Demo/ARM9_AT91SAM9XE_IAR/ewp/at91sam9xe-ek-sdram.mac

// ---------------------------------------------------------
//   ATMEL Microcontroller Software Support  -  ROUSSET  -
// ---------------------------------------------------------
// The software is delivered "AS IS" without warranty or
// condition of any  kind, either express, implied or
// statutory. This includes without limitation any warranty
// or condition with respect to merchantability or fitness
// for any particular purpose, or against the infringements of
// intellectual property rights of others.
// ---------------------------------------------------------
//  File: SAM9XE_SDRAM.mac
//  User setup file for CSPY debugger.
//  1.1 08/Aug/06 jpp    : Creation
//
//  $Revision: 23594 $
//
// ---------------------------------------------------------
__var __mac_i;
__var __mac_pt;

/*********************************************************************
*
*       execUserReset() : JTAG set initially to Full Speed
*/
execUserReset()
{
    __message "------------------------------ execUserReset ---------------------------------";
    _MapRAMAt0();                          //* Set the RAM memory at 0x00200000 & 0x00000000
    __PllSetting();                        //* Init PLL
    __PllSetting100MHz();              
    __message "-------------------------------Set PC Reset ----------------------------------";
}

/*********************************************************************
*
*       execUserPreload() : JTAG set initially to 32kHz
*/
execUserPreload()
{
    __message "------------------------------ execUserPreload ---------------------------------";
    __hwReset(0);                          //* Hardware Reset: CPU is automatically halted after the reset (JTAG is already configured to 32kHz)
    __writeMemory32(0xD3,0x98,"Register"); //*  Set CPSR
    __PllSetting();                        //* Init PLL
    __PllSetting100MHz();    
    __initSDRAM();                         //* Init SDRAM before load          
    _MapRAMAt0();                          //* Set the RAM memory at 0x0020 0000 & 0x0000 0000
    _InitRSTC();                           //* Enable User Reset to allow execUserReset() execution
}



/*********************************************************************
*
*       _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
}


/*********************************************************************
*
*       __initSDRAM()
* Function description
* Set SDRAM for works at 100 MHz
*/
__initSDRAM()
{
//* Configure EBI Chip select	
//    pCCFG->CCFG_EBICSA |= AT91C_EBI_CS1A_SDRAMC;
// AT91C_CCFG_EBICSA ((AT91_REG *) 	0xFFFFEF1C) // (CCFG)  EBI Chip Select Assignement Register
    __writeMemory32(0x0001003A,0xFFFFEF1C,"Memory");


//*  Configure PIOs
//*	AT91F_PIO_CfgPeriph( AT91C_BASE_PIOC, AT91C_PC16_D16 to AT91C_PC16_D31
// pPio->PIO_ASR = periphAEnable; AT91C_PIOC_ASR ((AT91_REG *) 0xFFFFF870) // (PIOC) Select A Register
// pPio->PIO_BSR = periphBEnable;AT91C_PIOC_BSR  ((AT91_REG *) 0xFFFFF874) // (PIOC) Select B Register
// pPio->PIO_PDR = (periphAEnable | periphBEnable); // Set in Periph mode
    __writeMemory32(0xFFFF0000,0xFFFFF870,"Memory");
    __writeMemory32(0x00000000,0xFFFFF874,"Memory");
    __writeMemory32(0xFFFF0000,0xFFFFF804,"Memory");

//* psdrc->SDRAMC_CR =  AT91C_SDRAMC_NC_9  | AT91C_SDRAMC_NR_13 | AT91C_SDRAMC_CAS_3 |
//  AT91C_SDRAMC_NB_4_BANKS | AT91C_SDRAMC_DBW_32_BITS | AT91C_SDRAMC_TWR_2 | AT91C_SDRAMC_TRC_7 |
//  AT91C_SDRAMC_TRP_2 | AT91C_SDRAMC_TRCD_2 | AT91C_SDRAMC_TRAS_5 | AT91C_SDRAMC_TXSR_8 ;
    __writeMemory32(0x85227279,0xFFFFEA08,"Memory");
 __sleep(100);
//*	psdrc->SDRAMC_MR	= 0x00000002;		// Set PRCHG AL
    __writeMemory32(0x00000002,0xFFFFEA00,"Memory");
//*	*AT91C_SDRAM	= 0x00000000;			// Perform PRCHG
    __writeMemory32(0x00000000,0x20000000,"Memory");
 __sleep(100);


