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-rw-r--r--Makefile.lib20
-rw-r--r--core.nix42
-rw-r--r--flake.lock27
-rw-r--r--flake.nix19
-rw-r--r--test.nix28
-rw-r--r--test/Makefile26
-rw-r--r--test/blink.cpp13
-rw-r--r--test/counter.cpp19
8 files changed, 194 insertions, 0 deletions
diff --git a/Makefile.lib b/Makefile.lib
new file mode 100644
index 0000000..ce5787c
--- /dev/null
+++ b/Makefile.lib
@@ -0,0 +1,20 @@
+MCU = IMXRT1062
+MCU_DEF = ARDUINO_TEENSY40
+
+OPTIONS = -DF_CPU=600000000 -DUSB_SERIAL -DLAYOUT_US_ENGLISH
+OPTIONS += -D__$(MCU)__ -DARDUINO=10813 -DTEENSYDUINO=154 -D$(MCU_DEF)
+
+CPU_OPTIONS = -mcpu=cortex-m7 -mfloat-abi=hard -mfpu=fpv5-d16 -mthumb
+
+CPPFLAGS = -Wall -g -O2 $(CPU_OPTIONS) -MMD $(OPTIONS) -I. -ffunction-sections -fdata-sections -I.
+CXXFLAGS = -std=gnu++14 -felide-constructors -fno-exceptions -fpermissive -fno-rtti -Wno-error=narrowing
+
+C_FILES := $(wildcard *.c)
+CPP_FILES := $(wildcard *.cpp)
+OBJS := $(C_FILES:.c=.o) $(CPP_FILES:.cpp=.o)
+
+C_FILES := $(wildcard *.c)
+CPP_FILES := $(wildcard *.cpp)
+OBJS := $(C_FILES:.c=.o) $(CPP_FILES:.cpp=.o)
+
+all: $(OBJS) \ No newline at end of file
diff --git a/core.nix b/core.nix
new file mode 100644
index 0000000..6a98e55
--- /dev/null
+++ b/core.nix
@@ -0,0 +1,42 @@
+{ pkgs, ... }:
+
+pkgs.stdenvNoCC.mkDerivation rec {
+ name = "teensy-core";
+ version = "1.54";
+
+ src = pkgs.fetchFromGitHub {
+ owner = "PaulStoffregen";
+ repo = "cores";
+ rev = "${version}";
+ sha256 = "6IXKPVc06WCjJDOnDFOOqjPZSt4UhRW7LHyblEaZ7fw=";
+ };
+
+ buildInputs = with pkgs; [
+ binutils
+ gcc-arm-embedded
+ ];
+
+ buildPhase = ''
+ export CC=arm-none-eabi-gcc
+ export CXX=arm-none-eabi-g++
+
+ pushd teensy4
+ rm main.cpp
+ cp ${./Makefile.lib} Makefile
+ make
+ ar rvs libteensy-core.a *.o
+ popd
+ '';
+
+ installPhase = ''
+ mkdir -p $out/{include,lib}
+ pushd teensy4
+ cp -r *.h $out/include/
+ cp -r avr $out/include/
+ cp -r debug $out/include/
+ cp -r util $out/include/
+ cp libteensy-core.a $out/lib/
+ cp imxrt1062.ld $out/lib/
+ popd
+ '';
+}
diff --git a/flake.lock b/flake.lock
new file mode 100644
index 0000000..b87a192
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,27 @@
+{
+ "nodes": {
+ "nixpkgs": {
+ "locked": {
+ "lastModified": 1633709683,
+ "narHash": "sha256-KVJEToVd6SuUqc2XFIpfSjns07orqEWzIq9AcF/SIf8=",
+ "owner": "NixOS",
+ "repo": "nixpkgs",
+ "rev": "ce7a1190a0fa4ba3465b5f5471b08567060ca14c",
+ "type": "github"
+ },
+ "original": {
+ "owner": "NixOS",
+ "ref": "nixos-21.05",
+ "repo": "nixpkgs",
+ "type": "github"
+ }
+ },
+ "root": {
+ "inputs": {
+ "nixpkgs": "nixpkgs"
+ }
+ }
+ },
+ "root": "root",
+ "version": 7
+}
diff --git a/flake.nix b/flake.nix
new file mode 100644
index 0000000..03109f4
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,19 @@
+{
