Teensy

Configuration

platform = teensy

Teensy is a complete USB-based microcontroller development system, in a very small footprint, capable of implementing many types of projects. All programming is done via the USB port. No special programmer is needed, only a standard USB cable and a PC or Macintosh with a USB port.

For more detailed information please visit vendor site.

Configuration

Optimization

(valid only for Teensy LC, Teensy 3.0-3.6)

You can control firmware optimization via special macro/define using build_flags in “platformio.ini” (Project Configuration File):

  • -D TEENSY_OPT_FASTER, default

  • -D TEENSY_OPT_FASTER_LTO

  • -D TEENSY_OPT_FAST

  • -D TEENSY_OPT_FAST_LTO

  • -D TEENSY_OPT_FASTEST

  • -D TEENSY_OPT_FASTEST_LTO

  • -D TEENSY_OPT_FASTEST_PURE_CODE, valid only for Teensy 3.5-3.6

  • -D TEENSY_OPT_FASTEST_PURE_CODE_LTO, valid only for Teensy 3.5-3.6

  • -D TEENSY_OPT_DEBUG

  • -D TEENSY_OPT_DEBUG_LTO

  • -D TEENSY_OPT_SMALLEST_CODE

  • -D TEENSY_OPT_SMALLEST_CODE_LTO

The only one macro can be used in per one build environment. Also, you can see verbose build using -v, --verbose option for pio run command.

Example:

Let’s set optimization for the smallest code

[env:teensy_hid_device]
platform = teensy
framework = arduino
board = teensy36
build_flags = -D TEENSY_OPT_SMALLEST_CODE

USB Features

If you want to use Teensy USB Features, you need to add special macro/define using build_flags:

  • -D USB_SERIAL

  • -D USB_KEYBOARDONLY

  • -D USB_TOUCHSCREEN

  • -D USB_HID_TOUCHSCREEN

  • -D USB_HID

  • -D USB_SERIAL_HID

  • -D USB_MIDI

  • -D USB_MIDI4

  • -D USB_MIDI16

  • -D USB_MIDI_SERIAL

  • -D USB_MIDI4_SERIAL

  • -D USB_MIDI16_SERIAL

  • -D USB_AUDIO

  • -D USB_MIDI_AUDIO_SERIAL

  • -D USB_MIDI16_AUDIO_SERIAL

  • -D USB_MTPDISK

  • -D USB_RAWHID

  • -D USB_FLIGHTSIM

  • -D USB_FLIGHTSIM_JOYSTICK

  • -D USB_EVERYTHING

  • -D USB_DISABLED

A default macro is set to -D USB_SERIAL if no one is specified.

Example:

[env:teensy_hid_device]
platform = teensy
framework = arduino
board = teensy20
build_flags = -D USB_RAWHID

See Teensy USB Examples.

Uploading using CLI

By default the Teensy platform uses the graphical version of the Teensy upload tools. For cases where the GUI tools cannot be used (e.g. headless OS) the native Teensy Loader tool is also available in a command line version which can be enabled directly in your project configuration, for example:

[env:teensy36]
platform = teensy
framework = arduino
board = teensy36
upload_protocol = teensy-cli

Debugging

Debugging - “1-click” solution for debugging with a zero configuration.

Tools & Debug Probes

Supported debugging tools are listed in “Debug” column. For more detailed information, please scroll table by horizontal. You can switch between debugging Tools & Debug Probes using debug_tool option in “platformio.ini” (Project Configuration File).

Warning

You will need to install debug tool drivers depending on your system. Please click on compatible debug tool below for the further instructions.

External Debug Tools

Boards listed below are compatible with Debugging but DEPEND ON external debug probe. They ARE NOT READY for debugging. Please click on board name for the further details.

Name

MCU

Frequency

Flash

RAM

SparkFun MicroMod Teensy

IMXRT1062

600MHz

7.75MB

512KB

Teensy 3.1 / 3.2

MK20DX256

72MHz

256KB

64KB

Teensy 3.5

MK64FX512

120MHz

512KB

255.99KB

Teensy 3.6

MK66FX1M0

180MHz

1MB

256KB

Teensy 4.0

IMXRT1062

600MHz

1.94MB

512KB

Teensy 4.1

IMXRT1062

600MHz

7.75MB

512KB

Teensy LC

MKL26Z64

48MHz

62KB

8KB

Stable and upstream versions

You can switch between stable releases of Teensy development platform and the latest upstream version using platform option in “platformio.ini” (Project Configuration File) as described below.

Stable

; Latest stable version
[env:latest_stable]
platform = teensy
board = ...

; Custom stable version
[env:custom_stable]
platform = teensy@x.y.z
board = ...

Upstream

[env:upstream_develop]
platform = https://github.com/platformio/platform-teensy.git
board = ...

Packages

Name

Description

framework-arduinoteensy

Arduino Wiring-based Framework for Teensy boards

framework-mbed

Arm Mbed OS is a platform operating system designed for the internet of things

tool-jlink

Software and Documentation Pack for SEGGER J-Link debug probes

tool-teensy

Upload tools for Teensy boards

toolchain-atmelavr

GCC Toolchain for Microchip AVR microcontrollers

toolchain-gccarmnoneeabi

GNU toolchain for Arm Cortex-M and Cortex-R processors

Warning

Linux Users:

Windows Users:

Teensy programming uses only Windows built-in HID drivers. When Teensy is programmed to act as a USB Serial device, Windows XP, Vista, 7 and 8 require this serial driver is needed to access the COM port your program uses. No special driver installation is necessary on Windows 10.

Frameworks

Name

Description

Arduino

Arduino Wiring-based Framework allows writing cross-platform software to control devices attached to a wide range of Arduino boards to create all kinds of creative coding, interactive objects, spaces or physical experiences

Mbed

Arm Mbed OS is an open source embedded operating system designed specifically for the ‘things’ in the Internet of Things. It includes all the features you need to develop a connected product based on an Arm Cortex-M microcontroller, including security, connectivity, an RTOS and drivers for sensors and I/O devices

Boards

Note

SparkFun

Name

Debug

MCU

Frequency

Flash

RAM

SparkFun MicroMod Teensy

External

IMXRT1062

600MHz

7.75MB

512KB

Teensy

Name

Debug

MCU

Frequency

Flash

RAM

Teensy 2.0

No

ATMEGA32U4

16MHz

31.50KB

2.50KB

Teensy 3.0

No

MK20DX128

48MHz

128KB

16KB

Teensy 3.1 / 3.2

External

MK20DX256

72MHz

256KB

64KB

Teensy 3.5

External

MK64FX512

120MHz

512KB

255.99KB

Teensy 3.6

External

MK66FX1M0

180MHz

1MB

256KB

Teensy 4.0

External

IMXRT1062

600MHz

1.94MB

512KB

Teensy 4.1

External

IMXRT1062

600MHz

7.75MB

512KB

Teensy LC

External

MKL26Z64

48MHz

62KB

8KB

Teensy++ 2.0

No

AT90USB1286

16MHz

127KB

8KB