ESP-IDF_Robot_RC

ESP-IDF_Robot_RC/main/espnow_example.h

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+/* ESPNOW Example
+
+   This example code is in the Public Domain (or CC0 licensed, at your option.)
+
+   Unless required by applicable law or agreed to in writing, this
+   software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+   CONDITIONS OF ANY KIND, either express or implied.
+*/
+
+#ifndef ESPNOW_EXAMPLE_H
+#define ESPNOW_EXAMPLE_H
+
+/* ESPNOW can work in both station and softap mode. It is configured in menuconfig. */
+#if CONFIG_ESPNOW_WIFI_MODE_STATION
+#define ESPNOW_WIFI_MODE WIFI_MODE_STA
+#define ESPNOW_WIFI_IF   ESP_IF_WIFI_STA
+#else
+#define ESPNOW_WIFI_MODE WIFI_MODE_AP
+#define ESPNOW_WIFI_IF   ESP_IF_WIFI_AP
+#endif
+
+#define ESPNOW_QUEUE_SIZE           6
+
+#define IS_BROADCAST_ADDR(addr) (memcmp(addr, s_example_broadcast_mac, ESP_NOW_ETH_ALEN) == 0)
+
+typedef enum {
+    EXAMPLE_ESPNOW_SEND_CB,
+    EXAMPLE_ESPNOW_RECV_CB,
+} example_espnow_event_id_t;
+
+typedef struct {
+    uint8_t mac_addr[ESP_NOW_ETH_ALEN];
+    esp_now_send_status_t status;
+} example_espnow_event_send_cb_t;
+
+typedef struct {
+    uint8_t mac_addr[ESP_NOW_ETH_ALEN];
+    uint8_t *data;
+    int data_len;
+} example_espnow_event_recv_cb_t;
+
+typedef union {
+    example_espnow_event_send_cb_t send_cb;
+    example_espnow_event_recv_cb_t recv_cb;
+} example_espnow_event_info_t;
+
+/* When ESPNOW sending or receiving callback function is called, post event to ESPNOW task. */
+typedef struct {
+    example_espnow_event_id_t id;
+    example_espnow_event_info_t info;
+} example_espnow_event_t;
+
+enum {
+    EXAMPLE_ESPNOW_DATA_BROADCAST,
+    EXAMPLE_ESPNOW_DATA_UNICAST,
+    EXAMPLE_ESPNOW_DATA_MAX,
+};
+
+/* User defined field of ESPNOW data in this example. */
+typedef struct {
+    uint8_t type;                         //Broadcast or unicast ESPNOW data.
+    uint8_t state;                        //Indicate that if has received broadcast ESPNOW data or not.
+    uint16_t seq_num;                     //Sequence number of ESPNOW data.
+    uint16_t crc;                         //CRC16 value of ESPNOW data.
+    uint32_t magic;                       //Magic number which is used to determine which device to send unicast ESPNOW data.
+    uint8_t payload[0];                   //Real payload of ESPNOW data.
+} __attribute__((packed)) example_espnow_data_t;
+
+/* Parameters of sending ESPNOW data. */
+typedef struct {
+    bool unicast;                         //Send unicast ESPNOW data.
+    bool broadcast;                       //Send broadcast ESPNOW data.
+    uint8_t state;                        //Indicate that if has received broadcast ESPNOW data or not.
+    uint32_t magic;                       //Magic number which is used to determine which device to send unicast ESPNOW data.
+    uint16_t count;                       //Total count of unicast ESPNOW data to be sent.
+    uint16_t delay;                       //Delay between sending two ESPNOW data, unit: ms.
+    int len;                              //Length of ESPNOW data to be sent, unit: byte.
+    uint8_t *buffer;                      //Buffer pointing to ESPNOW data.
+    uint8_t dest_mac[ESP_NOW_ETH_ALEN];   //MAC address of destination device.
+} example_espnow_send_param_t;
+
+#endif