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 // uart config 54 static const btstack_uart_config_t * uart_config; 55 56 // data source for integration with BTstack Runloop 57 static btstack_data_source_t transport_data_source; 58 59 // callbacks 60 static void (*block_sent)(void); 61 static void (*block_received)(void); 62 63 static int send_complete; 64 static int receive_complete; 65 66 static void btstack_uart_block_freertos_received_isr(void){ 67 receive_complete = 1; 68 btstack_run_loop_freertos_trigger_from_isr(); 69 } 70 71 static void btstack_uart_block_freertos_sent_isr(void){ 72 send_complete = 1; 73 btstack_run_loop_freertos_trigger_from_isr(); 74 } 75 76 static void btstack_uart_block_freertos_process(btstack_data_source_t *ds, btstack_data_source_callback_type_t callback_type) { 77 switch (callback_type){ 78 case DATA_SOURCE_CALLBACK_POLL: 79 if (send_complete){ 80 send_complete = 0; 81 block_sent(); 82 } 83 if (receive_complete){ 84 receive_complete = 0; 85 block_received(); 86 } 87 break; 88 default: 89 break; 90 } 91 } 92 93 // 94 static int btstack_uart_block_freertos_init(const btstack_uart_config_t * config){ 95 uart_config = config; 96 hal_uart_dma_set_block_received(&btstack_uart_block_freertos_received_isr); 97 hal_uart_dma_set_block_sent(&btstack_uart_block_freertos_sent_isr); 98 99 // set up polling data_source 100 btstack_run_loop_set_data_source_handler(&transport_data_source, &btstack_uart_block_freertos_process); 101 btstack_run_loop_enable_data_source_callbacks(&transport_data_source, DATA_SOURCE_CALLBACK_POLL); 102 btstack_run_loop_add_data_source(&transport_data_source); 103 return 0; 104 } 105 106 static int btstack_uart_block_freertos_open(void){ 107 hal_uart_dma_init(); 108 hal_uart_dma_set_baud(uart_config->baudrate); 109 return 0; 110 } 111 112 static int btstack_uart_block_freertos_close(void){ 113 114 // close device 115 // ... 116 return 0; 117 } 118 119 static void btstack_uart_block_freertos_set_block_received( void (*block_handler)(void)){ 120 block_received = block_handler; 121 } 122 123 static void btstack_uart_block_freertos_set_block_sent( void (*block_handler)(void)){ 124 block_sent = block_handler; 125 } 126 127 static int btstack_uart_block_freertos_set_parity(int parity){ 128 return 0; 129 } 130 131 // static void btstack_uart_block_set_sleep(uint8_t sleep){ 132 // } 133 134 // static void btstack_uart_block_freertos_set_csr_irq_handler( void (*csr_irq_handler)(void)){ 135 // } 136 137 static const btstack_uart_block_t btstack_uart_block_freertos = { 138 /* int (*init)(hci_transport_config_uart_t * config); */ &btstack_uart_block_freertos_init, 139 /* int (*open)(void); */ &btstack_uart_block_freertos_open, 140 /* int (*close)(void); */ &btstack_uart_block_freertos_close, 141 /* void (*set_block_received)(void (*handler)(void)); */ &btstack_uart_block_freertos_set_block_received, 142 /* void (*set_block_sent)(void (*handler)(void)); */ &btstack_uart_block_freertos_set_block_sent, 143 /* int (*set_baudrate)(uint32_t baudrate); */ &hal_uart_dma_set_baud, 144 /* int (*set_parity)(int parity); */ &btstack_uart_block_freertos_set_parity, 145 /* void (*receive_block)(uint8_t *buffer, uint16_t len); */ &hal_uart_dma_receive_block, 146 /* void (*send_block)(const uint8_t *buffer, uint16_t length); */ &hal_uart_dma_send_block, 147 /* int (*get_supported_sleep_modes); */ NULL, 148 /* void (*set_sleep)(btstack_uart_sleep_mode_t sleep_mode); */ NULL, 149 /* void (*set_wakeup_handler)(void (*wakeup_handler)(void)); */ NULL, 150 }; 151 152 const btstack_uart_block_t * btstack_uart_block_freertos_instance(void){ 153 return &btstack_uart_block_freertos; 154 }