add Grove - Thumb Joystick

main.ts

@@ -61,13 +61,40 @@ enum GroveGesture {
     Wave = 9
 }
 
+enum GroveJoystickKey {
+    //% block=None
+    None = 0,
+    //% block=Right
+    Right = 1,
+    //% block=Left
+    Left = 2,
+    //% block=Up
+    Up = 3,
+    //% block=Down
+    Down = 4,
+    //% block=Upper left
+    UL = 5,
+    //% block=Upper right
+    UR = 6,
+    //% block=Lower left
+    LL = 7,
+    //% block=Lower right
+    LR = 8,
+    //% block=press
+    Press = 9
+}
+
+
 /**
  * Functions to operate Grove module.
  */
 //% weight=10 color=#9F79EE icon="\uf108" block="Grove"
 namespace grove {
     const gestureEventId = 3100;
+    const joystickEventID = 3101;
     let lastGesture = GroveGesture.None;
+    let lastJoystick = GroveJoystickKey.None;
+    let joystick: GroveJoystick = undefined;
     let paj7620: PAJ7620 = undefined;
     let distanceBackup: number = 0;
     /**
@@ -92,6 +119,31 @@ namespace grove {
             })
         }
     }
+
+
+    /**
+     * Do something when a key is detected by Grove - Thumb Joystick
+     * @param key type of joystick to detect
+     * @param xpin
+     * @param ypin
+     * @param handler code to run
+     */
+    //% blockId=grove_joystick_create_event block="on Key|%key"
+    export function onJoystick(key: GroveJoystickKey, xpin: AnalogPin, ypin: AnalogPin, handler: () => void) {
+        control.onEvent(joystickEventID, key, handler);
+        control.inBackground(() => {
+            while(true) {
+                const key = joystick.read(xpin, ypin);
+                if (key != lastJoystick) {
+                    lastJoystick = key; 
+                    control.raiseEvent(joystickEventID, lastJoystick);
+                }
+                basic.pause(50);
+            }
+        })
+        
+    }
+
     
     /**
      * Create a new driver of Grove - Ultrasonic Sensor to measure distances in cm
@@ -464,4 +516,50 @@ namespace grove {
             this.bit(0x7f, 0x03);
         }
     }
+
+
+    export class GroveJoystick
+    {
+        /**
+         * Detect position from Grove - Thumb Joystick
+         * @param xPin
+         * @param yPin
+         */
+        //% blockId=grove_joystick_read block="%strip|read position of joystick"
+        //% advanced=true
+        read(xPin: AnalogPin, yPin: AnalogPin): number {
+            let xdata = 0, ydata = 0, result = 0;
+            if (xPin && yPin) {
+                xdata = pins.analogReadPin(xPin);
+                ydata = pins.analogReadPin(yPin);
+                if (xdata > 1000) {
+                    result = GroveJoystickKey.Press;
+                }
+                else if (xdata > 600) {
+                    if (ydata > 600) result = GroveJoystickKey.UR;
+                    else if (ydata < 400) result = GroveJoystickKey.LR;
+                    else result = GroveJoystickKey.Right;
+                }
+                else if (xdata < 400) {
+                    if (ydata > 600) result = GroveJoystickKey.UL;
+                    else if (ydata < 400) result = GroveJoystickKey.LL;
+                    else result = GroveJoystickKey.Left;
+                }
+                else {
+                    if (ydata > 600) result = GroveJoystickKey.Up;
+                    else if (ydata < 400) result = GroveJoystickKey.Down;
+                    else result = GroveJoystickKey.None;
+                }
+            }
+            else {
+                result =  GroveJoystickKey.None;
+            }
+            return result;
+        }
+    }
+
+
+    // export class GroveHicell {
+
+    // }
 }