Timers (#235)

* adding timer support

* updates strings

libs/core/_locales/core-jsdoc-strings.json

@@ -52,6 +52,9 @@
   "console.logValue|param|value": "to write",
   "console.sendToScreen": "Sends the log messages to the brick screen and uses the brick up and down buttons to scroll.",
   "control": "Program controls and events.",
+  "control.Timer.millis": "Gets the elapsed time in millis",
+  "control.Timer.reset": "Resets the timer",
+  "control.Timer.seconds": "Gets the elapsed time in seconds",
   "control.allocateNotifyEvent": "Allocates the next user notification event",
   "control.deviceFirmwareVersion": "Determine the version of system software currently running.",
   "control.dmesg": "Write data to DMESG debugging buffer.",

libs/core/_locales/core-strings.json

@@ -47,7 +47,18 @@
   "console.log|block": "console|log %text",
   "console.sendToScreen|block": "send console to screen",
   "console|block": "console",
+  "control.Timer.millis|block": "%timer|millis",
+  "control.Timer.reset|block": "%timer|reset",
+  "control.Timer.seconds|block": "%timer|seconds",
   "control.raiseEvent|block": "raise event|from %src|with value %value",
+  "control.timer1|block": "timer 1",
+  "control.timer2|block": "timer 2",
+  "control.timer3|block": "timer 3",
+  "control.timer4|block": "timer 4",
+  "control.timer5|block": "timer 5",
+  "control.timer6|block": "timer 6",
+  "control.timer7|block": "timer 7",
+  "control.timer8|block": "timer 8",
   "control|block": "control",
   "motors.Motor.angle|block": "%motor|angle",
   "motors.Motor.clearCounts|block": "%motor|clear counts",

libs/core/console.ts

@@ -58,7 +58,7 @@ namespace console {
 
 namespace console.screen {
     const maxLines = 100;
-    const screenLines = 8;
+    const screenLines = 10;
     let lines: string[];
     let scrollPosition = 0;
 
@@ -66,8 +66,8 @@ namespace console.screen {
         if (!lines) {
             lines = [];
             console.addListener(log);
-            brick.buttonUp.onEvent(ButtonEvent.Click, () => scroll(-1))
+            brick.buttonUp.onEvent(ButtonEvent.Click, () => scroll(-3))
-            brick.buttonDown.onEvent(ButtonEvent.Click, () => scroll(1))                
+            brick.buttonDown.onEvent(ButtonEvent.Click, () => scroll(3))                
         }
     }
 

libs/core/pxt.json

@@ -11,6 +11,7 @@
         "mmap.cpp",
         "control.cpp",
         "console.ts",
+        "timer.ts",
         "serialnumber.cpp",
         "buttons.ts",
         "png.cpp",

libs/core/timer.ts

@@ -0,0 +1,51 @@
+namespace control {
+    //% fixedInstances
+    export class Timer {
+        start: number;
+
+        constructor() {
+            this.start = control.millis();
+        }
+
+        /**
+         * Gets the elapsed time in millis
+         */
+        //% blockId=timerMillis block="%timer|millis"
+        millis(): number {
+            return control.millis() - this.start;
+        }
+        
+        /**
+         * Gets the elapsed time in seconds
+         */
+        //% blockId=timerSeconds block="%timer|seconds"
+        seconds(): number {
+            return this.millis() / 1000;
+        }
+
+        /**
+         * Resets the timer
+         */
+        //% blockId=timerRest block="%timer|reset"
+        reset() {
+            this.start = control.millis();
+        }
+    }
+
+    //% whenUsed fixedInstance block="timer 1"
+    export const timer1 = new Timer();
+    //% whenUsed fixedInstance block="timer 2"
+    export const timer2 = new Timer();
+    //% whenUsed fixedInstance block="timer 3"
+    export const timer3 = new Timer();
+    //% whenUsed fixedInstance block="timer 4"
+    export const timer4 = new Timer();
+    //% whenUsed fixedInstance block="timer 5"
+    export const timer5 = new Timer();
+    //% whenUsed fixedInstance block="timer 6"
+    export const timer6 = new Timer();
+    //% whenUsed fixedInstance block="timer 7"
+    export const timer7 = new Timer();
+    //% whenUsed fixedInstance block="timer 8"
+    export const timer8 = new Timer();
+}