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125 lines
4.5 KiB
C
125 lines
4.5 KiB
C
/***************************************************************************//**
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* @file em_system.c
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* @brief System Peripheral API
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* @version 4.3.0
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*******************************************************************************
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* @section License
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* <b>Copyright 2016 Silicon Laboratories, Inc. http://www.silabs.com</b>
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*******************************************************************************
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*
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* Permission is granted to anyone to use this software for any purpose,
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* including commercial applications, and to alter it and redistribute it
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* freely, subject to the following restrictions:
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*
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* 1. The origin of this software must not be misrepresented; you must not
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* claim that you wrote the original software.
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* 2. Altered source versions must be plainly marked as such, and must not be
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* misrepresented as being the original software.
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* 3. This notice may not be removed or altered from any source distribution.
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*
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* DISCLAIMER OF WARRANTY/LIMITATION OF REMEDIES: Silicon Labs has no
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* obligation to support this Software. Silicon Labs is providing the
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* Software "AS IS", with no express or implied warranties of any kind,
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* including, but not limited to, any implied warranties of merchantability
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* or fitness for any particular purpose or warranties against infringement
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* of any proprietary rights of a third party.
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*
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* Silicon Labs will not be liable for any consequential, incidental, or
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* special damages, or any other relief, or for any claim by any third party,
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* arising from your use of this Software.
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*
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******************************************************************************/
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#include "em_system.h"
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#include "em_assert.h"
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/***************************************************************************//**
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* @addtogroup emlib
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* @{
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******************************************************************************/
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/***************************************************************************//**
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* @addtogroup SYSTEM
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* @brief System Peripheral API
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* @details
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* This module contains functions to read device information from Silicon
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* Labs 32-bit MCUs and SoCs, as well as control the FPU on compatible devices.
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* @{
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******************************************************************************/
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/*******************************************************************************
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************************** GLOBAL FUNCTIONS *******************************
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******************************************************************************/
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/***************************************************************************//**
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* @brief
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* Get chip major/minor revision.
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*
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* @param[out] rev
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* Location to place chip revision info.
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******************************************************************************/
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void SYSTEM_ChipRevisionGet(SYSTEM_ChipRevision_TypeDef *rev)
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{
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uint8_t tmp;
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EFM_ASSERT(rev);
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/* CHIP FAMILY bit [5:2] */
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tmp = (((ROMTABLE->PID1 & _ROMTABLE_PID1_FAMILYMSB_MASK) >> _ROMTABLE_PID1_FAMILYMSB_SHIFT) << 2);
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/* CHIP FAMILY bit [1:0] */
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tmp |= ((ROMTABLE->PID0 & _ROMTABLE_PID0_FAMILYLSB_MASK) >> _ROMTABLE_PID0_FAMILYLSB_SHIFT);
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rev->family = tmp;
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/* CHIP MAJOR bit [3:0] */
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rev->major = (ROMTABLE->PID0 & _ROMTABLE_PID0_REVMAJOR_MASK) >> _ROMTABLE_PID0_REVMAJOR_SHIFT;
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/* CHIP MINOR bit [7:4] */
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tmp = (((ROMTABLE->PID2 & _ROMTABLE_PID2_REVMINORMSB_MASK) >> _ROMTABLE_PID2_REVMINORMSB_SHIFT) << 4);
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/* CHIP MINOR bit [3:0] */
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tmp |= ((ROMTABLE->PID3 & _ROMTABLE_PID3_REVMINORLSB_MASK) >> _ROMTABLE_PID3_REVMINORLSB_SHIFT);
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rev->minor = tmp;
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}
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#if defined(CALIBRATE)
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/***************************************************************************//**
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* @brief
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* Get factory calibration value for a given peripheral register.
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*
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* @param[in] regAddress
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* Address of register to get a calibration value for.
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*
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* @return
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* Calibration value for the requested register.
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******************************************************************************/
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uint32_t SYSTEM_GetCalibrationValue(volatile uint32_t *regAddress)
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{
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int regCount;
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CALIBRATE_TypeDef *p;
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regCount = 1;
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p = CALIBRATE;
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for (;; )
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{
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if ((regCount > CALIBRATE_MAX_REGISTERS) ||
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(p->VALUE == 0xFFFFFFFF))
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{
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EFM_ASSERT(false);
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return 0; /* End of device calibration table reached. */
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}
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if (p->ADDRESS == (uint32_t)regAddress)
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{
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return p->VALUE; /* Calibration value found ! */
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}
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p++;
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regCount++;
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}
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}
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#endif /* defined (CALIBRATE) */
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/** @} (end addtogroup SYSTEM) */
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/** @} (end addtogroup emlib) */
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