lpc2129_paypass_ttal1_functions.c

读RF卡的源代码

	}

}  


//-----------------------------------------------------------------------------
// Function name : GetPowerTwo
//-----------------------------------------------------------------------------
// Description : This function get 2 raised to power "p_lTimeout"
//
// IN       :   p_lTimeout : power value
// OUT      :   result of operation -
// RETURN   :   - none -
// Notes    :   This function
//-----------------------------------------------------------------------------
long GetPowerTwo(long p_lTimeout)
{
long Result,i,temp=2;
if(p_lTimeout==0) {return 1;}
if(p_lTimeout==1) {return 2;}
for(i=1;i<p_lTimeout;i++)
{
Result=temp*2;
temp=Result;
}
return Result;
}

//-----------------------------------------------------------------------------
// Function : v_fnDefineTimeout(unsigned char p_bTimeout)
//-----------------------------------------------------------------------------
// Description : Define TMR0 initialization (Set the timeout value into Timer 0 Matching register)
//
// IN       :   p_bTimeOut     : 	If p_bTimeOut <0E,  Timeout will be set according to :
//									0x00  TimeOut = 302祍
//									0x01  TimeOut = 604祍
//									0x02  TimeOut = 1,24ms
//									0x03  TimeOut = 2,42ms
//									0x04  ...etc...
//
//									If p_bTimeOut >=0E,  TimeOut= p_bTimeOut(a value in 祍)
//
// OUT      :   - none -
//
// RETURN   :   - none -
//
// Notes    :   Here Timer 0 of the LPC2129 is used
//				-This function set the Timer 0 Matching Register value of the LP2129 as the time out value :
//					-If p_lTimeout<0x0E ---> "Timer 0 Matching register value" = (Timer value of 1祍)*pow(2,p_lTimeout)
//					-If p_lTimeout>=0x0E ---> "Timer 0 Matching register value" = p_lTimeout(in 祍)
//				-A value of 530 祍 is added at each timeout definition to concider 
//				 communication timings between MCU and Picoread (only if p_lTimeout<0x0E)
//-----------------------------------------------------------------------------
void v_fnDefineTimeout(unsigned long p_lTimeout)
{
	//extern double pow(double,double);
	unsigned long l_lTimeout=0x0FFF;  



	if(p_lTimeout<=0x0E) 
	{		
	
	// 0x3FF as been defined according to 13.56MHz Oscillator  and should correspond to 302祍 for each PLL settings     
	l_lTimeout=ONE_U_SECOND*0x12E*GetPowerTwo(p_lTimeout); 
	
	//Add Offset of 530祍		
	
	// 0x706 as been defined according to 13.56MHz Oscillator  and should correspond to 530祍 for each PLL settings 
	l_lTimeout+=ONE_U_SECOND*0x212;     // Process TimeOut according to XTAL and PLL settings
	

	}else
	{	   																 	 
			l_lTimeout =(unsigned long)(p_lTimeout * ONE_U_SECOND);			
			
	}



	//STOP TIMER0
	T0TCR = (unsigned long)0x02;                                   // Timer0 Disable
	T0TC  = (unsigned long)0x00000000;								// Reset TC  
	T0MCR = (unsigned long)0x00000001;                             // Interrupt on MR0 and reset TC on match
	T0MR0 = (unsigned long)l_lTimeout;                         	// TC Init //ASSIGN TIME OUT 	 
	T0IR  = (unsigned long)0x01;                            		// Clear interrupt flag
	T0PR  = TIMER_0_PRESCALER ;							// Prescale 0
}



//-----------------------------------------------------------------------------
// Function name : v_fnTimeOutStart
//-----------------------------------------------------------------------------
// Description : This function starts the TIMER0.-->  Start Timeout Timer.
//
// IN       :   - none -
// OUT      :   - none -
// RETURN   :   - none -
// Notes    :   This function use the timer 0 of the LP2129
//				This function is used in association with v_fnDefineTimeout function
//-----------------------------------------------------------------------------
void v_fnTimeOutStart()
{
  //START TIMER0
   T0TCR = 1;

