flashat91sam7x.mac

atm91sam7x系列arm的flashloader源码

// ---------------------------------------------------------
//   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 Name           : SAM7_RAM.mac
// Object              : Setup Macro File for IAR
//  1.0 17/Aug/05 FBr  : Creation
//  1.1 08/Sep/05 JPP  : Set some comment
// ---------------------------------------------------------

__var __mac_i;
/*********************************************************************
*
*       _MapRAMAt0()
*
* Function description
*   Maps RAM at 0.
*/
_MapRAMAt0(){
    __message "Changing mapping: RAM mapped to 0";
    __writeMemory32(0x00000001,0xFFFFFF00,"Memory");
}

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

/*********************************************************************
*
*       _InitFlash()
*
* Function description
*   Initializes the Flash time access (Memory controller).
*   Set Flash Waite sate Single Cycle Access at Up to 30 MHz,
*   if MCK = 47923200 I have 72 Cycle for 1 useconde (flied MC_FMR->FMCN)
*   if MCK = 47923200 I have 48 Cycle for Non Volatile Memory Bits
*   
*/
_InitFlash() {

	// if ((AT91C_BASE_MC->MC_FSR & AT91C_MC_GPNVM2) == AT91C_MC_GPNVM2 )
	if (__readMemory32(0xFFFFFF68,"Memory") & 0x400)
	{
	    __message " ---------------------------------------- GPNVM 2 is already Set";  

	} else {
	    __writeMemory32(0x00300100,0xFFFFFF60,"Memory");

//          AT91C_BASE_MC->MC_FCR = AT91C_MC_CORRECT_KEY | AT91C_MC_FCMD_SET_GP_NVM | (AT91C_MC_PAGEN & (gpnvm_bit << 8)) ;
            __writeMemory32(0x5A00020B,0xFFFFFF64,"Memory");

	    __message " ---------------------------------------- SET GPNVM 2 ";  
//        while ((AT91C_BASE_MC->MC_FSR & AT91C_MC_FRDY) != AT91C_MC_FRDY ) {};
          while( !(__readMemory32(0xFFFFFF68,"Memory") & 0x1)  );

	}

    __writeMemory32(0x00480100,0xFFFFFF60,"Memory");
}

/*********************************************************************
*
*       _InitPLL()
* Function description
*   Initializes the PMC.
*   1. Enable the Main Oscillator
*   2. Configure PLL to 96MHz
*   3. Switch Master Clock (MCK) on PLL/2 = 48MHz
*/
    _InitPLL() {

    __message "Set Main Oscillator";
    __writeMemory32(0x00004001,0xFFFFFc20,"Memory");    // MOSC
    while( !(__readMemory32(0xFFFFFc68,"Memory") & 0x1)  );

    __message "Set PLL to 96MHz";
    __writeMemory32(0x10483f0e,0xFFFFFc2c,"Memory");    // LOCK
    while( !(__readMemory32(0xFFFFFc68,"Memory") & 0x4)  );

    __message "Set Master Clock to 48MHz";
    __writeMemory32(0x00000004,0xFFFFFc30,"Memory");    // MCKRDY
    while( !(__readMemory32(0xFFFFFc68,"Memory") & 0x8)  );
    __writeMemory32(0x00000007,0xFFFFFc30,"Memory");    // MCKRDY
    while( !(__readMemory32(0xFFFFFc68,"Memory") & 0x8)  );
}

/*********************************************************************
*
*       execUserFlashInit() : JTAG set to 32kHz
*/
execUserFlashInit()
{
    __message " ---------------------------------------- FLASH Download V1.3";  
    __message " ---------------------------------------- 14/November/2005";  
    __hwReset(500);                     // Hardware Reset (JTAG is already configured to 32kHz)
    _InitPLL();                         // Allows to load Code at JTAG Full Speed
    _InitFlash();                       // Allows to Read Write Flash
    _MapRAMAt0();                       // Remap RAM to address 0

//*  Get the Chip ID (AT91C_DBGU_C1R & AT91C_DBGU_C2R
    __mac_i=__readMemory32(0xFFFFF240,"Memory");
    __message " ---------------------------------------- Chip ID   0x",__mac_i:%X;  
    __mac_i=__readMemory32(0xFFFFF244,"Memory");
    __message " ---------------------------------------- Extention 0x",__mac_i:%X;  
    __mac_i=__readMemory32(0xFFFFFF6C,"Memory");
    __message " ---------------------------------------- Flash Version 0x",__mac_i:%X;  

}

/*********************************************************************
*
*       execUserFlashReset() : JTAG set to Full Speed
*/
execUserFlashReset()
{
    __message "execUserFlashReset()";
    _InitRSTC();
}