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/**************************************************************************/
/*!
@file BLECharacteristic.h
@author hathach (tinyusb.org)
@section LICENSE
Software License Agreement (BSD License)
Copyright (c) 2018, Adafruit Industries (adafruit.com)
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
3. Neither the name of the copyright holders nor the
names of its contributors may be used to endorse or promote products
derived from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/**************************************************************************/
#ifndef BLECHARACTERISTIC_H_
#define BLECHARACTERISTIC_H_
#include "bluefruit_common.h"
#include "BLEUuid.h"
// Forward declaration
class AdafruitBluefruit;
class BLEService;
enum BleSecurityMode
{
SECMODE_NO_ACCESS = 0x00,
SECMODE_OPEN = 0x11,
SECMODE_ENC_NO_MITM = 0x21,
SECMODE_ENC_WITH_MITM = 0x31,
SECMODE_SIGNED_NO_MITM = 0x12,
SECMODE_SIGNED_WITH_MITM = 0x22
};
#define BLE_SECMODE_NO_ACCESS ((ble_gap_conn_sec_mode_t) { .sm = 0, .lv = 0 })
#define BLE_SECMODE_OPEN ((ble_gap_conn_sec_mode_t) { .sm = 1, .lv = 1 })
#define BLE_SECMODE_ENC_NO_MITM ((ble_gap_conn_sec_mode_t) { .sm = 1, .lv = 2 })
#define BLE_SECMODE_ENC_WITH_MITM ((ble_gap_conn_sec_mode_t) { .sm = 1, .lv = 3 })
#define BLE_SECMODE_SIGNED_NO_MITM ((ble_gap_conn_sec_mode_t) { .sm = 2, .lv = 1 })
#define BLE_SECMODE_SIGNED_WITH_MITM ((ble_gap_conn_sec_mode_t) { .sm = 2, .lv = 2 })
enum CharsProperties
{
CHR_PROPS_BROADCAST = bit(0),
CHR_PROPS_READ = bit(1),
CHR_PROPS_WRITE_WO_RESP = bit(2),
CHR_PROPS_WRITE = bit(3),
CHR_PROPS_NOTIFY = bit(4),
CHR_PROPS_INDICATE = bit(5)
};
class BLECharacteristic
{
public:
/*--------- Callback Signatures ----------*/
typedef void (*read_authorize_cb_t) (BLECharacteristic& chr, ble_gatts_evt_read_t * request);
typedef void (*write_authorize_cb_t) (BLECharacteristic& chr, ble_gatts_evt_write_t* request);
typedef void (*write_cb_t) (BLECharacteristic& chr, uint8_t* data, uint16_t len, uint16_t offset);
typedef void (*write_cccd_cb_t) (BLECharacteristic& chr, uint16_t value);
BLEUuid uuid;
// Constructors
BLECharacteristic(void);
BLECharacteristic(BLEUuid bleuuid);
// Destructor
virtual ~BLECharacteristic();
BLEService& parentService(void);
void setTempMemory(void);
/*------------- Configure -------------*/
void setUuid(BLEUuid bleuuid);
void setProperties(uint8_t prop);
void setPermission(BleSecurityMode read_perm, BleSecurityMode write_perm);
void setMaxLen(uint16_t max_len);
void setFixedLen(uint16_t fixed_len);
/*------------- Descriptors -------------*/
void setUserDescriptor(const char* descriptor); // aka user descriptor
void setReportRefDescriptor(uint8_t id, uint8_t type); // TODO refactor to use addDescriptor()
void setPresentationFormatDescriptor(uint8_t type, int8_t exponent, uint16_t unit, uint8_t name_space = 1, uint16_t descritpor = 0);
/*------------- Callbacks -------------*/
void setWriteCallback (write_cb_t fp);
void setCccdWriteCallback (write_cccd_cb_t fp);
void setReadAuthorizeCallback(read_authorize_cb_t fp);
void setWriteAuthorizeCallback(write_authorize_cb_t fp);
virtual err_t begin(void);
// Add Descriptor function must be called right after begin()
err_t addDescriptor(BLEUuid bleuuid, void const * content, uint16_t len, BleSecurityMode read_perm = SECMODE_OPEN, BleSecurityMode write_perm = SECMODE_NO_ACCESS);
ble_gatts_char_handles_t handles(void);
/*------------- Write -------------*/
uint16_t write(const void* data, uint16_t len);
uint16_t write(const char* str);
uint16_t write8 (uint8_t num);
uint16_t write16 (uint16_t num);
uint16_t write32 (uint32_t num);
uint16_t write32 (int num);
/*------------- Read -------------*/
uint16_t read(void* buffer, uint16_t bufsize, uint16_t offset = 0);
uint8_t read8 (void);
uint16_t read16(void);
uint32_t read32(void);
/*------------- Notify -------------*/
uint16_t getCccd(void);
bool notifyEnabled(void);
bool notify(const void* data, uint16_t len);
bool notify(const char* str);
bool notify8 (uint8_t num);
bool notify16 (uint16_t num);
bool notify32 (uint32_t num);
bool notify32 (int num);
/*------------- Indicate -------------*/
bool indicateEnabled(void);
bool indicate(const void* data, uint16_t len);
bool indicate(const char* str);
bool indicate8 (uint8_t num);
bool indicate16 (uint16_t num);
bool indicate32 (uint32_t num);
bool indicate32 (int num);
/*------------- Internal Functions -------------*/
virtual void _eventHandler(ble_evt_t* event);
protected:
bool _is_temp;
uint16_t _max_len;
BLEService* _service; // pointer to parent's service
/*------------- Descriptors -------------*/
const char* _usr_descriptor;
struct ATTR_PACKED {
uint8_t id;
uint8_t type;
}_report_ref_desc;
ble_gatts_char_pf_t _format_desc;
ble_gatt_char_props_t _properties;
ble_gatts_attr_md_t _attr_meta;
ble_gatts_char_handles_t _handles;
struct {
uint8_t* buffer;
uint16_t bufsize;
uint16_t count;
}_long_wr;
/*------------- Callback pointers -------------*/
read_authorize_cb_t _rd_authorize_cb;
write_authorize_cb_t _wr_authorize_cb;
write_cb_t _wr_cb;
write_cccd_cb_t _cccd_wr_cb;
/*------------- Internal Functions -------------*/
void _init(void);
};
#endif /* BLECHARACTERISTIC_H_ */
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