misc.c

C8051F320+Nrf24L01无线模块的实现

#include "typedef.h"
#include "misc.h"

/***************************************************************************
Declaration : delay(u16 dat)

Description : delay (dat) uS

Notice : u16 is 16Bit,Maxim Value = 65535
***************************************************************************/
void delay(u16 dat)
{
//	for(i=0; i<dat; i++)
	while(--dat)
	{
		_nop_();
		_nop_();
		_nop_();
		_nop_();
//		_nop_();
//		_nop_();
	}
}
	
/***************************************************************************
Declaration : void init_mcu(void)

Description : Initializes the MCU
***************************************************************************/
/*void init_mcu(void)
{
   	P3MDIN		= 0xff;
	P3MDOUT		= ~IO_INIT_B;
   	P3 			= 0xff;

	XBR1 = 0x40;						// Enable Crossbar

	TR0 = 0;
	TR1 = 0;
	TR2 = 0;
	EX0 = 0;
	EX1 = 0;
}
	  */
//-----------------------------------------------------------------------------
// SYSCLK_Init
//-----------------------------------------------------------------------------
//
// Return Value : None
// Parameters   : None
//
// This function initializes the system clock and USB clock.
//
//-----------------------------------------------------------------------------
void SYSCLK_Init (void)
{
   OSCICN |= 0x03;     		                // Configure internal oscillator for
                            	           // its maximum frequency

   CLKMUL = 0x00;   	           	       // Select internal oscillator as
                                    	   // input to clock multiplier

   CLKMUL |= 0x80;                    		// Enable clock multiplier
   delay(1000);
   CLKMUL |= 0xC0;                     		// Initialize the clock multiplier
//   CLKMUL |= 0x20;
   while(!(CLKMUL & 0x20));            		// Wait for multiplier to lock

   CLKSEL |= USB_4X_CLOCK;             		// Select USB clock
   CLKSEL |= SYS_4X_DIV_2;             		// Select SYSCLK as Clock Multiplier/2
}
/*The produce for configuring and enabling the 4x clock Multiplier is as Follow:
1.Reset the Multiplier by writting 0x00 to register CLKMUL
2.Select the Multiplier input source via the Multiplier bits
3.Enable the Multiplier with the MULEN bit(MUCLK|=0x80)
4.Delay for > 5 us
5.Initialize the Multiplier with the MULINIT bits(CLKMUL|=0xC0)
6.Poll for MULDRY>='1'   
																	Add By lsy  */