Johannes Stratmann / mbed-dev

added prescaler for 16 bit pwm in LPC1347 target

Fork of mbed-dev by mbed official

targets/hal/TARGET_Silicon_Labs/TARGET_EFM32/emlib/src/em_crc.c@50:a417edff4437, 2016-01-15 (annotated)

Committer:
mbed_official
Date:
Fri Jan 15 07:45:16 2016 +0000
Revision:
50:a417edff4437
Synchronized with git revision 6010f32619bfcbb01cc73747d4ff9040863482d9



Full URL: https://github.com/mbedmicro/mbed/commit/6010f32619bfcbb01cc73747d4ff9040863482d9/



Remove doubling of buffer size in realiseEndpoint()

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 50:a417edff4437 1 /***************************************************************************//**
mbed_official 50:a417edff4437 2 * @file
mbed_official 50:a417edff4437 3 * @brief Cyclic Redundancy Check (CRC) API.
mbed_official 50:a417edff4437 4 * @version 4.2.1
mbed_official 50:a417edff4437 5 *******************************************************************************
mbed_official 50:a417edff4437 6 * @section License
mbed_official 50:a417edff4437 7 * <b>(C) Copyright 2015 Silicon Labs, http://www.silabs.com</b>
mbed_official 50:a417edff4437 8 *******************************************************************************
mbed_official 50:a417edff4437 9 *
mbed_official 50:a417edff4437 10 * Permission is granted to anyone to use this software for any purpose,
mbed_official 50:a417edff4437 11 * including commercial applications, and to alter it and redistribute it
mbed_official 50:a417edff4437 12 * freely, subject to the following restrictions:
mbed_official 50:a417edff4437 13 *
mbed_official 50:a417edff4437 14 * 1. The origin of this software must not be misrepresented; you must not
mbed_official 50:a417edff4437 15 * claim that you wrote the original software.
mbed_official 50:a417edff4437 16 * 2. Altered source versions must be plainly marked as such, and must not be
mbed_official 50:a417edff4437 17 * misrepresented as being the original software.
mbed_official 50:a417edff4437 18 * 3. This notice may not be removed or altered from any source distribution.
mbed_official 50:a417edff4437 19 *
mbed_official 50:a417edff4437 20 * DISCLAIMER OF WARRANTY/LIMITATION OF REMEDIES: Silicon Labs has no
mbed_official 50:a417edff4437 21 * obligation to support this Software. Silicon Labs is providing the
mbed_official 50:a417edff4437 22 * Software "AS IS", with no express or implied warranties of any kind,
mbed_official 50:a417edff4437 23 * including, but not limited to, any implied warranties of merchantability
mbed_official 50:a417edff4437 24 * or fitness for any particular purpose or warranties against infringement
mbed_official 50:a417edff4437 25 * of any proprietary rights of a third party.
mbed_official 50:a417edff4437 26 *
mbed_official 50:a417edff4437 27 * Silicon Labs will not be liable for any consequential, incidental, or
mbed_official 50:a417edff4437 28 * special damages, or any other relief, or for any claim by any third party,
mbed_official 50:a417edff4437 29 * arising from your use of this Software.
mbed_official 50:a417edff4437 30 *
mbed_official 50:a417edff4437 31 ******************************************************************************/
mbed_official 50:a417edff4437 32
mbed_official 50:a417edff4437 33 #include "em_crc.h"
mbed_official 50:a417edff4437 34 #include "em_assert.h"
mbed_official 50:a417edff4437 35
mbed_official 50:a417edff4437 36 #if defined(CRC_COUNT) && (CRC_COUNT > 0)
mbed_official 50:a417edff4437 37
mbed_official 50:a417edff4437 38 /***************************************************************************//**
mbed_official 50:a417edff4437 39 * @addtogroup EM_Library
mbed_official 50:a417edff4437 40 * @{
mbed_official 50:a417edff4437 41 ******************************************************************************/
mbed_official 50:a417edff4437 42
mbed_official 50:a417edff4437 43 /***************************************************************************//**
mbed_official 50:a417edff4437 44 * @addtogroup CRC
mbed_official 50:a417edff4437 45 * @{
mbed_official 50:a417edff4437 46 ******************************************************************************/
mbed_official 50:a417edff4437 47
mbed_official 50:a417edff4437 48 /*******************************************************************************
mbed_official 50:a417edff4437 49 ******************************** ENUMS ************************************
mbed_official 50:a417edff4437 50 ******************************************************************************/
mbed_official 50:a417edff4437 51
mbed_official 50:a417edff4437 52
mbed_official 50:a417edff4437 53 /*******************************************************************************
