sam7_flash.mac

Segger JTAG Debugger

/*********************************************************************
*               SEGGER MICROCONTROLLER SYSTEME GmbH                  *
*       Solutions for real time microcontroller applications         *
**********************************************************************
*                                                                    *
*       (C) 2004 - 2005   SEGGER Microcontroller Systeme GmbH        *
*                                                                    *
*        www.segger.com   Support: [e-mail]                *
*                                                                    *
**********************************************************************

----------------------------------------------------------------------
File    : SAM7_Flash.mac
Purpose : Setup file for IAR
          Feel free to modify this file acc. to your target system.
--------  END-OF-HEADER  ---------------------------------------------
*/

__var i;
__var k;


/*********************************************************************
*
*       _DisableWatchdog()
*/
_DisableWatchdog() {
  __writeMemory32(0x00008000,0xFFFFFD44,"Memory");  //      AT91C_BASE_WDTC->WDTC_WDMR= AT91C_SYSC_WDDIS;
}


/*********************************************************************
*
*       _MapFlashAt0()
*
* Function description
*   Maps Flash at 0.
*   This is default after RESET, but it is possible that the application
*   already had a chance to run and map RAM to 0.
*   So it does not hurt to make sure that Flash is located at 0.
*
* Notes
*   (1) Unfortunately, the mapping can not be assigned, but only toggled.
*       Therefor we need to check if RAM is at 0 by trying to modify the
*       data at addr. 0.
*/
_MapFlashAt0(){
  i = __readMemory32(0x00000000,"Memory");
  i = i + 1;
  __writeMemory32(i, 0x00,"Memory");
  k =__readMemory32(0x00000000,"Memory");
  if (i == k) {
    __message "Changing mapping: Flash remapped to 0";  
    __writeMemory32(0x00000001,0xFFFFFF00,"Memory");
  }
}

/*********************************************************************
*
*       _InitAIC()
*/
_InitAIC() {
  __writeMemory32(0xFFFFFFFF,0xFFFFF124,"Memory");    // Mask All interrupt pAic->AIC_IDCR = 0xFFFFFFFF;
  for (i = 0; i < 8; i++) {
    k =  __readMemory32(0xFFFFF130,"Memory");        // AT91C_BASE_AIC->AIC_EOICR
  }
}

/*********************************************************************
*
*       _InitRSTC()
*
* Function description
*   Initializes the RSTC (Reset controller).
*   This makes sense since the default is to not allow user resets, which makes it impossible to
*   apply a second RESET via J-Link
*/
_InitRSTC() {
  __writeMemory32(0xA5000001, 0xFFFFFD08,"Memory");    // Allow user reset
}

/*********************************************************************
*
*       _InitPLL()
*/
_InitPLL() {
  __writeMemory32(0x002f0100,0xFFFFFF60,"Memory");    // Set 1 wait state for flash (2 cycles)
  __writeMemory32(0x00000601,0xFFFFFc20,"Memory");    // PLL              
  __writeMemory32(0x10191c05,0xFFFFFc2c,"Memory");    // PLL
  __writeMemory32(0x00000007,0xFFFFFc30,"Memory");    // PLL
}

/*********************************************************************
*
*       _Init()
*/
_Init() {
  _InitPLL();
  __emulatorSpeed(4000000);  // Use full JTAG speed
  _InitAIC();
  _DisableWatchdog();
  _InitRSTC();
  _MapFlashAt0();
}

/*********************************************************************
*
*       execUserReset()
*/
execUserReset() {
  __message "execUserReset()";  
  __emulatorSpeed(30000);    // Slow JTAG speed to be on the safe side
  __hwReset(0);
  _Init();
}

/*********************************************************************
*
*       execUserPreload()
*/
execUserPreload() {
  __message "execUserPreload()";  
  _Init();
}

/**************** End of file ***************************************/