259 lines
8.7 KiB
C
259 lines
8.7 KiB
C
/**
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* @file xmc_fce.c
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* @date 2015-06-20
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*
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* @cond
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*********************************************************************************************************************
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* XMClib v2.1.12 - XMC Peripheral Driver Library
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*
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* Copyright (c) 2015-2017, Infineon Technologies AG
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,are permitted provided that the
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* following conditions are met:
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*
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* Redistributions of source code must retain the above copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided with the distribution.
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*
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* Neither the name of the copyright holders nor the names of its contributors may be used to endorse or promote
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* products derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY,OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* To improve the quality of the software, users are encouraged to share modifications, enhancements or bug fixes with
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* Infineon Technologies AG dave@infineon.com).
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*********************************************************************************************************************
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*
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* Change History
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* --------------
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*
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* 2015-02-20:
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* - Initial <br>
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*
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* 2015-06-20:
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* - Removed GetDriverVersion API
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* @endcond
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*
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*/
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/**********************************************************************************************************************
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* HEADER FILES
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*********************************************************************************************************************/
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#include <xmc_fce.h>
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#if defined (FCE)
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#include <xmc_scu.h>
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/*******************************************************************************
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* API IMPLEMENTATION
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*********************************************************************************************************************/
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/*
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* Initialize the FCE peripheral:
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* Update FCE configuration and initialize seed value
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*/
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XMC_FCE_STATUS_t XMC_FCE_Init(const XMC_FCE_t *const engine)
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{
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engine->kernel_ptr->CFG = engine->fce_cfg_update.regval;
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engine->kernel_ptr->CRC = engine->seedvalue;
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return XMC_FCE_STATUS_OK;
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}
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/* Disable FCE */
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void XMC_FCE_Disable(void)
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{
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FCE->CLC |= (uint32_t)FCE_CLC_DISR_Msk;
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XMC_SCU_RESET_AssertPeripheralReset(XMC_SCU_PERIPHERAL_RESET_FCE);
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#if defined(CLOCK_GATING_SUPPORTED)
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XMC_SCU_CLOCK_GatePeripheralClock(XMC_SCU_PERIPHERAL_CLOCK_FCE);
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#endif
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}
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/* Enable FCE */
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void XMC_FCE_Enable(void)
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{
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#if defined(CLOCK_GATING_SUPPORTED)
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XMC_SCU_CLOCK_UngatePeripheralClock(XMC_SCU_PERIPHERAL_CLOCK_FCE);
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#endif
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XMC_SCU_RESET_DeassertPeripheralReset(XMC_SCU_PERIPHERAL_RESET_FCE);
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FCE->CLC &= (uint32_t)~FCE_CLC_DISR_Msk;
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}
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/* Calculate and return the SAE J1850 CRC8 checksum */
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XMC_FCE_STATUS_t XMC_FCE_CalculateCRC8(const XMC_FCE_t *const engine,
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const uint8_t *data,
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uint32_t length,
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uint8_t *result)
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{
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XMC_FCE_STATUS_t status = XMC_FCE_STATUS_OK;
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XMC_ASSERT("XMC_FCE_CalculateCRC8: Wrong FCE kernel used", (engine -> kernel_ptr == XMC_FCE_CRC8));
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if (length == 0UL)
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{
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status = XMC_FCE_STATUS_ERROR;
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}
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else
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{
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while (0UL != length)
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{
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engine->kernel_ptr->IR = *data;
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data++;
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length -= 1U;
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}
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*result = (uint8_t)engine->kernel_ptr->CRC;
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}
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return status;
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}
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/* Calculate and return calculated CCITT CRC16 checksum */
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XMC_FCE_STATUS_t XMC_FCE_CalculateCRC16(const XMC_FCE_t *const engine,
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const uint16_t *data,
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uint32_t length,
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uint16_t *result)
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{
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XMC_FCE_STATUS_t status = XMC_FCE_STATUS_OK;
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XMC_ASSERT("XMC_FCE_CalculateCRC16: Wrong FCE kernel used", (engine -> kernel_ptr == XMC_FCE_CRC16));
