97 lines
3.2 KiB
C
97 lines
3.2 KiB
C
/*
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This example code is in the Public Domain (or CC0 licensed, at your option.)
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Unless required by applicable law or agreed to in writing, this
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software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
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CONDITIONS OF ANY KIND, either express or implied.
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*/
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#ifndef __ESP_EDDYSTONE_PROTOCOL_H__
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#define __ESP_EDDYSTONE_PROTOCOL_H__
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#include "stdbool.h"
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#include "stdint.h"
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/* Eddystone definitions */
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#define EDDYSTONE_SERVICE_UUID 0xFEAA
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#define EDDYSTONE_FRAME_TYPE_UID 0x00
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#define EDDYSTONE_FRAME_TYPE_URL 0x10
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#define EDDYSTONE_FRAME_TYPE_TLM 0x20
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#define EDDYSTONE_FRAME_TYPE_EID 0x30
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#define EDDYSTONE_UID_FRAME_LEN 0x17
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#define EDDYSTONE_TLM_FRAME_LEN 0x11
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#define EDDYSTONE_URL_MAX_LEN 18
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/* Eddystone UID frame */
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typedef struct {
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int8_t ranging_data; /*<! calibrated Tx power at 0m */
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uint8_t namespace_id[10];
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uint8_t instance_id[6];
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uint8_t reserved[2];
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} __attribute__((packed))esp_eddystone_uid_t;
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/* Eddystone URL frame */
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typedef struct {
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int8_t tx_power; /*<! calibrated Tx power at 0m */
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uint8_t url_scheme; /*<! encoded scheme prefix */
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uint8_t encoded_url[0]; /*<! length 1-17 */
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} __attribute__((packed))esp_eddystone_url_t;
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/* Eddystone TLM frame */
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typedef struct {
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uint8_t version; /*<! TLM version,0x00 for now */
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uint16_t batt; /*<! battery voltage, 1mV/bit */
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uint16_t temp; /*<! beacon temperature */
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uint32_t adv_count; /*<! adv pdu count since power-on or reboot */
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uint32_t time; /*<! time sence power-on or reboot, a 0.1 second resolution counter */
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} __attribute__((packed)) esp_eddystone_tlm_t;
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/* AD Structure of flags */
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typedef struct {
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uint8_t len;
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uint8_t type;
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uint8_t flags;
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} __attribute__((packed)) esp_eddystone_flags_t;
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/* AD Structure of complete 16-bit service uuid */
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typedef struct {
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uint8_t len;
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uint8_t type;
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uint16_t uuid; /*<! complete list of 16-bit service UUIDs data type value */
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} __attribute__((packed)) esp_eddystone_uuid_t;
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/* AD Structure of eddystone frame*/
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typedef struct {
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uint8_t len; /*<! length of eddystone data */
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uint8_t type; /*<! service data type,must be 0x16 */
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uint16_t uuid; /*<! 16-bit eddystone uuid */
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uint8_t frame_type;
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union {
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esp_eddystone_uid_t uid;
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esp_eddystone_url_t url;
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esp_eddystone_tlm_t tlm;
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} u[0];
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} __attribute__((packed)) esp_eddystone_frame_t;
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/* eddystone packet type */
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typedef struct {
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esp_eddystone_flags_t flags;
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esp_eddystone_uuid_t uuid;
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esp_eddystone_frame_t frame;
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} __attribute__((packed)) esp_eddystone_packet_t;
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/*
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* URLs are written only with the graphic printable characters of the US-ASCII coded character set.
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* The octets 00-20 and 7F-FF hexadecimal are not used.
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* See “Excluded US-ASCII Characters” in RFC 2936.
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*
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*/
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static inline bool esp_eddystone_is_char_invalid(int ch)
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{
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return (ch >= 0x00 && ch <= 0x20) || (ch >= 0x7f && ch <= 0xff);
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}
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#endif /* __ESP_EDDYSTONE_PROTOCOL_H__ */
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