lpc2468_flash.mac

嵌入式的tcpip协议栈

execUserPreload()
{
    __hw_reset(0);
    __writeMemory32(0x00000001, 0xE01FC040, "Memory"); // MEMMAP = 1;
}
execUserFlashInit()
{
   __message "execUserFlashInit called";
   __hwReset(0);
      // Disable the PLL.
   __writeMemory32(0x00000000, 0xE01FC080, "Memory"); // PLLCON = 0
  // Qualify the PLL change.
    __writeMemory32(0x000000AA, 0xE01FC08C, "Memory"); // PLLFEED = 0xAA
    __writeMemory32(0x00000055, 0xE01FC08C, "Memory"); // PLLFEED = 0x55

  // Enable main clock (LPC23xx only).
    __writeMemory32(0x00000020, 0xE01FC1A0, "Memory"); // SCS.OSCEN = 1

    __sleep(50000); // Give the oscillator some startup time (50 ms)
    
  // Switch to main clock instead of internal RC for stable JTAG auto-speed 
    __writeMemory32(0x00000001, 0xE01FC10C, "Memory"); // CLKSRCSEL = 1
   
    __writeMemory32(0x0000000B, 0xE01FC084, "Memory"); // PLLCFG = 0xB  
  
 // Qualify the PLL change.
    __writeMemory32(0x000000AA, 0xE01FC08C, "Memory"); // PLLFEED = 0xAA
    __writeMemory32(0x00000055, 0xE01FC08C, "Memory"); // PLLFEED = 0x55
     // Enable the PLL.
   __writeMemory32(0x00000001, 0xE01FC080, "Memory"); // PLLCON = 1
  // Qualify the PLL change.
    __writeMemory32(0x000000AA, 0xE01FC08C, "Memory"); // PLLFEED = 0xAA
    __writeMemory32(0x00000055, 0xE01FC08C, "Memory"); // PLLFEED = 0x55
  //  CCLKCFG = CCLKDivValue;	/* Set clock divider */
    __writeMemory32(0x00000005, 0xE01FC104, "Memory"); // CCLKCFG = 5
    
     __sleep(50000); // Give the oscillator some startup time (50 ms)
     
  // Enable & Connect the PLL 
    __writeMemory32(0x00000003, 0xE01FC080, "Memory"); // PLLCON = 3  
  // Qualify the PLL change.
    __writeMemory32(0x000000AA, 0xE01FC08C, "Memory"); // PLLFEED = 0xAA
    __writeMemory32(0x00000055, 0xE01FC08C, "Memory"); // PLLFEED = 0x55
    
    __writeMemory32(0x00000001, 0xE01FC040, "Memory"); // MEMMAP = 1;

}