♻️ Simplify SERIAL_ECHO (MarlinFirmware#25928)

Since this increases AVR code size, try to optimize further.

Marlin/src/HAL/LPC1768/eeprom_sdcard.cpp

@@ -91,15 +91,9 @@ bool PersistentStore::access_finish() {
 static void debug_rw(const bool write, int &pos, const uint8_t *value, const size_t size, const FRESULT s, const size_t total=0) {
   #if ENABLED(DEBUG_SD_EEPROM_EMULATION)
     FSTR_P const rw_str = write ? F("write") : F("read");
-    SERIAL_CHAR(' ');
-    SERIAL_ECHOF(rw_str);
-    SERIAL_ECHOLNPGM("_data(", pos, ",", *value, ",", size, ", ...)");
-    if (total) {
-      SERIAL_ECHOPGM(" f_");
-      SERIAL_ECHOF(rw_str);
-      SERIAL_ECHOPGM("()=", s, "\n size=", size, "\n bytes_");
-      SERIAL_ECHOLNF(write ? F("written=") : F("read="), total);
-    }
+    SERIAL_ECHOLN(AS_CHAR(' '), rw_str, F("_data("), pos, AS_CHAR(','), *value, AS_CHAR(','), size, F(", ...)"));
+    if (total)
+      SERIAL_ECHOLN(F(" f_"), rw_str, F("()="), s, F("\n size="), size, F("\n bytes_"), write ? F("written=") : F("read="), total);
     else
       SERIAL_ECHOLNPGM(" f_lseek()=", s);
   #endif

Marlin/src/HAL/shared/Delay.cpp

@@ -109,13 +109,7 @@
   #if ENABLED(MARLIN_DEV_MODE)
     void dump_delay_accuracy_check() {
       auto report_call_time = [](FSTR_P const name, FSTR_P const unit, const uint32_t cycles, const uint32_t total, const bool do_flush=true) {
-        SERIAL_ECHOPGM("Calling ");
-        SERIAL_ECHOF(name);
-        SERIAL_ECHOLNPGM(" for ", cycles);
-        SERIAL_ECHOF(unit);
-        SERIAL_ECHOLNPGM(" took: ", total);
-        SERIAL_CHAR(' ');
-        SERIAL_ECHOF(unit);
+        SERIAL_ECHOLN(F("Calling "), name, F(" for "), cycles, AS_CHAR(' '), unit, F(" took: "), total, AS_CHAR(' '), unit);
         if (do_flush) SERIAL_FLUSHTX();
       };
 

Marlin/src/MarlinCore.cpp

@@ -882,7 +882,7 @@ void kill(FSTR_P const lcd_error/*=nullptr*/, FSTR_P const lcd_component/*=nullp
   TERN_(HAS_CUTTER, cutter.kill()); // Full cutter shutdown including ISR control
 
   // Echo the LCD message to serial for extra context
-  if (lcd_error) { SERIAL_ECHO_START(); SERIAL_ECHOLNF(lcd_error); }
+  if (lcd_error) { SERIAL_ECHO_START(); SERIAL_ECHOLN(lcd_error); }
 
   #if HAS_DISPLAY
     ui.kill_screen(lcd_error ?: GET_TEXT_F(MSG_KILLED), lcd_component ?: FPSTR(NUL_STR));

