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_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 and 44 * Callbacks are executed on main thread via data source and btstack_run_loop_freertos_trigger_from_isr 45 * 46 */ 47 48 #include "btstack_debug.h" 49 #include "btstack_uart_block.h" 50 #include "btstack_run_loop_freertos.h" 51 #include "hal_uart_dma.h" 52 53 // hack to avoid error for ESP32 54 #ifndef ESP_PLATFORM 55 56 #if (INCLUDE_xEventGroupSetBitFromISR != 1) && !defined(HAVE_FREERTOS_TASK_NOTIFICATIONS) 57 #error "The BTstack HAL UART Run Loop integration (btstack_uart_block_freertos) needs to trigger Run Loop iterations from ISR context," \ 58 "but 'INCLUDE_xEventGroupSetBitFromISR' is not enabled in your FreeRTOS configuration. Please enable INCLUDE_xEventGroupSetBitFromISR." 59 #endif 60 61 // uart config 62 static const btstack_uart_config_t * uart_config; 63 64 // data source for integration with BTstack Runloop 65 static btstack_data_source_t transport_data_source; 66 67 // callbacks 68 static void (*block_sent)(void); 69 static void (*block_received)(void); 70 71 static int send_complete; 72 static int receive_complete; 73 74 static void btstack_uart_block_freertos_received_isr(void){ 75 receive_complete = 1; 76 btstack_run_loop_freertos_trigger_from_isr(); 77 } 78 79 static void btstack_uart_block_freertos_sent_isr(void){ 80 send_complete = 1; 81 btstack_run_loop_freertos_trigger_from_isr(); 82 } 83 84 static void btstack_uart_block_freertos_process(btstack_data_source_t *ds, btstack_data_source_callback_type_t callback_type) { 85 switch (callback_type){ 86 case DATA_SOURCE_CALLBACK_POLL: 87 if (send_complete){ 88 send_complete = 0; 89 if (block_sent){ 90 block_sent(); 91 } 92 } 93 if (receive_complete){ 94 receive_complete = 0; 95 if (block_received){ 96 block_received(); 97 } 98 } 99 break; 100 default: 101 break; 102 } 103 } 104 105 // 106 static int btstack_uart_block_freertos_init(const btstack_uart_config_t * config){ 107 uart_config = config; 108 hal_uart_dma_set_block_received(&btstack_uart_block_freertos_received_isr); 109 hal_uart_dma_set_block_sent(&btstack_uart_block_freertos_sent_isr); 110 111 // set up polling data_source 112 btstack_run_loop_set_data_source_handler(&transport_data_source, &btstack_uart_block_freertos_process); 113 btstack_run_loop_enable_data_source_callbacks(&transport_data_source, DATA_SOURCE_CALLBACK_POLL); 114 btstack_run_loop_add_data_source(&transport_data_source); 115 return 0; 116 } 117 118 static int btstack_uart_block_freertos_open(void){ 119 hal_uart_dma_init(); 120 hal_uart_dma_set_baud(uart_config->baudrate); 121 return 0; 122 } 123 124 static int btstack_uart_block_freertos_close(void){ 125 126 // close device 127 // ... 128 return 0; 129 } 130 131 static void btstack_uart_block_freertos_set_block_received( void (*block_handler)(void)){ 132 block_received = block_handler; 133 } 134 135 static void btstack_uart_block_freertos_set_block_sent( void (*block_handler)(void)){ 136 block_sent = block_handler; 137 } 138 139 static int btstack_uart_block_freertos_set_parity(int parity){ 140 return 0; 141 } 142 143 // static void btstack_uart_block_set_sleep(uint8_t sleep){ 144 // } 145 146 // static void btstack_uart_block_freertos_set_csr_irq_handler( void (*csr_irq_handler)(void)){ 147 // } 148 149 static const btstack_uart_block_t btstack_uart_block_freertos = { 150 /* int (*init)(hci_transport_config_uart_t * config); */ &btstack_uart_block_freertos_init, 151 /* int (*open)(void); */ &btstack_uart_block_freertos_open, 152 /* int (*close)(void); */ &btstack_uart_block_freertos_close, 153 /* void (*set_block_received)(void (*handler)(void)); */ &btstack_uart_block_freertos_set_block_received, 154 /* void (*set_block_sent)(void (*handler)(void)); */ &btstack_uart_block_freertos_set_block_sent, 155 /* int (*set_baudrate)(uint32_t baudrate); */ &hal_uart_dma_set_baud, 156 /* int (*set_parity)(int parity); */ &btstack_uart_block_freertos_set_parity, 157 /* void (*receive_block)(uint8_t *buffer, uint16_t len); */ &hal_uart_dma_receive_block, 158 /* void (*send_block)(const uint8_t *buffer, uint16_t length); */ &hal_uart_dma_send_block, 159 /* int (*get_supported_sleep_modes); */ NULL, 160 /* void (*set_sleep)(btstack_uart_sleep_mode_t sleep_mode); */ NULL, 161 /* void (*set_wakeup_handler)(void (*wakeup_handler)(void)); */ NULL, 162 }; 163 164 const btstack_uart_block_t * btstack_uart_block_freertos_instance(void){ 165 return &btstack_uart_block_freertos; 166 } 167 168 // end of hack to avoid error for ESP32 169 #endif // ESP_PLATFORM 170