1 /* 2 * Copyright (C) 2017 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_em9304_spi.h 40 * 41 * BTstack's Hardware Abstraction Layer for EM9304 connected via SPI with additional RDY Interrupt line 42 43 */ 44 #ifndef __BTSTACK_EM9304_SPI_H 45 #define __BTSTACK_EM9304_SPI_H 46 47 #include <stdint.h> 48 49 #if defined __cplusplus 50 extern "C" { 51 #endif 52 53 /* API_START */ 54 55 #include <stdint.h> 56 typedef struct { 57 58 /* API_START */ 59 60 /** 61 * @brief Open SPI 62 */ 63 int (*open)(void); 64 65 /** 66 * @brief Close SPI 67 */ 68 int (*close)(void); 69 70 /** 71 * @brief Check if full duplex operation via transceive is supported 72 * @return 1 if supported 73 */ 74 int (*get_fullduplex_support)(void); 75 76 /** 77 * @brief Set callback for RDY 78 * @param callback or NULL to disable callback 79 */ 80 void (*set_ready_callback)(void (*callback)(void)); 81 82 /** 83 * @brief Set callback for transfer complete 84 * @param callback 85 */ 86 void (*set_transfer_done_callback)(void (*callback)(void)); 87 88 /** 89 * @brief Set Chip Selet 90 * @param enable 91 */ 92 void (*set_chip_select)(int enable); 93 94 /** 95 * @brief Poll READY state 96 */ 97 int (*get_ready)(void); 98 99 /** 100 * @brief Transmit and Receive bytes via SPI 101 * @param tx_data buffer to transmit 102 * @param rx_data buffer to receive into 103 * @param len 104 */ 105 void (*transceive)(const uint8_t * tx_data, uint8_t * rx_data, uint16_t len); 106 107 /** 108 * @brief Transmit bytes via SPI 109 * @param tx_data buffer to transmit 110 * @param len 111 */ 112 void (*transmit)(const uint8_t * tx_data, uint16_t len); 113 114 /** 115 * @brief Receive bytes via SPI 116 * @param rx_data buffer to receive into 117 * @param len 118 */ 119 void (*receive)(uint8_t * rx_data, uint16_t len); 120 121 } btstack_em9304_spi_t; 122 123 /** 124 * 125 */ 126 const btstack_em9304_spi_t * btstack_em9304_spi_embedded_instance(void); 127 128 #if defined __cplusplus 129 } 130 #endif 131 132 #endif // __BTSTACK_EM9304_SPI_H 133