Add AssemblyScript for Arduino Blink (#62)

Related to #57

platforms/arduino_blink/README.md

@@ -1,10 +1,10 @@
 ## Arduino blink example
 
-This example was tested with ESP32.  
+This example was tested with ESP32.
 ESP8266 is almost working (just needs a workaround for 64KiB wasm pages).
 
-`PlatformIO` is used to build the host interpreter.  
-You can change the LED pin number in `platformio.ini` with `-DLED_BUILTIN` option.  
+`PlatformIO` is used to build the host interpreter.
+You can change the LED pin number in `platformio.ini` with `-DLED_BUILTIN` option.
 
 To run the example on ESP32:
 
@@ -14,9 +14,9 @@ pio run -e esp32 -t upload && pio device monitor
 
 ## C++ app
 
-`./wasm_cpp` directory contains an example Arduino app (sketch) that is compiled to WebAssembly.  
-Compilation is performed using `wasicc` here, but `clang --target=wasm32` can be used as well.  
-The resulting `wasm` binary is then converted to a C header using `xxd`.  
+`./wasm_cpp` directory contains an example Arduino app (sketch) that is compiled to WebAssembly.
+Compilation is performed using `wasicc` here, but `clang --target=wasm32` can be used as well.
+The resulting `wasm` binary is then converted to a C header using `xxd`.
 See `wasm_cpp/build.sh` for details.
 
