Use 'p' for port index

Marlin/src/gcode/queue.cpp

@@ -473,13 +473,13 @@ void GCodeQueue::get_serial_commands() {
    * Loop while serial characters are incoming and the queue is not full
    */
   while (length < BUFSIZE && serial_data_available()) {
-    LOOP_L_N(i, NUM_SERIAL) {
+    LOOP_L_N(p, NUM_SERIAL) {
 
-      const int c = read_serial(i);
+      const int c = read_serial(p);
       if (c < 0) continue;
 
       #if ENABLED(MEATPACK)
-        meatpack.handle_rx_char(uint8_t(c),i);
+        meatpack.handle_rx_char(uint8_t(c), p);
         char c_res[2] = { 0, 0 };
         const uint8_t char_count = meatpack.get_result_char(c_res);
       #else
@@ -492,10 +492,10 @@ void GCodeQueue::get_serial_commands() {
         if (ISEOL(serial_char)) {
 
           // Reset our state, continue if the line was empty
-          if (process_line_done(serial_input_state[i], serial_line_buffer[i], serial_count[i]))
+          if (process_line_done(serial_input_state[p], serial_line_buffer[p], serial_count[p]))
             continue;
 
-          char* command = serial_line_buffer[i];
+          char* command = serial_line_buffer[p];
 
           while (*command == ' ') command++;                   // Skip leading spaces
           char *npos = (*command == 'N') ? command : nullptr;  // Require the N parameter to start the line
@@ -511,25 +511,25 @@ void GCodeQueue::get_serial_commands() {
 
             const long gcode_N = strtol(npos + 1, nullptr, 10);
 
-            if (gcode_N != last_N[i] + 1 && !M110)
-              return gcode_line_error(PSTR(STR_ERR_LINE_NO), i);
+            if (gcode_N != last_N[p] + 1 && !M110)
+              return gcode_line_error(PSTR(STR_ERR_LINE_NO), p);
 
             char *apos = strrchr(command, '*');
             if (apos) {
               uint8_t checksum = 0, count = uint8_t(apos - command);
               while (count) checksum ^= command[--count];
               if (strtol(apos + 1, nullptr, 10) != checksum)
-                return gcode_line_error(PSTR(STR_ERR_CHECKSUM_MISMATCH), i);
+                return gcode_line_error(PSTR(STR_ERR_CHECKSUM_MISMATCH), p);
             }
             else
-              return gcode_line_error(PSTR(STR_ERR_NO_CHECKSUM), i);
+              return gcode_line_error(PSTR(STR_ERR_NO_CHECKSUM), p);
 
-            last_N[i] = gcode_N;
+            last_N[p] = gcode_N;
           }
           #if ENABLED(SDSUPPORT)
             // Pronterface "M29" and "M29 " has no line number
             else if (card.flag.saving && !is_M29(command))
-              return gcode_line_error(PSTR(STR_ERR_NO_CHECKSUM), i);
+              return gcode_line_error(PSTR(STR_ERR_NO_CHECKSUM), p);
           #endif
 
           //
@@ -547,7 +547,7 @@ void GCodeQueue::get_serial_commands() {
                 #if ENABLED(BEZIER_CURVE_SUPPORT)
                   case 5:
                 #endif
-                  PORT_REDIRECT(i);                      // Reply to the serial port that sent the command
+                  PORT_REDIRECT(p);                      // Reply to the serial port that sent the command
                   SERIAL_ECHOLNPGM(STR_ERR_STOPPED);
                   LCD_MESSAGEPGM(MSG_STOPPED);
                   break;
@@ -569,9 +569,9 @@ void GCodeQueue::get_serial_commands() {
           #endif
 
           // Add the command to the queue
-          _enqueue(serial_line_buffer[i], true
+          _enqueue(serial_line_buffer[p], true
             #if HAS_MULTI_SERIAL
-              , i
+              , p
             #endif
           );
         }