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@147:ba84b7dc41a7, 2016-09-10 (annotated)

Committer:
JojoS
Date:
Sat Sep 10 15:32:04 2016 +0000
Revision:
147:ba84b7dc41a7
Parent:
144:ef7eb2e8f9f7 
added prescaler for 16 bit timers (solution as in LPC11xx), default prescaler 31 for max 28 ms period time

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 144:ef7eb2e8f9f7 1 /***************************************************************************//**
<> 144:ef7eb2e8f9f7 2 * @file em_system.c
<> 144:ef7eb2e8f9f7 3 * @brief System Peripheral API
<> 144:ef7eb2e8f9f7 4 * @version 4.2.1
<> 144:ef7eb2e8f9f7 5 *******************************************************************************
<> 144:ef7eb2e8f9f7 6 * @section License
<> 144:ef7eb2e8f9f7 7 * <b>(C) Copyright 2015 Silicon Labs, http://www.silabs.com</b>
<> 144:ef7eb2e8f9f7 8 *******************************************************************************
<> 144:ef7eb2e8f9f7 9 *
<> 144:ef7eb2e8f9f7 10 * Permission is granted to anyone to use this software for any purpose,
<> 144:ef7eb2e8f9f7 11 * including commercial applications, and to alter it and redistribute it
<> 144:ef7eb2e8f9f7 12 * freely, subject to the following restrictions:
<> 144:ef7eb2e8f9f7 13 *
<> 144:ef7eb2e8f9f7 14 * 1. The origin of this software must not be misrepresented; you must not
<> 144:ef7eb2e8f9f7 15 * claim that you wrote the original software.
<> 144:ef7eb2e8f9f7 16 * 2. Altered source versions must be plainly marked as such, and must not be
<> 144:ef7eb2e8f9f7 17 * misrepresented as being the original software.
<> 144:ef7eb2e8f9f7 18 * 3. This notice may not be removed or altered from any source distribution.
<> 144:ef7eb2e8f9f7 19 *
<> 144:ef7eb2e8f9f7 20 * DISCLAIMER OF WARRANTY/LIMITATION OF REMEDIES: Silicon Labs has no
<> 144:ef7eb2e8f9f7 21 * obligation to support this Software. Silicon Labs is providing the
<> 144:ef7eb2e8f9f7 22 * Software "AS IS", with no express or implied warranties of any kind,
<> 144:ef7eb2e8f9f7 23 * including, but not limited to, any implied warranties of merchantability
<> 144:ef7eb2e8f9f7 24 * or fitness for any particular purpose or warranties against infringement
<> 144:ef7eb2e8f9f7 25 * of any proprietary rights of a third party.
<> 144:ef7eb2e8f9f7 26 *
<> 144:ef7eb2e8f9f7 27 * Silicon Labs will not be liable for any consequential, incidental, or
<> 144:ef7eb2e8f9f7 28 * special damages, or any other relief, or for any claim by any third party,
<> 144:ef7eb2e8f9f7 29 * arising from your use of this Software.
<> 144:ef7eb2e8f9f7 30 *
<> 144:ef7eb2e8f9f7 31 ******************************************************************************/
<> 144:ef7eb2e8f9f7 32
<> 144:ef7eb2e8f9f7 33 #include "em_system.h"
<> 144:ef7eb2e8f9f7 34 #include "em_assert.h"
<> 144:ef7eb2e8f9f7 35
<> 144:ef7eb2e8f9f7 36 /***************************************************************************//**
<> 144:ef7eb2e8f9f7 37 * @addtogroup EM_Library
<> 144:ef7eb2e8f9f7 38 * @{
<> 144:ef7eb2e8f9f7 39 ******************************************************************************/
<> 144:ef7eb2e8f9f7 40
<> 144:ef7eb2e8f9f7 41 /***************************************************************************//**
<> 144:ef7eb2e8f9f7 42 * @addtogroup SYSTEM
<> 144:ef7eb2e8f9f7 43 * @brief System Peripheral API
<> 144:ef7eb2e8f9f7 44 * @{
<> 144:ef7eb2e8f9f7 45 ******************************************************************************/
<> 144:ef7eb2e8f9f7 46
<> 144:ef7eb2e8f9f7 47 /*******************************************************************************
<> 144:ef7eb2e8f9f7 48 ************************** GLOBAL FUNCTIONS *******************************
<> 144:ef7eb2e8f9f7 49 ******************************************************************************/
<> 144:ef7eb2e8f9f7 50
<> 144:ef7eb2e8f9f7 51 /***************************************************************************//**
<> 144:ef7eb2e8f9f7 52 * @brief
<> 144:ef7eb2e8f9f7 53 * Get chip major/minor revision.
<> 144:ef7eb2e8f9f7 54 *
<> 144:ef7eb2e8f9f7 55 * @param[out] rev
<> 144:ef7eb2e8f9f7 56 * Location to place chip revision info.