 ## Rust app
@@ -28,9 +28,20 @@ rustup target add wasm32-unknown-unknown
 ```
 To rebuild, use `wasm_rust/build.sh`.
 
+## AssemblyScript app
+
+For AssemblyScript the LED pin is currently hardcoded in the app.
+Before building the app, please install npm dependencies:
+```sh
+yarn install
+```
+or
+```sh
+npm install
+```
+To rebuild, use `wasm_assemblyscript/build.sh` or `npm run build`.
 
 ## TinyGO app
 
 For TinyGO, the LED pin is currently hardcoded in the app.
-To rebuild, use `wasm_tinygo/build.sh`.
-
+To rebuild, use `wasm_tinygo/build.sh`.

platforms/arduino_blink/src/main.cpp

@@ -15,6 +15,9 @@
 // Rust app
 //#include "../wasm_rust/app.wasm.h"
 
+// AssemblyScript app
+//#include "../wasm_assemblyscript/app.wasm.h"
+
 // TinyGO app. For this, change _start to cwa_main below
 //#include "../wasm_tinygo/app.wasm.h"
 

platforms/arduino_blink/wasm_assemblyscript/app.ts

@@ -0,0 +1,42 @@
+@external("arduino", "millis")
+declare function millis(): u32;
+
+@external("arduino", "delay")
+declare function delay(ms: u32): void;
+
+@external("arduino", "pinMode")
+declare function pinMode(pin: u32, mode: u32): void;
+
+@external("arduino", "digitalWrite")
+declare function digitalWrite(pin: u32, value: u32): void;
+
+@external("arduino", "getPinLED")
+declare function getPinLED(): u32;
+
+const LOW: u32  = 0;
+const HIGH: u32 = 1;
+
+const INPUT: u32        = 0x0;
+const OUTPUT: u32       = 0x1;
+const INPUT_PULLUP: u32 = 0x2;
+
+const LED: u32 = 19;
+
+function setup(): void {
+  pinMode(LED, OUTPUT);
+}
+
+function run(): void {
+  digitalWrite(LED, HIGH);
+  delay(100);
+  digitalWrite(LED, LOW);
+  delay(900);
+}
+
+/*
+ * Entry point
+ */
+export function _start(): void {
+  setup();
+  while (1) run();
+}

platforms/arduino_blink/wasm_assemblyscript/app.wasm.h

@@ -0,0 +1,16 @@
+unsigned char app_wasm[] = {
+  0x00, 0x61, 0x73, 0x6d, 0x01, 0x00, 0x00, 0x00, 0x01, 0x0d, 0x03, 0x60,
+  0x02, 0x7f, 0x7f, 0x00, 0x60, 0x00, 0x00, 0x60, 0x01, 0x7f, 0x00, 0x02,
+  0x3a, 0x03, 0x07, 0x61, 0x72, 0x64, 0x75, 0x69, 0x6e, 0x6f, 0x07, 0x70,
+  0x69, 0x6e, 0x4d, 0x6f, 0x64, 0x65, 0x00, 0x00, 0x07, 0x61, 0x72, 0x64,
+  0x75, 0x69, 0x6e, 0x6f, 0x0c, 0x64, 0x69, 0x67, 0x69, 0x74, 0x61, 0x6c,
+  0x57, 0x72, 0x69, 0x74, 0x65, 0x00, 0x00, 0x07, 0x61, 0x72, 0x64, 0x75,
+  0x69, 0x6e, 0x6f, 0x05, 0x64, 0x65, 0x6c, 0x61, 0x79, 0x00, 0x02, 0x03,
+  0x02, 0x01, 0x01, 0x05, 0x03, 0x01, 0x00, 0x00, 0x07, 0x13, 0x02, 0x06,
+  0x6d, 0x65, 0x6d, 0x6f, 0x72, 0x79, 0x02, 0x00, 0x06, 0x5f, 0x73, 0x74,
+  0x61, 0x72, 0x74, 0x00, 0x03, 0x0a, 0x27, 0x01, 0x25, 0x00, 0x41, 0x13,
+  0x41, 0x01, 0x10, 0x00, 0x03, 0x40, 0x41, 0x13, 0x41, 0x01, 0x10, 0x01,
+  0x41, 0xe4, 0x00, 0x10, 0x02, 0x41, 0x13, 0x41, 0x00, 0x10, 0x01, 0x41,
+  0x84, 0x07, 0x10, 0x02, 0x0c, 0x00, 0x00, 0x0b, 0x00, 0x0b
+};
+unsigned int app_wasm_len = 154;

platforms/arduino_blink/wasm_assemblyscript/build.sh

@@ -0,0 +1,12 @@
+# Compile
+npx asc app.ts -b app.wasm  \
+  -O3z                      \
+  --runtime half            \
+  --noAssert                \
+  --use abort=
+
+# Convert to WAT
+#wasm2wat app.wasm -o app.wat
+
+# Convert to C header
+xxd -i app.wasm > app.wasm.h

platforms/arduino_blink/wasm_assemblyscript/package.json

@@ -0,0 +1,9 @@
+{
+  "scripts": {
+    "build": "npm run asbuild:optimized && xxd -i app.wasm > app.wasm.h",
+    "asbuild:optimized": "npx asc app.ts -b app.wasm -O3z --runtime half --noAssert --use abort="
+  },
+  "devDependencies": {
+    "assemblyscript": "^0.8.1-nightly.20200119"
+  }
+}

platforms/arduino_blink/wasm_assemblyscript/tsconfig.json

@@ -0,0 +1,6 @@
+{
+  "extends": "./node_modules/assemblyscript/std/assembly.json",
+  "include": [
+    "./**/*.ts"
+  ]
+}

platforms/arduino_blink/wasm_assemblyscript/yarn.lock

@@ -0,0 +1,21 @@
+# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
+# yarn lockfile v1
+
+
+assemblyscript@^0.8.1-nightly.20200119:
+  version "0.8.1-nightly.20200119"
+  resolved "https://registry.yarnpkg.com/assemblyscript/-/assemblyscript-0.8.1-nightly.20200119.tgz#8b62ce969a3e00e2fe7108802b25d17425723a2f"
+  integrity sha512-KxIM7zmTz67Fo0Tjz0uUKcGXXZ9JS8upkvrChoe2bnVlYPWrGufKFCpGgGivClhOX2u49KvF99tAdQBKK2h3/A==
+  dependencies:
+    binaryen "90.0.0-nightly.20200101"
+    long "^4.0.0"
+
+binaryen@90.0.0-nightly.20200101:
+  version "90.0.0-nightly.20200101"
+  resolved "https://registry.yarnpkg.com/binaryen/-/binaryen-90.0.0-nightly.20200101.tgz#75fb065e4a2dd88852c2872085e05eee0883106c"
+  integrity sha512-64lgruunUnkJD4YVD0DLCSRskqfo3xhoErM1H22GfkkWNT16/7tPTLG+MYqKLMALTiIyLL6L9UqmDaxOxDv0rw==
+
+long@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/long/-/long-4.0.0.tgz#9a7b71cfb7d361a194ea555241c92f7468d5bf28"
+  integrity sha512-XsP+KhQif4bjX1kbuSiySJFNAehNxgLb6hPRGJ9QsUr8ajHkuXGdrHmFUTUUXhDwVX2R5bY4JNZEwbUiMhV+MA==