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 /* 39 * btstack_uart_block_embedded.c 40 * 41 * Common code to access UART via asynchronous block read/write commands on top of hal_uart_dma.h 42 * 43 */ 44 45 #include "btstack_debug.h" 46 #include "btstack_uart_block.h" 47 #include "btstack_run_loop_embedded.h" 48 #include "hal_uart_dma.h" 49 50 // uart config 51 static const btstack_uart_config_t * uart_config; 52 53 // data source for integration with BTstack Runloop 54 static btstack_data_source_t transport_data_source; 55 56 static int send_complete; 57 static int receive_complete; 58 59 // callbacks 60 static void (*block_sent)(void); 61 static void (*block_received)(void); 62 63 64 static void btstack_uart_block_received(void){ 65 receive_complete = 1; 66 btstack_run_loop_embedded_trigger(); 67 } 68 69 static void btstack_uart_block_sent(void){ 70 send_complete = 1; 71 btstack_run_loop_embedded_trigger(); 72 } 73 74 static int btstack_uart_embedded_init(const btstack_uart_config_t * config){ 75 uart_config = config; 76 hal_uart_dma_set_block_received(&btstack_uart_block_received); 77 hal_uart_dma_set_block_sent(&btstack_uart_block_sent); 78 return 0; 79 } 80 81 static void btstack_uart_embedded_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 (block_received){ 89 block_received = 0; 90 block_received(); 91 } 92 break; 93 default: 94 break; 95 } 96 } 97 98 static int btstack_uart_embedded_open(void){ 99 hal_uart_dma_init(); 100 hal_uart_dma_set_baud(uart_config->baudrate); 101 102 // set up polling data_source 103 btstack_run_loop_set_data_source_handler(&transport_data_source, &btstack_uart_embedded_process); 104 btstack_run_loop_enable_data_source_callbacks(&transport_data_source, DATA_SOURCE_CALLBACK_POLL); 105 btstack_run_loop_add_data_source(&transport_data_source); 106 return 0; 107 } 108 109 static int btstack_uart_embedded_close(void){ 110 return 0; 111 } 112 113 static void btstack_uart_embedded_set_block_received( void (*block_handler)(void)){ 114 block_received = block_handler; 115 } 116 117 static void btstack_uart_embedded_set_block_sent( void (*block_handler)(void)){ 118 block_sent = block_handler; 119 } 120 121 static int btstack_uart_embedded_set_parity(int parity){ 122 return 0; 123 } 124 125 static void btstack_uart_embedded_send_block(const uint8_t *data, uint16_t size){ 126 hal_uart_dma_send_block(data, size); 127 } 128 129 static void btstack_uart_embedded_receive_block(uint8_t *buffer, uint16_t len){ 130 hal_uart_dma_receive_block(buffer, len); 131 } 132 133 // static void btstack_uart_embedded_set_sleep(uint8_t sleep){ 134 // } 135 136 // static void btstack_uart_embedded_set_csr_irq_handler( void (*csr_irq_handler)(void)){ 137 // } 138 139 static const btstack_uart_block_t btstack_uart_embedded = { 140 /* int (*init)(hci_transport_config_uart_t * config); */ &btstack_uart_embedded_init, 141 /* int (*open)(void); */ &btstack_uart_embedded_open, 142 /* int (*close)(void); */ &btstack_uart_embedded_close, 143 /* void (*set_block_received)(void (*handler)(void)); */ &btstack_uart_embedded_set_block_received, 144 /* void (*set_block_sent)(void (*handler)(void)); */ &btstack_uart_embedded_set_block_sent, 145 /* int (*set_baudrate)(uint32_t baudrate); */ &hal_uart_dma_set_baud, 146 /* int (*set_parity)(int parity); */ &btstack_uart_embedded_set_parity, 147 /* void (*receive_block)(uint8_t *buffer, uint16_t len); */ &btstack_uart_embedded_receive_block, 148 /* void (*send_block)(const uint8_t *buffer, uint16_t length); */ &btstack_uart_embedded_send_block 149 }; 150 151 const btstack_uart_block_t * btstack_uart_block_embedded_instance(void){ 152 return &btstack_uart_embedded; 153 }