1 /*
2 * Copyright (C) 2017 BlueKitchen GmbH
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the copyright holders nor the names of
14 * contributors may be used to endorse or promote products derived
15 * from this software without specific prior written permission.
16 * 4. Any redistribution, use, or modification is done solely for
17 * personal benefit and not for any commercial purpose or for
18 * monetary gain.
19 *
20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS
21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL BLUEKITCHEN
24 * GMBH OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * Please inquire about commercial licensing options at
34 * [email protected]
35 *
36 */
37
38 #define BTSTACK_FILE__ "btstack_stdin_embedded.c"
39
40 /*
41 * btstack_stdin_embedded.c
42 *
43 * Common code to provide console input using an IRQ-driven console UART in hal_stdin.h
44 *
45 */
46
47 #include "btstack_config.h"
48
49 #include "btstack_stdin.h"
50 #include "btstack_run_loop.h"
51 #include "btstack_run_loop_embedded.h"
52
53 #ifdef ENABLE_SEGGER_RTT
54 #include "SEGGER_RTT.h"
55 #else
56 #include "hal_stdin.h"
57 #endif
58
59 static void (*stdin_handler)(char c);
60
61 #ifdef ENABLE_SEGGER_RTT
62
63 #define RTT_POLL_INTERVAL_MS 50
64
65 static btstack_timer_source_t stdin_timer_source;
66
btstack_stdin_timer_handler(btstack_timer_source_t * ts)67 static void btstack_stdin_timer_handler(btstack_timer_source_t *ts){
68 if (SEGGER_RTT_HasKey()){
69 int stdin_character = SEGGER_RTT_GetKey();
70 (*stdin_handler)((uint8_t)stdin_character);
71 }
72 btstack_run_loop_set_timer(ts, RTT_POLL_INTERVAL_MS);
73 btstack_run_loop_add_timer(ts);
74 }
75
76 #else
77
78 static btstack_data_source_t stdin_data_source;
79
80 // callback from hal_stdin is from irq context
81
82 volatile int stdin_character_received;
83 volatile char stdin_character;
84
btstack_stdin_handler(char c)85 static void btstack_stdin_handler(char c){
86 stdin_character = c;
87 stdin_character_received = 1;
88 btstack_run_loop_poll_data_sources_from_irq();
89 }
90
btstack_stdin_process(struct btstack_data_source * ds,btstack_data_source_callback_type_t callback_type)91 static void btstack_stdin_process(struct btstack_data_source *ds, btstack_data_source_callback_type_t callback_type){
92 UNUSED(ds);
93 UNUSED(callback_type);
94 if (!stdin_character_received) {
95 return;
96 }
97 (*stdin_handler)(stdin_character);
98 stdin_character_received = 0;
99 }
100
101 #endif
102
btstack_stdin_setup(void (* handler)(char c))103 void btstack_stdin_setup(void (*handler)(char c)){
104 // set handler
105 stdin_handler = handler;
106
107 #ifdef ENABLE_SEGGER_RTT
108 // start polling with timer
109 btstack_run_loop_set_timer_handler(&stdin_timer_source, &btstack_stdin_timer_handler);
110 btstack_run_loop_set_timer(&stdin_timer_source, RTT_POLL_INTERVAL_MS);
111 btstack_run_loop_add_timer(&stdin_timer_source);
112 #else
113 // set up polling data_source
114 btstack_run_loop_set_data_source_handler(&stdin_data_source, &btstack_stdin_process);
115 btstack_run_loop_enable_data_source_callbacks(&stdin_data_source, DATA_SOURCE_CALLBACK_POLL);
116 btstack_run_loop_add_data_source(&stdin_data_source);
117
118 // start receiving via hal_stdin.h
119 hal_stdin_setup(&btstack_stdin_handler);
120 #endif
121 }
122