Activity Stream

Again looks great I need to play with it! It can come in real handy!

How about this "ready-to-use" solution on the Teensy? https://forum.pjrc.com/threads/60332-High-quality-audio-streaming-using-NRF24-(working)-Sample-rate-synchronization?p=234918&viewfull=1#post234918

I feed a teensy 2.0 with a external clock of an old device. Some of the devices have a dirty clock signal, so I have to set the low pass filter of the clock lower. This helps on most devices, but on some not. I notice...

Typically when I am working with RPIs, I am doing so by running them headless. So most of the time I talk to them through some terminal window. On Windows this is typically KiTTy (PuTTy). So with the CLI version...

Sorry, I have played a reasonable amount with DMA stuff and some timer stuff.. But this is not something that is easy to debug, without a full setup and a lot of hair scratching. But in any case like this, the...

@Frank - Now I see what you were trying to do with the colors and device info. Detecting compatibility between the many inputs and outputs is something I've wanted to do for a very long time. I've actually thought...

Why do you ask? The reason I ask is because what you are asking may not be important to what you need to do. Can you explain what you are trying to do?

If this is a time-critical event, then your friend is going to be assembly code. However, I would be hesitant to rely on any library routine to do the debounce without careful scrutinization of the code and knowing...

OK, so there may be something going on with the way Teensy is reporting USB ports. There appear to be TWO ports associated with a Teensy connected via a USB cable to my Win10 box. There is a port called something like...

Sorry about lack of attention to detail re rpi4 usage. I'm running feb2020 "Raspbian Buster with desktop" which is still 32bit (running on 64), kernel 4.19. thanks for tips will follow both. Intriguing that there...

Thanks for the feedback. I just tested this whole thing again, using delay(2000), delay(3000) and delay(5000). Nothing works on my Printf_Demo program with a T3.2. However, I just tried the same thing with a T3.5,...

@defragster Glad you tested it and it seems to be working for you. As I said the only thing changed from the @WMXZ'z MTP_t4 lib to the MTPspiffs_t41 lib was the storage class in order to support spiffs. Which was...

What do you thing, where is the threshold where it switch back to 0?

Sadly i2c_t3 not updated yet to work on T_4.x's :( The adaF SSD1306 does have a param for i2c speed to be used though - that makes a difference. Not sure if Wire max was pushed past 2 MHz? But it goes higher than...

Using 1MHz I2C speed, a 50% ping-pong buffer and DMA (with a self-tuned version of the i2c_t3 library and hand written rendering code instead of using a gfx lib with overhead), I could get a refresh rate of a little...

Do not have any advice for nRf but looking at libraries: Check if library focus/summary is what you are after (you probably don't need a mesh capable library in this case) Check how recently they updated (more than a...

Ok, understood. Thank you for all your help! I'll keep an eye on this thread in the meantime and procrastinate developing the communication system in my plane for as long as possible. Please let me know if there...

for now, until i figure it out

Ok! Well, on one hand I'm glad to hear I didn't mess any of my code up, on the other hand, I was actually really hoping that I was wrong and the bugs were my fault so then I could just be corrected and keep moving on...

yup, queue management issue (with or without interrupt probability)

So.. interesting. I stopped sending dynamic data and instead sent static data in tables, and limited to 2 bytes as you requested. It sends 2 canbus messages per frame for each message, and I do see them sometimes...

Prior thread on this IIRC indicated the size may exceed 7 pins in width ??? with large CPU size and ability to bring out the desired chip features ... and have room to pull those pins from the CPU. Anything new info...

I don't know if the baud rate should be set for Serial1? #include <MIDI.h> MIDI_CREATE_INSTANCE(HardwareSerial, Serial1, MIDI); void setup() { MIDI.begin(MIDI_CHANNEL_OMNI); Serial1.begin(31250);

I am currently uncapped sending data from a single node at around 999 transfers of 12 bytes (4 can frames) per second. It's been running for some time now and seems to be working well. I will try to do your...

Just tried putting a repeating serial println in the main loop, it locks up too when a larger transfer comes in. 12 bytes is just my testing, I imagine the maximum will likely be much much larger than that. When one...

Serial Monitor generally not any problem - at least on Windows. It only gets freaked out with output too fast too read. General debug output - even heavy output works perfectly fine. Just the T_4.x running without...

if the lockup is from callback or loop(), serial prints usually find where the last line locked up. if its from an isr then prints wont work unless you put them in library if you are only doing 12 bytes, you can do...

Ok! As I want to avoid having a central node be in charge of scheduling, I will switch away from this library and use flexcan directly and break my data up into more, smaller chunks to avoid needing to send large...

thanks for the library check, could have done that myself actually. from looking at the library the debounce is really the most simple approach, just only scan every x milliseconds. this is of course far from ideal for...

its probably an overlap between nodes that would need to be fixed, on the reassembly side (receiver). if it locked up, it doesnt tell me if it was an array overlap or a memmove transfer injected to wrong array, its been...

