Teensy Libraries

Teensy Libraries

Here are some libraries written by Teensy users that are not (yet) incorporated in the main Teensydunio releases:

Teensy 4.0/4.1 Power button support

This library provides tools to modify the on/off pin in the Teensy 4.0 and 4.1.

• T4_PowerButton was written by Frank Boesing (FrankB)
• https://github.com/FrankBoesing/T4_PowerButton.git

Arduino Teensy Codec lib

Audiolibrary plugin, plays up to 320 kbps MP3, MP4(AAC), M4A(AAC), AAC-Raw or FLAC in software without external hardware - with only 48MHz.

• Arduino-Teensy-Codec-lib was written by Frank Boesing (FrankB)
• Optimized for ARM Thumb2.
• Play from SD, built-in Flash or optional serial Flash (with audio-shield)
• Flac 4-24 BIT, (Teensy <= 3.2: Blocksize 128-1024 Bytes)
• planned: OPUS decoder (new codec, the best so far. Great Specs.) http://opus-codec.org/comparison/ streaming audio
• HINT: -O2 gives much better performance
• https://github.com/FrankBoesing/Arduino-Teensy-Codec-lib.git

SdFat beta

Warning: This is an early beta version of SdFat Version 2.

• SdFat-beta was written by Bill Greiman.
• This library is in early development and features may change. It will clearly have bugs. I am posting this version to get comments and help finding bugs/compatibility problems.
• You can help by posting issues for problems you find. I am doing a great deal of testing but actual applications make the best test cases.
• SdFat Version 2 supports FAT16/FAT32 and exFAT SD cards. It is mostly backward compatible with SdFat Version 1 for FAT16/FAT32 cards.
• exFAT supports files larger than 4GB so files sizes and positions are type uint64_t for classes that support exFAT.
• exFAT has many features not available in FAT16/FAT32. exFAT has excellent support for contiguous files on flash devices and supports preallocation.
• If the SD card is the only SPI device, use dedicated SPI mode. This can greatly improve performance. See the bench example.
• https://github.com/greiman/SdFat-beta.git