match to our ad hoc i2c "protocol"

Author: thinkyhead

Marlin/src/gcode/feature/rs485/M485.cpp

@@ -83,6 +83,7 @@ void GcodeSuite::M485() {
   // Read and ignore any packets that may have come in, before we write.
 
   while (rs485Packetizer.hasPacket()) {
+    SERIAL_ECHO_START();
     SERIAL_ECHOPGM("rs485-unexpected-packet: ");
     write_packet_data();
     rs485Packetizer.clearPacket();
@@ -99,9 +100,9 @@ void GcodeSuite::M485() {
   //millis_t endTime = millis();
   //SERIAL_ECHOLNPGM("rs485-time: ", endTime - startTime);
 
-  if (!hasPacket) { SERIAL_ECHOLNPGM("rs485-reply: TIMEOUT"); return; }
+  if (!hasPacket) { SERIAL_ECHO_MSG("rs485-timeout"); return; }
 
-  SERIAL_ECHOPGM("rs485-reply: ");
+  SERIAL_ECHO_START(); SERIAL_ECHOPGM("rs485-reply: ");
   write_packet_data();
   rs485Packetizer.clearPacket();
 }