diff --git a/workspace/TS100/Core/Drivers/FUSB302/policy_engine.h b/workspace/TS100/Core/Drivers/FUSB302/policy_engine.h
index 259b4df5..833d368f 100644
--- a/workspace/TS100/Core/Drivers/FUSB302/policy_engine.h
+++ b/workspace/TS100/Core/Drivers/FUSB302/policy_engine.h
@@ -32,6 +32,7 @@
 #define PDB_EVT_PE_HARD_SENT EVENT_MASK(4)
 #define PDB_EVT_PE_I_OVRTEMP EVENT_MASK(5)
 #define PDB_EVT_PE_PPS_REQUEST EVENT_MASK(6)
+#define PDB_EVT_PE_MSG_RX_PEND EVENT_MASK(7) /* Never SEND THIS DIRECTLY*/
 
 class PolicyEngine {
 public:
@@ -123,7 +124,7 @@ private:
 	static QueueHandle_t messagesWaiting;
 	static bool messageWaiting();
 //Read a pending message into the temp message
-	static void readMessage();
+	static bool readMessage();
 	static void start_pps_timer();
 	static void stop_pps_timer();
 
diff --git a/workspace/TS100/Core/Drivers/FUSB302/protocol_rx.h b/workspace/TS100/Core/Drivers/FUSB302/protocol_rx.h
index 274f506b..cdfce1f0 100644
--- a/workspace/TS100/Core/Drivers/FUSB302/protocol_rx.h
+++ b/workspace/TS100/Core/Drivers/FUSB302/protocol_rx.h
@@ -25,6 +25,7 @@
 /* Events for the Protocol RX thread */
 #define PDB_EVT_PRLRX_RESET EVENT_MASK(0)
 #define PDB_EVT_PRLRX_I_GCRCSENT EVENT_MASK(1)
+#define PDB_EVT_PRLRX_I_RXPEND EVENT_MASK(2)
 
 class ProtocolReceive {
 public:
diff --git a/workspace/TS100/Core/Drivers/FUSB302/protocol_tx.h b/workspace/TS100/Core/Drivers/FUSB302/protocol_tx.h
index 50bb278d..b593feae 100644
--- a/workspace/TS100/Core/Drivers/FUSB302/protocol_tx.h
+++ b/workspace/TS100/Core/Drivers/FUSB302/protocol_tx.h
@@ -49,6 +49,7 @@ private:
 	static const size_t TaskStackSize = 1024 / 4;
 	static uint32_t TaskBuffer[TaskStackSize];
 	static osStaticThreadDef_t TaskControlBlock;
+	static bool messageSending;
 	/*
 	 * Protocol TX machine states
 	 *