![]() ![]() Perhaps best of all, it is compatible with the popular Arduino IDE programming environment as well as many of the existing Arduino libraries, so it is very easy to get up and running unlike many other advanced microcontrollers that are available. It is formatted into a compact ‘teensy’ board outline for easy embedding into projects or for use with solderless breadboards. While I only focused on Teensy 4.0 it should be easy to adapt to other versions by changing the compiler flags using PaulStoffregen/cores as a reference.Teensy 3.2 is based on the 32-bit 72MHz ARM Cortex-M4 processor. 59999> (* 21 2)Īs always, the code of everything discussed here is available via Git on. Ĭonnecting finally via serial terminal screen /dev/ttyACM0 9600 we end up in a LISP environment where we can play around with the microcontroller at our leisure without reflashing. So we are now able to build and flash uLisp onto a conveniently attached Teensy 4.0 board using only: nix flake clone git +https :// /teensy -env -dest. This is realized by the following function based on the teensy-core derivation and a default makefile: build = name: source: rec For the result only headers, common flags and the linker script IMXRT1062.ld are exported.Īs existing Arduino sketches commonly consist of a single C++ file (ignoring some non-standard stuff for later) most builds can be handled generically by a mapping of *.cpp files into flashable *.hex files. It clones a given version of the library repository, jumps to the teensy4 directory, deletes the example main.cpp file to exclude it from the library and applies a Makefile adapted from the default one. Correspondingly, the derivation for the core library core.nix is straight forward. ![]() OPTIONS += -D_$(MCU)_ -DARDUINO=10813 -DTEENSYDUINO=154 -D$(MCU_DEF)ĬPU_OPTIONS = -mcpu=cortex-m7 -mfloat-abi=hard -mfpu=fpv5-d16 -mthumbĬPPFLAGS = -Wall -g -O2 $(CPU_OPTIONS) -MMD $(OPTIONS) -ffunction-sections -ĬXXFLAGS = -felide-constructors -fno-exceptions -fpermissive -fno-rtti -Wno-Įrror=narrowing into a run-of-the-mill Makefile and relying on the arm-none-eabi-gcc compiler. OPTIONS = -DF_CPU=600000000 -DUSB_SERIAL -DLAYOUT_US_ENGLISH The adapted version of the Arduino library is available on Github and can be compiled into a shared library using flags MCU = IMXRT1062 ![]() ![]() Roughly following what others did for Teensy 3.1 while adapting it to Teensy 4.0 and Nix flakes it is simple to build and flash some basic C++ programs onto a USB-attached board. In this vein it would also be nice to use my accustomed Nix-based toolchain which leads me to this article. While I appreciate the rich and accessible software ecosystem for this platform, I don't really want to use some special IDE, applying amongst other things 1 weird non-standard preprocessing to my code. Driven by the goal of building and programming a fancy mechanical keyboard (as it seems to be the trendy thing to do) I chose the Arduino-compatible Teensy 4.0 board. Since the last time that I had any real contact with this area was probably around a decade ago - programming an ASURO robot - I started basically from scratch. So for a change of scenery I recently started to mess around with microcontrollers again. » Octo| cpp development english nix | Adrian Kummerländer » Reproducible development environment for Teensy ![]()
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