1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
|
/**************************************************************************/
/*!
@file BLEUart.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 BLEUART_H_
#define BLEUART_H_
#include "bluefruit_common.h"
#include "utility/adafruit_fifo.h"
#include "BLECharacteristic.h"
#include "BLEService.h"
#define BLE_UART_DEFAULT_FIFO_DEPTH 256
extern const uint8_t BLEUART_UUID_SERVICE[];
extern const uint8_t BLEUART_UUID_CHR_RXD[];
extern const uint8_t BLEUART_UUID_CHR_TXD[];
class BLEUart : public BLEService, public Stream
{
public:
typedef void (*rx_callback_t) (void);
BLEUart(uint16_t fifo_depth = BLE_UART_DEFAULT_FIFO_DEPTH);
virtual ~BLEUart();
virtual err_t begin(void);
bool notifyEnabled (void);
void setRxCallback (rx_callback_t fp);
void bufferTXD (uint8_t enable);
// Stream API
virtual int read ( void );
virtual int read ( uint8_t * buf, size_t size );
int read ( char * buf, size_t size ) { return read( (uint8_t*) buf, size); }
virtual size_t write ( uint8_t b );
virtual size_t write ( const uint8_t *content, size_t len );
virtual int available ( void );
virtual int peek ( void );
virtual void flush ( void );
// pull in write(str) and write(buf, size) from Print
using Print::write;
protected:
BLECharacteristic _txd;
BLECharacteristic _rxd;
// RXD
Adafruit_FIFO* _rx_fifo;
uint16_t _rx_fifo_depth;
rx_callback_t _rx_cb;
// TXD
Adafruit_FIFO* _tx_fifo;
uint8_t _tx_buffered;
TimerHandle_t _buffered_th;
bool flush_tx_buffered(void);
// from BLEService
virtual void _disconnect_cb(void);
virtual void _connect_cb(void);
friend void bleuart_rxd_cb(BLECharacteristic& chr, uint8_t* data, uint16_t len, uint16_t offset);
friend void bleuart_txd_cccd_cb(BLECharacteristic& chr, uint16_t value);
friend void bleuart_txd_buffered_hdlr(TimerHandle_t timer);
};
#endif /* BLEUART_H_ */
|
