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 BLUEKITCHEN 24 * GMBH 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 * @title EM9304 SPI 40 * 41 * BTstack's Hardware Abstraction Layer for EM9304 connected via SPI with additional RDY Interrupt line. 42 * 43 */ 44 45 #ifndef BTSTACK_EM9304_SPI_H 46 #define BTSTACK_EM9304_SPI_H 47 48 #include <stdint.h> 49 50 #if defined __cplusplus 51 extern "C" { 52 #endif 53 54 /* API_START */ 55 56 #include <stdint.h> 57 typedef struct { 58 59 /** 60 * @brief Open SPI 61 */ 62 int (*open)(void); 63 64 /** 65 * @brief Close SPI 66 */ 67 int (*close)(void); 68 69 /** 70 * @brief Check if full duplex operation via transceive is supported 71 * @return 1 if supported 72 */ 73 int (*get_fullduplex_support)(void); 74 75 /** 76 * @brief Set callback for RDY 77 * @param callback or NULL to disable callback 78 */ 79 void (*set_ready_callback)(void (*callback)(void)); 80 81 /** 82 * @brief Set callback for transfer complete 83 * @param callback 84 */ 85 void (*set_transfer_done_callback)(void (*callback)(void)); 86 87 /** 88 * @brief Set Chip Selet 89 * @param enable 90 */ 91 void (*set_chip_select)(int enable); 92 93 /** 94 * @brief Poll READY state 95 */ 96 int (*get_ready)(void); 97 98 /** 99 * @brief Transmit and Receive bytes via SPI 100 * @param tx_data buffer to transmit 101 * @param rx_data buffer to receive into 102 * @param len 103 */ 104 void (*transceive)(const uint8_t * tx_data, uint8_t * rx_data, uint16_t len); 105 106 /** 107 * @brief Transmit bytes via SPI 108 * @param tx_data buffer to transmit 109 * @param len 110 */ 111 void (*transmit)(const uint8_t * tx_data, uint16_t len); 112 113 /** 114 * @brief Receive bytes via SPI 115 * @param rx_data buffer to receive into 116 * @param len 117 */ 118 void (*receive)(uint8_t * rx_data, uint16_t len); 119 120 } btstack_em9304_spi_t; 121 122 /** 123 * @brief Get EM9304 SPI instance 124 */ 125 const btstack_em9304_spi_t * btstack_em9304_spi_embedded_instance(void); 126 127 /* API_END */ 128 129 #if defined __cplusplus 130 } 131 #endif 132 133 #endif // BTSTACK_EM9304_SPI_H 134