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Added C++ template extension (outside of pack - headers available from github repository) Added new compilation defines (ARM_DSP_ATTRIBUTE, ARM_DSP_TABLE_ATTRIBUTE and ARM_DSP_CUSTOM_CONFIG) Solved several github issues; Corrected wrong version number in pack for v1.16.0; Corrected issue #201 in v1.16.1 (related to new ARM_DSP_ATTRIBUTE)
- Specifications
- Software
- Processor
- Pins
- Digital Pins
- Analog Pins
- Communication
- Displays
- Audio
- Lights & LEDs
ARM Cortex-M7 at 600 MHzFloat point math unit, 64 & 32 bits7936K Flash, 1024K RAM (512K tightly coupled), 4K EEPROM (emulated)QSPI memory expansion, locations for 2 extra RAM or Flash chipsArduino IDE + Teensyduino
1. Arduino's IDE software with the Teensyduino add-onis the primary programming environment for Teensy. OnWindows, Linux and old Macs, Arduino is installed firstand then the Teensyduino installer adds Teensy support tothe Arduino IDE. On newer Macs, an all-in-one downloadis provided.Teensyduino includes a large collection of libraries whichare tested and optimized for Teensy. Other libraries maybe installed manually or by Arduino's library manager.
Visual Micro
1. Visual Microallows use ofMicrosoft Visual Studio to program Arduino compatible boards, including Teensy.Only Windows is supported. Visual Micro is commercial paid software.
PlatformIO
1. PlatformIO IDEisa cross platform development environment with many advanced features.Windows, Linux and Macintosh are supported.
Performance
1. ARM Cortex-M7 brings many powerful CPU features to a true real-time microcontrollerplatform. CPU performance is many times faster than typical 32 bit microcontrollers.
Dual Issue Superscaler Architecture
1. Cortex-M7 is a dual-issue superscaler processor, meaning M7 can execute 2 instructionsper clock cycle, at 600 MHz! Of course, executing 2 simultaneously depends upon the compilerordering instructions and registers. Initial benchmarks have shown C++ code compiled byArduino tends to achieve 2 instructions about 40% to 50% of the time while performingnumerically intensive work using integers and pointers.
Floating Point Unit
1. The FPU performs 32 bit float and 64 bit double precision math in hardware.32 bit float speed is approximately the same speed as integer math. 64 bitdouble precision runs at half the speed of 32 bit float.
This pinout reference card comes with Teensy 4.1. Pinout Card Files:Front Side (PDF) /Back Side(PDF) Cards printed before September 2021 incorrectly showed pin 53 with PWM. A larger, more detailed pinout chartby KurtE is also available on the forum.
Digital Input Pins
1. Digital pinsmay be used to receive signals. Teensy 4.1 pins default toINPUT most with a "keeper" resistor.Teensy 4.1 pins accept 0 to 3.3Vsignals. The pins are not 5V tolerant. Do not drive any digital pin higherthan 3.3V.
Input Pullup / Pulldown / Keeper Resistors
1. All digital pins have optional pullup, pulldown, or keeper resistors.These are used to keep the pin at logic HIGH or logic LOW or the samelogic level when it is not beingactively driven by external circuity. Normally these resistors are usedwith pushbuttons & switches.The pinMode function with INPUT_PULLUP or INPUT_PULLDOWN must be used toconfigure these pins to input mode with the built-in resistor.
Pin Change Interrupts
1. All digital pins can detect changes. Use attachInterrupt to causea function to be run automatically. Interrupts should only be used forclean signals. TheBounce libraryis recommended for detecting changeson pushbuttons, switches, and signals with noise or mechanical chatter.
Analog Inputs
1. 18 pins can be used an analog inputs, for reading sensors or otheranalog signals. Basic analog input is done with the analogRead function.The default resolution is 10 bits (input range 0 to 1023), but can beadjusted with analogReadResolution. The hardware allows up to 12 bitsof resolution, but in practice only up to 10 bits are normally usabledue to noise.More advanced use is possible with the ADC library.