Marlin/src/core/debug_out.h

@@ -31,19 +31,11 @@
 #undef DEBUG_ERROR_START
 #undef DEBUG_CHAR
 #undef DEBUG_ECHO
-#undef DEBUG_DECIMAL
-#undef DEBUG_ECHO_F
 #undef DEBUG_ECHOLN
 #undef DEBUG_ECHOPGM
 #undef DEBUG_ECHOLNPGM
-#undef DEBUG_ECHOF
-#undef DEBUG_ECHOLNF
 #undef DEBUG_ECHOPGM_P
 #undef DEBUG_ECHOLNPGM_P
-#undef DEBUG_ECHOPAIR_F
-#undef DEBUG_ECHOPAIR_F_P
-#undef DEBUG_ECHOLNPAIR_F
-#undef DEBUG_ECHOLNPAIR_F_P
 #undef DEBUG_ECHO_MSG
 #undef DEBUG_ERROR_MSG
 #undef DEBUG_EOL
@@ -62,21 +54,13 @@
   #define DEBUG_ERROR_START       SERIAL_ERROR_START
   #define DEBUG_CHAR              SERIAL_CHAR
   #define DEBUG_ECHO              SERIAL_ECHO
-  #define DEBUG_DECIMAL           SERIAL_DECIMAL
-  #define DEBUG_ECHO_F            SERIAL_ECHO_F
   #define DEBUG_ECHOLN            SERIAL_ECHOLN
   #define DEBUG_ECHOPGM           SERIAL_ECHOPGM
   #define DEBUG_ECHOLNPGM         SERIAL_ECHOLNPGM
-  #define DEBUG_ECHOF             SERIAL_ECHOF
-  #define DEBUG_ECHOLNF           SERIAL_ECHOLNF
   #define DEBUG_ECHOPGM           SERIAL_ECHOPGM
   #define DEBUG_ECHOPGM_P         SERIAL_ECHOPGM_P
-  #define DEBUG_ECHOPAIR_F        SERIAL_ECHOPAIR_F
-  #define DEBUG_ECHOPAIR_F_P      SERIAL_ECHOPAIR_F_P
   #define DEBUG_ECHOLNPGM         SERIAL_ECHOLNPGM
   #define DEBUG_ECHOLNPGM_P       SERIAL_ECHOLNPGM_P
-  #define DEBUG_ECHOLNPAIR_F      SERIAL_ECHOLNPAIR_F
-  #define DEBUG_ECHOLNPAIR_F_P    SERIAL_ECHOLNPAIR_F_P
   #define DEBUG_ECHO_MSG          SERIAL_ECHO_MSG
   #define DEBUG_ERROR_MSG         SERIAL_ERROR_MSG
   #define DEBUG_EOL               SERIAL_EOL
@@ -93,19 +77,11 @@
   #define DEBUG_ERROR_START()       NOOP
   #define DEBUG_CHAR(...)           NOOP
   #define DEBUG_ECHO(...)           NOOP
-  #define DEBUG_DECIMAL(...)        NOOP
-  #define DEBUG_ECHO_F(...)         NOOP
   #define DEBUG_ECHOLN(...)         NOOP
   #define DEBUG_ECHOPGM(...)        NOOP
   #define DEBUG_ECHOLNPGM(...)      NOOP
-  #define DEBUG_ECHOF(...)          NOOP
-  #define DEBUG_ECHOLNF(...)        NOOP
   #define DEBUG_ECHOPGM_P(...)      NOOP
   #define DEBUG_ECHOLNPGM_P(...)    NOOP
-  #define DEBUG_ECHOPAIR_F(...)     NOOP
-  #define DEBUG_ECHOPAIR_F_P(...)   NOOP
-  #define DEBUG_ECHOLNPAIR_F(...)   NOOP
-  #define DEBUG_ECHOLNPAIR_F_P(...) NOOP
   #define DEBUG_ECHO_MSG(...)       NOOP
   #define DEBUG_ERROR_MSG(...)      NOOP
   #define DEBUG_EOL()               NOOP

Marlin/src/core/debug_section.h

@@ -38,11 +38,8 @@ class SectionLog {
   bool debug;
 
   void echo_msg(FSTR_P const fpre) {
-    SERIAL_ECHOF(fpre);
-    if (the_msg) {
-      SERIAL_CHAR(' ');
-      SERIAL_ECHOF(the_msg);
-    }
+    SERIAL_ECHO(fpre);
+    if (the_msg) SERIAL_ECHO(AS_CHAR(' '), the_msg);
     SERIAL_CHAR(' ');
     print_pos(current_position);
   }

Marlin/src/core/serial.cpp

@@ -68,26 +68,51 @@ MAP(_N_LBL, LOGICAL_AXIS_NAMES); MAP(_SP_N_LBL, LOGICAL_AXIS_NAMES);
 
