settings.h

/*
  settings.h - eeprom configuration handling 
  Part of Grbl

  The MIT License (MIT)

  GRBL(tm) - Embedded CNC g-code interpreter and motion-controller
  Copyright (c) 2009-2011 Simen Svale Skogsrud
  Copyright (c) 2011-2012 Sungeun K. Jeon

  Permission is hereby granted, free of charge, to any person obtaining a copy
  of this software and associated documentation files (the "Software"), to deal
  in the Software without restriction, including without limitation the rights
  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  copies of the Software, and to permit persons to whom the Software is
  furnished to do so, subject to the following conditions:

  The above copyright notice and this permission notice shall be included in
  all copies or substantial portions of the Software.

  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  THE SOFTWARE.
*/

#ifndef settings_h
#define settings_h

#include <math.h>
#include "nuts_bolts.h"

#define GRBL_VERSION "0.8c"

// Version of the EEPROM data. Will be used to migrate existing data from older versions of Grbl
// when firmware is upgraded. Always stored in byte 0 of eeprom
#define SETTINGS_VERSION 5

// Define bit flag masks for the boolean settings in settings.flag.
#define BITFLAG_REPORT_INCHES      bit(0)
#define BITFLAG_AUTO_START         bit(1)
#define BITFLAG_INVERT_ST_ENABLE   bit(2)
#define BITFLAG_HARD_LIMIT_ENABLE  bit(3)
#define BITFLAG_HOMING_ENABLE      bit(4)

// Define EEPROM memory address location values for Grbl settings and parameters
// NOTE: The Atmega328p has 1KB EEPROM. The upper half is reserved for parameters and
// the startup script. The lower half contains the global settings and space for future 
// developments.
#define EEPROM_ADDR_GLOBAL 1
#define EEPROM_ADDR_PARAMETERS 512
#define EEPROM_ADDR_STARTUP_BLOCK 768

// Define EEPROM address indexing for coordinate parameters
#define N_COORDINATE_SYSTEM 6  // Number of supported work coordinate systems (from index 1)
#define SETTING_INDEX_NCOORD N_COORDINATE_SYSTEM+1 // Total number of system stored (from index 0)
// NOTE: Work coordinate indices are (0=G54, 1=G55, ... , 6=G59)
#define SETTING_INDEX_G28    N_COORDINATE_SYSTEM    // Home position 1
#define SETTING_INDEX_G30    N_COORDINATE_SYSTEM+1  // Home position 2
// #define SETTING_INDEX_G92    N_COORDINATE_SYSTEM+2  // Coordinate offset (G92.2,G92.3 not supported)

// Global persistent settings (Stored from byte EEPROM_ADDR_GLOBAL onwards)
typedef struct {
  float steps_per_mm[3];
  uint8_t microsteps;
  uint8_t pulse_microseconds;
  float default_feed_rate;
  float default_seek_rate;
  uint8_t invert_mask;
  float mm_per_arc_segment;
  float acceleration;
  float junction_deviation;
  uint8_t flags;  // Contains default boolean settings
  uint8_t homing_dir_mask;
  float homing_feed_rate;
  float homing_seek_rate;
  uint16_t homing_debounce_delay;
  float homing_pulloff;
  uint8_t stepper_idle_lock_time; // If max value 255, steppers do not disable.
  uint8_t decimal_places;
  uint8_t n_arc_correction;
//  uint8_t status_report_mask; // Mask to indicate desired report data.
} settings_t;
extern settings_t settings;

// Initialize the configuration subsystem (load settings from EEPROM)
void settings_init();

// A helper method to set new settings from command line
uint8_t settings_store_global_setting(int parameter, float value);

// Stores the protocol line variable as a startup line in EEPROM
void settings_store_startup_line(uint8_t n, char *line);

// Reads an EEPROM startup line to the protocol line variable
uint8_t settings_read_startup_line(uint8_t n, char *line);

// Writes selected coordinate data to EEPROM
void settings_write_coord_data(uint8_t coord_select, float *coord_data);

// Reads selected coordinate data from EEPROM
uint8_t settings_read_coord_data(uint8_t coord_select, float *coord_data);

#endif