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