1 // Copyright (c) 2010, Atmel Corporation. 2 // All rights reserved. 3 // 4 // Redistribution and use in source and binary forms, with or without 5 // modification, are permitted provided that the following conditions are met: 6 // * Redistributions of source code must retain the above copyright 7 // notice, this list of conditions and the following disclaimer. 8 // * Redistributions in binary form must reproduce the above copyright 9 // notice, this list of conditions and the following disclaimer in the 10 // documentation and/or other materials provided with the distribution. 11 // * Neither the name of Atmel nor the 12 // names of its contributors may be used to endorse or promote products 13 // derived from this software without specific prior written permission. 14 // 15 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND 16 // ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 17 // WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 18 // DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY 19 // DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 20 // (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 21 // LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 22 // ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 24 // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 26 #ifndef SHA_COMM_H 27 #define SHA_COMM_H 28 29 #include <stdint.h> 30 31 #define SHA_WATCHDOG_TIMEOUT (21) //!< maximum watchdog timeout of device in s 32 33 #define SHA_COMMAND_SIZE_MIN (6) //!< minimum number of bytes in command (from count byte to second CRC byte) 34 #define SHA_RESPONSE_SIZE_MIN (4) //!< minimum number of bytes in response 35 36 #define SHA_BUFFER_POS_COUNT (0) //!< buffer index of count byte in command or response 37 #define SHA_BUFFER_POS_STATUS (1) //!< buffer index of status byte in response 38 39 #define SHA_STATUS_BYTE_WAKEUP (0x11) //!< status byte after wakeup 40 #define SHA_STATUS_BYTE_PARSE (0x03) //!< command parse error 41 #define SHA_STATUS_BYTE_EXEC (0x0F) //!< command execution error 42 #define SHA_STATUS_BYTE_COMM (0xFF) //!< communication error 43 44 #define SHA_RETRY_COUNT (3) //!< number of rx retries 45 46 #define WATCHDOG_TIMEOUT (21) //!< maximum watchdog timeout of device in s 47 48 /** \brief used as parameter group for communication functions */ 49 typedef struct { 50 uint8_t *txBuffer; 51 uint8_t *rxBuffer; 52 uint8_t rxSize; 53 uint32_t executionDelay; 54 } SHA_CommParameters; 55 56 57 uint8_t SHAC_Wakeup(); 58 int8_t SHAC_SendAndReceive(SHA_CommParameters *params); 59 #endif 60