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MarlinFirmware/Marlin/gcode.cpp
Scott Lahteine 11c589c3ec Fix compile issue with G38 
Fixes #7250
2017-07-06 14:21:27 -05:00

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/**
* Marlin 3D Printer Firmware
* Copyright (C) 2016 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
*
* Based on Sprinter and grbl.
* Copyright (C) 2011 Camiel Gubbels / Erik van der Zalm
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
/**
* gcode.cpp - Parser for a GCode line, providing a parameter interface.
*/
#include "gcode.h"
#include "Marlin.h"
#include "language.h"
// Must be declared for allocation and to satisfy the linker
// Zero values need no initialization.
#if ENABLED(INCH_MODE_SUPPORT)
float GCodeParser::linear_unit_factor, GCodeParser::volumetric_unit_factor;
#endif
#if ENABLED(TEMPERATURE_UNITS_SUPPORT)
TempUnit GCodeParser::input_temp_units;
#endif
char *GCodeParser::command_ptr,
*GCodeParser::string_arg,
*GCodeParser::value_ptr;
char GCodeParser::command_letter;
int GCodeParser::codenum;
#if USE_GCODE_SUBCODES
uint8_t GCodeParser::subcode;
#endif
#if ENABLED(FASTER_GCODE_PARSER)
// Optimized Parameters
byte GCodeParser::codebits[4]; // found bits
uint8_t GCodeParser::param[26]; // parameter offsets from command_ptr
#else
char *GCodeParser::command_args; // start of parameters
#endif
// Create a global instance of the GCode parser singleton
GCodeParser parser;
/**
* Clear all code-seen (and value pointers)
*
* Since each param is set/cleared on seen codes,
* this may be optimized by commenting out ZERO(param)
*/
void GCodeParser::reset() {
string_arg = NULL; // No whole line argument
command_letter = '?'; // No command letter
codenum = 0; // No command code
#if USE_GCODE_SUBCODES
subcode = 0; // No command sub-code
#endif
#if ENABLED(FASTER_GCODE_PARSER)
ZERO(codebits); // No codes yet
//ZERO(param); // No parameters (should be safe to comment out this line)
#endif
}
// Populate all fields by parsing a single line of GCode
// 58 bytes of SRAM are used to speed up seen/value
void GCodeParser::parse(char *p) {
reset(); // No codes to report
// Skip spaces
while (*p == ' ') ++p;
// Skip N[-0-9] if included in the command line
if (*p == 'N' && NUMERIC_SIGNED(p[1])) {
#if ENABLED(FASTER_GCODE_PARSER)
//set('N', p + 1); // (optional) Set the 'N' parameter value
#endif
p += 2; // skip N[-0-9]
while (NUMERIC(*p)) ++p; // skip [0-9]*
while (*p == ' ') ++p; // skip [ ]*
}
// *p now points to the current command, which should be G, M, or T
command_ptr = p;
// Get the command letter, which must be G, M, or T
const char letter = *p++;
// Nullify asterisk and trailing whitespace
char *starpos = strchr(p, '*');
if (starpos) {
--starpos; // *
while (*starpos == ' ') --starpos; // spaces...
starpos[1] = '\0';
}
// Bail if the letter is not G, M, or T
switch (letter) { case 'G': case 'M': case 'T': break; default: return; }
// Skip spaces to get the numeric part
while (*p == ' ') p++;
// Bail if there's no command code number
if (!NUMERIC(*p)) return;
// Save the command letter at this point
// A '?' signifies an unknown command
command_letter = letter;
// Get the code number - integer digits only
codenum = 0;
do {
codenum *= 10, codenum += *p++ - '0';
} while (NUMERIC(*p));
// Allow for decimal point in command
#if USE_GCODE_SUBCODES
if (*p == '.') {
p++;
while (NUMERIC(*p))
subcode *= 10, subcode += *p++ - '0';
}
#endif
// Skip all spaces to get to the first argument, or nul
while (*p == ' ') p++;
// The command parameters (if any) start here, for sure!
#if DISABLED(FASTER_GCODE_PARSER)
command_args = p; // Scan for parameters in seen()
#endif
// Only use string_arg for these M codes
if (letter == 'M') switch (codenum) { case 23: case 28: case 30: case 117: case 118: case 928: string_arg = p; return; default: break; }
#if ENABLED(DEBUG_GCODE_PARSER)
const bool debug = codenum == 800;
#endif
/**
* Find all parameters, set flags and pointers for fast parsing
*
* Most codes ignore 'string_arg', but those that want a string will get the right pointer.
* The following loop assigns the first "parameter" having no numeric value to 'string_arg'.
* This allows M0/M1 with expire time to work: "M0 S5 You Win!"
*/
string_arg = NULL;
while (char code = *p++) { // Get the next parameter. A NUL ends the loop
// Special handling for M32 [P] !/path/to/file.g#
// The path must be the last parameter
if (code == '!' && letter == 'M' && codenum == 32) {
string_arg = p; // Name starts after '!'
char * const lb = strchr(p, '#'); // Already seen '#' as SD char (to pause buffering)
if (lb) *lb = '\0'; // Safe to mark the end of the filename
return;
}
// Arguments MUST be uppercase for fast GCode parsing
#if ENABLED(FASTER_GCODE_PARSER)
#define PARAM_TEST WITHIN(code, 'A', 'Z')
#else
#define PARAM_TEST true
#endif
if (PARAM_TEST) {
while (*p == ' ') p++; // Skip spaces between parameters & values
const bool has_num = DECIMAL_SIGNED(*p); // The parameter has a number [-+0-9.]
#if ENABLED(DEBUG_GCODE_PARSER)
if (debug) {
SERIAL_ECHOPAIR("Got letter ", code); // DEBUG
SERIAL_ECHOPAIR(" at index ", (int)(p - command_ptr - 1)); // DEBUG
if (has_num) SERIAL_ECHOPGM(" (has_num)");
}
#endif
if (!has_num && !string_arg) { // No value? First time, keep as string_arg
string_arg = p - 1;
#if ENABLED(DEBUG_GCODE_PARSER)
if (debug) SERIAL_ECHOPAIR(" string_arg: ", hex_address((void*)string_arg)); // DEBUG
#endif
}
#if ENABLED(DEBUG_GCODE_PARSER)
if (debug) SERIAL_EOL();
#endif
#if ENABLED(FASTER_GCODE_PARSER)
set(code, has_num ? p : NULL // Set parameter exists and pointer (NULL for no number)
#if ENABLED(DEBUG_GCODE_PARSER)
, debug
#endif
);
#endif
}
else if (!string_arg) { // Not A-Z? First time, keep as the string_arg
string_arg = p - 1;
#if ENABLED(DEBUG_GCODE_PARSER)
if (debug) SERIAL_ECHOPAIR(" string_arg: ", hex_address((void*)string_arg)); // DEBUG
#endif
}
if (!WITHIN(*p, 'A', 'Z')) {
while (*p && NUMERIC(*p)) p++; // Skip over the value section of a parameter
while (*p == ' ') p++; // Skip over all spaces
}
}
}
void GCodeParser::unknown_command_error() {
SERIAL_ECHO_START();
SERIAL_ECHOPAIR(MSG_UNKNOWN_COMMAND, command_ptr);
SERIAL_CHAR('"');
SERIAL_EOL();
}
#if ENABLED(DEBUG_GCODE_PARSER)
void GCodeParser::debug() {
SERIAL_ECHOPAIR("Command: ", command_ptr);
SERIAL_ECHOPAIR(" (", command_letter);
SERIAL_ECHO(codenum);
SERIAL_ECHOLNPGM(")");
#if ENABLED(FASTER_GCODE_PARSER)
SERIAL_ECHO(" args: \"");
for (char c = 'A'; c <= 'Z'; ++c)
if (seen(c)) { SERIAL_CHAR(c); SERIAL_CHAR(' '); }
#else
SERIAL_ECHOPAIR(" args: \"", command_args);
#endif
SERIAL_ECHOPGM("\"");
if (string_arg) {
SERIAL_ECHOPGM(" string: \"");
SERIAL_ECHO(string_arg);
SERIAL_CHAR('"');
}
SERIAL_ECHOPGM("\n\n");
for (char c = 'A'; c <= 'Z'; ++c) {
if (seen(c)) {
SERIAL_ECHOPAIR("Code '", c); SERIAL_ECHOPGM("':");
if (has_value()) {
SERIAL_ECHOPAIR("\n float: ", value_float());
SERIAL_ECHOPAIR("\n long: ", value_long());
SERIAL_ECHOPAIR("\n ulong: ", value_ulong());
SERIAL_ECHOPAIR("\n millis: ", value_millis());
SERIAL_ECHOPAIR("\n sec-ms: ", value_millis_from_seconds());
SERIAL_ECHOPAIR("\n int: ", value_int());
SERIAL_ECHOPAIR("\n ushort: ", value_ushort());
SERIAL_ECHOPAIR("\n byte: ", (int)value_byte());
SERIAL_ECHOPAIR("\n bool: ", (int)value_bool());
SERIAL_ECHOPAIR("\n linear: ", value_linear_units());
SERIAL_ECHOPAIR("\n celsius: ", value_celsius());
}
else
SERIAL_ECHOPGM(" (no value)");
SERIAL_ECHOPGM("\n\n");
}
}
}
#endif // DEBUG_GCODE_PARSER
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