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_system.c@0:9b334a45a8ff, 2015-10-01 (annotated)

Committer:
bogdanm
Date:
Thu Oct 01 15:25:22 2015 +0300
Revision:
0:9b334a45a8ff
Child:
50:a417edff4437
Initial commit on mbed-dev



Replaces mbed-src (now inactive)

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 0:9b334a45a8ff 1 /***************************************************************************//**
bogdanm 0:9b334a45a8ff 2 * @file em_system.c
bogdanm 0:9b334a45a8ff 3 * @brief System Peripheral API
bogdanm 0:9b334a45a8ff 4 * @version 3.20.12
bogdanm 0:9b334a45a8ff 5 *******************************************************************************
bogdanm 0:9b334a45a8ff 6 * @section License
bogdanm 0:9b334a45a8ff 7 * <b>(C) Copyright 2014 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
bogdanm 0:9b334a45a8ff 34 #include "em_system.h"
bogdanm 0:9b334a45a8ff 35 #include "em_assert.h"
bogdanm 0:9b334a45a8ff 36
bogdanm 0:9b334a45a8ff 37 /***************************************************************************//**
bogdanm 0:9b334a45a8ff 38 * @addtogroup EM_Library
bogdanm 0:9b334a45a8ff 39 * @{
bogdanm 0:9b334a45a8ff 40 ******************************************************************************/
bogdanm 0:9b334a45a8ff 41
bogdanm 0:9b334a45a8ff 42 /***************************************************************************//**
bogdanm 0:9b334a45a8ff 43 * @addtogroup SYSTEM
bogdanm 0:9b334a45a8ff 44 * @brief System Peripheral API
bogdanm 0:9b334a45a8ff 45 * @{
bogdanm 0:9b334a45a8ff 46 ******************************************************************************/
bogdanm 0:9b334a45a8ff 47
bogdanm 0:9b334a45a8ff 48 /*******************************************************************************
bogdanm 0:9b334a45a8ff 49 ************************** GLOBAL FUNCTIONS *******************************
bogdanm 0:9b334a45a8ff 50 ******************************************************************************/
bogdanm 0:9b334a45a8ff 51
bogdanm 0:9b334a45a8ff 52 /***************************************************************************//**
bogdanm 0:9b334a45a8ff 53 * @brief
bogdanm 0:9b334a45a8ff 54 * Get chip major/minor revision.
bogdanm 0:9b334a45a8ff 55 *
bogdanm 0:9b334a45a8ff 56 * @param[out] rev
bogdanm 0:9b334a45a8ff 57 * Location to place chip revision info.
bogdanm 0:9b334a45a8ff 58 ******************************************************************************/
bogdanm 0:9b334a45a8ff 59 void SYSTEM_ChipRevisionGet(SYSTEM_ChipRevision_TypeDef *rev)
bogdanm 0:9b334a45a8ff 60 {
bogdanm 0:9b334a45a8ff 61 uint8_t tmp;
bogdanm 0:9b334a45a8ff 62
bogdanm 0:9b334a45a8ff 63 EFM_ASSERT(rev);
bogdanm 0:9b334a45a8ff 64
bogdanm 0:9b334a45a8ff 65 /* CHIP FAMILY bit [5:2] */
bogdanm 0:9b334a45a8ff 66 tmp = (((ROMTABLE->PID1 & _ROMTABLE_PID1_FAMILYMSB_MASK) >> _ROMTABLE_PID1_FAMILYMSB_SHIFT) << 2);
