you power cycle? If so, I'd suggest you're letting the crystal layout distract you from some other problem.

I wasn't sure how to read that part - I thought that was referring to the " has no 'PortName' registry property" items. Very Odd - I got one each of the 3 Beta units for T_3.6 and T_3.5 before KS units shipped and used...

Thanks for reply.... I am still confused about the size of your files..... one of your files listed as 3937 Ko equals 3937 Kbytes equals 3.937 Mbytes ....... so adding up all your files transferred .....comes to over 14...

I've been reviewing the Kinetis K20 manual section 6.3.4 (boot sequence). I see that I am using pin 26 (~EZP_CS/PTA4) and that I have a 130K pull-up resistor and a small mosfet gate connected to it. But I've tried...

https://www.pjrc.com/teensy/td_timing.html

If your samples vary in a consistent pattern, like the graph in post#6, you could just pad the beginning of the sample with silence. Have 4 separate samples trimmed with silence to offset the variation in delay, and...

This is one list: https://www.pjrc.com/teensy/td_libs.html

Thx Chris!

I disabled the USB charging, and the voltage across Vcc and ground on the usb rose from 4.36v to 4.5v... but still no luck. For the keyboard controller that works, the voltage is 4.6v. Does it make sense that that might...

I apologize because : Ko = Kilo octets = Kilo bytes So, W25Q64 = 64 Kilobits = 8 Kilobytes I try : ser = serial.Serial(sys.argv, 9600, timeout=0, writeTimeout=None) But no effect ! This breaks the thermometer...

Perhaps use the audio shield temporarily, only for the purpose of learning how the hardware works. Even if you wish to create very different hardware, starting from working and well documented hardware can save you a...

I'd recommend starting with the audio library tutorial. It has a 31 page PDF with step-by-step instructions, and there's a 45 minute walkthrough video you can watch if you get stuck. ...