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47 lines
985 B
C++

#ifndef __P_SERIAL_PACKET_H__
#define __P_SERIAL_PACKET_H__
// start byte
// src_addr {1} +
// dest_addr {1} +
// frame_length {1} +
// checksum {1} +
// frame_data {510} -- making it 510 instead of 511 so it is easily divisible
#define MAX_MESSAGE_LEN (516)
#define MAX_FRAME_DATA_LEN (510)
#define MASTER_ADDR (0x01)
#include <cinttypes>
#include <iostream>
class ps_packet
{
public:
// for encoding
ps_packet(uint8_t _src_addr, uint8_t _dest_addr, uint8_t* _frame_data,
uint8_t _frame_data_len);
// for decoding
ps_packet(uint8_t* data);
~ps_packet();
uint8_t* src_addr;
uint8_t* dest_addr;
uint8_t* frame_data_len;
uint8_t* checksum;
uint8_t* frame_data;
uint8_t data[MAX_MESSAGE_LEN];
std::size_t msg_len;
bool encode();
bool decode();
static ps_packet from_xy(int x, int y);
static ps_packet test_packet();
#ifdef DEBUG
void show_packet();
#endif
private:
bool stuff_bytes();
bool destuff_bytes();
bool validate();
uint8_t calc_checksum();
};
#endif