No special programmer circuit is needed: all programming is done through USB using a proprietary host program and bootloader. specialized DMA engines built in. Random Number Generator True random number hardware is capable of generating random Teensy 4.1: Primary XBAR Pins 1, 2, 3, 4, 5, 7, 8, 30, 31, 32, 33 - Alt Pins: 0, 36, 37, 42, 43, 44, 45, 46, 47

Reducing CPU speed to 528 MHz or lower reduces power consumption. Low Power Features Snooze library low versus high. Analog Outputs / Digital To Analog (DAC) One true analog output DAC is present on pin A12. On Linux, PJRC tests X86 & AARCH64 on Ubuntu and ARM32 on Raspbian. Other distros may work, but are not supported.

Breadboard Usage

The Teensy LC comes pre-flashed with a bootloader so you can program it using the on-board USB connection: No external programmer is needed! You can program for Teensy in your favourite program editor using C or you can install the Teensyduino add-on for the Arduino IDE and write Arduino sketches for Teensy!

USB MIDI receive example, Note on/off -> LED on/off // contributed by Alessandro Fasan int ledPin = 13 ; void OnNoteOn ( byte channel , byte note , byte velocity ) { digitalWrite ( ledPin , HIGH ) ; // Any Note-On turns on LED } void OnNoteOff ( byte channel , byte note , byte velocity ) { digitalWrite ( ledPin , LOW ) ; // Any Note-Off turns off LED } void setup ( ) { pinMode ( ledPin , OUTPUT ) ; usbMIDI . setHandleNoteOff ( OnNoteOff ) ; usbMIDI . setHandleNoteOn ( OnNoteOn ) ; digitalWrite ( ledPin , HIGH ) ; delay ( 400 ) ; // Blink LED once at startup digitalWrite ( ledPin , LOW ) ; } void loop ( ) { usbMIDI . read ( ) ; } Receiving Large System Exclusive Messages program loaded in Teensy's flash memory. Bootloader Chip Teensy LC's bootloader is stored in a dedicated chip. All

many types of libraries to work well when used together. Direct Memory Access (DMA) Teensy 3.2 has a general purpose 16 channel DMA controller. display to use, due to superior software support. ST7735 Color TFT These displays are slightly smaller and lower resolution than ILI9341.

Hookup wire. Stranded 7/0.2mm would be best, though solid core 1/0.6mm or something of a similar size would also work. Preferably of different colours, but not essential. many types of libraries to work well when used together. Direct Memory Access (DMA) Teensy 4.0 has a general purpose 32 channel DMA controller. Add libraries: Audio, FlexCAN, Adafruit_CC3000, SPIFlash, RadioHead, FastLED, Adafruit_ILI9341, ILI9431_t3, Artnet The Teensy 3 series (including the Teensy LC) have Freescale microcontrollers with ARM Cortex M-series CPUs.CR2032 Coin Cell connected to VBAT allows Teensy 4.0 to keep date / time while power is off Power USB Power Normally Teensy is powered by your PC or USB hub, through a USB cable. The code. The flash memory can also store read-only variables and arrays. RAM 8K of memory is available for variables and data. Functions

The PJRC forum provides access to excellent technical advice that is far more advanced than found on the normal Arduino forums. It is the best place to find information on how to use the advanced features found in the Teensy. It is not the place to get basic Arduino type questions answered however, which is good as the forum is not cluttered with ‘how do I blink an LED?’ type questions.Update Adafruit_CC3000, AccelStepper, Adafruit_GFX, Adafruit_SSD1306, FastLED, IRremote, Keypad, MFRC522, SoftPWM, SPIFlash In this tutorial I’m going to show you how to build a simple MIDI controller that consists of 8 retro arcade push buttons for sending MIDI message, as well as a toggle switch for choosing whether the arcade buttons send note message or CC messages. It may seem like this controller has limited functionality compared to commercial MIDI controllers, however this project will serve as a good introduction for developing more complex controllers but without throwing you in at the deep end. Here is a video example of what you’ll be building: