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317 lines
11 KiB
C++
317 lines
11 KiB
C++
/**
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* Marlin 3D Printer Firmware
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* Copyright (C) 2016 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
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*
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* Based on Sprinter and grbl.
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* Copyright (C) 2011 Camiel Gubbels / Erik van der Zalm
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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/**
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* parser.h - Parser for a GCode line, providing a parameter interface.
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* Codes like M149 control the way the GCode parser behaves,
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* so settings for these codes are located in this class.
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*/
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#ifndef _PARSER_H_
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#define _PARSER_H_
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#include "../inc/MarlinConfig.h"
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//#define DEBUG_GCODE_PARSER
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/**
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* GCode parser
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*
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* - Parse a single gcode line for its letter, code, subcode, and parameters
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* - FASTER_GCODE_PARSER:
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* - Flags existing params (1 bit each)
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* - Stores value offsets (1 byte each)
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* - Provide accessors for parameters:
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* - Parameter exists
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* - Parameter has value
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* - Parameter value in different units and types
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*/
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class GCodeParser {
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private:
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static char *value_ptr; // Set by seen, used to fetch the value
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#if ENABLED(FASTER_GCODE_PARSER)
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static byte codebits[4]; // Parameters pre-scanned
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static uint8_t param[26]; // For A-Z, offsets into command args
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#else
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static char *command_args; // Args start here, for slow scan
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#endif
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public:
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// Global states for GCode-level units features
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static bool volumetric_enabled;
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#if ENABLED(INCH_MODE_SUPPORT)
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static float linear_unit_factor, volumetric_unit_factor;
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#endif
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#if ENABLED(TEMPERATURE_UNITS_SUPPORT)
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static TempUnit input_temp_units;
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#endif
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// Command line state
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static char *command_ptr, // The command, so it can be echoed
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*string_arg; // string of command line
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static char command_letter; // G, M, or T
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static int codenum; // 123
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#if USE_GCODE_SUBCODES
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static uint8_t subcode; // .1
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#endif
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#if ENABLED(DEBUG_GCODE_PARSER)
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void debug();
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#endif
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// Reset is done before parsing
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static void reset();
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// Index so that 'X' falls on index 24
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#define PARAM_IND(N) ((N) >> 3)
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#define PARAM_BIT(N) ((N) & 0x7)
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#define LETTER_OFF(N) ((N) - 'A')
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#define LETTER_IND(N) PARAM_IND(LETTER_OFF(N))
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#define LETTER_BIT(N) PARAM_BIT(LETTER_OFF(N))
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#if ENABLED(FASTER_GCODE_PARSER)
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// Set the flag and pointer for a parameter
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static void set(const char c, char * const ptr
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#if ENABLED(DEBUG_GCODE_PARSER)
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, const bool debug=false
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#endif
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) {
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const uint8_t ind = LETTER_OFF(c);
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if (ind >= COUNT(param)) return; // Only A-Z
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SBI(codebits[PARAM_IND(ind)], PARAM_BIT(ind)); // parameter exists
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param[ind] = ptr ? ptr - command_ptr : 0; // parameter offset or 0
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#if ENABLED(DEBUG_GCODE_PARSER)
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if (debug) {
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SERIAL_ECHOPAIR("Set bit ", (int)PARAM_BIT(ind));
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SERIAL_ECHOPAIR(" of index ", (int)PARAM_IND(ind));
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SERIAL_ECHOLNPAIR(" | param = ", (int)param[ind]);
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}
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#endif
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}
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// Code seen bit was set. If not found, value_ptr is unchanged.
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// This allows "if (seen('A')||seen('B'))" to use the last-found value.
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static bool seen(const char c) {
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const uint8_t ind = LETTER_OFF(c);
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if (ind >= COUNT(param)) return false; // Only A-Z
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const bool b = TEST(codebits[PARAM_IND(ind)], PARAM_BIT(ind));
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if (b) value_ptr = param[ind] ? command_ptr + param[ind] : (char*)NULL;
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return b;
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}
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static bool seen_any() { return codebits[3] || codebits[2] || codebits[1] || codebits[0]; }
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#define SEEN_TEST(L) TEST(codebits[LETTER_IND(L)], LETTER_BIT(L))
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#else // !FASTER_GCODE_PARSER
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// Code is found in the string. If not found, value_ptr is unchanged.
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// This allows "if (seen('A')||seen('B'))" to use the last-found value.
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static bool seen(const char c) {
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char *p = strchr(command_args, c);
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const bool b = !!p;
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if (b) value_ptr = DECIMAL_SIGNED(p[1]) ? &p[1] : (char*)NULL;
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return b;
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}
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static bool seen_any() { return *command_args == '\0'; }
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#define SEEN_TEST(L) !!strchr(command_args, L)
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#endif // !FASTER_GCODE_PARSER
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// Seen any axis parameter
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static bool seen_axis() {
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return SEEN_TEST('X') || SEEN_TEST('Y') || SEEN_TEST('Z') || SEEN_TEST('E');
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}
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// Populate all fields by parsing a single line of GCode
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// This uses 54 bytes of SRAM to speed up seen/value
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static void parse(char * p);
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#if ENABLED(CNC_COORDINATE_SYSTEMS)
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// Parse the next parameter as a new command
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static bool chain();
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#endif
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// The code value pointer was set
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FORCE_INLINE static bool has_value() { return value_ptr != NULL; }
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// Seen a parameter with a value
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inline static bool seenval(const char c) { return seen(c) && has_value(); }
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// Float removes 'E' to prevent scientific notation interpretation
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inline static float value_float() {
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if (value_ptr) {
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char *e = value_ptr;
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for (;;) {
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const char c = *e;
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if (c == '\0' || c == ' ') break;
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if (c == 'E' || c == 'e') {
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*e = '\0';
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const float ret = strtod(value_ptr, NULL);
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*e = c;
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return ret;
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}
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++e;
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}
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return strtod(value_ptr, NULL);
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}
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return 0.0;
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}
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// Code value as a long or ulong
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inline static int32_t value_long() { return value_ptr ? strtol(value_ptr, NULL, 10) : 0L; }
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inline static uint32_t value_ulong() { return value_ptr ? strtoul(value_ptr, NULL, 10) : 0UL; }
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// Code value for use as time
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FORCE_INLINE static millis_t value_millis() { return value_ulong(); }
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FORCE_INLINE static millis_t value_millis_from_seconds() { return value_float() * 1000UL; }
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// Reduce to fewer bits
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FORCE_INLINE static int16_t value_int() { return (int16_t)value_long(); }
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FORCE_INLINE static uint16_t value_ushort() { return (uint16_t)value_long(); }
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inline static uint8_t value_byte() { return (uint8_t)constrain(value_long(), 0, 255); }
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// Bool is true with no value or non-zero
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inline static bool value_bool() { return !has_value() || value_byte(); }
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// Units modes: Inches, Fahrenheit, Kelvin
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#if ENABLED(INCH_MODE_SUPPORT)
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inline static void set_input_linear_units(const LinearUnit units) {
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switch (units) {
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case LINEARUNIT_INCH:
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linear_unit_factor = 25.4;
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break;
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case LINEARUNIT_MM:
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default:
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linear_unit_factor = 1.0;
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break;
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}
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volumetric_unit_factor = POW(linear_unit_factor, 3.0);
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}
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inline static float axis_unit_factor(const AxisEnum axis) {
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return (axis >= E_AXIS && volumetric_enabled ? volumetric_unit_factor : linear_unit_factor);
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}
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inline static float value_linear_units() { return value_float() * linear_unit_factor; }
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inline static float value_axis_units(const AxisEnum axis) { return value_float() * axis_unit_factor(axis); }
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inline static float value_per_axis_unit(const AxisEnum axis) { return value_float() / axis_unit_factor(axis); }
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#else
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FORCE_INLINE static float value_linear_units() { return value_float(); }
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FORCE_INLINE static float value_axis_units(const AxisEnum a) { UNUSED(a); return value_float(); }
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FORCE_INLINE static float value_per_axis_unit(const AxisEnum a) { UNUSED(a); return value_float(); }
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#endif
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#if ENABLED(TEMPERATURE_UNITS_SUPPORT)
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inline static void set_input_temp_units(TempUnit units) { input_temp_units = units; }
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#if ENABLED(ULTIPANEL) && DISABLED(DISABLE_M503)
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FORCE_INLINE static char temp_units_code() {
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return input_temp_units == TEMPUNIT_K ? 'K' : input_temp_units == TEMPUNIT_F ? 'F' : 'C';
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}
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FORCE_INLINE static const char* temp_units_name() {
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return input_temp_units == TEMPUNIT_K ? PSTR("Kelvin") : input_temp_units == TEMPUNIT_F ? PSTR("Fahrenheit") : PSTR("Celsius");
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}
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inline static float to_temp_units(const float &f) {
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switch (input_temp_units) {
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case TEMPUNIT_F:
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return f * 0.5555555556 + 32.0;
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case TEMPUNIT_K:
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return f + 273.15;
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case TEMPUNIT_C:
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default:
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return f;
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}
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}
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#endif // ULTIPANEL && !DISABLE_M503
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inline static float value_celsius() {
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const float f = value_float();
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switch (input_temp_units) {
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case TEMPUNIT_F:
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return (f - 32.0) * 0.5555555556;
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case TEMPUNIT_K:
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return f - 273.15;
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case TEMPUNIT_C:
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default:
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return f;
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}
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}
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inline static float value_celsius_diff() {
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switch (input_temp_units) {
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case TEMPUNIT_F:
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return value_float() * 0.5555555556;
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case TEMPUNIT_C:
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case TEMPUNIT_K:
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default:
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return value_float();
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}
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}
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#else // !TEMPERATURE_UNITS_SUPPORT
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FORCE_INLINE static float value_celsius() { return value_float(); }
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FORCE_INLINE static float value_celsius_diff() { return value_float(); }
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#endif // !TEMPERATURE_UNITS_SUPPORT
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FORCE_INLINE static float value_feedrate() { return value_linear_units(); }
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void unknown_command_error();
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// Provide simple value accessors with default option
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FORCE_INLINE static float floatval(const char c, const float dval=0.0) { return seenval(c) ? value_float() : dval; }
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FORCE_INLINE static bool boolval(const char c) { return seenval(c) ? value_bool() : seen(c); }
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FORCE_INLINE static uint8_t byteval(const char c, const uint8_t dval=0) { return seenval(c) ? value_byte() : dval; }
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FORCE_INLINE static int16_t intval(const char c, const int16_t dval=0) { return seenval(c) ? value_int() : dval; }
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FORCE_INLINE static uint16_t ushortval(const char c, const uint16_t dval=0) { return seenval(c) ? value_ushort() : dval; }
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FORCE_INLINE static int32_t longval(const char c, const int32_t dval=0) { return seenval(c) ? value_long() : dval; }
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FORCE_INLINE static uint32_t ulongval(const char c, const uint32_t dval=0) { return seenval(c) ? value_ulong() : dval; }
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FORCE_INLINE static float linearval(const char c, const float dval=0.0) { return seenval(c) ? value_linear_units() : dval; }
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FORCE_INLINE static float celsiusval(const char c, const float dval=0.0) { return seenval(c) ? value_celsius() : dval; }
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FORCE_INLINE static const char* strval(const char c) { return seenval(c) ? value_ptr : NULL; }
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};
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extern GCodeParser parser;
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#endif // _PARSER_H_
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