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#ifndef FRAMING_H
#define FRAMING_H
#ifdef __cplusplus
extern "C" {
#endif
#include <stdbool.h>
#include <inttypes.h>
#define MAX_FRAME_SIZE 128
#define FRAME_ESCAPE 0x10
#define FRAME_START 0x02
#define FRAME_STOP 0x03
typedef enum {
WAITING,
RECEIVING,
ESCAPING
} link_state;
typedef void (*receive_frame_function)(int16_t size, uint8_t* data);
typedef void (*send_byte_function)(uint8_t byte);
typedef struct {
link_state state; // current state
uint8_t buffer[MAX_FRAME_SIZE]; // in data buffer
uint8_t staged; // previously read byte, will be put in buffer after next read
int16_t position; //current position of next byte to be read in buffer
uint8_t checksum; //current value of calculated checksum
receive_frame_function receiver;
send_byte_function sender;
} framer;
void init_framer(framer* f);
void receive_byte(framer* f, uint8_t byte);
void send_frame(framer* f, int16_t size, const uint8_t * const data_out);
#ifdef __cplusplus
} // extern "C"
#endif
#endif /* FRAMING_H */
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