<> 144:ef7eb2e8f9f7 57 ******************************************************************************/
<> 144:ef7eb2e8f9f7 58 void SYSTEM_ChipRevisionGet(SYSTEM_ChipRevision_TypeDef *rev)
<> 144:ef7eb2e8f9f7 59 {
<> 144:ef7eb2e8f9f7 60 uint8_t tmp;
<> 144:ef7eb2e8f9f7 61
<> 144:ef7eb2e8f9f7 62 EFM_ASSERT(rev);
<> 144:ef7eb2e8f9f7 63
<> 144:ef7eb2e8f9f7 64 /* CHIP FAMILY bit [5:2] */
<> 144:ef7eb2e8f9f7 65 tmp = (((ROMTABLE->PID1 & _ROMTABLE_PID1_FAMILYMSB_MASK) >> _ROMTABLE_PID1_FAMILYMSB_SHIFT) << 2);
<> 144:ef7eb2e8f9f7 66 /* CHIP FAMILY bit [1:0] */
<> 144:ef7eb2e8f9f7 67 tmp |= ((ROMTABLE->PID0 & _ROMTABLE_PID0_FAMILYLSB_MASK) >> _ROMTABLE_PID0_FAMILYLSB_SHIFT);
<> 144:ef7eb2e8f9f7 68 rev->family = tmp;
<> 144:ef7eb2e8f9f7 69
<> 144:ef7eb2e8f9f7 70 /* CHIP MAJOR bit [3:0] */
<> 144:ef7eb2e8f9f7 71 rev->major = (ROMTABLE->PID0 & _ROMTABLE_PID0_REVMAJOR_MASK) >> _ROMTABLE_PID0_REVMAJOR_SHIFT;
<> 144:ef7eb2e8f9f7 72
<> 144:ef7eb2e8f9f7 73 /* CHIP MINOR bit [7:4] */
<> 144:ef7eb2e8f9f7 74 tmp = (((ROMTABLE->PID2 & _ROMTABLE_PID2_REVMINORMSB_MASK) >> _ROMTABLE_PID2_REVMINORMSB_SHIFT) << 4);
<> 144:ef7eb2e8f9f7 75 /* CHIP MINOR bit [3:0] */
<> 144:ef7eb2e8f9f7 76 tmp |= ((ROMTABLE->PID3 & _ROMTABLE_PID3_REVMINORLSB_MASK) >> _ROMTABLE_PID3_REVMINORLSB_SHIFT);
<> 144:ef7eb2e8f9f7 77 rev->minor = tmp;
<> 144:ef7eb2e8f9f7 78 }
<> 144:ef7eb2e8f9f7 79
<> 144:ef7eb2e8f9f7 80
<> 144:ef7eb2e8f9f7 81 #if defined(CALIBRATE)
<> 144:ef7eb2e8f9f7 82 /***************************************************************************//**
<> 144:ef7eb2e8f9f7 83 * @brief
<> 144:ef7eb2e8f9f7 84 * Get factory calibration value for a given peripheral register.
<> 144:ef7eb2e8f9f7 85 *
<> 144:ef7eb2e8f9f7 86 * @param[in] regAddress
<> 144:ef7eb2e8f9f7 87 * Address of register to get a calibration value for.
<> 144:ef7eb2e8f9f7 88 *
<> 144:ef7eb2e8f9f7 89 * @return
<> 144:ef7eb2e8f9f7 90 * Calibration value for the requested register.
<> 144:ef7eb2e8f9f7 91 ******************************************************************************/
<> 144:ef7eb2e8f9f7 92 uint32_t SYSTEM_GetCalibrationValue(volatile uint32_t *regAddress)
<> 144:ef7eb2e8f9f7 93 {
<> 144:ef7eb2e8f9f7 94 int regCount;
<> 144:ef7eb2e8f9f7 95 CALIBRATE_TypeDef *p;
<> 144:ef7eb2e8f9f7 96
<> 144:ef7eb2e8f9f7 97 regCount = 1;
<> 144:ef7eb2e8f9f7 98 p = CALIBRATE;
<> 144:ef7eb2e8f9f7 99
<> 144:ef7eb2e8f9f7 100 for (;; )
<> 144:ef7eb2e8f9f7 101 {
<> 144:ef7eb2e8f9f7 102 if ((regCount > CALIBRATE_MAX_REGISTERS) ||
<> 144:ef7eb2e8f9f7 103 (p->VALUE == 0xFFFFFFFF))
<> 144:ef7eb2e8f9f7 104 {
<> 144:ef7eb2e8f9f7 105 EFM_ASSERT(false);
<> 144:ef7eb2e8f9f7 106 return 0; /* End of device calibration table reached. */
<> 144:ef7eb2e8f9f7 107 }
<> 144:ef7eb2e8f9f7 108
<> 144:ef7eb2e8f9f7 109 if (p->ADDRESS == (uint32_t)regAddress)
<> 144:ef7eb2e8f9f7 110 {
<> 144:ef7eb2e8f9f7 111 return p->VALUE; /* Calibration value found ! */
<> 144:ef7eb2e8f9f7 112 }
<> 144:ef7eb2e8f9f7 113
<> 144:ef7eb2e8f9f7 114 p++;
<> 144:ef7eb2e8f9f7 115 regCount++;
<> 144:ef7eb2e8f9f7 116 }
<> 144:ef7eb2e8f9f7 117 }
<> 144:ef7eb2e8f9f7 118 #endif /* defined (CALIBRATE) */
<> 144:ef7eb2e8f9f7 119
<> 144:ef7eb2e8f9f7 120 /** @} (end addtogroup SYSTEM) */
<> 144:ef7eb2e8f9f7 121 /** @} (end addtogroup EM_Library) */