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#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
/// this is a very crude decimal-based floating point structure.
/// a real floating point would at least have signed exponent.\n
/// resulting value is \f$ mantissa * 10^{-(exponent - 1)} * ((sign * 2) - 1)\f$
typedef struct {
uint32_t mantissa; ///< the actual digits of our floating point number
uint8_t exponent :7; ///< scale mantissa by \f$10^{-exponent}\f$
uint8_t sign :1; ///< positive or negative?
} decfloat;
/// this holds all the possible data from a received command
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; ///< seen a checksum?
uint8_t seen_semi_comment :1; ///< seen a semicolon?
uint8_t seen_parens_comment :1; ///< seen an open parenthesis
uint8_t option_relative :1; ///< relative or absolute coordinates?
uint8_t option_inches :1; ///< inches or millimeters?
};
uint16_t flags;
};
uint8_t G; ///< G command number
uint8_t M; ///< M command number
TARGET target; ///< target position: X, Y, Z, E and F
int16_t S; ///< S word (various uses)
uint16_t P; ///< P word (various uses)
uint8_t T; ///< T word (tool index)
uint32_t N; ///< line number
uint32_t N_expected; ///< expected line number
uint8_t checksum_read; ///< checksum in gcode command
uint8_t checksum_calculated; ///< checksum we calculated
} GCODE_COMMAND;
/// the command being processed
extern GCODE_COMMAND next_target;
/// accept the next character and process it
void gcode_parse_char(uint8_t c);
// uses the global variable next_target.N
void request_resend(void);
#endif /* _GCODE_PARSE_H */