What will be the name of the teensy NXP 1170 with the form factor of 3.6? Teensy 5.0? Teensy 4.6?

I need low power AND Megabytes (but I know, I cannot have everything)

@defragster IFAIK, it should be 'No directory' file system on SPIFFS.

That explains why they recover to their usual speed on the heartbeat led after a little while. So all in all, do you think this is an error in my programming, or a potential bug in the teensyCAN library? Thank you...

Frank B - I am chomping at the bit to play with Duff's snooze lib included in 1.52 for Teensy 4. Do you think that the serial monitor is so broken that someone with only medium Teensy experience (2.5 year) and medium...

yeah once they drop off the active list, transfers to them are blocked, the timeouts made me work on that to prevent delays caused by missing nodes by making sure theyre on the list before sending

Oh yeah that's not a problem. As I said in an earlier post, before I added node 3, I just had node 2 sending 20 byte payloads (5 can bus frames) 100 times per second. I did it for 16 hours by leaving it on overnight. ...

Seems to be working - on Win 10 without the external driver tool {see MTPdrive below }. I can copy and read a file from there. Notepad can navigate to open a file. No Subdirectories:: Right click new is only...

maybe theres an issue with the displacement of 2 transfers, can you try with only one node to see if it still crashes master?

Hi, after some intensive testing I found the mistake in reading the serial2. For the receiving and decoding afterwards of the rfid reader serial 2 stream I used the Serial2.readBytes() command and the readBytes read a...

Both slaves are now spamming a lot of received packet data on the their consoles but seem to stay running quite happily. The master still crashes after a dozen or so seconds and displays a huge impossibly sized packet...

Huh the forum appears to have posted some stuff a bit out of order.. I'm breaking everything today :D I will switch both slave nodes to broadcast and see what happens.

what happens if you use broadcast (Node), does the other slave freeze?

not sure, skpang used it to transfer images (pictures) over CAN to display on a remote LCD, so that being a higher size of bytes I am thinking its a code issue as well :P

I upped the TX_SIZE on all 3 sketches to 256 and it lasted a bit longer but eventually, died all the same. Here is my console output on my master before it froze ISR - MB 99 OVERRUN: 0 LEN: 8 EXT: 1 TS: 55007...

XFer has a oood point - there is a lot to like with TeensyLC. I like the really low hibernate current - 11-12 ua compared to T35 at 53ua and T36 60 ua. Also, I have found that TeensyLC can get quite a bit done for $12...

Okay, I'll increase it to 128 or 256 on all three and see what happens. Why would the TX affect the master receiving, anyway? I'm not 100% sure how that works.

check the constructor TX_SIZE, keep it a power of 2, it's gotta be able to be big enough to support your array size in 8 bit chunks. 8x16 = 128bytes max, have you tried normal one dimensional arrays rather than structs?

STATUS is a bad name for that array. Maybe TYPE. The type and channel nibbles together are called the status byte but it's both wrong and misleading here where one might think it's button status.

Ok, I solved my problem: The changed buffer sizes seemed to be ok, but I used the wrong program for uploading the data. If I use amidi -p hw:2,0,0 -s addon/SD/90/RitCh1.syx it seems to work. Regards, Holger

Master (receiver, node 1) //THIS IS NODE 1 #include <FlexCAN_T4.h> #include <TeensyCAN.h> bool debugMode = true; //debug mode for extended sniffer data bool heartBeat = false; //heartbeat led

I appear to be running into a new issue. I have added a third node and am stress testing the system to see how much traffic it can handle, and I seem to be crashing my master. I can share source code if you think...

Hey guys I'm about to release my Teensy 4.1 3D Cad Files just need to adjust few things on the bottom. Quick preview:

This was noted in other thread. A warning was introduced in the TimeLib Time.h include file. On windows this interferes with ALL time.h includes (note case of 't'). IMO, the TimeLib library was designed badly in...

This is the case. I set my interval timer priority to 0 in order to ensure it is completely sample accurate. I'm not exactly sure how this interacts with other timer priority stuff, but it is the highest priority that...

Indeed p#1 has thius where p#6 does not: while (!Serial) { delay(10); } As noted Teensy enters setup() (at 300ms) before the PC can cooperate to complete the USB connect ( perhaps some 50...

Frank: I took your latest program & created a new sketch with the contents (cut & paste) from your post #6. I am running Arduino 1.8.2 & Teensyduino 1.52 under Windows 10pro, using a Teensy 4.1 (that & Teensy 4.0...

