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_mpu.c@50:a417edff4437, 2016-01-15 (annotated)

Committer:
mbed_official
Date:
Fri Jan 15 07:45:16 2016 +0000
Revision:
50:a417edff4437
Parent:
0:9b334a45a8ff
Child:
144:ef7eb2e8f9f7
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
bogdanm 0:9b334a45a8ff 1 /***************************************************************************//**
bogdanm 0:9b334a45a8ff 2 * @file em_mpu.c
bogdanm 0:9b334a45a8ff 3 * @brief Memory Protection Unit (MPU) Peripheral API
mbed_official 50:a417edff4437 4 * @version 4.2.1
bogdanm 0:9b334a45a8ff 5 *******************************************************************************
bogdanm 0:9b334a45a8ff 6 * @section License
mbed_official 50:a417edff4437 7 * <b>(C) Copyright 2015 Silicon Labs, http://www.silabs.com</b>
bogdanm 0:9b334a45a8ff 8 *******************************************************************************
bogdanm 0:9b334a45a8ff 9 *
bogdanm 0:9b334a45a8ff 10 * Permission is granted to anyone to use this software for any purpose,
bogdanm 0:9b334a45a8ff 11 * including commercial applications, and to alter it and redistribute it
bogdanm 0:9b334a45a8ff 12 * freely, subject to the following restrictions:
bogdanm 0:9b334a45a8ff 13 *
bogdanm 0:9b334a45a8ff 14 * 1. The origin of this software must not be misrepresented; you must not
bogdanm 0:9b334a45a8ff 15 * claim that you wrote the original software.
bogdanm 0:9b334a45a8ff 16 * 2. Altered source versions must be plainly marked as such, and must not be
bogdanm 0:9b334a45a8ff 17 * misrepresented as being the original software.
bogdanm 0:9b334a45a8ff 18 * 3. This notice may not be removed or altered from any source distribution.
bogdanm 0:9b334a45a8ff 19 *
bogdanm 0:9b334a45a8ff 20 * DISCLAIMER OF WARRANTY/LIMITATION OF REMEDIES: Silicon Labs has no
bogdanm 0:9b334a45a8ff 21 * obligation to support this Software. Silicon Labs is providing the
bogdanm 0:9b334a45a8ff 22 * Software "AS IS", with no express or implied warranties of any kind,
bogdanm 0:9b334a45a8ff 23 * including, but not limited to, any implied warranties of merchantability
bogdanm 0:9b334a45a8ff 24 * or fitness for any particular purpose or warranties against infringement
bogdanm 0:9b334a45a8ff 25 * of any proprietary rights of a third party.
bogdanm 0:9b334a45a8ff 26 *
bogdanm 0:9b334a45a8ff 27 * Silicon Labs will not be liable for any consequential, incidental, or
bogdanm 0:9b334a45a8ff 28 * special damages, or any other relief, or for any claim by any third party,
bogdanm 0:9b334a45a8ff 29 * arising from your use of this Software.
bogdanm 0:9b334a45a8ff 30 *
bogdanm 0:9b334a45a8ff 31 ******************************************************************************/
bogdanm 0:9b334a45a8ff 32
bogdanm 0:9b334a45a8ff 33 #include "em_mpu.h"
bogdanm 0:9b334a45a8ff 34 #if defined(__MPU_PRESENT) && (__MPU_PRESENT == 1)
bogdanm 0:9b334a45a8ff 35 #include "em_assert.h"
bogdanm 0:9b334a45a8ff 36
bogdanm 0:9b334a45a8ff 37
bogdanm 0:9b334a45a8ff 38 /***************************************************************************//**
bogdanm 0:9b334a45a8ff 39 * @addtogroup EM_Library
bogdanm 0:9b334a45a8ff 40 * @{
bogdanm 0:9b334a45a8ff 41 ******************************************************************************/
bogdanm 0:9b334a45a8ff 42
bogdanm 0:9b334a45a8ff 43
bogdanm 0:9b334a45a8ff 44 /***************************************************************************//**
bogdanm 0:9b334a45a8ff 45 * @addtogroup MPU
bogdanm 0:9b334a45a8ff 46 * @brief Memory Protection Unit (MPU) Peripheral API
bogdanm 0:9b334a45a8ff 47 * @details
bogdanm 0:9b334a45a8ff 48 * This module contains functions to enable, disable and setup the MPU.
bogdanm 0:9b334a45a8ff 49 * The MPU is used to control access attributes and permissions in the
bogdanm 0:9b334a45a8ff 50 * memory map. The settings that can be controlled are:
bogdanm 0:9b334a45a8ff 51 *
bogdanm 0:9b334a45a8ff 52 * @li Executable attribute.
bogdanm 0:9b334a45a8ff 53 * @li Cachable, bufferable and shareable attributes.
bogdanm 0:9b334a45a8ff 54 * @li Cache policy.
bogdanm 0:9b334a45a8ff 55 * @li Access permissions: Priviliged or User state, read or write access,
bogdanm 0:9b334a45a8ff 56 * and combinations of all these.
