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