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My understanding is that it may cause damage to a connected device. That said, since my original post, I had done this literally tens of times and the USB port on the PC was never affected.

I'm making slow, but steady progress on adding a UVC class video driver to the USBHost library. So far, I have spent most of my time consulting books and downloads about the UVC class and slowly adding code to my driver skeleton. Today's...

A similar question: I accidentally did this. Connected USB to a teensy 4 and a 5V power supply simultaneously. The 5V supply was also supplying a display driver in parallel. Is it likely that this killed the display? The display isn't working...

I think we may need a bit more information, and a simpler example - ideally using just Arduino and Teensyduino. I'd recommend you try with Teensyduino 1.59 beta 3, because there were some definite issues with bad interactions between the SPI and...

OK, I can confirm that installing the 0.59.3 board package fixed the issue. Thank you so much h4yn0nnym0u5e! I will take the repo private for some time while I work on the project, then I will make it public again when it is finished. If anyone...

Great, THX. I checked the additions in GDSTx for the BT817-7" screen, using the 5" BT817 screen and to my surprise it works very well, even though the dimensions of the screen in theory are 800x480, internally the BT817 chip easily supports the...

Thanks a lot for your answer ! I doubted that would be kinda difficult but still wanted to try asking. FYI, the CS42448 will stop being sold from september 2024 with no replacement (see https://www.cirrus.com/products/cs42448/ and...

First to answer your "Is it possible" regarding 512 bit data frame, yes, at least in theory from reading the reference manual and datasheet specs. But as a practical matter, editing the audio library code to accomplish this requires...

If you just want to try Phazerville firmware on Teensy 4, all you need is a normal (not VOR) version of the Ornament and Crime boards... with Teensy 3.2 installed in a socket. (sadly, it seems many were built with Teensy 3.2 hard soldered). If...

Hi @Leetut a quick one to try - can you make the delay in the loop a bit longer and see if that helps, I found neotrellis locks up if polled any quicker than 12ms. I used a loop of 20ms for reading the keys and let everything else run as quick...

I ordered one from adafruit for testing and will be here friday. Its about the only sensor I don't have

Its working now without me having to change anything, the i2c_address_detect script still doesn't detect it but when I loaded up the NeoTrellis example it lit up like a christmas tree, maybe something in the sketch needs to activate it.

Thanks for the advice. I tried yesterday night your propositions, but to no avail, I am consostently getting 0 as an answer instead of 01101100, I spend the next hour and a half coding a crude 4 channel oscilloscope on my Uno and the serial...

From the 817/8 data sheet - "BT817/8 supports Horizontal Scanout Filter (HSF) operation. The HSF applies a high-quality filter to output pixels, correcting for LCD panels with non-square pixels (the physical size of the LCD pixel is not square)...

Hello, I've seen that the TDM objects in the audio library handle 16 channels at 16bit, so 256 bits TDM (TMD256). I would like to have 16x32bit channels(all outputs or all inputs) on 1 TDM object, so 512bits TDM (TDM512). Is it possible to make...

@Turby: The BT817 chip in 7" screens corrects the problem of non-square pixels. This is the timmimg table, left: 7", right: 5" GDSTx updated! #define SizeEVE 74 Share us some pictures of your TFT (by the way: my next BT817!, yeah!)

Tim: For reference, my USB MIDI keyboard sends MODWHEEL & PITCHBEND MIDI messages anytime those controls are moved, independent of whether any keys are pressed or not. Your plan for monitoring for changes & sending appropriate MIDI messages for...

Wordz is hard. Got the board, got the cable, got the beautiful pin out card. I am absolutely not asking about low-level details Gaia forbid. I was used to that 'other board' where I had to connect a USB host board to RX/TX. I've only started...

Great thanks. I did buy that cable along with the Teensy so I just need to do a teensy bit of research to double check where the connections to the board go. Mr. Stoffregen has provided that page below. I'm using VSCode so I had to turn the .ino...

Totally awesome response, Mark. I get what you're saying, and so clearly. Thanks. I was almost ready to order a couple of standard linear 10k pots. I'll give this a go later today. I'm assuming that in actual use, I'll need to keep track of the...

If you are using the 7" screen from Riverdi, you may have found that the pixels are not square. on the BT817, you can set horizontal resolution to 1076 to get things nice and square again, only really noticeable if you draw circles... #define...

It's good to know that you chose this type of screen, you really went to the top of this type of TFT's: 7" is really quite a challenge. The BT817 chip should work without problems, it seems to me that the times between the 5" BT817 with which I...

😃Nice, didn’t know you were an opAmp nurd too!

Several times I've considered making an ADC shield. Might still do it. Recently have been playing with a relatively cheap (~$4) single channel 16 bit ADC chip and a 8:1 mux, both controlled with FlexIO. Input setting time is a difficult...

