gcode_parse.h

#ifndef _GCODE_PARSE_H
#define _GCODE_PARSE_H

#include  <stdint.h>

#include  "dda.h"

// wether to insist on N line numbers
// if not defined, N's are completely ignored
//#define REQUIRE_LINENUMBER

// wether to insist on a checksum
//#define REQUIRE_CHECKSUM

typedef struct {
  uint32_t  mantissa;   
  uint8_t exponent  :7; 
  uint8_t sign      :1; 
} decfloat;

typedef struct {
  union {
    struct {
      uint8_t         seen_G  :1;
      uint8_t         seen_M  :1;
      uint8_t         seen_X  :1;
      uint8_t         seen_Y  :1;
      uint8_t         seen_Z  :1;
      uint8_t         seen_E  :1;
      uint8_t         seen_F  :1;
      uint8_t         seen_S  :1;

      uint8_t         seen_P  :1;
      uint8_t         seen_T  :1;
      uint8_t         seen_N  :1;
      uint8_t         seen_checksum       :1; 
      uint8_t         seen_semi_comment   :1; 
      uint8_t         seen_parens_comment :1; 
      uint8_t         option_relative     :1; 
      uint8_t         option_inches       :1; 
    };
    uint16_t        flags;
  };

  uint8_t           G;        
  uint8_t           M;        
  TARGET            target;   

  int16_t           S;        
  uint16_t          P;        

  uint8_t           T;        

  uint32_t          N;        
  uint32_t          N_expected; 

  uint8_t           checksum_read;        
  uint8_t           checksum_calculated;  
} GCODE_COMMAND;

extern GCODE_COMMAND next_target;

void gcode_parse_char(uint8_t c);

// uses the global variable next_target.N
void request_resend(void);

#endif  /* _GCODE_PARSE_H */