Brad Powell
The xplane_io (X-Plane I/O) program is used to establish network communications, via UDP, with the X-Plane flight simulator running on a computer. The code consists of class libraries that abstract the lower-level UDP packet encoding and decoding details, according to the UDP protocol specifications in X-Plane version 9. Any X-Plane DATA packets can be sent and received, and any X-Plane DataRefs can be set by sending DREF packets to X-Plane.
Dependencies: EthernetNetIf mbed ConfigFile
Diff: XPlaneUdp/XPlaneUdpDREF.cpp
- Revision:
- 0:a5d13af495af
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/XPlaneUdp/XPlaneUdpDREF.cpp Wed Dec 21 22:29:59 2011 +0000
@@ -0,0 +1,75 @@
+#include "XPlaneUdpDREF.h"
+
+
+XPlaneUdpDREF::XPlaneUdpDREF(char * drefName, bool reverseByteOrder) {
+
+ _drefName = drefName;
+ _reverseByteOrder = reverseByteOrder;
+
+ _dataChanged = false;
+ _drefFloat = DREF_VALUE_NA;
+ _drefInt = DREF_VALUE_NA;
+}
+
+
+char * XPlaneUdpDREF::drefName() const {
+ return _drefName;
+}
+
+float XPlaneUdpDREF::drefFloat() const {
+ return _drefFloat;
+}
+
+int XPlaneUdpDREF::drefInt() const {
+ return _drefInt;
+}
+
+void XPlaneUdpDREF::drefFloat(float floatVal) {
+ _drefFloat = floatVal;
+ _drefInt = DREF_VALUE_NA;
+ setDataChanged();
+}
+
+void XPlaneUdpDREF::drefInt(int intVal) {
+ _drefInt = intVal;
+ _drefFloat = DREF_VALUE_NA;
+ setDataChanged();
+}
+
+ /**
+ * Starting at the given pointer location, populate bytes from the dataRef value and name.
+ * Byte order will be reversed, according to the reverseBytes property.
+ */
+
+void XPlaneUdpDREF::populateDREFMessage(char * bytes) {
+
+ if (_drefInt != DREF_VALUE_NA) {
+ memcpy(bytes, &_drefInt, 4);
+ }
+ else {
+ memcpy(bytes, &_drefFloat, 4);
+ }
+
+ if (_reverseByteOrder) {
+ reverse4Bytes((char*) bytes);
+ }
+
+ strcpy(bytes + 4, _drefName);
+}
+
+bool XPlaneUdpDREF::isDataChanged() const {
+ return _dataChanged;
+}
+
+void XPlaneUdpDREF::setDataChanged() {
+ _dataChanged = true;
+}
+
+void XPlaneUdpDREF::resetDataChanged() {
+ _dataChanged = false;
+}
+
+void XPlaneUdpDREF::toString(FILE * outputStream) {
+ fprintf(outputStream, "DataRef: name=%s, intVal=%d, floatVal=%f, revBytes=%d",
+ _drefName, _drefInt, _drefFloat, _reverseByteOrder);
+}