bogdanm 0:9b334a45a8ff 57 *
bogdanm 0:9b334a45a8ff 58 * The MPU can be activated and deactivated with functions:
bogdanm 0:9b334a45a8ff 59 * @verbatim
bogdanm 0:9b334a45a8ff 60 * MPU_Enable(..);
bogdanm 0:9b334a45a8ff 61 * MPU_Disable();@endverbatim
bogdanm 0:9b334a45a8ff 62 * The MPU can control 8 memory regions with individual access control
bogdanm 0:9b334a45a8ff 63 * settings. Section attributes and permissions are set with:
bogdanm 0:9b334a45a8ff 64 * @verbatim
bogdanm 0:9b334a45a8ff 65 * MPU_ConfigureRegion(..);@endverbatim
bogdanm 0:9b334a45a8ff 66 * It is advisable to disable the MPU when altering region settings.
bogdanm 0:9b334a45a8ff 67 *
bogdanm 0:9b334a45a8ff 68 *
bogdanm 0:9b334a45a8ff 69 * @{
bogdanm 0:9b334a45a8ff 70 ******************************************************************************/
bogdanm 0:9b334a45a8ff 71
bogdanm 0:9b334a45a8ff 72
bogdanm 0:9b334a45a8ff 73 /*******************************************************************************
bogdanm 0:9b334a45a8ff 74 ************************** GLOBAL FUNCTIONS *******************************
bogdanm 0:9b334a45a8ff 75 ******************************************************************************/
bogdanm 0:9b334a45a8ff 76
bogdanm 0:9b334a45a8ff 77
bogdanm 0:9b334a45a8ff 78 /***************************************************************************//**
bogdanm 0:9b334a45a8ff 79 * @brief
bogdanm 0:9b334a45a8ff 80 * Configure an MPU region.
bogdanm 0:9b334a45a8ff 81 *
bogdanm 0:9b334a45a8ff 82 * @details
bogdanm 0:9b334a45a8ff 83 * Writes to MPU RBAR and RASR registers.
bogdanm 0:9b334a45a8ff 84 * Refer to Cortex-M3 Reference Manual, MPU chapter for further details.
bogdanm 0:9b334a45a8ff 85 * To disable a region it is only required to set init->regionNo to the
bogdanm 0:9b334a45a8ff 86 * desired value and init->regionEnable = false.
bogdanm 0:9b334a45a8ff 87 *
bogdanm 0:9b334a45a8ff 88 * @param[in] init
bogdanm 0:9b334a45a8ff 89 * Pointer to a structure containing MPU region init information.
bogdanm 0:9b334a45a8ff 90 ******************************************************************************/
bogdanm 0:9b334a45a8ff 91 void MPU_ConfigureRegion(const MPU_RegionInit_TypeDef *init)
bogdanm 0:9b334a45a8ff 92 {
bogdanm 0:9b334a45a8ff 93 EFM_ASSERT(init->regionNo < ((MPU->TYPE & MPU_TYPE_DREGION_Msk) >>
bogdanm 0:9b334a45a8ff 94 MPU_TYPE_DREGION_Pos));
bogdanm 0:9b334a45a8ff 95
bogdanm 0:9b334a45a8ff 96 MPU->RNR = init->regionNo;
bogdanm 0:9b334a45a8ff 97
bogdanm 0:9b334a45a8ff 98 if (init->regionEnable)
bogdanm 0:9b334a45a8ff 99 {
bogdanm 0:9b334a45a8ff 100 EFM_ASSERT(!(init->baseAddress & ~MPU_RBAR_ADDR_Msk));
bogdanm 0:9b334a45a8ff 101 EFM_ASSERT(init->tex <= 0x7);
bogdanm 0:9b334a45a8ff 102
bogdanm 0:9b334a45a8ff 103 MPU->RBAR = init->baseAddress;
mbed_official 50:a417edff4437 104 MPU->RASR = ((init->disableExec ? 1 : 0) << MPU_RASR_XN_Pos)
mbed_official 50:a417edff4437 105 | (init->accessPermission << MPU_RASR_AP_Pos)
mbed_official 50:a417edff4437 106 | (init->tex << MPU_RASR_TEX_Pos)
mbed_official 50:a417edff4437 107 | ((init->shareable ? 1 : 0) << MPU_RASR_S_Pos)
mbed_official 50:a417edff4437 108 | ((init->cacheable ? 1 : 0) << MPU_RASR_C_Pos)
mbed_official 50:a417edff4437 109 | ((init->bufferable ? 1 : 0) << MPU_RASR_B_Pos)
mbed_official 50:a417edff4437 110 | (init->srd << MPU_RASR_SRD_Pos)
mbed_official 50:a417edff4437 111 | (init->size << MPU_RASR_SIZE_Pos)
mbed_official 50:a417edff4437 112 | (1 << MPU_RASR_ENABLE_Pos);
bogdanm 0:9b334a45a8ff 113 }
bogdanm 0:9b334a45a8ff 114 else
bogdanm 0:9b334a45a8ff 115 {
bogdanm 0:9b334a45a8ff 116 MPU->RBAR = 0;
bogdanm 0:9b334a45a8ff 117 MPU->RASR = 0;
bogdanm 0:9b334a45a8ff 118 }
bogdanm 0:9b334a45a8ff 119 }
bogdanm 0:9b334a45a8ff 120
bogdanm 0:9b334a45a8ff 121
bogdanm 0:9b334a45a8ff 122 /** @} (end addtogroup CMU) */
bogdanm 0:9b334a45a8ff 123 /** @} (end addtogroup EM_Library) */
bogdanm 0:9b334a45a8ff 124 #endif /* defined(__MPU_PRESENT) && (__MPU_PRESENT == 1) */