1 /*
2 * Copyright (C) 2016 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_uart_block_freertos.c"
39
40 /*
41 * btstack_uart_block_freertos.c
42 *
43 * Adapter to IRQ-driven hal_uart_dma.h with FreeRTOS BTstack Run Loop
44 * Callbacks are executed on main thread via data source and btstack_run_loop_poll_data_sources_from_irq
45 *
46 */
47
48 #include "btstack_debug.h"
49 #include "btstack_uart_block.h"
50 #include "btstack_run_loop.h"
51 #include "hal_uart_dma.h"
52
53 #ifdef HAVE_FREERTOS_INCLUDE_PREFIX
54 #include "freertos/FreeRTOS.h"
55 #else
56 #include "FreeRTOS.h"
57 #endif
58
59 // uart config
60 static const btstack_uart_config_t * uart_config;
61
62 // data source for integration with BTstack Runloop
63 static btstack_data_source_t transport_data_source;
64
65 // callbacks
66 static void (*block_sent)(void);
67 static void (*block_received)(void);
68
69 static int send_complete;
70 static int receive_complete;
71
btstack_uart_block_freertos_received_isr(void)72 static void btstack_uart_block_freertos_received_isr(void){
73 receive_complete = 1;
74 btstack_run_loop_poll_data_sources_from_irq();
75 }
76
btstack_uart_block_freertos_sent_isr(void)77 static void btstack_uart_block_freertos_sent_isr(void){
78 send_complete = 1;
79 btstack_run_loop_poll_data_sources_from_irq();
80 }
81
btstack_uart_block_freertos_process(btstack_data_source_t * ds,btstack_data_source_callback_type_t callback_type)82 static void btstack_uart_block_freertos_process(btstack_data_source_t *ds, btstack_data_source_callback_type_t callback_type) {
83 switch (callback_type){
84 case DATA_SOURCE_CALLBACK_POLL:
85 if (send_complete){
86 send_complete = 0;
87 if (block_sent){
88 block_sent();
89 }
90 }
91 if (receive_complete){
92 receive_complete = 0;
93 if (block_received){
94 block_received();
95 }
96 }
97 break;
98 default:
99 break;
100 }
101 }
102
103 //
btstack_uart_block_freertos_init(const btstack_uart_config_t * config)104 static int btstack_uart_block_freertos_init(const btstack_uart_config_t * config){
105 uart_config = config;
106 hal_uart_dma_set_block_received(&btstack_uart_block_freertos_received_isr);
107 hal_uart_dma_set_block_sent(&btstack_uart_block_freertos_sent_isr);
108
109 // set up polling data_source
110 btstack_run_loop_set_data_source_handler(&transport_data_source, &btstack_uart_block_freertos_process);
111 btstack_run_loop_enable_data_source_callbacks(&transport_data_source, DATA_SOURCE_CALLBACK_POLL);
112 btstack_run_loop_add_data_source(&transport_data_source);
113 return 0;
114 }
115
btstack_uart_block_freertos_open(void)116 static int btstack_uart_block_freertos_open(void){
117 hal_uart_dma_init();
118 hal_uart_dma_set_baud(uart_config->baudrate);
119 return 0;
120 }
121
btstack_uart_block_freertos_close(void)122 static int btstack_uart_block_freertos_close(void){
123
124 // close device
125 // ...
126 return 0;
127 }
128
btstack_uart_block_freertos_set_block_received(void (* block_handler)(void))129 static void btstack_uart_block_freertos_set_block_received( void (*block_handler)(void)){
130 block_received = block_handler;
131 }
132
btstack_uart_block_freertos_set_block_sent(void (* block_handler)(void))133 static void btstack_uart_block_freertos_set_block_sent( void (*block_handler)(void)){
134 block_sent = block_handler;
135 }
136
btstack_uart_block_freertos_set_parity(int parity)137 static int btstack_uart_block_freertos_set_parity(int parity){
138 return 0;
139 }
140
141 // static void btstack_uart_block_set_sleep(uint8_t sleep){
142 // }
143
144 // static void btstack_uart_block_freertos_set_csr_irq_handler( void (*csr_irq_handler)(void)){
145 // }
146
147 static const btstack_uart_block_t btstack_uart_block_freertos = {
148 /* int (*init)(hci_transport_config_uart_t * config); */ &btstack_uart_block_freertos_init,
149 /* int (*open)(void); */ &btstack_uart_block_freertos_open,
150 /* int (*close)(void); */ &btstack_uart_block_freertos_close,
151 /* void (*set_block_received)(void (*handler)(void)); */ &btstack_uart_block_freertos_set_block_received,
152 /* void (*set_block_sent)(void (*handler)(void)); */ &btstack_uart_block_freertos_set_block_sent,
153 /* int (*set_baudrate)(uint32_t baudrate); */ &hal_uart_dma_set_baud,
154 /* int (*set_parity)(int parity); */ &btstack_uart_block_freertos_set_parity,
155 #ifdef HAVE_UART_DMA_SET_FLOWCONTROL
156 /* int (*set_flowcontrol)(int flowcontrol); */ &hal_uart_dma_set_flowcontrol,
157 #else
158 /* int (*set_flowcontrol)(int flowcontrol); */ NULL,
159 #endif
160 /* void (*receive_block)(uint8_t *buffer, uint16_t len); */ &hal_uart_dma_receive_block,
161 /* void (*send_block)(const uint8_t *buffer, uint16_t length); */ &hal_uart_dma_send_block,
162 /* int (*get_supported_sleep_modes); */ NULL,
163 /* void (*set_sleep)(btstack_uart_sleep_mode_t sleep_mode); */ NULL,
164 /* void (*set_wakeup_handler)(void (*wakeup_handler)(void)); */ NULL,
165 NULL, NULL, NULL, NULL,
166 };
167
btstack_uart_block_freertos_instance(void)168 const btstack_uart_block_t * btstack_uart_block_freertos_instance(void){
169 return &btstack_uart_block_freertos;
170 }
171