//*	psdrc->SDRAMC_MR	= AT91C_SDRAMC_MODE_RFSH_CMD;		// Set 1st CBR
      __writeMemory32(0x00000004,0xFFFFEA00,"Memory");

//*	*(AT91C_SDRAM+4)	= 0x00000001;	// Perform CBR
    __writeMemory32(0x00000001,0x20000010,"Memory");

//*	psdrc->SDRAMC_MR	= 0x00000004;		// Set 2 CBR
     __writeMemory32(0x00000004,0xFFFFEA00,"Memory");
//*	*(AT91C_SDRAM+8)	= 0x00000002;	// Perform CBR
     __writeMemory32(0x00000002,0x20000020,"Memory");

//*	psdrc->SDRAMC_MR	= AT91C_SDRAMC_MODE_RFSH_CMD;		// Set 3 CBR
      __writeMemory32(0x00000004,0xFFFFEA00,"Memory");
//*	*(AT91C_SDRAM+0xc)	= 0x00000003;	// Perform CBR
     __writeMemory32(0x00000003,0x20000030,"Memory");

//*	psdrc->SDRAMC_MR	= AT91C_SDRAMC_MODE_RFSH_CMD;		// Set 4 CBR
      __writeMemory32(0x00000004,0xFFFFEA00,"Memory");
//*	*(AT91C_SDRAM+0x10)	= 0x00000004;	// Perform CBR
     __writeMemory32(0x00000004,0x20000040,"Memory");

//*	psdrc->SDRAMC_MR	= AT91C_SDRAMC_MODE_RFSH_CMD;		// Set 5 CBR
      __writeMemory32(0x00000004,0xFFFFEA00,"Memory");
//*	*(AT91C_SDRAM+0x14)	= 0x00000005;	// Perform CBR
     __writeMemory32(0x00000005,0x20000050,"Memory");

//*	psdrc->SDRAMC_MR	= AT91C_SDRAMC_MODE_RFSH_CMD;		// Set 6 CBR
      __writeMemory32(0x00000004,0xFFFFEA00,"Memory");
//*	*(AT91C_SDRAM+0x18)	= 0x00000006;	// Perform CBR
     __writeMemory32(0x00000006,0x20000060,"Memory");

//*	psdrc->SDRAMC_MR	= AT91C_SDRAMC_MODE_RFSH_CMD;		// Set 7 CBR
      __writeMemory32(0x00000004,0xFFFFEA00,"Memory");	
//*	*(AT91C_SDRAM+0x1c)	= 0x00000007;	// Perform CBR
     __writeMemory32(0x00000007,0x20000070,"Memory");

//*	psdrc->SDRAMC_MR	= AT91C_SDRAMC_MODE_RFSH_CMD;		// Set 8 CBR
      __writeMemory32(0x00000004,0xFFFFEA00,"Memory");
//*	*(AT91C_SDRAM+0x20)	= 0x00000008;	// Perform CBR
     __writeMemory32(0x00000008,0x20000080,"Memory");

//*	psdrc->SDRAMC_MR	= AT91C_SDRAMC_MODE_LMR_CMD;		// Set LMR operation
      __writeMemory32(0x00000003,0xFFFFEA00,"Memory");
//*	*(AT91C_SDRAM+0x24)	= 0xcafedede;		// Perform LMR burst=1, lat=2
     __writeMemory32(0xCAFEDEDE,0x20000090,"Memory");

//*	psdrc->SDRAMC_TR	= (AT91C_MASTER_CLOCK * 7)/1000000;				// Set Refresh Timer 390 for 25MHz (TR= 15.6 * F )
//									               // (F : system clock freq. MHz

      __writeMemory32(0x000002B9,0xFFFFEA04,"Memory");

//*	psdrc->SDRAMC_MR	= AT91C_SDRAMC_MODE_NORMAL_CMD;		// Set Normal mode
      __writeMemory32(0x00000000,0xFFFFEA00,"Memory");

//*	*AT91C_SDRAM	= 0x00000000;	// Perform Normal mode
      __writeMemory32(0x00000000,0x20000000,"Memory");
   __message "------------------------------- SDRAM Done at 100 MHz -------------------------------";

