em_system.c

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/***************************************************************************/
#include "em_system.h"
#include "em_assert.h"
#include <stddef.h>

/***************************************************************************/
/***************************************************************************/
/*******************************************************************************
 **************************   GLOBAL FUNCTIONS   *******************************
 ******************************************************************************/

/***************************************************************************/
void SYSTEM_ChipRevisionGet(SYSTEM_ChipRevision_TypeDef *rev)
{
  uint8_t tmp;

  EFM_ASSERT(rev);

  /* CHIP FAMILY bit [5:2] */
  tmp  = (((ROMTABLE->PID1 & _ROMTABLE_PID1_FAMILYMSB_MASK) >> _ROMTABLE_PID1_FAMILYMSB_SHIFT) << 2);
  /* CHIP FAMILY bit [1:0] */
  tmp |=  ((ROMTABLE->PID0 & _ROMTABLE_PID0_FAMILYLSB_MASK) >> _ROMTABLE_PID0_FAMILYLSB_SHIFT);
  rev->family = tmp;

  /* CHIP MAJOR bit [3:0] */
  rev->major = (ROMTABLE->PID0 & _ROMTABLE_PID0_REVMAJOR_MASK) >> _ROMTABLE_PID0_REVMAJOR_SHIFT;

  /* CHIP MINOR bit [7:4] */
  tmp  = (((ROMTABLE->PID2 & _ROMTABLE_PID2_REVMINORMSB_MASK) >> _ROMTABLE_PID2_REVMINORMSB_SHIFT) << 4);
  /* CHIP MINOR bit [3:0] */
  tmp |=  ((ROMTABLE->PID3 & _ROMTABLE_PID3_REVMINORLSB_MASK) >> _ROMTABLE_PID3_REVMINORLSB_SHIFT);
  rev->minor = tmp;
}


/***************************************************************************/
bool SYSTEM_GetCalibrationValue(volatile uint32_t *regAddress)
{
  SYSTEM_CalAddrVal_TypeDef * p, * end;

  p   = (SYSTEM_CalAddrVal_TypeDef *)(DEVINFO_BASE & 0xFFFFF000);
  end = (SYSTEM_CalAddrVal_TypeDef *)DEVINFO_BASE;

  for ( ; p < end; p++)
  {
    if (p->address == 0xFFFFFFFF)
    {
      /* Found table terminator */
      return false;
    }
    if (p->address == (uint32_t)regAddress)
    {
      *regAddress = p->calValue;
      return true;
    }
  }
  /* Nothing found for regAddress */
  return false;
}