This could be solved by code like this
defining two macros
#define dbg(myFixedText, variableName) \
Serial.print( F(#myFixedText " " #variableName"=") ); \
Serial.println(variableName);
// usage: dbg("1:my fixed text",myVariable);
// myVariable can be any variable or expression that is defined in scope
#define dbgi(myFixedText, variableName,timeInterval) \
do { \
static unsigned long intervalStartTime; \
if ( millis() - intervalStartTime >= timeInterval ){ \
intervalStartTime = millis(); \
Serial.print( F(#myFixedText " " #variableName"=") ); \
Serial.println(variableName); \
} \
} while (false);
// usage: dbgi("2:my fixed text",myVar,myInterval);
// myVar can be any variable or expression that is defined in scope
// myInterval is the time-interval which must pass by before the next
// print is executed
and then use the macro very similar to any other function-call
instead of
Serial.print("DXL: ");
Serial.println(data.DXPos);
code
dbgi("DXL:",data.DXPos,1000);
which does print the value DXPos only once every second (1000 milliseconds)
best regards Stefan