add serial_rx msp

src/rxmsp.c

@@ -0,0 +1,31 @@
+#include "board.h"
+#include "mw.h"
+
+static bool rxMspFrameDone = false;
+
+static uint16_t mspReadRawRC(uint8_t chan);
+static uint16_t mspReadRawRC(uint8_t chan)
+{
+    return rcData[chan];
+}
+
+void mspFrameRecieve(void)
+{
+    rxMspFrameDone = true;
+}
+
+bool mspFrameComplete(void)
+{
+    if (rxMspFrameDone) {
+        failsafeCnt = 0; // clear FailSafe counter
+        rxMspFrameDone = false;
+        return true;
+    }
+    return false;
+}
+
+void mspInit(rcReadRawDataPtr *callback)
+{
+    if (callback)
+        *callback = mspReadRawRC;
+}