/** @addtogroup crc_file @author @htmlonly © @endhtmlonly 2012 Karl Palsson */ /* * This file is part of the libopencm3 project. * * Copyright (C) 2012 Karl Palsson * * This library is free software: you can redistribute it and/or modify * it under the terms of the GNU Lesser General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public License * along with this library. If not, see . */ #include /**@{*/ /*-----------------------------------------------------------------------------*/ /** @brief CRC Reset. Reset the CRC unit and forces the data register to all 1s. */ void crc_reset(void) { CRC_CR |= CRC_CR_RESET; } /*-----------------------------------------------------------------------------*/ /** @brief CRC Calculate. Writes a data word to the register, the write operation stalling until the computation is complete. @param[in] data Unsigned int32. @returns int32 Computed CRC result */ u32 crc_calculate(u32 data) { CRC_DR = data; // Data sheet says this blocks until it's ready.... return CRC_DR; } /*-----------------------------------------------------------------------------*/ /** @brief CRC Calculate of a Block of Data. Writes data words consecutively to the register, the write operation stalling until the computation of each word is complete. @param[in] datap Unsigned int32. pointer to an array of 32 bit data words. @returns int32 Final computed CRC result */ u32 crc_calculate_block(u32 *datap, int size) { int i; for (i = 0; i < size; i++) { CRC_DR = datap[i]; } return CRC_DR; } /**@}*/