added radio transmit power

libs/microbit-radio/radio.ts

@@ -82,4 +82,16 @@ namespace radio {
     //% blockId=radio_set_group block="set group %ID"
     export function setGroup(id: number) : void {
     }
+    
+    /**
+     * Change the output power level of the transmitter to the given value.
+    * @param power a value in the range 0..7, where 0 is the lowest power and 7 is the highest, eg: 7
+    */
+    //% help=/functions/set-transmit-power
+    //% shim=micro_bit::setTransmitPower
+    //% weight=9
+    //% blockId=radio_set_transmit_power block="set transmit power %power"
+    export function setTransmitPower(power:number) {
+        
+    }
 }

sim/libmbit.ts

@@ -445,6 +445,9 @@ namespace ks.rt.micro_bit {
         board().radio.setGroup(id);
     }
     
+    export function setTransmitPower(power: number) : void {
+        board().radio.setTransmitPower(power);           
+    }
 
     export function datagramSendNumbers(value0 : number, value1: number, value2: number, value3: number) : void {
         board().radio.datagram.send([value0, value1, value2, value3]);

sim/state.ts

@@ -98,6 +98,7 @@ namespace ks.rt.micro_bit {
     export class RadioBus {
         // uint8_t radioDefaultGroup = MICROBIT_RADIO_DEFAULT_GROUP;
         groupId = 0; // todo
+        power = 0;
         datagram: RadioDatagram;
 
         constructor(private runtime: Runtime) {
@@ -107,13 +108,19 @@ namespace ks.rt.micro_bit {
         setGroup(id: number) {
             this.groupId = id & 0xff; // byte only
         }
+        
+        setTransmitPower(power: number) {
+            this.power = Math.max(0, Math.min(7, power));
+        }
 
         broadcast(msg: number) {
             let ens = enums();
             Runtime.postMessage(<SimulatorEventBusMessage>{
                 type: 'eventbus',
                 id: ens.MES_BROADCAST_GENERAL_ID,
-                eventid: msg
+                eventid: msg,
+                power: this.power,
+                group: this.groupId
             })
         }
     }