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Teensy Forum

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Let's talk of possible new accessory boards
Robin and I have a meeting with SparkFun next week. Among topics we'll likely discuss is possible new hardware.

Teensy 5.x is not up for discussion (NXP isn't shipping Cortex-M85 yet). Neither is

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Scrolling example on an ILI9488 display with teensy 4.1
I was trying out the scrollTest example that is part of the ILI9488_t3 library and it generated color bars as soon as the text gets to the bottom of the screen.
Attached is a photo.
I am new to coding but usually can get an example to work right.
The button is just to test the touch screen.

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Prang Pro: A MIDI score sampler on the Teensy
Prang is a MIDI score sampler originally developed on an ESP32S3.

I've ported it to the Teensy 4.1, though it will probably work with other teensies with small modifications.

It basically allows you to map individual tracks from a MIDI file to be triggered by keys on your MIDI controller

Anything not already mapped is passed through, allowing you to pu...

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ST7789_t3.h Inverted TFT mirror effect
Hello everyone,
I'm using a Teensy 4.0 with a 240 x 240 px TFT display. I have:

#include <Adafruit_GFX.h>
#include <ST7735_t3.h>
#include <ST7789_t3.h>

No display issues; everything works perfectly.

But how do I create a mirror effect?
Like when I write or draw on a piece of paper and look at it in a mirror. I didn’t ...

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How to program a blank MKL02 bootloader chip for a custom MK20DX256 board? No USB response on my new board
Hello PJRC team,

I am working on a new custom board based on MK20DX256VLH7 with an MKL02 bootloader chip, following a Teensy-style design.

At the moment, when I connect the board to USB, there is no response at all on the PC side. Nothing appears in Device Manager, and I do not see any meaningful USB activity.
I am now trying to confirm...

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