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How about a Teensy 5 board with dual/quad core? Wish List: 5V tolerant Low Cost Ethernet USB Host

Many thanks for the answers. Yes, I could change the code, but that is difficult in this case. If I turn the board off and on again, then the upload will start. It's not ideal, but ok. This is better than always pressing the button, as it is difficult to access.

I have this code: attachInterrupt(digitalPinToInterrupt(CLOCK_PIN), interrupt_func, RISING); FASTRUN void interrupt_func() { noInterrupts(); // Waiting for LOW while(digitalReadFast(CLOCK_PIN) == HIGH) { } // wait 4x 280ns cycles inside this interrupt...

Thank you very much for your efforts. This is a very good start to try something with it

Found a solution. The problem is, that directly after the "usage=90003" (Wheel button) Value "1" event, 4 more "usage=90003" events with Value "0" follow without the button being released. Thus the value "1" is immediately overwritten again with "0". To me it looks like no 90004, 90005, 90006...

Good hint. Where to enable the debug function?

I've tested a Logitech B100 Mouse... Wheel Button not working. Can someone fix it?

Can someone post a Teensy 4.x example sketch? Tried the post #14 code ... "IRQ_UART0_STATUS" is unknown.

These are good hints. Thank you very much. I will test the SoftwareI2C Library.

Yes, this is the only solution. Can I use the Wire library or another library I do not know yet?

I don't want to use the standard I2C pins (24,25,16,17,18,19) but 28 and 29 for SDA and SCL (to drive an OLED 1306) Is this possible?

Yes, this is also a good option :-) Thanks.

That sounds very good. It is faster than the SDCard (read mode only)?

The Teensy 4.1 has 8MB Flash Memory. This is a lot. Can I transfer some data (2 MB or so) into it, while the Teensy is running? Because the 500Kb RAM memory is very small. I've found this: LittleFS library Is this a solution to transfer and use Data dynamically?

Good excel table. About "Max Contiguous bits" ... its not so relevant, because the left and right shifts are damn fast. The whole read write process is very very fast also with a lot left and right shifts also with some direction changes (with 816 Mhz).

You can see it in the picture... then you can move the GPIO lines in the right direction, in every program. Or you can use a monospaced font, or you can copy it into the Arduino IDE.

I've added as txt file the Pin Overview of the Fast Ports and Bits for the Teensy 4.x and some read write and direction lines so that you do not have to search for everything in the forum. This gives you a quick overview of how it is possible to read or write numerous pins in parallel as...

Thank you for the note

I'm also interested in this because I'd like to put the chip directly on a PCB, since then everything can be smaller, and the pins are then where they are needed. Here in the thread was mentioned the bootloader chip, which is on an external board, connected to the PCB with the microprocessor...

Thank you for the very fast answer (it looks like you are always everywhere :-) ), I've made one for older Arduino boards, then I will make one for the Teensy.

I want to use USB Host port with MIDI & TOUCH (for a Touchscreen). But inside the Arduino IDE I can not select these: Is there trick to make that possible?

I'm an idiot ... forgot to solder 2 pins on the backside of the IC socket (SCK and MISO). Now it's working fine. Damn 8-D

Thanks for the hint. The pins are correct. As I wrote, with the Pro Micro 3.3V it is working fine. But I need more pins, and I have 4x Teensy LC here, so it would be good if it would also work with the Teensy LC

I'm using the USB Host Shield mini successfully with an Arduino Pro Micro. Now I wanted to try a Teensy LC. But, it doesn't work. Teensy LC Pins: 9 INT 10 SS 11 MOSI 12 MISO 13 SCK USB Host Mini Pins: RST -> 3.3V Is the USB Host Library 2.0 not working with the Teensy LC, only with the...

I've found the bug... It was the USB Connection of the USB 3.0 Hub. For years no problems, but since a few days, it is not possible anymore to flash the Teensy 3.5 with Arduino IDE + MacMini M1 (only with the complicated Blink sketch trick). The solution: USB 2.0 HUB from Amazon directly...

Thank you, yes, it seems that the problem has disappeared with the Blink sketch. Interesting. I think it was something with the USB ports, because the problem started with the Mac M1 and USB system crashes. Also, the MacMini M1 with only 16GB has significant memory issues.

I have been using Teensy boards for years, including LC, 3.1, 3.2, 3.5, 4.0, 4.1 MacOS 12.3, MacMini M1 Never had big problems until today. Today I wanted to load a sketch on a Teensy 3.5 again, then I noticed that there is no USB port in the Arduino IDE. After pressing the button on the...