bogdanm 0:9b334a45a8ff 67 /* CHIP FAMILY bit [1:0] */
bogdanm 0:9b334a45a8ff 68 tmp |= ((ROMTABLE->PID0 & _ROMTABLE_PID0_FAMILYLSB_MASK) >> _ROMTABLE_PID0_FAMILYLSB_SHIFT);
bogdanm 0:9b334a45a8ff 69 rev->family = tmp;
bogdanm 0:9b334a45a8ff 70
bogdanm 0:9b334a45a8ff 71 /* CHIP MAJOR bit [3:0] */
bogdanm 0:9b334a45a8ff 72 rev->major = (ROMTABLE->PID0 & _ROMTABLE_PID0_REVMAJOR_MASK) >> _ROMTABLE_PID0_REVMAJOR_SHIFT;
bogdanm 0:9b334a45a8ff 73
bogdanm 0:9b334a45a8ff 74 /* CHIP MINOR bit [7:4] */
bogdanm 0:9b334a45a8ff 75 tmp = (((ROMTABLE->PID2 & _ROMTABLE_PID2_REVMINORMSB_MASK) >> _ROMTABLE_PID2_REVMINORMSB_SHIFT) << 4);
bogdanm 0:9b334a45a8ff 76 /* CHIP MINOR bit [3:0] */
bogdanm 0:9b334a45a8ff 77 tmp |= ((ROMTABLE->PID3 & _ROMTABLE_PID3_REVMINORLSB_MASK) >> _ROMTABLE_PID3_REVMINORLSB_SHIFT);
bogdanm 0:9b334a45a8ff 78 rev->minor = tmp;
bogdanm 0:9b334a45a8ff 79 }
bogdanm 0:9b334a45a8ff 80
bogdanm 0:9b334a45a8ff 81 /***************************************************************************//**
bogdanm 0:9b334a45a8ff 82 * @brief
bogdanm 0:9b334a45a8ff 83 * Get factory calibration value for a given peripheral register.
bogdanm 0:9b334a45a8ff 84 *
bogdanm 0:9b334a45a8ff 85 * @param[in] regAddress
bogdanm 0:9b334a45a8ff 86 * Address of register to get a calibration value for.
bogdanm 0:9b334a45a8ff 87 *
bogdanm 0:9b334a45a8ff 88 * @return
bogdanm 0:9b334a45a8ff 89 * Calibration value for the requested register.
bogdanm 0:9b334a45a8ff 90 ******************************************************************************/
bogdanm 0:9b334a45a8ff 91 uint32_t SYSTEM_GetCalibrationValue(volatile uint32_t *regAddress)
bogdanm 0:9b334a45a8ff 92 {
bogdanm 0:9b334a45a8ff 93 int regCount;
bogdanm 0:9b334a45a8ff 94 CALIBRATE_TypeDef *p;
bogdanm 0:9b334a45a8ff 95
bogdanm 0:9b334a45a8ff 96 regCount = 1;
bogdanm 0:9b334a45a8ff 97 p = CALIBRATE;
bogdanm 0:9b334a45a8ff 98
bogdanm 0:9b334a45a8ff 99 for (;; )
bogdanm 0:9b334a45a8ff 100 {
bogdanm 0:9b334a45a8ff 101 if ((regCount > CALIBRATE_MAX_REGISTERS) ||
bogdanm 0:9b334a45a8ff 102 (p->VALUE == 0xFFFFFFFF))
bogdanm 0:9b334a45a8ff 103 {
bogdanm 0:9b334a45a8ff 104 EFM_ASSERT(false);
bogdanm 0:9b334a45a8ff 105 return 0; /* End of device calibration table reached. */
bogdanm 0:9b334a45a8ff 106 }
bogdanm 0:9b334a45a8ff 107
bogdanm 0:9b334a45a8ff 108 if (p->ADDRESS == (uint32_t)regAddress)
bogdanm 0:9b334a45a8ff 109 {
bogdanm 0:9b334a45a8ff 110 return p->VALUE; /* Calibration value found ! */
bogdanm 0:9b334a45a8ff 111 }
bogdanm 0:9b334a45a8ff 112
bogdanm 0:9b334a45a8ff 113 p++;
bogdanm 0:9b334a45a8ff 114 regCount++;
bogdanm 0:9b334a45a8ff 115 }
bogdanm 0:9b334a45a8ff 116 }
bogdanm 0:9b334a45a8ff 117
bogdanm 0:9b334a45a8ff 118 /** @} (end addtogroup SYSTEM) */
bogdanm 0:9b334a45a8ff 119 /** @} (end addtogroup EM_Library) */