 #endif
 
-void serial_print_P(PGM_P str) {
-  while (const char c = pgm_read_byte(str++)) SERIAL_CHAR(c);
+// Specializations for float, p_float_t, w_float_t
+template <> void SERIAL_ECHO(const float f)      { SERIAL_IMPL.print(f); }
+template <> void SERIAL_ECHO(const p_float_t pf) { SERIAL_IMPL.print(pf.value, pf.prec); }
+template <> void SERIAL_ECHO(const w_float_t wf) { char f1[20]; SERIAL_IMPL.print(dtostrf(wf.value, wf.width, wf.prec, f1)); }
+
+// Specializations for F-string
+template <> void SERIAL_ECHO(const FSTR_P fstr)   { SERIAL_ECHO_P(FTOP(fstr)); }
+template <> void SERIAL_ECHOLN(const FSTR_P fstr) { SERIAL_ECHOLN_P(FTOP(fstr)); }
+
+void SERIAL_CHAR(char a) { SERIAL_IMPL.write(a); }
+void SERIAL_EOL() { SERIAL_CHAR('\n'); }
+
+void SERIAL_ECHO(serial_char_t x) { SERIAL_IMPL.write(x.c); }
+
+void SERIAL_FLUSH()    { SERIAL_IMPL.flush(); }
+void SERIAL_FLUSHTX()  { SERIAL_IMPL.flushTX(); }
+
+void SERIAL_ECHO_P(PGM_P pstr) {
+  while (const char c = pgm_read_byte(pstr++)) SERIAL_CHAR(c);
 }
+void SERIAL_ECHOLN_P(PGM_P pstr) { SERIAL_ECHO_P(pstr); SERIAL_EOL(); }
 
-void serial_echo_start()  { serial_print(F("echo:")); }
-void serial_error_start() { serial_print(F("Error:")); }
+void SERIAL_ECHO_START()  { SERIAL_ECHO(F("echo:")); }
+void SERIAL_ERROR_START() { SERIAL_ECHO(F("Error:")); }
 
-void serial_spaces(uint8_t count) { count *= (PROPORTIONAL_FONT_RATIO); while (count--) SERIAL_CHAR(' '); }
+void SERIAL_ECHO_SP(uint8_t count) { count *= (PROPORTIONAL_FONT_RATIO); while (count--) SERIAL_CHAR(' '); }
 
 void serial_offset(const_float_t v, const uint8_t sp/*=0*/) {
   if (v == 0 && sp == 1)
     SERIAL_CHAR(' ');
   else if (v > 0 || (v == 0 && sp == 2))
     SERIAL_CHAR('+');
-  SERIAL_DECIMAL(v);
+  SERIAL_ECHO(v);
+}
+
+void serial_ternary(FSTR_P const pre, const bool onoff, FSTR_P const on, FSTR_P const off, FSTR_P const post/*=nullptr*/) {
+  if (pre)           SERIAL_ECHO(pre);
+  if (onoff && on)   SERIAL_ECHO(on);
+  if (!onoff && off) SERIAL_ECHO(off);
+  if (post)          SERIAL_ECHO(post);
 }
 
-void serialprint_onoff(const bool onoff) { serial_print(onoff ? F(STR_ON) : F(STR_OFF)); }
+void serialprint_onoff(const bool onoff) { SERIAL_ECHO(onoff ? F(STR_ON) : F(STR_OFF)); }
 void serialprintln_onoff(const bool onoff) { serialprint_onoff(onoff); SERIAL_EOL(); }
-void serialprint_truefalse(const bool tf) { serial_print(tf ? F("true") : F("false")); }
+void serialprint_truefalse(const bool tf) { SERIAL_ECHO(tf ? F("true") : F("false")); }
 
 void print_bin(uint16_t val) {
   for (uint8_t i = 16; i--;) {
@@ -97,11 +122,11 @@ void print_bin(uint16_t val) {
 }
 
 void print_pos(NUM_AXIS_ARGS_(const_float_t) FSTR_P const prefix/*=nullptr*/, FSTR_P const suffix/*=nullptr*/) {
-  if (prefix) serial_print(prefix);
+  if (prefix) SERIAL_ECHO(prefix);
   #if NUM_AXES
     SERIAL_ECHOPGM_P(
       LIST_N(DOUBLE(NUM_AXES), SP_X_STR, x, SP_Y_STR, y, SP_Z_STR, z, SP_I_STR, i, SP_J_STR, j, SP_K_STR, k, SP_U_STR, u, SP_V_STR, v, SP_W_STR, w)
     );
   #endif
-  if (suffix) serial_print(suffix); else SERIAL_EOL();
+  if (suffix) SERIAL_ECHO(suffix); else SERIAL_EOL();
 }