Analog Range
1. The analog input range is fixed at 0 to 3.3V. On Teensy 4.1,the analogReference() function has no effect. The analog pinsare not 5V tolerant. Do not drive any analog pin higher than 3.3 volts.
Analog Comparators
1. These comparators allow an analog signal to be converted todigital, with a precisely defined voltage threshold for logiclow versus high.
USB Device
1. Teensy's primary communication is its main USB port, which operatates in USB device /peripheral mode at 480 Mbit/sec speed. The Teensyduino software supports many differenttypes of USB communication to your PC or Mac, selected by the Tools > USB Type menu.Several of these devices types may be used simultaneously.
USB Host
1. A second USB port operates in host mode, which allows you to connect USBdevices to Teensy 4.1. It is fully independent of the main USB device port, soUSB devices you connect on the host port can simultaeously communicate withTeensy while Teensy communicates with your computer via the USB device port.This USB host port runs at 480, 12 or 1.5 Mbit/sec, depending onthe speed if the device you connect. USB hubs may be used to connect manyUSB devices. TheUSBHost_t36 libraryis used for the USB h...
Serial
1. 8 serial portsallow you to connect serial devices, such as MIDI,GPS receivers, DMX lighting, ESP wireless modules, etc. All 8 serial portsare fully independent and can transfer data simultaneously. None areshared with USB (as is done on some Arduino boards). All 8 portsinclude FIFOs for better performance at high speed baud rates.
ILI9341 320x240 Color TFT
1. These displays are the best supported on Teensy 4.1, with multiple highperformance libraries for fast updates speed.ILI9341is usually the bestdisplay to use, due to superior software support.
ST7735 Color TFT
1. These displays are slightly smaller and lower resolution than ILI9341.Highly optimized libaries for ST7735 & ST7789 allow these to also performvery well.
SSD1306 Monochrome OLED
1. These small displays are very popular and well supported.
Audio Shieldconverts I2S digital audio to analog stereo input & output. I2S / TDM 1. Most commonly used with the audio shield,2 digital audio ports can simultaneously transmit and receive up to8 audio channels using I2S protocol, or up to 16 channels usingTDM.Alternately, a special format used by inexpensivePT8211 DACchips can be used. 1.1. I2SI- 1...
OctoWS2811 Librarycontrolling 1920 WS2812B RGB LEDs at 30 Hz refresh rate WS2812B / NeoPixel 1. Two high performance non-blocking libraries support use of WS2812B LEDs.OctoWS2811transmits any number of outputs in parallel, allowing almost any number LEDs to berefreshed at up to 30 Hz video rate. On Teensy 4.1, OctoWS2811 supports useof any number o...
Q-SYS Designer Software is the most powerful yet simple advanced DSP design software on the market today. This software enables the user to create designs for native Q-SYS Platform system and also supports the integration of the greater Q-SYS Ecosystem. The system design environment was created specifically to be intuitive and easy to use.
Version 1.16.2: July 29, 2024. Recommended. Get Pack. * Improvements to documentation. * Added arm_fir_decimate_f64. * Removed some gcc workarounds that are no more needed for Helium. * Removed redundant test in arm_atan2_q15 and arm_atan2_q31. * Replaced INFINITY by maximum positive float.
Nov 3, 2015 · Maintenance Release Version 4.3.0: CMSIS-Core 4.10 (Cortex-M7 extended Cache Maintenance functions) CMSIS-DSP 1.4.5 (see revision history for details)
May 2, 2022 · Announcement. Users of CMSIS-DSP and CMSIS-NN. We are planning to move these components off the CMSIS base pack and repository! The components will be continued in the same way but relocated into their own GitHub repositories. Releases of these components will be provided as individual packs.
CMSIS-NN: 3.1.0 (see revision history for details) - Support for int16 convolution and fully connected for reference implementation. - Support for DSP extension optimization for int16 convolution and fully connected. - Support dilation for int8 convolution.
