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 61 // callbacks 62 static void (*block_sent)(void); 63 static void (*block_received)(void); 64 65 66 static void btstack_uart_block_received(void){ 67 receive_complete = 1; 68 btstack_run_loop_embedded_trigger(); 69 } 70 71 static void btstack_uart_block_sent(void){ 72 send_complete = 1; 73 btstack_run_loop_embedded_trigger(); 74 } 75 76 static int btstack_uart_embedded_init(const btstack_uart_config_t * config){ 77 uart_config = config; 78 hal_uart_dma_set_block_received(&btstack_uart_block_received); 79 hal_uart_dma_set_block_sent(&btstack_uart_block_sent); 80 return 0; 81 } 82 83 static void btstack_uart_embedded_process(btstack_data_source_t *ds, btstack_data_source_callback_type_t callback_type) { 84 switch (callback_type){ 85 case DATA_SOURCE_CALLBACK_POLL: 86 if (send_complete){ 87 send_complete = 0; 88 block_sent(); 89 } 90 if (receive_complete){ 91 receive_complete = 0; 92 block_received(); 93 } 94 break; 95 default: 96 break; 97 } 98 } 99 100 static int btstack_uart_embedded_open(void){ 101 hal_uart_dma_init(); 102 hal_uart_dma_set_baud(uart_config->baudrate); 103 104 // set up polling data_source 105 btstack_run_loop_set_data_source_handler(&transport_data_source, &btstack_uart_embedded_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_embedded_close(void){ 112 113 // remove data source 114 btstack_run_loop_disable_data_source_callbacks(&transport_data_source, DATA_SOURCE_CALLBACK_POLL); 115 btstack_run_loop_remove_data_source(&transport_data_source); 116 117 // close device 118 // ... 119 return 0; 120 } 121 122 static void btstack_uart_embedded_set_block_received( void (*block_handler)(void)){ 123 block_received = block_handler; 124 } 125 126 static void btstack_uart_embedded_set_block_sent( void (*block_handler)(void)){ 127 block_sent = block_handler; 128 } 129 130 static int btstack_uart_embedded_set_parity(int parity){ 131 return 0; 132 } 133 134 static void btstack_uart_embedded_send_block(const uint8_t *data, uint16_t size){ 135 hal_uart_dma_send_block(data, size); 136 } 137 138 static void btstack_uart_embedded_receive_block(uint8_t *buffer, uint16_t len){ 139 hal_uart_dma_receive_block(buffer, len); 140 } 141 142 // static void btstack_uart_embedded_set_sleep(uint8_t sleep){ 143 // } 144 145 // static void btstack_uart_embedded_set_csr_irq_handler( void (*csr_irq_handler)(void)){ 146 // } 147 148 static const btstack_uart_block_t btstack_uart_embedded = { 149 /* int (*init)(hci_transport_config_uart_t * config); */ &btstack_uart_embedded_init, 150 /* int (*open)(void); */ &btstack_uart_embedded_open, 151 /* int (*close)(void); */ &btstack_uart_embedded_close, 152 /* void (*set_block_received)(void (*handler)(void)); */ &btstack_uart_embedded_set_block_received, 153 /* void (*set_block_sent)(void (*handler)(void)); */ &btstack_uart_embedded_set_block_sent, 154 /* int (*set_baudrate)(uint32_t baudrate); */ &hal_uart_dma_set_baud, 155 /* int (*set_parity)(int parity); */ &btstack_uart_embedded_set_parity, 156 /* void (*receive_block)(uint8_t *buffer, uint16_t len); */ &btstack_uart_embedded_receive_block, 157 /* void (*send_block)(const uint8_t *buffer, uint16_t length); */ &btstack_uart_embedded_send_block, 158 /* int (*get_supported_sleep_modes); */ NULL, 159 /* void (*set_sleep)(btstack_uart_sleep_mode_t sleep_mode); */ NULL 160 }; 161 162 const btstack_uart_block_t * btstack_uart_block_embedded_instance(void){ 163 return &btstack_uart_embedded; 164 }