protocol.h

 
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <pico/binary_info.h>
#include <pico/stdlib.h>
#include <pico/stdio_usb.h>
#include <comms/common.h>
#include <string.h>
#include <search.h>
 
#ifndef PROTOCOL_H
#define PROTOCOL_H
 
#define MAX_RADIX_TOPICS 16
 
typedef int (*Deserialize)(uint8_t* src, void* dest);
typedef int (*Serialize)(void* src, uint8_t* dest);
typedef void (*MsgCb)(void* data);
 
typedef struct topic_registry_val{
    uint16_t topic_id;
    int32_t topic_data_len;
    Deserialize deserialize_fn;
    Serialize serialize_fn;
    MsgCb cb_fn;
}topic_registry_val_t;
 
typedef struct topic_registry_entry{
    struct topic_registry_entry* left;
    struct topic_registry_entry* right;
    struct topic_registry_val* value;
}topic_registry_entry_t;
 
extern topic_registry_entry_t* topic_registry_root_node;
 
int comms_init_protocol(void);
int comms_register_topic(uint16_t topic_id,
    uint32_t topic_data_len,
    Deserialize deserialize_fn,
    Serialize serialize_fn,
    MsgCb callback_fn);
int comms_get_topic_serializers(uint16_t topic_id, topic_registry_val_t* topic_reg_val);
int comms_generate_packet(uint16_t topic_id, void* topic_struct, uint8_t** packet_out, uint32_t* packet_len_out);
int comms_send_serial(uint8_t* packet_out, uint32_t packet_len);
int comms_write_topic_test(uint16_t topic_id, void* topic_struct);
int comms_write_topic(uint16_t topic_id, void* topic_struct);
 
#endif