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_embedded.c" 39 40 /* 41 * btstack_uart_block_embedded.c 42 * 43 * Adapter to IRQ-driven hal_uart_dma.h with Embedded 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 #include "btstack_debug.h" 48 #include "btstack_uart_block.h" 49 #include "btstack_run_loop.h" 50 #include "hal_uart_dma.h" 51 52 // NULL 53 #include <stddef.h> 54 55 // uart config 56 static const btstack_uart_config_t * btstack_uart_block_configuration; 57 58 // data source for integration with BTstack Runloop 59 static btstack_data_source_t transport_data_source; 60 61 static int send_complete; 62 static int receive_complete; 63 static int wakeup_event; 64 65 // callbacks 66 static void (*block_sent)(void); 67 static void (*block_received)(void); 68 static void (*wakeup_handler)(void); 69 70 71 static void btstack_uart_block_received(void){ 72 receive_complete = 1; 73 btstack_run_loop_poll_data_sources_from_irq(); 74 } 75 76 static void btstack_uart_block_sent(void){ 77 send_complete = 1; 78 btstack_run_loop_poll_data_sources_from_irq(); 79 } 80 81 static void btstack_uart_cts_pulse(void){ 82 wakeup_event = 1; 83 btstack_run_loop_poll_data_sources_from_irq(); 84 } 85 86 static int btstack_uart_embedded_init(const btstack_uart_config_t * config){ 87 btstack_uart_block_configuration = config; 88 hal_uart_dma_set_block_received(&btstack_uart_block_received); 89 hal_uart_dma_set_block_sent(&btstack_uart_block_sent); 90 return 0; 91 } 92 93 static void btstack_uart_embedded_process(btstack_data_source_t *ds, btstack_data_source_callback_type_t callback_type) { 94 UNUSED(ds); 95 switch (callback_type){ 96 case DATA_SOURCE_CALLBACK_POLL: 97 if (send_complete){ 98 send_complete = 0; 99 if (block_sent){ 100 block_sent(); 101 } 102 } 103 if (receive_complete){ 104 receive_complete = 0; 105 if (block_received){ 106 block_received(); 107 } 108 } 109 if (wakeup_event){ 110 wakeup_event = 0; 111 if (wakeup_handler){ 112 wakeup_handler(); 113 } 114 } 115 break; 116 default: 117 break; 118 } 119 } 120 121 static int btstack_uart_embedded_open(void){ 122 hal_uart_dma_init(); 123 hal_uart_dma_set_baud(btstack_uart_block_configuration->baudrate); 124 125 // set up polling data_source 126 btstack_run_loop_set_data_source_handler(&transport_data_source, &btstack_uart_embedded_process); 127 btstack_run_loop_enable_data_source_callbacks(&transport_data_source, DATA_SOURCE_CALLBACK_POLL); 128 btstack_run_loop_add_data_source(&transport_data_source); 129 return 0; 130 } 131 132 static int btstack_uart_embedded_close(void){ 133 134 // remove data source 135 btstack_run_loop_disable_data_source_callbacks(&transport_data_source, DATA_SOURCE_CALLBACK_POLL); 136 btstack_run_loop_remove_data_source(&transport_data_source); 137 138 // close device 139 // ... 140 return 0; 141 } 142 143 static void btstack_uart_embedded_set_block_received( void (*block_handler)(void)){ 144 block_received = block_handler; 145 } 146 147 static void btstack_uart_embedded_set_block_sent( void (*block_handler)(void)){ 148 block_sent = block_handler; 149 } 150 151 static void btstack_uart_embedded_set_wakeup_handler( void (*the_wakeup_handler)(void)){ 152 wakeup_handler = the_wakeup_handler; 153 } 154 155 static int btstack_uart_embedded_set_parity(int parity){ 156 UNUSED(parity); 157 return 0; 158 } 159 160 static void btstack_uart_embedded_send_block(const uint8_t *data, uint16_t size){ 161 hal_uart_dma_send_block(data, size); 162 } 163 164 static void btstack_uart_embedded_receive_block(uint8_t *buffer, uint16_t len){ 165 hal_uart_dma_receive_block(buffer, len); 166 } 167 168 static int btstack_uart_embedded_get_supported_sleep_modes(void){ 169 #ifdef HAVE_HAL_UART_DMA_SLEEP_MODES 170 return hal_uart_dma_get_supported_sleep_modes(); 171 #else 172 return BTSTACK_UART_SLEEP_MASK_RTS_HIGH_WAKE_ON_CTS_PULSE; 173 #endif 174 } 175 176 static void btstack_uart_embedded_set_sleep(btstack_uart_sleep_mode_t sleep_mode){ 177 log_info("set sleep %u", sleep_mode); 178 if (sleep_mode == BTSTACK_UART_SLEEP_RTS_HIGH_WAKE_ON_CTS_PULSE){ 179 hal_uart_dma_set_csr_irq_handler(&btstack_uart_cts_pulse); 180 } else { 181 hal_uart_dma_set_csr_irq_handler(NULL); 182 } 183 184 #ifdef HAVE_HAL_UART_DMA_SLEEP_MODES 185 hal_uart_dma_set_sleep_mode(sleep_mode); 186 #else 187 hal_uart_dma_set_sleep(sleep_mode != BTSTACK_UART_SLEEP_OFF); 188 #endif 189 log_info("done"); 190 } 191 192 static const btstack_uart_block_t btstack_uart_embedded = { 193 /* int (*init)(hci_transport_config_uart_t * config); */ &btstack_uart_embedded_init, 194 /* int (*open)(void); */ &btstack_uart_embedded_open, 195 /* int (*close)(void); */ &btstack_uart_embedded_close, 196 /* void (*set_block_received)(void (*handler)(void)); */ &btstack_uart_embedded_set_block_received, 197 /* void (*set_block_sent)(void (*handler)(void)); */ &btstack_uart_embedded_set_block_sent, 198 /* int (*set_baudrate)(uint32_t baudrate); */ &hal_uart_dma_set_baud, 199 /* int (*set_parity)(int parity); */ &btstack_uart_embedded_set_parity, 200 #ifdef HAVE_UART_DMA_SET_FLOWCONTROL 201 /* int (*set_flowcontrol)(int flowcontrol); */ &hal_uart_dma_set_flowcontrol, 202 #else 203 /* int (*set_flowcontrol)(int flowcontrol); */ NULL, 204 #endif 205 /* void (*receive_block)(uint8_t *buffer, uint16_t len); */ &btstack_uart_embedded_receive_block, 206 /* void (*send_block)(const uint8_t *buffer, uint16_t length); */ &btstack_uart_embedded_send_block, 207 /* int (*get_supported_sleep_modes); */ &btstack_uart_embedded_get_supported_sleep_modes, 208 /* void (*set_sleep)(btstack_uart_sleep_mode_t sleep_mode); */ &btstack_uart_embedded_set_sleep, 209 /* void (*set_wakeup_handler)(void (*handler)(void)); */ &btstack_uart_embedded_set_wakeup_handler, 210 NULL, NULL, NULL, NULL, 211 }; 212 213 const btstack_uart_block_t * btstack_uart_block_embedded_instance(void){ 214 return &btstack_uart_embedded; 215 } 216