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I found the solution by myself. You have to use pinMode(x, INPUT) and then you can manipulate the Port with GPIOE_PDDR very fast. Without pinMode before its not working!

Hi, I can switch the complete ports with GPIOE_PDOR and GPIOE_PDIR very fast (High/Low ~7ns) I was searching here in this forum for an also fast pinMode alternative, but I found nothing. My question: I want to switch a whole port from Input to Output. Is this possible? I've tried GPIOE_PDDR...

Ok, crazy. With the downloaded Teensy 3.6 Libraries the Midi Examples in there are working fine. The Teensy 4.1 Midi Examples inside Teensyduino are not working.

Thank you, I will try these Lib Examples :-)

I have the same problem like some others. I'm using the Teensyduino IDE 1.53 on my Mac Mojave with the Teensy MIDI "InputRead" Example and an AKAI MPK mini Keyboard connected to the 5 Pins on the Teensy 4.1. I've selected "MIDI" under Tools -> USB Type 1. First problem... there is no Power on...

Thanks. Thats very good, because now I've found a very simple Serial <-> USB solution, better than all what I've used/seen before. From this day on, I don't have to struggle with USB Libs and Code anymore (it seems thats a new universal solution).

I'm using the T3.5 Which USB Port is the USB Host port? The Micro USB which we upload the Sketch, or the 5 USB Pins on the Top of the PCB? And how I can power the USB Device with the T3.5 5V Power?

Thanks. Good info. Bench Power supply + Reset: yes, something similar :-) I think that it is, if the VUSB-VIN pads were not cut apart. But I've cut apart the VUSB-VIN pads... and now it's working fine.

I've cut apart the VUSB-VIN pads. Now it is working fine. Maybe I've missed something. I don't know. But what is this curious LED state? With USB Power the LED is off, without the LED goes on. Btw. thanks for the fast response, world record ;-)

Teensy 4.0 "5V in" not the same as "USB 5V in"? (no MQS Audio output) Is there a difference between USB 5V and 5V in Pin? I'm using the MQS Audio Out Pins, but these Pins working with USB 5V only. At least they seem to need the USB 5V for "starting". Because if I cut off the USB 5V after...

Too complicated for me. I will wait for a CPU reset register version.

Yes, this is useful.

For me the code is not working at all. 1. Can not compile the code (error) 2. if the code is running (modified a bit), then the reset is not done. /Applications/Entwicklung/Flasher/flasher4/flasher4.ino:143:35: warning: invalid conversion from 'long unsigned int (*)()' to 'getExternalTime...

You have an email.

Can someone post a link to a PWM Audio Out example for the Teensy 4? And can I also use the "MQS" Pins for that (without to use the "MQS" Audio Stuff)?

Can I direct connect the MQS Pin to my TV Audio Input (Chinch)?

Usable for Teensy 4.0 ?

Thank you for the infos

I've tried to use Pins 0 and 1 of the Teensy 4.0 I can use Pin 1 but only as input, and Pin 0 only as Output (not as Input) But I can not use pinMode for these pins. Is there a specific reason? In the Arduino Teensy 4.0 Settings menu I can also not disable "Serial"

Thanks. Ok, no fast pinMode :-) Finally I had success reading pins at 800Mhz and finished my project. It would have been nice if I had more possibilities, so i had to delete some features, but at least it wasn't a complete failure ;-) ... and it seems, 800 Mhz is not enough. The slow Pin...

https://forum.pjrc.com/threads/29778-pinModeFast()-doesn-t-work-in-Arduino-1-6-5-(Teensyduino-1-25-beta-2)

Question: pinModeFast is not available anymore?

At this time with the new Teensy 4.0 you can not use many pins with a breadboard, because they are on the back side :-) Outer 2nd Row: Breadboard is not a big problem... use an adapter board for breadboards (outer row with headers upside), or no adapter with headers upside for the outer row...

Another idea... why not this?: I mean... why only 1 row on each side? Make it not longer... make it wider :-) Or make it longer + wider + cutable Then anyone can place pin headers where they want them. And then we never have a pinout problem! Be creative!

Thanks I will try to test it.

KurtE send me a link to this interesting thread. Ok, what I think about the Teensy 4.0, and my idea for a "Long" Version. First, make the length optional! How? Break/Cut-able! I need a small Teensy 4.0 like it is, but I need 2-4 DACs and I need 5V tolerant Digital Pins, and the fastest Digital...

Wow nice. I will definitely test this too. Yes, the Teensy 4.0 is a little bit more complicated to handle. I also miss the very nice 5V tolerant Digital Pins very much.

Ok, I've tested it with MQS, and is working fine ;-) Thank you!

More informations as I expected :-) Thank you very much. It seems that this forum is much better than the most. Less haters. Here is the definition: uint8_t portPinsD[pinCountC] = {1, 4, 2, 22, 5, 6, 7, 8}; I will do some tests tomorrow.

But... it seems if (digitalReadFast(portPinsC[0])) ret |= (1<<0); if (digitalReadFast(portPinsC[1])) ret |= (1<<1); if (digitalReadFast(portPinsC[2])) ret |= (1<<2); if (digitalReadFast(portPinsC[3])) ret |= (1<<3); if (digitalReadFast(portPinsC[4])) ret |= (1<<4); if...

Thanks, thats also ok :-)

I'm trying to use: #define PORTC_PDIR GPIOC_PDIR #define PORTD_PDIR GPIOD_PDIR But... sketch_nov15a: In function 'void ReadLines()': sketch_nov15a:30: error: 'GPIOD_PDIR' was not declared in this scope #define PORTC_PDIR GPIOD_PDIR In the Arduino IDE. With the Teensy 3.5 this is no...

Edited, ups... false board :-)

Thanks, I will try it out.

Thanks for the fast reply. How I can use the two MQS pins (pins 10 and 12) as DACs? But I think I will use a Teensy 3.5 and saw off the board all behind the pin 18 (the whole SDCard) Then I have 5V tolerate pins and its nearly short like a Teensy 3.2 and 4.0

Hello, I'm confused, the Teensy 3.2 and 3.5 3.6 had DACs (1/2/2). On the back of the Teensy there are 4 DATx Pins. Are these DAC Pins? If not... has the Teensy 4.0 no DACs? Another question: why the pins are not 5V tolerant? This was a very good feature, now I have to use 3 x 8 Pins Voltage...