add EXRAIL for booster

BoosterAutomation.h

@@ -0,0 +1,58 @@
+
+#if defined(ARDUINO_ARCH_ESP32)
+ALIAS(BOOSTER_START)
+ALIAS(BOOSTER_CSMODE)
+ALIAS(BOOSTER_BOOSTERMODE)
+// Booster/CS switch automations
+// uses sequences BOOSTER_START, BOOSTER_CSMODE, BOOSTER_BOOSTERMODE, BOOSTER_CHANGELOGIC
+// uses latches 200
+AUTOSTART  // remove this if you want manual start
+ROUTE(BOOSTER_START, "BOOSTER/CS auto START")
+  PRINT("BOOTER/CS auto mode starting for both tracks")
+  CALL(BOOSTER_BOOSTERMODE) // try booster mode
+FOLLOW(BOOSTER_CHANGELOGIC) // goto automatic mode
+
+ROUTE(BOOSTER_CSMODE, "RUN AS CS")
+  SET_TRACK(A, MAIN)
+  SET_POWER(A, ON)
+  SET_TRACK(B, MAIN)
+  SET_POWER(B, ON)
+  PRINT("CS START")
+  LATCH(200)
+RETURN
+
+ROUTE(BOOSTER_BOOSTERMODE, "RUN AS BOOSTER")
+  SET_TRACK(A, BOOST)
+  SET_POWER(A, ON)
+  SET_TRACK(B, BOOST)
+  SET_POWER(B, ON)
+  PRINT("BOOSTER START")
+  UNLATCH(200)
+RETURN
+
+#define BOOSTER_TIMEOUT 500
+SEQUENCE(BOOSTER_CHANGELOGIC)
+  // Monitor pin change and get a timeout if not
+  IF(BOOSTER_INPUT)
+    ATTIMEOUT(-BOOSTER_INPUT,BOOSTER_TIMEOUT)
+  ELSE
+    ATTIMEOUT(BOOSTER_INPUT,BOOSTER_TIMEOUT)
+  ENDIF
+  IFTIMEOUT
+    IF(200)
+      // already switched to CS mode
+    ELSE
+      CALL(BOOSTER_CSMODE)
+    ENDIF
+    // hang here and wait for pin change
+    IF(BOOSTER_INPUT)
+      AT(-BOOSTER_INPUT)
+    ELSE
+      AT(BOOSTER_INPUT)
+    ENDIF
+    // pin change has happened, go to booster mode
+    CALL(BOOSTER_BOOSTERMODE)
+  ENDIF
+FOLLOW(BOOSTER_CHANGELOGIC)
+#undef BOOSTER_TIMEOUT
+#endif