esp_now_netdev.h

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/*
 * Copyright (C) 2018 Gunar Schorcht
 *
 * This file is subject to the terms and conditions of the GNU Lesser
 * General Public License v2.1. See the file LICENSE in the top level
 * directory for more details.
 */
 
#pragma once

 
#include "net/netdev.h"
#include "mutex.h"
#include "net/ethernet/hdr.h"
#ifdef MODULE_GNRC
#include "net/gnrc/nettype.h"
#endif
 
#ifdef __cplusplus
extern "C" {
#endif

#define ESP_NOW_MAX_SIZE_RAW (250)

#define ESP_NOW_ADDR_LEN ETHERNET_ADDR_LEN

#define ESP_NOW_HEADER_LENGTH (sizeof(esp_now_pkt_hdr_t))

#define ESP_NOW_MAX_SIZE (ESP_NOW_MAX_SIZE_RAW - ESP_NOW_HEADER_LENGTH)

#ifndef ESP_NOW_BUFSIZE
#define ESP_NOW_BUFSIZE (ESP_NOW_MAX_SIZE_RAW + ESP_NOW_ADDR_LEN)
#endif

extern const netdev_driver_t esp_now_driver;

typedef struct __attribute__((packed))
{
    uint8_t flags; 
} esp_now_pkt_hdr_t;

#define ESP_NOW_PKT_HDR_FLAG_SIXLO (1)

typedef struct
{
    netdev_t netdev;                 
 
    uint8_t addr[ESP_NOW_ADDR_LEN];  
 
    uint8_t rx_len;                  
    uint8_t* rx_mac;                 
    uint8_t* rx_data;                
 
    uint8_t tx_mem[ESP_NOW_MAX_SIZE_RAW]; 
 
#ifdef MODULE_GNRC
    gnrc_nettype_t proto;            
#endif
 
    mutex_t dev_lock;                
 
    uint8_t scan_event;              
 
} esp_now_netdev_t;

esp_now_netdev_t *netdev_esp_now_setup(void);

int esp_now_set_channel(uint8_t channel);
 
#ifdef __cplusplus
}
#endif