TinyJS on mbed. TinyJS is very simple JavaScript engine.
TinyJS on mbed
what's this ?
TinyJS is an extremely simple (under than 2000 lines) JavaScript interpreter engine.
I ported on mbed. but it restrict any features.
TinyJS project is https://github.com/gfwilliams/tiny-js
TinyJSは2000行以下で書かれた非常に小さいJavaScriptインタプリタエンジンです。
これをmbedに移植してみました。(ただし、いろいろ制限があります)
本家はこちら。 https://github.com/gfwilliams/tiny-js
how to use
You must use on serial terminal application by mbed serial USB.
baud is 57600bps
USBシリアルとして、ターミナルソフトを接続するとコンソールが表示されます。
ボーレートは57600bpsになってます。
functions
functions for mbed.
mbed用関数
- mbed.DigitalIn(pinName, mode)
- mbed.DigitalOut(pinName, val)
- mbed.AnalogIn(pinName)
- mbed.AnalogOut(pinName, val)
- mbed.InterruptIn(pinName, edge, mode, callback)
- mbed.TimerStart()
- mbed.TimerStop()
- mbed.TimerReset()
- mbed.TimerRead()
- mbed.Timeout(callback, t)
- mbed.wait(s)
- mbed.memfree()
sample JavaScript codes
DigitalOut
mbed.DigitalOut('LED1', 1); mbed.DigitalOut('LED2', 0); mbed.DigitalOut('LED3', 1); mbed.DigitalOut('LED4', 0);
LED1 = On, LED2=Off, LED3=On, ED4=Off
LED1 = 点灯、LED2=消灯、LED3=点灯、LED4=消灯
DigitalIn
print(mbed.DigitalIn('p5', 'PullUp'));
p5 is pull up, read, and print on console.
p5をPullUpして読みプリントする。
AnalogOut
mbed.AnalogOut('p18', 0.8);
p18 is analog output, value is 0.8.
p18を 値0.8でアナログ出力する。
AnalogIn
print(mbed.AnalogIn('p20'));
p20 is read analog voltage, and print on console.
p20をアナログ入力しプリントする。
InterruptIn
var led1 = 0; mbed.InterruptIn('p5', 'fall', 'PullUp', function() {led1 = !led1; mbed.DigitalOut('LED1', led1);});
Interrupt on p5, and ON/OFF does LED1.
p5で割り込んでLED1をON/OFFする。
Timeout and wait sample code
mbed.Timeout(function() {mbed.DigitalOut('LED1', 1);mbed.wait(3);mbed.DigitalOut('LED1', 0);}, 4);
LED1=on when wait for 4 seconds. and LED1=off for 3 seconds later.
LED1を4秒待って点灯して3秒後に消灯する。
memfree
print(mbed.memfree());
This prints the number of bytes of the remainder memory on mbed where TinyJS is usable.
これはTinyJSが使えるmbed上での残りメモリのバイト数をプリントアウトする。
LED Blinker by Timeout
blinker = function() {var led = 0; mbed.Timeout(function() {led = !led; mbed.DigitalOut('LED1', led);blinker();}, 0.5);}; blinker();
LED Blinker by Timeout.
Timeoutを使ったLチカ。
restrictions
- There is very little available memory. (Less than 9kbytes on LPC1768)
- Registration of InterruptIn is 4 limit.
- The loop to 8,192 times.
- The built-in functions (general JavaScript functions) that TinyJS prepares for for securing of memory is not included.
more, more, more ....
制限事項
- 利用できるメモリは非常に少ない。(LPC1768で9kbytes以下)
- InterruptInで登録できる割り込みは4つまで。4つを超えると1つめから順番に削除される。
- ループは8192回まで。
- メモリ確保のためTinyJSが用意している組み込み関数(一般的なJavaScript関数)は含まれない。
他、多数....