}


//-----------------------------------------------------------------------------
// Function name : v_fnConfigPorts
//-----------------------------------------------------------------------------
// Description : This function initialize IO mode and state, peripherals, ....
//
// IN       :   - none -
// OUT      :   - none -
// RETURN   :   - none -
// Notes    :   - none -
//-----------------------------------------------------------------------------
void v_fnInitRegsAndPorts()
{	 

   	VPBDIV=0x01;  			// PCLK= CCLK/4
		//
//	
	MAMCR=0x2;				 //MAM Control Register : Fully Enabled
	MAMTIM=0x4;				 //MAM Timing : 4 clock cycles
	/* Init PLL */
	//XTAL @ 13.56 MHz
/*-------HERE IS THE CODE THAT AS TO BE MODIFIED ACCORDING TO THE TARGET AND USER NEEDS-------  */
	PLLCFG=0x23;  // PLL x4 div 1 	  

	
	PLLCON=0x03; 			// PLL Enable 
	if ((PLLCON& 0xFF)==0) 	// If PLL x1 /1
	{
		PLLCFG=0x00;		// Disconnect PLL
	}
	PLLFEED=0xAA;			//Activate
	PLLFEED=0x55;			//And connect PLL
	while((PLLSTAT & 0x0400)== 0x0000);  // Wait PLL to Lock
	


	//DEFINE IO MODES
									// initialize the serial interface   
	PINSEL0 = 0x00050005;           // Enable RxD0 and TxD0   Enable RxD1 and TxD1                   
									

	
									
	/*Choosen UART is UART0 for the Console*/  
	// UART0 Setting
	U0LCR = 0x83;                   // 8 bits, no Parity, 1 Stop bit            
	/*For 9600 baud rate */
//	U0FDR=0x10;
	switch(VPBDIV)
	{
	  case 0x00: APBDivider=4; break;
	  case 0x01: APBDivider=1; break;
	  case 0x02: APBDivider=2; break; 
	}

	U0DLM = 0x01;  
	
	U0DLL = 352;
	//13.56M *(PLL MSEL+1)/(PLL PSEL+1) /4(Peripheral Prescaler) /16(Baud Rate Generator Divider) / U1DLL = 9600 (approx)    for a 13.56MHz VPB Clock         
	                   // DLAB = 0                                 
	U0LCR = 0x03;                   // DLAB = 0
	//Initialize GPIO PORT
	//Initialize GPIO PORT
	IODIR0 = CS_MASK | SCK_MASK | SDO_MASK ;//| DEBUGPIN_MASK | DEBUGPIN2_MASK ;
		 				 		  //P0.10 Output	 SDO 礐
								  //P0.11 Input	 	 SDI 礐
								  //P0.12 Output	 SCK 礐
								  //P0.13 Output	 CS 礐
								  
								  //P0.8 Output      DEBUG Pin
								  //P0.16 Output     DEBUG Pin 2
	IOSET0 = SDO_MASK ;     	  	  //P0.10 @1  	 	 Set SDO,SSEL0,READY at 1  others to 0
	//IOCLR0 = DEBUGPIN2_MASK;

//------------------------------------------------------------------------------------
//************************************************************************************
//      HERE ADD IO SETTINGS ACCORDING TO YOUR BOARD DESIGN, AND YOUR NEEDS
//************************************************************************************
//------------------------------------------------------------------------------------
	
}

//-----------------------------------------------------------------------------
// Function name : _getkey
//-----------------------------------------------------------------------------
// Description : This function receive a byte from UART0 RBR register
//
// IN       :   - none -
// OUT      :   - none -
// RETURN   :   - byte value -
// Notes    :   - none -
//-----------------------------------------------------------------------------
int _getkey (void)  
{                    /* Read character from Serial Port   */

  while (!(U0LSR & 0x01));

  return (U0RBR);
}


//-----------------------------------------------------------------------------
// Function name : putchar
//-----------------------------------------------------------------------------
// Description : This function send a byte from UART0 THR register
//
// IN       :   - byte to send -
// OUT      :   - none -
// RETURN   :   - byte sent -
// Notes    :   - none -
//-----------------------------------------------------------------------------
int putchar (int ch)  
{              // Write character to Serial Port

  if (ch == '\n')  
  {                 // expand LF into CR + LF
    while (!(U0LSR & 0x20));
    U0THR = '\r';                    // output CR
  }
  while (!(U0LSR & 0x20)); 

  return (U0THR = ch);
}