sam7_flash.mac

这是用IAR开发的AT91SAM7X256的CAN测试代码

//  ----------------------------------------------------------------------------
//          ATMEL Microcontroller Software Support  -  ROUSSET  -
//  ----------------------------------------------------------------------------
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//  ----------------------------------------------------------------------------
//  File Name           : SAM7_FLASH.mac
//  Object              : Generic Macro File for IAR
//  1.0 17/Aug/05 FBr   : Creation
//  ----------------------------------------------------------------------------

/*********************************************************************
*
*       _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()
* 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 "Enable Main Oscillator";
    __writeMemory32(0x00000601,0xFFFFFc20,"Memory");    // MOSC
    while( !(__readMemory32(0xFFFFFc68,"Memory") & 0x1)  );

    __message "Set PLL to 96MHz";
    __writeMemory32(0x10191c05,0xFFFFFc2c,"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)  );
}

/*********************************************************************
*
*       execUserReset() : JTAG set initially to Full Speed
*/
execUserReset() {
    __message "execUserReset()";
    __emulatorSpeed(30000);             // Set JTAG speed to 30kHz to make a hardware reset
    __hwReset(0);                       // Hardware Reset: CPU is automatically halted after the reset (JTAG is already configured to 32kHz)
    _InitPLL();                         // Allow to debug at JTAG Full Speed
    _InitRSTC();                        // Enable User Reset to allow execUserReset() execution
    __emulatorSpeed(0);                 // Set JTAG speed to full speed
}