kd5rxt-mark
Senior Member

@MrCanvas (Daniel): You probably found my earlier posts where I had almost the exact same experience with the RA8875: my wire-wrapped prototype worked flawlessly, but I could never get the first two versions of the...

Quick answer (& hoping I'm correct, as I don't have any experience with the Teensy LC): of this, I am certain: the D+/D- pads on the bottom of the T4.0 are for the USB host interface made for plugging other USB...

Hal: You're welcome !! Hope I helped. Good luck !! Mark J Culross KD5RXT

Hal: Yes, I do use that cable & yes, that's the interface where I connect other synths, sequencers, and keyboards to my TMPS (TeensyMIDIPolySynth). The MIDI library calls for MIDI capability thru that hostUSB...

@HalRomans: Sorry that the earlier suggestions didn't help. Not really sure what's going on with your setup. I do compile my TeensyMIDIPolySynth using Serial+MIDI & it works great. I am able to both send (to...

Try these: 1) Add the following somewhere after you've included MIDI.h MIDI_CREATE_DEFAULT_INSTANCE(); 2) If you take a look in the Arduino IDE at "File, Examples, Examples for Teensy 4.1, MIDI Library,...

If you go to the main <PJRC store> page, there's a list of distributors down the right-hand side. Don't have any experience with any of those listed in the European area, but maybe one would fill your need. Hope...

You might check if your hang/crash when specifying DEBUG optimization is a result of <this> (the whole background story can be found in the rest of the thread), and if so, you should be able to temporarily apply Paul's...

@flocked: I am not aware of the standard name of the entire cable assembly as shown in your photo, but I believe that the ends are commonly called "ring terminals". Maybe that will help in your search ?? Mark J...

I'm following along here with much interest, as I would eventually like to be able to build a stand-alone Teensy + TFT touchscreen FT8 transceiver (learning more about the how the DSP approach to FT8 RX/TX works along...

In the Arduino IDE, take a look at the examples under File / Examples / Examples for Teensy 4.1 / FlexCAN_T4. One or more of those should get you started. Mark J Culross KD5RXT

To close the loop, I have re-balanced all of the mixers in the audio chain of my TMPS project, and I am now getting full-amplitude signals from the LINE OUT on the SGTL5000 audio adapter. Working solution: For the...

@SteveCS: Paul's suggestion for using the ILI9341-based screens is a good one, & the 320x240 TFT touchscreen that PJRC sells (again, good recommendation by Paul) works very well. If you need something slightly...

Blinking the red LED is not normal. The BLINK sketch will blink the orange LED. The red LED is managed by the MKL02 bootloader chip, & any lighting of the red LED, other than when programming, indicates some sort of...

@Hamish_Pye: OK, thanks for the link to the actual display, but particularly for their info on what pins to connect to their display. I'm guessing (going by their pin names) that you should be connecting as...

@Hamish_Pye: Thanks for the library link . . . that's a useful start. Please post your sketch as well (make sure to enclose it in CODE tags - use the "#" button above the text composition area where you create your...

@Paul: 1) running your test sketch on a standalone T4.0 + audio adapter results in 1.3Vpp waveform as expected 2) modifying your test sketch to use a modulated waveform generator (as I do in TMPS), no change in...

@Paul: Thanks !! You beat me to the punch !! I was literally going to do the exact same simple code test & measure the output on that when we got back to our son's house. My buddy (also testing a second hardware...

@MrCanvas(Daniel): I have used <this> 7" RA8875 800x480 TFT display from buydisplay.com with great success in several of my Teensy projects. It comes with a selectable resistive/capacitive touchscreen, but I believe...

You're missing the pound sign (#) on the line that should be as follows: #include <MIDI.h> Mark J Culross KD5RXT

Posting in multiple places will likely lead to a scattering of related answers. I offered some advice in the <other thread> where you seem to have asked the same question . . . Mark J Culross KD5RXT

The Teensy MIDI capability supports standard MIDI to/from serial (using the external hardware interface that you seem to have already built), MIDI to/from the standard USB interface (the same USB cable used to program...

Sorry, I may have been editing my post at the same time as you were replying, so you may not have seen the question about the memcpy length parameter. Since the CrashReport is saved from the previous crash, load/run...

Should the length to be copied in your memcpy call be MIDI_BUFFER_LENGTH instead of SYSEX_PRESET_LENGTH (assuming that the MIDI buffer is smaller than the total SYSEX array) ?? Maybe try adding the following to...

Maybe try adding the following to setup() to aid in narrowing down where the crash is occurring (this capability provides info gathered during the crash, but reported as part of the next boot): if (CrashReport) {...

@SteveCS: It looks like there are some image tools (UTFT), with example sources, included as part of the TeensyDuino installation (located at "C:\Program Files (x86)\Arduino\hardware\teensy\avr\libraries\UTFT\Tools"...