testmcu.c

RFID 使用C8051F020和周立功RC500开发模块

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