Fix serial output for MBL, M303

Marlin/Marlin.h

@@ -71,6 +71,7 @@
 #define SERIAL_PROTOCOLLNPGM(x) do{ serialprintPGM(PSTR(x "\n")); }while(0)
 
 #define SERIAL_PROTOCOLPAIR(name, value) SERIAL_ECHOPAIR(name, value)
+#define SERIAL_PROTOCOLLNPAIR(name, value) do{ SERIAL_ECHOPAIR(name, value); SERIAL_EOL; }while(0)
 
 extern const char errormagic[] PROGMEM;
 extern const char echomagic[] PROGMEM;

Marlin/Marlin_main.cpp

@@ -3280,10 +3280,9 @@ inline void gcode_G28() {
       case MeshReport:
         if (mbl.has_mesh()) {
           SERIAL_PROTOCOLPAIR("State: ", mbl.active() ? "On" : "Off");
-          SERIAL_PROTOCOLPAIR("\nNum X,Y: ", MESH_NUM_X_POINTS);
+          SERIAL_PROTOCOLLNPGM("\nNum X,Y: " STRINGIFY(MESH_NUM_X_POINTS) "," STRINGIFY(MESH_NUM_Y_POINTS));
-          SERIAL_PROTOCOLCHAR(','); SERIAL_PROTOCOL(MESH_NUM_Y_POINTS);
+          SERIAL_PROTOCOLLNPGM("Z search height: " STRINGIFY(MESH_HOME_SEARCH_Z));
-          SERIAL_PROTOCOLPAIR("\nZ search height: ", MESH_HOME_SEARCH_Z);
+          SERIAL_PROTOCOLPGM("Z offset: "); SERIAL_PROTOCOL_F(mbl.z_offset, 5);
-          SERIAL_PROTOCOLPGM("\nZ offset: "); SERIAL_PROTOCOL_F(mbl.z_offset, 5);
           SERIAL_PROTOCOLLNPGM("\nMeasured points:");
           for (py = 0; py < MESH_NUM_Y_POINTS; py++) {
             for (px = 0; px < MESH_NUM_X_POINTS; px++) {

Marlin/cardreader.cpp

@@ -395,8 +395,7 @@ void CardReader::openFile(char* name, bool read, bool push_current/*=false*/) {
     if (file.open(curDir, fname, O_READ)) {
       filesize = file.fileSize();
       SERIAL_PROTOCOLPAIR(MSG_SD_FILE_OPENED, fname);
-      SERIAL_PROTOCOLPAIR(MSG_SD_SIZE, filesize);
+      SERIAL_PROTOCOLLNPAIR(MSG_SD_SIZE, filesize);
-      SERIAL_EOL;
       sdpos = 0;
 
       SERIAL_PROTOCOLLNPGM(MSG_SD_FILE_SELECTED);
@@ -417,8 +416,7 @@ void CardReader::openFile(char* name, bool read, bool push_current/*=false*/) {
     }
     else {
       saving = true;
-      SERIAL_PROTOCOLPAIR(MSG_SD_WRITE_TO_FILE, name);
+      SERIAL_PROTOCOLLNPAIR(MSG_SD_WRITE_TO_FILE, name);
-      SERIAL_EOL;
       lcd_setstatus(fname);
     }
   }
@@ -449,6 +447,7 @@ void CardReader::removeFile(char* name) {
         if (!myDir.open(curDir, subdirname, O_READ)) {
           SERIAL_PROTOCOLPAIR("open failed, File: ", subdirname);
           SERIAL_PROTOCOLCHAR('.');
+          SERIAL_EOL;
           return;
         }
         else {

