www.pudn.com > RC500_RFID.rar > testmcu.c

void SYSCLK_Init (void) 
{ 
   int i;                              // delay counter 
 
   OSCXCN = 0x67;                      // start external oscillator with 
                                       // 22.1184MHz crystal 
 
   for (i=0; i < 256; i++) ;           // XTLVLD blanking interval (>1ms) 
 
   while (!(OSCXCN & 0x80)) ;          // Wait for crystal osc. to settle 
 
   OSCICN = 0x88;                      // select external oscillator as SYSCLK 
                                       // source and enable missing clock 
                                       // detector 
} 
 
	WDTCN = 0x07;	// Watchdog Timer Control Register 
    WDTCN = 0xDE;   // Disable WDT 
    WDTCN = 0xAD; 
	XBR0 = 0x04;	// XBAR0: Initial Reset Value 
	XBR1 = 0x2A;	// XBAR1: Initial Reset Value 
	XBR2 = 0x44;	// XBAR2: Initial Reset Value 
 
	 P0MDOUT = 0x05; // Output configuration for P0  
    P1MDOUT = 0x00; // Output configuration for P1  
    P2MDOUT = 0x00; // Output configuration for P2  
    P3MDOUT = 0x00; // Output configuration for P3  
    P74OUT = 0x00;  // Output configuration for P4-7 
 
    P1MDIN = 0xFF;  // Input configuration for P1 
 
// View port pinout 
 
		// The current Crossbar configuration results in the  
		// following port pinout assignment: 
		// Port 0 
		// P0.0 = UART TX0        (Push-Pull Output) 
		// P0.1 = UART RX0        (Open-Drain Output/Input) 
		// P0.2 = UART TX1        (Push-Pull Output) 
		// P0.3 = UART RX1        (Open-Drain Output/Input) 
		// P0.4 = T0              (Open-Drain Output/Input) 
		// P0.5 = T1              (Open-Drain Output/Input) 
		// P0.6 = T2              (Open-Drain Output/Input) 
		// P0.7 = GP I/O          (Open-Drain Output/Input) 
 
 
 
		OSCXCN = 0x01;	// EXTERNAL Oscillator Control Register	 
 
	OSCICN = 0x04;	// Internal Oscillator Control Register