+ description = "Build environment for Teensy 4.0";
+
+ inputs = {
+ nixpkgs.url = github:NixOS/nixpkgs/nixos-21.05;
+ };
+
+ outputs = { self, nixpkgs, ... }: let
+ system = "x86_64-linux";
+ pkgs = import nixpkgs { inherit system; };
+
+ teensy-core = import ./core.nix { inherit pkgs; };
+ teensy-test = import ./test.nix { inherit pkgs teensy-core; };
+ in {
+ packages.${system} = {
+ inherit teensy-core teensy-test;
+ };
+ };
+}
diff --git a/test.nix b/test.nix
new file mode 100644
index 0000000..e6329a8
--- /dev/null
+++ b/test.nix
@@ -0,0 +1,28 @@
+{ pkgs, teensy-core, ... }:
+
+pkgs.stdenv.mkDerivation rec {
+ name = "teensy-test";
+
+ src = ./test;
+
+ buildInputs = with pkgs; [
+ gcc-arm-embedded
+ teensy-core
+ ];
+
+ buildPhase = ''
+ export CC=arm-none-eabi-gcc
+ export CXX=arm-none-eabi-g++
+ export OBJCOPY=arm-none-eabi-objcopy
+ export SIZE=arm-none-eabi-size
+
+ export LDFLAGS="-T${teensy-core}/lib/imxrt1062.ld -L${teensy-core}/lib"
+
+ make
+ '';
+
+ installPhase = ''
+ mkdir $out
+ cp *.hex $out/
+ '';
+}
diff --git a/test/Makefile b/test/Makefile
new file mode 100644
index 0000000..0891b70
--- /dev/null
+++ b/test/Makefile
@@ -0,0 +1,26 @@
+MCU = IMXRT1062
+MCU_DEF = ARDUINO_TEENSY40
+
+OPTIONS = -DF_CPU=600000000 -DUSB_SERIAL -DLAYOUT_US_ENGLISH
+OPTIONS += -D__$(MCU)__ -DARDUINO=10813 -DTEENSYDUINO=154 -D$(MCU_DEF)
+
+CPU_OPTIONS = -mcpu=cortex-m7 -mfloat-abi=hard -mfpu=fpv5-d16 -mthumb
+
+CPPFLAGS = $(NIX_CFLAGS_COMPILE) -Wall -g -O2 $(CPU_OPTIONS) -MMD $(OPTIONS) -I. -ffunction-sections -fdata-sections
+CXXFLAGS = -std=gnu++20 -felide-constructors -fno-exceptions -fpermissive -fno-rtti -Wno-error=narrowing
+
+LDFLAGS += -Os -Wl,--gc-sections,--relax $(CPU_OPTIONS)
+
+LIBS = -lm -lstdc++ -lteensy-core
+
+CPP_FILES := $(wildcard *.cpp)
+TARGETS := $(CPP_FILES:.cpp=.hex)
+
+%.elf: %.o
+ $(CC) $(LDFLAGS) -o $@ $< $(LIBS)
+
+%.hex: %.elf
+ $(SIZE) $<
+ $(OBJCOPY) -O ihex -R .eeprom $< $@
+
+all: $(TARGETS)
diff --git a/test/blink.cpp b/test/blink.cpp
new file mode 100644
index 0000000..ec7b3bd
--- /dev/null
+++ b/test/blink.cpp
@@ -0,0 +1,13 @@
+#include <Arduino.h>
+
+extern "C" int main(void) {
+ pinMode(13, OUTPUT);
+
+ while (true) {
+ digitalWrite(13, HIGH);
+ delay(500);
+ digitalWrite(13, LOW);
+ delay(500);
+ }
+}
+
diff --git a/test/counter.cpp b/test/counter.cpp
new file mode 100644
index 0000000..680e233
--- /dev/null
+++ b/test/counter.cpp
@@ -0,0 +1,19 @@
+#include <Arduino.h>
+
+extern "C" int main(void) {
+ for (unsigned iPin=16; iPin <= 20; ++iPin) {
+ pinMode(iPin, OUTPUT);
+ }
+
+ std::size_t i = 0;
+
+ while (true) {
+ digitalWrite(16, (i % 2) > 0);
+ digitalWrite(17, (i % 4) > 1);
+ digitalWrite(18, (i % 8) > 3);
+ digitalWrite(19, (i % 16) > 7);
+ digitalWrite(20, (i % 32) > 15);
+ delay(analogRead(7));
+ i++;
+ }
+}