Marlin/temperature.cpp

@@ -322,17 +322,17 @@ unsigned char Temperature::soft_pwm[HOTENDS];
               SERIAL_PROTOCOLPAIR(MSG_T_MIN, min);
               SERIAL_PROTOCOLPAIR(MSG_T_MAX, max);
               if (cycles > 2) {
-                Ku = (4.0 * d) / (3.14159265 * (max - min) * 0.5);
+                Ku = (4.0 * d) / (M_PI * (max - min) * 0.5);
                 Tu = ((float)(t_low + t_high) * 0.001);
                 SERIAL_PROTOCOLPAIR(MSG_KU, Ku);
                 SERIAL_PROTOCOLPAIR(MSG_TU, Tu);
                 workKp = 0.6 * Ku;
                 workKi = 2 * workKp / Tu;
                 workKd = workKp * Tu * 0.125;
-                SERIAL_PROTOCOLLNPGM(MSG_CLASSIC_PID);
+                SERIAL_PROTOCOLLNPGM("\n" MSG_CLASSIC_PID);
                 SERIAL_PROTOCOLPAIR(MSG_KP, workKp);
                 SERIAL_PROTOCOLPAIR(MSG_KI, workKi);
-                SERIAL_PROTOCOLPAIR(MSG_KD, workKd);
+                SERIAL_PROTOCOLLNPAIR(MSG_KD, workKd);
                 /**
                 workKp = 0.33*Ku;
                 workKi = workKp/Tu;
@@ -390,40 +390,38 @@ unsigned char Temperature::soft_pwm[HOTENDS];
 
         #if HAS_PID_FOR_BOTH
           const char* estring = hotend < 0 ? "bed" : "";
-          SERIAL_PROTOCOLPAIR("#define  DEFAULT_", estring); SERIAL_PROTOCOLPAIR("Kp ", workKp);
+          SERIAL_PROTOCOLPAIR("#define  DEFAULT_", estring); SERIAL_PROTOCOLPAIR("Kp ", workKp); SERIAL_EOL;
-          SERIAL_PROTOCOLPAIR("#define  DEFAULT_", estring); SERIAL_PROTOCOLPAIR("Ki ", workKi);
+          SERIAL_PROTOCOLPAIR("#define  DEFAULT_", estring); SERIAL_PROTOCOLPAIR("Ki ", workKi); SERIAL_EOL;
-          SERIAL_PROTOCOLPAIR("#define  DEFAULT_", estring); SERIAL_PROTOCOLPAIR("Kd ", workKd);
+          SERIAL_PROTOCOLPAIR("#define  DEFAULT_", estring); SERIAL_PROTOCOLPAIR("Kd ", workKd); SERIAL_EOL;
         #elif ENABLED(PIDTEMP)
-          SERIAL_PROTOCOLPAIR("#define  DEFAULT_Kp ", workKp);
+          SERIAL_PROTOCOLPAIR("#define  DEFAULT_Kp ", workKp); SERIAL_EOL;
-          SERIAL_PROTOCOLPAIR("#define  DEFAULT_Ki ", workKi);
+          SERIAL_PROTOCOLPAIR("#define  DEFAULT_Ki ", workKi); SERIAL_EOL;
-          SERIAL_PROTOCOLPAIR("#define  DEFAULT_Kd ", workKd);
+          SERIAL_PROTOCOLPAIR("#define  DEFAULT_Kd ", workKd); SERIAL_EOL;
         #else
-          SERIAL_PROTOCOLPAIR("#define  DEFAULT_bedKp ", workKp);
+          SERIAL_PROTOCOLPAIR("#define  DEFAULT_bedKp ", workKp); SERIAL_EOL;
-          SERIAL_PROTOCOLPAIR("#define  DEFAULT_bedKi ", workKi);
+          SERIAL_PROTOCOLPAIR("#define  DEFAULT_bedKi ", workKi); SERIAL_EOL;
-          SERIAL_PROTOCOLPAIR("#define  DEFAULT_bedKd ", workKd);
+          SERIAL_PROTOCOLPAIR("#define  DEFAULT_bedKd ", workKd); SERIAL_EOL;
         #endif
 
-        #define _SET_BED_PID() \
+        #define _SET_BED_PID() do { \
           bedKp = workKp; \
           bedKi = scalePID_i(workKi); \
           bedKd = scalePID_d(workKd); \
-          updatePID()
+          updatePID(); } while(0)
 
-        #define _SET_EXTRUDER_PID() \
+        #define _SET_EXTRUDER_PID() do { \
           PID_PARAM(Kp, hotend) = workKp; \
           PID_PARAM(Ki, hotend) = scalePID_i(workKi); \
           PID_PARAM(Kd, hotend) = scalePID_d(workKd); \
-          updatePID()
+          updatePID(); } while(0)
 
         // Use the result? (As with "M303 U1")
         if (set_result) {
           #if HAS_PID_FOR_BOTH
-            if (hotend < 0) {
+            if (hotend < 0)
               _SET_BED_PID();
-            }
+            else
-            else {
               _SET_EXTRUDER_PID();
-            }
           #elif ENABLED(PIDTEMP)
             _SET_EXTRUDER_PID();
           #else