Fixes in exit code

libs/core/buttons.cpp

@@ -119,8 +119,9 @@ void *buttonPoll(void *arg) {
         auto state = readButtons();
         if (state == prevState)
             continue;
-        if (state & BUTTON_ID_ESCAPE)
-            exit(0);
+        if ((prevState & BUTTON_ID_ESCAPE) && !(state & BUTTON_ID_ESCAPE))
+            target_reset();
+        prevState = state;
         for (int i = 0; i < LastButtonID; ++i) {
             auto btn = &wb->buttons[i];
             btn->setPressed(!!(state & btn->id));
@@ -134,6 +135,13 @@ Button *getButton(int id) {
         target_panic(42);
     return &getWButtons()->buttons[id];
 }
+
+void target_init() {
+    InitEV3();
+    getWButtons(); // always on - handles ESCAPE key
+    DMESG("runtime started [%s]", HardwareVersionString());
+}
+
 }
 
 namespace control {
@@ -145,7 +153,6 @@ namespace control {
 String deviceFirmwareVersion() {
     return mkString(HardwareVersionString());
 }
-
 }
 
 // TODO rename this? move it somewhere?

libs/core/linux.cpp

@@ -262,17 +262,14 @@ void dumpDmesg() {
     // TODO
 }
 
-extern "C" void InitEV3();
-
 void initRuntime() {
     startTime = currTime();
     DMESG("runtime starting...");
     pthread_t disp;
     pthread_create(&disp, NULL, evtDispatcher, NULL);
     pthread_detach(disp);
-    InitEV3();
+    target_init();
     startUser();
-    DMESG("runtime started");
 }
 
 void dmesg(const char *format, ...) {

libs/core/pxt.h

@@ -12,6 +12,7 @@ void sleep_core_us(uint64_t us);
 class Button;
 typedef Button *Button_;
 
+extern "C" void target_init();
 }
 
 #endif

libs/core/test.ts

@@ -1,11 +1,10 @@
 screen.clear()
 screen.setFont(ScreenFont.Large)
-//screen.drawText(10, 30, "Hello PXT!")
-for (let i = 0; i < 10; ++i)
+screen.drawText(10, 30, "Hello PXT!")
 screen.drawRect(10, 70, 20, 10, Draw.Fill)
-//screen.drawEllipse(40, 40, 20, 10)
+screen.drawEllipse(40, 40, 20, 10)
 
-output.setLights(LightsPattern.GreenFlash)
+output.setLights(LightsPattern.GreenPulse)
 
 input.buttonDown.onEvent(ButtonEvent.Click, () => {
     screen.scroll(10)