OVMS3-idf/examples/bluetooth/ble_eddystone/main/esp_eddystone_protocol.h

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2018-01-15 11:47:23 +00:00
/*
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 __ESP_EDDYSTONE_PROTOCOL_H__
#define __ESP_EDDYSTONE_PROTOCOL_H__
#include "stdbool.h"
#include "stdint.h"
/* Eddystone definitions */
#define EDDYSTONE_SERVICE_UUID 0xFEAA
#define EDDYSTONE_FRAME_TYPE_UID 0x00
#define EDDYSTONE_FRAME_TYPE_URL 0x10
#define EDDYSTONE_FRAME_TYPE_TLM 0x20
#define EDDYSTONE_FRAME_TYPE_EID 0x30
#define EDDYSTONE_UID_FRAME_LEN 0x17
#define EDDYSTONE_TLM_FRAME_LEN 0x11
#define EDDYSTONE_URL_MAX_LEN 18
/* Eddystone UID frame */
typedef struct {
int8_t ranging_data; /*<! calibrated Tx power at 0m */
uint8_t namespace_id[10];
uint8_t instance_id[6];
uint8_t reserved[2];
} __attribute__((packed))esp_eddystone_uid_t;
/* Eddystone URL frame */
typedef struct {
int8_t tx_power; /*<! calibrated Tx power at 0m */
uint8_t url_scheme; /*<! encoded scheme prefix */
uint8_t encoded_url[0]; /*<! length 1-17 */
} __attribute__((packed))esp_eddystone_url_t;
/* Eddystone TLM frame */
typedef struct {
uint8_t version; /*<! TLM version,0x00 for now */
uint16_t batt; /*<! battery voltage, 1mV/bit */
uint16_t temp; /*<! beacon temperature */
uint32_t adv_count; /*<! adv pdu count since power-on or reboot */
uint32_t time; /*<! time sence power-on or reboot, a 0.1 second resolution counter */
} __attribute__((packed)) esp_eddystone_tlm_t;
/* AD Structure of flags */
typedef struct {
uint8_t len;
uint8_t type;
uint8_t flags;
} __attribute__((packed)) esp_eddystone_flags_t;
/* AD Structure of complete 16-bit service uuid */
typedef struct {
uint8_t len;
uint8_t type;
uint16_t uuid; /*<! complete list of 16-bit service UUIDs data type value */
} __attribute__((packed)) esp_eddystone_uuid_t;
/* AD Structure of eddystone frame*/
typedef struct {
uint8_t len; /*<! length of eddystone data */
uint8_t type; /*<! service data type,must be 0x16 */
uint16_t uuid; /*<! 16-bit eddystone uuid */
uint8_t frame_type;
union {
esp_eddystone_uid_t uid;
esp_eddystone_url_t url;
esp_eddystone_tlm_t tlm;
} u[0];
} __attribute__((packed)) esp_eddystone_frame_t;
/* eddystone packet type */
typedef struct {
esp_eddystone_flags_t flags;
esp_eddystone_uuid_t uuid;
esp_eddystone_frame_t frame;
} __attribute__((packed)) esp_eddystone_packet_t;
/*
* URLs are written only with the graphic printable characters of the US-ASCII coded character set.
* The octets 00-20 and 7F-FF hexadecimal are not used.
* See Excluded US-ASCII Characters in RFC 2936.
*
*/
static inline bool esp_eddystone_is_char_invalid(int ch)
{
return (ch >= 0x00 && ch <= 0x20) || (ch >= 0x7f && ch <= 0xff);
}
#endif /* __ESP_EDDYSTONE_PROTOCOL_H__ */