Tank fixes (#892)

* fixing turnration computation

* updated tank computation

* fix rendering glitch

* restore tank computation

* rounding errors

docs/reference/motors/synced/steer.md

@@ -86,6 +86,51 @@ for (let i = 0; i < 4; i++) {
 motors.stopAll()
 ```
 
+### Steer tester
+
+This program lets you change the values of speed and turn ratio with the buttons.
+
+```typescript
+let speed = 0;
+let turnRatio = 0;
+
+brick.showString(`steer tester`, 1)
+brick.showString(`connect motors BC`, 7)
+brick.showString(`up/down for speed`, 8)
+brick.showString(`left/right for turn ratio`, 9)
+
+forever(function () {
+    brick.showString(`motor B speed ${motors.largeB.speed()}%`, 4)
+    brick.showString(`motor C speed ${motors.largeC.speed()}%`, 5)
+    pause(100)
+})
+
+function updateSteer() {
+    motors.largeBC.steer(turnRatio, speed);
+    brick.showString(`speed ${speed}%`, 2)
+    brick.showString(`turnRatio ${turnRatio}`, 3)
+}
+
+brick.buttonUp.onEvent(ButtonEvent.Pressed, function () {
+    speed += 10
+    updateSteer()
+})
+brick.buttonDown.onEvent(ButtonEvent.Pressed, function () {
+    speed -= 10
+    updateSteer()
+})
+brick.buttonLeft.onEvent(ButtonEvent.Pressed, function () {
+    turnRatio -= 10
+    updateSteer()
+})
+brick.buttonRight.onEvent(ButtonEvent.Pressed, function () {
+    turnRatio += 10
+    updateSteer()
+})
+
+updateSteer()
+```
+
 ## See also
 
 [tank](/reference/motors/synced/tank), [run](/reference/motors/motor/run)

docs/reference/motors/synced/tank.md

@@ -82,6 +82,51 @@ pause(5000)
 motors.stopAll()
 ```
 
+### Tank tester
+
+This program lets you change the tank values using the brick buttons
+
+```typescript
+let tankB = 0;
+let tankC = 0;
+
+brick.showString(`tank tester`, 1)
+brick.showString(`connect motors BC`, 7)
+brick.showString(`up/down for tank B`, 8)
+brick.showString(`left/right for tank C`, 9)
+
+forever(function () {
+    brick.showString(`motor B speed ${motors.largeB.speed()}%`, 4)
+    brick.showString(`motor C speed ${motors.largeC.speed()}%`, 5)
+    pause(100)
+})
+
+function updateTank() {
+    brick.showString(`tank A: ${tankB}%`, 2)
+    brick.showString(`tank B: ${tankC}%`, 3)
+    motors.largeBC.tank(tankB, tankC);
+}
+
+brick.buttonUp.onEvent(ButtonEvent.Pressed, function () {
+    tankB += 10
+    updateTank();
+})
+brick.buttonDown.onEvent(ButtonEvent.Pressed, function () {
+    tankB -= 10
+    updateTank();
+})
+brick.buttonRight.onEvent(ButtonEvent.Pressed, function () {
+    tankC += 10
+    updateTank();
+})
+brick.buttonLeft.onEvent(ButtonEvent.Pressed, function () {
+    tankC -= 10
+    updateTank();
+})
+
+updateTank();
+```
+
 ## See also
 
 [steer](/reference/motors/synced/steer), [run](/reference/motors/motor/run)

libs/core/input.ts

@@ -129,7 +129,7 @@ namespace sensors.internal {
 
     let nonActivated = 0;
     function detectDevices() {
-        control.dmesg(`detect devices (${nonActivated} na)`)
+        //control.dmesg(`detect devices (${nonActivated} na)`)
         const conns = analogMM.slice(AnalogOff.InConn, DAL.NUM_INPUTS)
         let numChanged = 0;
         const uartSensors: SensorInfo[] = [];
@@ -198,7 +198,7 @@ namespace sensors.internal {
                 }
             }
         }
-        control.dmesg(`detect devices done`)
+        //control.dmesg(`detect devices done`)
     }
 
     export class Sensor extends control.Component {

libs/core/output.ts

@@ -561,10 +561,12 @@ namespace motors {
             speedRight = Math.clamp(-100, 100, speedRight >> 0);
 
             const speed = Math.abs(speedLeft) > Math.abs(speedRight) ? speedLeft : speedRight;
-            const turnRatio = speedLeft == speed
+            let turnRatio = speedLeft == speed
-                ? (100 - speedRight / speedLeft * 100)
+                ? speedLeft == 0 ? 0 : (100 - speedRight / speedLeft * 100)
-                : (speedLeft / speedRight * 100 - 100);
+                : speedRight == 0 ? 0 : (speedLeft / speedRight * 100 - 100);
+            turnRatio = Math.floor(turnRatio);
 
+            //control.dmesg(`tank ${speedLeft} ${speedRight} => ${turnRatio} ${speed}`)
             this.steer(turnRatio, speed, value, unit);
         }
 

sim/state/motornode.ts

@@ -63,6 +63,7 @@ namespace pxsim {
             delete this.speedCmd;
             delete this.speedCmdValues;
             delete this._synchedMotor;
+            this.setChangedState();
         }        
 
         clearSyncCmd() {
@@ -184,11 +185,13 @@ namespace pxsim {
                     case DAL.opOutputStepSync:
                     case DAL.opOutputTimeSync: {
                         const otherMotor = this._synchedMotor;
-                        if (otherMotor.port < this.port) // handled in other motor code
-                            break;
-
                         const speed = this.speedCmdValues[0];
                         const turnRatio = this.speedCmdValues[1];
+                        // if turnratio is negative, right motor at power level
+                        // right motor -> this.port > otherMotor.port
+                        if (Math.sign(this.port - otherMotor.port)
+                            == Math.sign(turnRatio))
+                            break; // handled in other motor code
                         const stepsOrTime = this.speedCmdValues[2];
                         const brake = this.speedCmdValues[3];
                         const dstep = this.speedCmd == DAL.opOutputTimeSync
@@ -204,12 +207,7 @@ namespace pxsim {
 
                         // turn ratio is a bit weird to interpret
                         // see https://communities.theiet.org/blogs/698/1706
-                        if (turnRatio < 0) {
+                        otherMotor.speed = this.speed * (100 - Math.abs(turnRatio)) / 100;
-                            otherMotor.speed = speed;
-                            this.speed *= (100 + turnRatio) / 100;
-                        } else {
-                            otherMotor.speed = this.speed * (100 - turnRatio) / 100;
-                        }
 
                         // clamp
                         this.speed = Math.max(-100, Math.min(100, this.speed >> 0));