sample movies
http://www.youtube.com/watch?v=ARp0DK70JGM
http://www.youtube.com/watch?v=UOZQ4eEC4xA
Mbed_Functions.cpp
- Committer:
- ohneta
- Date:
- 2014-01-19
- Revision:
- 7:40010b4dc51d
- Parent:
- 6:30b4122b0ee2
- Child:
- 8:819934a27c2d
File content as of revision 7:40010b4dc51d:
/* * TinyJS for mbed. * Mbed_Functions.cpp * * Authored by Takehisa Oneta (ohneta@gmail.com) * 17th Jan. 2014 - */ #include "mbed.h" #include "TinyJS.h" #include "Mbed_Functions.h" //--------------------------------------------- void mbedDigitalIn(CScriptVar *c, void *) { string pinNameString = c->getParameter("pinName")->getString(); PinName pinName = _mbedPinNameExchange(pinNameString); string modeString = c->getParameter("mode")->getString(); int mode = PullDown; if (modeString == "PullUp") { mode = PullUp; } else if (modeString == "PullNone"){ mode = PullNone; } else if (modeString == "PullDown") { mode = PullDown; } DigitalIn din = DigitalIn((PinName)pinName); din.mode((PinMode)mode); int val = din.read(); c->getReturnVar()->setInt(val); } void mbedDigitalOut(CScriptVar *c, void *) { string pinNameString = c->getParameter("pinName")->getString(); PinName pinName = _mbedPinNameExchange(pinNameString); int val = c->getParameter("val")->getInt(); DigitalOut dout = DigitalOut((PinName)pinName); dout.write(val); } //--------------------------------------------- void mbedAnalogIn(CScriptVar *c, void *) { string pinNameString = c->getParameter("pinName")->getString(); PinName pinName = _mbedPinNameExchange(pinNameString); AnalogIn ain = AnalogIn((PinName)pinName); float val = ain.read(); c->getReturnVar()->setDouble(val); } void mbedAnalogOut(CScriptVar *c, void *) { string pinNameString = c->getParameter("pinName")->getString(); PinName pinName = _mbedPinNameExchange(pinNameString); float val = c->getParameter("val")->getDouble(); AnalogOut aout = AnalogOut((PinName)pinName); aout.write(val); } //--------------------------------------------- #define INTERRUPT_NUM 4 CTinyJS *_mbed_interruptIn_tinyJS; int _mbed_interruptIn_Count = 0; string _mbed_interruptIn_callbackStrings[INTERRUPT_NUM]; InterruptIn* _mbed_interrupt_array[INTERRUPT_NUM] = {NULL, NULL, NULL, NULL}; void _interruptVector0(){ _mbed_interruptIn_tinyJS->execute(_mbed_interruptIn_callbackStrings[0]); } void _interruptVector1(){ _mbed_interruptIn_tinyJS->execute(_mbed_interruptIn_callbackStrings[1]); } void _interruptVector2(){ _mbed_interruptIn_tinyJS->execute(_mbed_interruptIn_callbackStrings[2]); } void _interruptVector3(){ _mbed_interruptIn_tinyJS->execute(_mbed_interruptIn_callbackStrings[3]); } void mbedInterruptIn(CScriptVar *c, void *data) { string pinNameString = c->getParameter("pinName")->getString(); PinName pinName = _mbedPinNameExchange(pinNameString); string edgeString = c->getParameter("edge")->getString(); string modeString = c->getParameter("mode")->getString(); PinMode mode = PullDown; if (modeString == "PullUp") { mode = PullUp; } else if (modeString == "PullNone"){ mode = PullNone; } else if (modeString == "PullDown") { mode = PullDown; } _mbed_interruptIn_tinyJS = (CTinyJS *)data; _mbed_interruptIn_callbackStrings[_mbed_interruptIn_Count] = c->getParameter("callback")->getString(); if (_mbed_interrupt_array[_mbed_interruptIn_Count] != NULL) { delete _mbed_interrupt_array[_mbed_interruptIn_Count]; } _mbed_interrupt_array[_mbed_interruptIn_Count] = new InterruptIn(pinName); _mbed_interrupt_array[_mbed_interruptIn_Count]->mode(mode); if (_mbed_interruptIn_Count == 0) { if (edgeString == "fall") _mbed_interrupt_array[_mbed_interruptIn_Count]->fall(_interruptVector0); else if (edgeString == "rise") _mbed_interrupt_array[_mbed_interruptIn_Count]->rise(_interruptVector0); } else if (_mbed_interruptIn_Count == 1) { if (edgeString == "fall") _mbed_interrupt_array[_mbed_interruptIn_Count]->fall(_interruptVector1); else if (edgeString == "rise") _mbed_interrupt_array[_mbed_interruptIn_Count]->rise(_interruptVector1); } else if (_mbed_interruptIn_Count == 2) { if (edgeString == "fall") _mbed_interrupt_array[_mbed_interruptIn_Count]->fall(_interruptVector2); else if (edgeString == "rise") _mbed_interrupt_array[_mbed_interruptIn_Count]->rise(_interruptVector2); } else if (_mbed_interruptIn_Count == 3) { if (edgeString == "fall") _mbed_interrupt_array[_mbed_interruptIn_Count]->fall(_interruptVector3); else if (edgeString == "rise") _mbed_interrupt_array[_mbed_interruptIn_Count]->rise(_interruptVector3); } c->getReturnVar()->setInt(_mbed_interruptIn_Count); _mbed_interruptIn_Count++; if (_mbed_interruptIn_Count >= INTERRUPT_NUM) { _mbed_interruptIn_Count = 0; } } /* void mbedRemoveInterrupt(CScriptVar *c, void *) { int intrno = c->getParameter("interrupt_no")->getInt(); } */ //--------------------------------------------- void mbedWait(CScriptVar *c, void *) { float val = c->getParameter("s")->getDouble(); wait(val); } //--------------------------------------------- /** * */ void mbedMemfree(CScriptVar *c, void *) { int i = 0; while(1) { void *p = malloc(i); if (p == NULL) break; free(p); i++; } c->getReturnVar()->setInt(i); } //--------------------------------------------- PinName _mbedPinNameExchange(string pinNameString) { if (pinNameString == "p5") return p5; if (pinNameString == "p6") return p6; if (pinNameString == "p7") return p7; if (pinNameString == "p8") return p8; if (pinNameString == "p9") return p9; if (pinNameString == "p10") return p10; if (pinNameString == "p11") return p11; if (pinNameString == "p12") return p12; if (pinNameString == "p13") return p13; if (pinNameString == "p14") return p14; if (pinNameString == "p15") return p15; if (pinNameString == "p16") return p16; if (pinNameString == "p17") return p17; if (pinNameString == "p18") return p18; if (pinNameString == "p19") return p19; if (pinNameString == "p20") return p20; if (pinNameString == "p21") return p21; if (pinNameString == "p22") return p22; if (pinNameString == "p23") return p23; if (pinNameString == "p24") return p24; if (pinNameString == "p25") return p25; if (pinNameString == "p26") return p26; if (pinNameString == "p27") return p27; if (pinNameString == "p28") return p28; if (pinNameString == "p29") return p29; if (pinNameString == "p30") return p30; if (pinNameString == "LED1") return LED1; if (pinNameString == "LED2") return LED2; if (pinNameString == "LED3") return LED3; if (pinNameString == "LED4") return LED4; if (pinNameString == "USBTX") return USBTX; if (pinNameString == "USBRX") return USBRX; return NC; } //--------------------------------------------- Timer _mbedTimer; void mbedTimerStart(CScriptVar *c, void *) { _mbedTimer.start(); } void mbedTimerStop(CScriptVar *c, void *) { _mbedTimer.stop(); } void mbedTimerReset(CScriptVar *c, void *) { _mbedTimer.reset(); } void mbedTimerRead(CScriptVar *c, void *) { float tm = _mbedTimer.read(); c->getReturnVar()->setDouble(tm); } //--------------------------------------------- Timeout _mbedTimeout; CTinyJS *_mbedTimeout_tinyJS; string _mbedTimeout_callbackStrings; void _mbedTimeoutVector() { _mbedTimeout_tinyJS->execute(_mbedTimeout_callbackStrings); } void mbedTimeout(CScriptVar *c, void *data) { _mbedTimeout_tinyJS = (CTinyJS *)data; _mbedTimeout_callbackStrings = c->getParameter("callback")->getString(); float t = c->getParameter("t")->getDouble(); _mbedTimeout.attach(&_mbedTimeoutVector, t); } //--------------------------------------------- // ----------------------------------------------- Register Functions void registerMbedFunctions(CTinyJS *tinyJS) { tinyJS->addNative("function mbed.DigitalIn(pinName, mode)", mbedDigitalIn, 0); tinyJS->addNative("function mbed.DigitalOut(pinName, val)", mbedDigitalOut, 0); tinyJS->addNative("function mbed.AnalogIn(pinName)", mbedAnalogIn, 0); tinyJS->addNative("function mbed.AnalogOut(pinName, val)", mbedAnalogOut, 0); tinyJS->addNative("function mbed.interruptIn(pinName, edge, mode, callback)", mbedInterruptIn, tinyJS); //tinyJS->addNative("function mbed.RemoveInterrupt(pinName)", mbedRemoveInterrupt, tinyJS); tinyJS->addNative("function mbed.wait(s)", mbedWait, 0); tinyJS->addNative("function mbed.timerStart", mbedTimerStart, 0); tinyJS->addNative("function mbed.timerStop", mbedTimerStop, 0); tinyJS->addNative("function mbed.timerReset", mbedTimerReset, 0); tinyJS->addNative("function mbed.timerRead", mbedTimerRead, 0); tinyJS->addNative("function mbed.Timeout(callback, t)", mbedTimeout, tinyJS); tinyJS->addNative("function mbed.memfree()", mbedMemfree, 0); }