}

/*********************************************************************
*
*       _MapRAMAt0()
* Function description
* Remap RAM at 0
*/
_MapRAMAt0()
{
// AT91C_MATRIX_MRCR ((AT91_REG *) 	0xFFFFEF00) // (MATRIX)  Master Remp Control Register
    __mac_i=__readMemory32(0xFFFFEF00,"Memory");
    __message "----- AT91C_MATRIX_MRCR  : 0x",__mac_i:%X;

    if ( ((__mac_i & 0x01) == 0) || ((__mac_i & 0x02) == 0)){
        __message "------------------------------- The Remap is NOT & REMAP ----------------------------";
        __writeMemory32(0x00000003,0xFFFFEF00,"Memory");
        __mac_i=__readMemory32(0xFFFFEF00,"Memory");
        __message "----- AT91C_MATRIX_MRCR  : 0x",__mac_i:%X;
    } else {
        __message "------------------------------- The Remap is done -----------------------------------";
    }
}


/*********************************************************************
*
*       __PllSetting()
* Function description
*   Initializes the PMC.
*   1. Enable the Main Oscillator
*   2. Configure PLL
*   3. Switch Master
*/
__PllSetting()
{
     if ((__readMemory32(0xFFFFFC30,"Memory")&0x3) != 0 ) {
//* Disable all PMC interrupt ( $$ JPP)
//* AT91C_PMC_IDR   ((AT91_REG *) 0xFFFFFC64) //(PMC) Interrupt Disable Register
//*    pPmc->PMC_IDR = 0xFFFFFFFF;
    __writeMemory32(0xFFFFFFFF,0xFFFFFC64,"Memory");
//* AT91C_PMC_PCDR  ((AT91_REG *) 0xFFFFFC14) //(PMC) Peripheral Clock Disable Register
    __writeMemory32(0xFFFFFFFF,0xFFFFFC14,"Memory");
// Disable all clock only Processor clock is enabled.
    __writeMemory32(0xFFFFFFFE,0xFFFFFC04,"Memory");

// AT91C_PMC_MCKR  ((AT91_REG *) 	0xFFFFFC30) // (PMC) Master Clock Register
    __writeMemory32(0x00000001,0xFFFFFC30,"Memory");
    __sleep(10000);

// write reset value to PLLA and PLLB
// AT91C_PMC_PLLAR ((AT91_REG *) 	0xFFFFFC28) // (PMC) PLL A Register
    __writeMemory32(0x00003F00,0xFFFFFC28,"Memory");

// AT91C_PMC_PLLBR ((AT91_REG *) 	0xFFFFFC2C) // (PMC) PLL B Register
    __writeMemory32(0x00003F00,0xFFFFFC2C,"Memory");
    __sleep(10000);

   __message "------------------------------- PLL  Enable -----------------------------------------";
   } else {
   __message " ********* Core in SLOW CLOCK mode ********* "; }
}


/*********************************************************************
*
*       __PllSetting100MHz()
* Function description
*   Set core at 200 MHz and MCK at 100 MHz 
*/
__PllSetting100MHz()
{

   __message "------------------------------- PLL Set at 100 MHz ----------------------------------";

//* pPmc->PMC_MOR = (( AT91C_CKGR_OSCOUNT & (0x40 <<8) | AT91C_CKGR_MOSCEN ));
    __writeMemory32(0x00004001,0xFFFFFC20,"Memory");
    __sleep(10000);
// AT91C_PMC_MCKR  ((AT91_REG *) 	0xFFFFFC30) // (PMC) Master Clock Register
    __writeMemory32(0x00000001,0xFFFFFC30,"Memory");
    __sleep(10000);
//*   AT91C_BASE_CKGR->CKGR_PLLAR = (AT91C_CKGR_SRCA | ((96 << 16) & AT91C_CKGR_MULA) | 
//    (AT91C_CKGR_PLLACOUNT | (AT91C_CKGR_OUTA_0 | (9);
    __writeMemory32(0x2060BF09,0xFFFFFC28,"Memory");
    __sleep(10000);
//*   AT91C_BASE_PMC->PMC_MCKR =  AT91C_PMC_CSS_PLLA_CLK | AT91C_PMC_PRES_CLK | AT91C_PMC_MDIV_2;;
    __writeMemory32(0x00000102,0xFFFFFC30,"Memory");
     __sleep(10000);

}