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XMC_ASSERT("XMC_FCE_CalculateCRC16: Length field is empty", (length != 0));
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XMC_ASSERT("XMC_FCE_CalculateCRC16: Length is not aligned", ((length & 0x01) == 0));
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XMC_ASSERT("XMC_FCE_CalculateCRC16: Buffer is not aligned", (((uint32_t)data % 2U) == 0));
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/* Check if data and length are word aligned */
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if (((length & 0x01U) != 0U) || (((uint32_t)length % 2U) != 0U))
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{
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status = XMC_FCE_STATUS_ERROR;
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}
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else
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{
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while (0UL != length)
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{
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engine->kernel_ptr->IR = *data;
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data++;
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length -= 2U;
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}
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*result = (uint16_t)engine->kernel_ptr->CRC;
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}
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return status;
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}
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/* Calculate and return the IEEE 802.3 Ethernet CRC32 checksum */
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XMC_FCE_STATUS_t XMC_FCE_CalculateCRC32(const XMC_FCE_t *const engine,
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const uint32_t *data,
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uint32_t length,
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uint32_t *result)
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{
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XMC_FCE_STATUS_t status = XMC_FCE_STATUS_OK;
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XMC_ASSERT("XMC_FCE_CalculateCRC32: Wrong FCE kernel used", ((engine->kernel_ptr == XMC_FCE_CRC32_0) ||
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(engine->kernel_ptr == XMC_FCE_CRC32_1)));
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XMC_ASSERT("XMC_FCE_CalculateCRC32: Length field is empty", (length != 0));
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XMC_ASSERT("XMC_FCE_CalculateCRC32: Length is not aligned", ((length & 0x03) == 0));
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XMC_ASSERT("XMC_FCE_CalculateCRC32: Buffer is not aligned", (((uint32_t)data % 4U) == 0));
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/* Check if data and length are word aligned */
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if (((length & 0x03U) != 0U) || (((uint32_t)length % 4U) != 0U))
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{
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status = XMC_FCE_STATUS_ERROR;
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}
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else
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{
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while (0UL != length)
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{
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engine->kernel_ptr->IR = *data;
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data++;
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length -= 4U;
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}
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*result = engine->kernel_ptr->CRC;
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}
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return status;
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}
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/* Trigger mismatch in the CRC registers */
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void XMC_FCE_TriggerMismatch(const XMC_FCE_t *const engine, XMC_FCE_CTR_TEST_t test)
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{
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/* Create a 0 to 1 transition and clear to 0 once it is done */
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engine->kernel_ptr->CTR &= ~((uint32_t)test);
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engine->kernel_ptr->CTR |= (uint32_t)test;
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engine->kernel_ptr->CTR &= ~((uint32_t)test);
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}
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/* Change endianness of 16-bit input buffer */
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void XMC_FCE_LittleEndian16bit(uint8_t* inbuffer, uint16_t* outbuffer, uint16_t length)
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{
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uint16_t counter = 0U;
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uint16_t bytecounter = 0U;
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if ((length & 0x01U) == 0)
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{
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for (counter = 0U; counter < (length >> 1); counter++)
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{
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outbuffer[counter] = 0U;
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}
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outbuffer[counter] = 0U;
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counter = 0U;
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while (length)
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{
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outbuffer[counter] = ((uint16_t)((uint16_t)inbuffer[bytecounter] << 8U) |
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(inbuffer[bytecounter + 1U]));
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counter += 1U;
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bytecounter += 2U;
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length -= 2U;
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}
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}
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}
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/* Change endianness of 32-bit input buffer */
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void XMC_FCE_LittleEndian32bit(uint8_t* inbuffer, uint32_t* outbuffer, uint16_t length)
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{
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uint16_t counter = 0U;
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uint16_t bytecounter = 0U;
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if ((length & 0x03U) == 0)
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{
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for (counter = 0U; counter < (length >> 2U); counter++)
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{
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outbuffer[counter] = 0U;
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}
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outbuffer[counter] = 0U;
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counter = 0U;
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while (length)
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{
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outbuffer[counter] = ((uint32_t)inbuffer[bytecounter] << 24U) |
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((uint32_t)inbuffer[bytecounter + 1U] << 16U) |
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((uint32_t)inbuffer[bytecounter + 2U] << 8U) |
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(inbuffer[bytecounter + 3U]);
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counter += 1U;
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bytecounter += 4U;
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length -= 4U;
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}
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}
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}
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#endif
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