mbed_official 50:a417edff4437 54 ******************************* STRUCTS ***********************************
mbed_official 50:a417edff4437 55 ******************************************************************************/
mbed_official 50:a417edff4437 56
mbed_official 50:a417edff4437 57
mbed_official 50:a417edff4437 58 /*******************************************************************************
mbed_official 50:a417edff4437 59 *************************** GLOBAL FUNCTIONS ******************************
mbed_official 50:a417edff4437 60 ******************************************************************************/
mbed_official 50:a417edff4437 61
mbed_official 50:a417edff4437 62 /***************************************************************************//**
mbed_official 50:a417edff4437 63 * @brief
mbed_official 50:a417edff4437 64 * Initialize the Cyclic Redundancy Check (CRC) module of EFR.
mbed_official 50:a417edff4437 65 *
mbed_official 50:a417edff4437 66 * @details
mbed_official 50:a417edff4437 67 * Use this function to configure the main operational parameters of the CRC
mbed_official 50:a417edff4437 68 * such as CRC bytes, number of valid input bits, input/output bit- and bit
mbed_official 50:a417edff4437 69 * order reversing.
mbed_official 50:a417edff4437 70 * Refer to EFR Reference Manual Chapter 14 and the configuration structure
mbed_official 50:a417edff4437 71 * CRC_Init_TypeDef for more details.
mbed_official 50:a417edff4437 72 *
mbed_official 50:a417edff4437 73 * @note
mbed_official 50:a417edff4437 74 * Internal notes:
mbed_official 50:a417edff4437 75 * - Initialize the CRC in the Init() function or let users use the separate
mbed_official 50:a417edff4437 76 * command function?
mbed_official 50:a417edff4437 77 *
mbed_official 50:a417edff4437 78 * @param[in] init
mbed_official 50:a417edff4437 79 * Pointer to initialization structure used to configure the CRC.
mbed_official 50:a417edff4437 80 ******************************************************************************/
mbed_official 50:a417edff4437 81 void CRC_Init(CRC_Init_TypeDef const *init)
mbed_official 50:a417edff4437 82 {
mbed_official 50:a417edff4437 83 /* Sanity check of bitsPerWord. */
mbed_official 50:a417edff4437 84 EFM_ASSERT(init->bitsPerWord < 16U);
mbed_official 50:a417edff4437 85
mbed_official 50:a417edff4437 86 /* Set CRC control configuration parameters such as CRC width, byte and bit
mbed_official 50:a417edff4437 87 * bit order, the number of bits per word, inverting input/output, etc. */
mbed_official 50:a417edff4437 88 CRC->CTRL = (uint32_t)init->crcWidth
mbed_official 50:a417edff4437 89 | (uint32_t)init->byteReverse
mbed_official 50:a417edff4437 90 | (uint32_t)init->inputBitOrder
mbed_official 50:a417edff4437 91 | (uint32_t)init->bitReverse
mbed_official 50:a417edff4437 92 | ((uint32_t)init->bitsPerWord >> _CRC_CTRL_BITSPERWORD_SHIFT)
mbed_official 50:a417edff4437 93 | ((uint32_t)init->inputPadding >> _CRC_CTRL_PADCRCINPUT_SHIFT)
mbed_official 50:a417edff4437 94 | ((uint32_t)init->invInput >> _CRC_CTRL_INPUTINV_SHIFT)
mbed_official 50:a417edff4437 95 | ((uint32_t)init->invOutput >> _CRC_CTRL_OUTPUTINV_SHIFT);
mbed_official 50:a417edff4437 96
mbed_official 50:a417edff4437 97 /* Set CRC polynomial value. */
mbed_official 50:a417edff4437 98 CRC->POLY = init->crcPoly;
mbed_official 50:a417edff4437 99
mbed_official 50:a417edff4437 100 /* Load CRC initialization value to CRC_INIT. Please note, that the
mbed_official 50:a417edff4437 101 * initialization is not performed here! */
mbed_official 50:a417edff4437 102 CRC->INIT = init->initValue;
mbed_official 50:a417edff4437 103 }
mbed_official 50:a417edff4437 104
mbed_official 50:a417edff4437 105
mbed_official 50:a417edff4437 106 /***************************************************************************//**
mbed_official 50:a417edff4437 107 * @brief
mbed_official 50:a417edff4437 108 * Reset CRC registers to the hardware reset state.
mbed_official 50:a417edff4437 109 ******************************************************************************/
mbed_official 50:a417edff4437 110 void CRC_Reset(void)
mbed_official 50:a417edff4437 111 {
mbed_official 50:a417edff4437 112 /* Reset CRC registers to their default value. */
mbed_official 50:a417edff4437 113 CRC->CTRL = _CRC_CTRL_RESETVALUE;
mbed_official 50:a417edff4437 114 CRC->POLY = _CRC_POLY_RESETVALUE;
mbed_official 50:a417edff4437 115 CRC->INIT = _CRC_INIT_RESETVALUE;
mbed_official 50:a417edff4437 116 }
mbed_official 50:a417edff4437 117
mbed_official 50:a417edff4437 118
mbed_official 50:a417edff4437 119 /** @} (end addtogroup CRC) */
mbed_official 50:a417edff4437 120 /** @} (end addtogroup EM_Library) */
mbed_official 50:a417edff4437 121
mbed_official 50:a417edff4437 122 #endif /* defined(CRC_COUNT) && (CRC_COUNT > 0) */