Every Teensy comes with a pinout reference card that shows which pins. I'm guessing you already have that? Or you can see it on the Teensy 4.1 page and find a link to download the PDF. If you're looking for more detailed documentation, this...

Hello tonton81, I am using your great library, but I miss a function to read a specifc mailbox. I'm using dedicated mailboxes, just receiving one single Can-Message/Identifier per Mailbox. I want to read out that specific content of the...

Sure, here's a quick attempt

When talking of what can versus can not be done, it's important to keep in mind whether the limit is the hardware capability or only the artificial limits imposed by the MPU. If you configure the MPU differently, the hardware can indeed execute...

Micros returns a 32bit result. It overflows every 2^32 µs which is every 4.295E9 µs (=4295s = 71.6min). To prolong this you can store the value in the lower 32 bits of a 64bit variable. Then look periodically (at least once every 71min) if the...

I have developed 2 libraries for DMA Serial for Teensy 3.6 and Teensy 4.0 which are fully compatible with Arduino architecture and code style and easy to use. They are currently open-source and available to public at my Github page...

If you look at this Arduino Library for the L6DSOX you will see what @brtaylor and @PaulStoffregen is recommending. It illustrates the typical way of working with SPI devices: pinMode(_csPin, OUTPUT); digitalWriteFast(_csPin, HIGH); //Lib...

Let's start with the first serial port on pins 1&2, this is addressed as Serial1, so Serial1.begin(11520); works. Likewise for the second serial port on pins 7&8, this is addressed as Serial2 and Serial2.begin(11520); works. I am sure you get the...

Looks like the controller has a simple serial interface (set speed by sending a byte). So, instead of an EE solution you could think of using a Teensy (or a cheap controller like a XIAO) to read in the throttle value, calculate the required speed...

Great! thanks.

Micros returns a 32bit result. It overflows every 2^32 µs which is every 4.295E9 µs (=4295s = 71.6min). To prolong this you can store the value in the lower 32 bits of a 64bit variable. Then look periodically (at least once every 71min) if the...

How much time ellapses before the micros() built-in function rolls over on a Teensy 4.1, and how to increase this time?

Hello Micky, You mentioned you picked up a Teensy 4.1 for this, so here is fine. The C4 connects to the Teensy via the Teensy's USB host port, with this cable and as seen here : https://www.pjrc.com/store/cable_usb_host_t36.html Grab that cable...

Since you recommend to move to Teensy 4.0 and 4.1 as a replacement, it would really be very good to develop a version of these controllers that provide a better ADC accuracy. There are numerous users that have problems with missing bits etc., as...

Hi - Is it possible to play audio at a specific time in a wav file and for a specific duration with the current audio library? Thanks!

This may be the reason it won't start with that battery on? That keeping the RTC part alive with 3V is good to help power on in some cases noted by PJRC. But that pin like others is 3.3V limited and having higher voltage may be blocking startup...

I have developed 2 libraries for DMA Serial for Teensy 3.6 and Teensy 4.0 which are fully compatible with Arduino architecture and code style and easy to use. They are currently open-source and available to public at my Github page...

If you just want to try Phazerville firmware on Teensy 4, all you need is a normal (not VOR) version of the Ornament and Crime boards... with Teensy 3.2 installed in a socket. (sadly, it seems many were built with Teensy 3.2 hard soldered). If...

I have a DC motor controller that requires a 0-5 VDC input to vary the PWM for a DC motor controller. I bought a motorcycle-style handgrip to control the controller. Unfortuntatly the handgrip is based on a 49E hall sensor and outputs 0.8 to 4.2...

I'm listening but this is part of the discussion above my pay grade. Because of the current draw, I re-implemented an older circuit of mine for Push On - Hold Off, and am now using a separate RTC as noted earlier in this thread. I'd like to use...

The processor manual has this temptation to try for wakeup on pin (state? change?): 11.4.1 SW_MUX_CTL_PAD_WAKEUP SW MUX Control Register (IOMUXC_SNVS_SW_MUX_CTL_PAD_WAKEUP) MUX_MODE : MUX Mode Select Field. Select 1 of 2 iomux modes to be used...

Yep - just a thing to watch out for, and a solution. Rechargeable lithiums also go to 4V or so while charging, so that's something to regulate down for longest battery life. The big surprise is that the consumption goes UP when you turn the...

Hey! I was inspired by this thread to put together a project of my own, this time as an audio vectorscope for displaying oscilloscope art. I'm using a teensy 4.0 and a Riverdi RVT70HSBNWN00, the 7" EVE4 TFT display without touch screen. I am...

Wonder if you could set RTC alarm for say 15 seconds and have it check for a pin level change and if no change go back to sleep. User would have to switch something or hold a button for at most 15 seconds.

I'm listening. It needs to be noted that the recommended batteries are 3V lithium coin cell, not a 3.6V lithium, different chemistry and voltage.