I'm glad you both like it! :) Oh no, I own very rudimentary tools, I used a couple of rusty chisels to carve the slots. I must confess that I'm not happy with the quality of the work but I was in a hurry to have a...

Yes, pololu is a good place (IMHO). They specialize in robot parts. My usual purchases include: Voltage converters (mostly step up/step down): https://www.pololu.com/category/136/voltage-regulators; (and) Sets...

* Your IntervalTimer interrupt may have a higher priority than the SWI that triggers all the audio class update() functions. That might cause some funny interactions if the former interrupts the latter. * Your out...

Michael, The pololu seems to be the totally simplest and most cost effective option. Many thanks for the suggestion. Pololu seems to be a good place. I ordered additional things from as well besides the level...

Hi Carlos. I'm working on a merger - controller for a Sequencer that runs on a Mega and it's pretty easy for me to setup a direct TX RX connect with a T2 to play with the idea. Currently, Midi connections are...

What are you running on the RPI4? Raspian? Ubuntu? Version? 32 bit or 64 bit? So if the current download for 64 bit linux is: https://www.pjrc.com/teensy/td_152/TeensyduinoInstall.linux64 I would try:...

Two things. There are various bi-directional level shifters out there made to convert 3.3v to 5v for I2C. The pololu one is the one I typically have used in the past: Pololu: https://www.pololu.com/product/2595...

Looking at the Wiki for the display the I2C pins are probably not compatible with the requirement for 3.3v pins on the T4.1. You can use a logic level converter for the I2C pins. Personally I only played with the...

I've added this to my list of bugs to fix.

Thanks for the information. I am definitely learning about all of this as I go. Like you say this is all fun, but at the same time I would like to try and get this to work with the least amount of frustration as...

i refreshed the udev rules when i installed new arduino ide and new teensyduino so should have the newest. Today I installed arduino 1.8.12 and teensyduino onto a rpi4 and could not load my code to the teensy-LC that...

yes, correct, for bus self recovery to work it must see valid frame bits on the bus, which will drop the TX overflow errors and the controller would go back online. There is no command for forced bus recover, but it...

With (float) cast on the input var it does the math with float - low overhead add for FPU Teensy's: Serial.println("map((float)0, 0, 127, 60, 30) = 60;"); Serial.println(map((float)0, 0, 127, 60, 30), DEC); ...

Great! Thanks for the work

I agree if it where a simple matter of "rounding/truncating errors" that skewed the distribution this way or that, but 3 is just wrong and needs to be fixed. As stated above the goal is to give results that novices...

Like the wrong abs and round its just a poor implementation by the Arduino devs. Best not to use it. I tend to #undef abs and #undef round to get rid of this buggy crap . The similar functions provided by the c...

I am using SDFat 2.0b. I installed the latest version today---which still wants to include Time.h somewhere in the Fcntl.h chain. Fcntl.h is used by default in SDIOConfig.h in SDFat 2.0b on ARM chips. At this...

if ((in_max - in_min) > (out_max - out_min)) { return (x - in_min) * (out_max - out_min+1) / (in_max - in_min+1) + out_min; } else { return (x - in_min) * (out_max - out_min) /...

This is a question of resolution vs accuracy. Having a higher sample rate will give you an answer with more decimal places (ie, higher resolution), but those extra decimal places are not reliable or repeatable. The...

I just wouldn’t use the map() function which obviously produces rounding/truncating errors but rather calculate once by hand the required coefficients and implement the linear conversion function y=m*x+c with the...

Hey all, this is mostly working well, but I'm experiencing an issue with dropped audio frames. Would be incredibly helpful if y'all were able to advise. Made a post about it here: POST

I'm really hoping Paul or someone else with in depth knowledge of the audio library can weigh in on this. My code is doing a multithreaded thing with two layers of interrupts, and I'm thinking that the dropouts may be a...

Running Catalina 10.15.4 and Arduino 1.8.12 works fine for me. Teensyduino used to crash intermittently on my 2 monitor system, then was fine for awhile. Now, it just started to exit (always) immediately after...

Hmmm... tired that out, doesn't seem to have much effect. When I compiled as debug there was a lag before dropouts started occurring but then they come back at the same rate as before. Was worth a shot though.

Yep I got that response on T4.1...void setup() { while (!Serial) ; pinMode(13, OUTPUT); Serial.begin(115200); delay(100); Serial.println(map(50, 1, 50, 50, 1), DEC); Serial.println(map(50, 50, 1, 1,...

Hi lokki Good you got a fix. I'm no expert but looks like there is an influence from the oscilloscope impedance and your long cables as you've found with the cap but I can't say that I understand that. I had a...

hmm, no that does not help too much. i put up to a delayMicroseconds(8000); in there and it still triggers wrongly on some keys. there is a slight improvement though (some keys that were firing 3 different key events...