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 MATTHIAS 24 * RINGWALD 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 * Common code to access UART via asynchronous block read/write commands on top of hal_uart_dma.h 44 * 45 */ 46 47 #include "btstack_debug.h" 48 #include "btstack_uart_block.h" 49 #include "btstack_run_loop_embedded.h" 50 #include "hal_uart_dma.h" 51 52 // uart config 53 static const btstack_uart_config_t * uart_config; 54 55 // data source for integration with BTstack Runloop 56 static btstack_data_source_t transport_data_source; 57 58 static int send_complete; 59 static int receive_complete; 60 static int wakeup_event; 61 62 // callbacks 63 static void (*block_sent)(void); 64 static void (*block_received)(void); 65 static void (*wakeup_handler)(void); 66 67 68 static void btstack_uart_block_received(void){ 69 receive_complete = 1; 70 btstack_run_loop_embedded_trigger(); 71 } 72 73 static void btstack_uart_block_sent(void){ 74 send_complete = 1; 75 btstack_run_loop_embedded_trigger(); 76 } 77 78 static void btstack_uart_cts_pulse(void){ 79 wakeup_event = 1; 80 btstack_run_loop_embedded_trigger(); 81 } 82 83 static int btstack_uart_embedded_init(const btstack_uart_config_t * config){ 84 uart_config = config; 85 hal_uart_dma_set_block_received(&btstack_uart_block_received); 86 hal_uart_dma_set_block_sent(&btstack_uart_block_sent); 87 return 0; 88 } 89 90 static void btstack_uart_embedded_process(btstack_data_source_t *ds, btstack_data_source_callback_type_t callback_type) { 91 switch (callback_type){ 92 case DATA_SOURCE_CALLBACK_POLL: 93 if (send_complete){ 94 send_complete = 0; 95 if (block_sent){ 96 block_sent(); 97 } 98 } 99 if (receive_complete){ 100 receive_complete = 0; 101 if (block_received){ 102 block_received(); 103 } 104 } 105 if (wakeup_event){ 106 wakeup_event = 0; 107 if (wakeup_handler){ 108 wakeup_handler(); 109 } 110 } 111 break; 112 default: 113 break; 114 } 115 } 116 117 static int btstack_uart_embedded_open(void){ 118 hal_uart_dma_init(); 119 hal_uart_dma_set_baud(uart_config->baudrate); 120 121 // set up polling data_source 122 btstack_run_loop_set_data_source_handler(&transport_data_source, &btstack_uart_embedded_process); 123 btstack_run_loop_enable_data_source_callbacks(&transport_data_source, DATA_SOURCE_CALLBACK_POLL); 124 btstack_run_loop_add_data_source(&transport_data_source); 125 return 0; 126 } 127 128 static int btstack_uart_embedded_close(void){ 129 130 // remove data source 131 btstack_run_loop_disable_data_source_callbacks(&transport_data_source, DATA_SOURCE_CALLBACK_POLL); 132 btstack_run_loop_remove_data_source(&transport_data_source); 133 134 // close device 135 // ... 136 return 0; 137 } 138 139 static void btstack_uart_embedded_set_block_received( void (*block_handler)(void)){ 140 block_received = block_handler; 141 } 142 143 static void btstack_uart_embedded_set_block_sent( void (*block_handler)(void)){ 144 block_sent = block_handler; 145 } 146 147 static void btstack_uart_embedded_set_wakeup_handler( void (*the_wakeup_handler)(void)){ 148 wakeup_handler = the_wakeup_handler; 149 } 150 151 static int btstack_uart_embedded_set_parity(int parity){ 152 return 0; 153 } 154 155 static void btstack_uart_embedded_send_block(const uint8_t *data, uint16_t size){ 156 hal_uart_dma_send_block(data, size); 157 } 158 159 static void btstack_uart_embedded_receive_block(uint8_t *buffer, uint16_t len){ 160 hal_uart_dma_receive_block(buffer, len); 161 } 162 163 static int btstack_uart_embedded_get_supported_sleep_modes(void){ 164 #ifdef HAVE_HAL_UART_DMA_SLEEP_MODES 165 return hal_uart_dma_get_supported_sleep_modes(); 166 #else 167 return BTSTACK_UART_SLEEP_MASK_RTS_HIGH_WAKE_ON_CTS_PULSE; 168 #endif 169 } 170 171 static void btstack_uart_embedded_set_sleep(btstack_uart_sleep_mode_t sleep_mode){ 172 log_info("set sleep %u", sleep_mode); 173 if (sleep_mode == BTSTACK_UART_SLEEP_RTS_HIGH_WAKE_ON_CTS_PULSE){ 174 hal_uart_dma_set_csr_irq_handler(&btstack_uart_cts_pulse); 175 } else { 176 hal_uart_dma_set_csr_irq_handler(NULL); 177 } 178 179 #ifdef HAVE_HAL_UART_DMA_SLEEP_MODES 180 hal_uart_dma_set_sleep_mode(sleep_mode); 181 #else 182 hal_uart_dma_set_sleep(sleep_mode != BTSTACK_UART_SLEEP_OFF); 183 #endif 184 log_info("done"); 185 } 186 187 static const btstack_uart_block_t btstack_uart_embedded = { 188 /* int (*init)(hci_transport_config_uart_t * config); */ &btstack_uart_embedded_init, 189 /* int (*open)(void); */ &btstack_uart_embedded_open, 190 /* int (*close)(void); */ &btstack_uart_embedded_close, 191 /* void (*set_block_received)(void (*handler)(void)); */ &btstack_uart_embedded_set_block_received, 192 /* void (*set_block_sent)(void (*handler)(void)); */ &btstack_uart_embedded_set_block_sent, 193 /* int (*set_baudrate)(uint32_t baudrate); */ &hal_uart_dma_set_baud, 194 /* int (*set_parity)(int parity); */ &btstack_uart_embedded_set_parity, 195 #ifdef HAVE_UART_DMA_SET_FLOWCONTROL 196 /* int (*set_flowcontrol)(int flowcontrol); */ &hal_uart_dma_set_flowcontrol, 197 #else 198 /* int (*set_flowcontrol)(int flowcontrol); */ NULL, 199 #endif 200 /* void (*receive_block)(uint8_t *buffer, uint16_t len); */ &btstack_uart_embedded_receive_block, 201 /* void (*send_block)(const uint8_t *buffer, uint16_t length); */ &btstack_uart_embedded_send_block, 202 /* int (*get_supported_sleep_modes); */ &btstack_uart_embedded_get_supported_sleep_modes, 203 /* void (*set_sleep)(btstack_uart_sleep_mode_t sleep_mode); */ &btstack_uart_embedded_set_sleep, 204 /* void (*set_wakeup_handler)(void (*handler)(void)); */ &btstack_uart_embedded_set_wakeup_handler, 205 NULL, NULL, NULL, NULL, 206 }; 207 208 const btstack_uart_block_t * btstack_uart_block_embedded_instance(void){ 209 return &btstack_uart_embedded; 210 } 211