main.c

芯科rf资料

/*
** ============================================================================
**
** FILE
**  main.c
**
** DESCRIPTION
**  This is the main file of the project.	    
**
** CREATED
**  Silicon Laboratories Hungary Ltd
**
** COPYRIGHT
**  Copyright 2008 Silicon Laboratories, Inc.  
**	http://www.silabs.com
**
** ============================================================================
*/


							/* ======================================================= *
							 *						INCLUDE							   *
							 * ======================================================= */

						
#include "Si4421.h"
#include "S8051.h"
#include "uart.h"
#include "EZLink_Modem_cmd.h"
							/*========================================================== *
							 *						GLOBAL variables					 *
							 * ========================================================= */

xdata uint8 length,payload[MAX_PAYLOAD_LENGTH+1]; 					

extern idata uint8 BufChar;
extern idata uint8 o_ptr;
extern idata uint8 i_ptr;
xdata uint8 TxPacketPtr;
xdata uint8 uart_ch_sent;

xdata uint8 opmode;
xdata uint8 swit_30ms;
xdata uint8 rs232_timer;
xdata uint8 rs232_timeout;
								/* ============================================================ *
								 *						FUNCTION prototypes						* 
								 * ============================================================ */								
void Hw_Init(void);
INTERRUPT_PROTO (UART0_ISR, INTERRUPT_UART0);	
INTERRUPT_PROTO (TIMER2_ISR, INTERRUPT_TIMER2);
 								/* ============================================================ *
								 *							MAIN PROGRAM						* 
								 * ============================================================ */
void main(void)															
{	
	
	xdata uint8 str[10];
   	xdata uint8 i;
	
	BufChar = 0;
	i_ptr = 0;
	o_ptr = 0;
	opmode = 0;														//default mode(command mode)
	TxPacketPtr = 0;
		
	swit_30ms = 0;
  	rs232_timer = 0;
  	rs232_timeout = 33;                                          	// RS232 rx timeout (1 s)  


	Hw_Init();	
	init_ezradio();													//initialize the IA4421 transceiver
	
	CMD_init();
	printAbout();
	ia4421_enable_rx();												//start receiving
	
	while(1)														//main loop
	{
	
		// Synchronized routines:
         //==========================================================
         //---- 30ms soft interrupt area:
        
		 while(swit_30ms)
         {
           	--swit_30ms;
        	if(rs232_timer && rs232_timer <= rs232_timeout) ++rs232_timer;         // increase the rx timer, if it is running
            if (CMD_PIN == 1)
		    {	
				opmode = 1;												//data mode
		    }
		    else
		    {
		 		opmode = 0;												//command mode
		    }
			   	
         }
      // NOT synchronized routines:
      //==========================================================
      	      		
        
		if (BufChar)												//if there is any char in the uart buffer
		{
			if (opmode == 0)										//command mode
			{
				CmdExec(ReadBuffer());								//call the commandinterpreter
			}
			else													//data mode
			{

				if(TxPacketPtr < MAX_PAYLOAD_LENGTH)
				{
					payload[TxPacketPtr++]= ReadBuffer();				//save the received byte
				}

				
			}
		}
	
		if( (TxPacketPtr >= MAX_PAYLOAD_LENGTH) || (payload[TxPacketPtr - 1] == RS232_EOP) || ( rs232_timer >= rs232_timeout))
		{	
				
					TR_LED = 1;
					ia4421_send_packet(TxPacketPtr, &payload[0]);		//send the packet
					rs232_timer = 0;
					TxPacketPtr = 0;
					ia4421_enable_rx();									//enable the receiver chain again
					TR_LED = 0;
					delay_ms(10);
		}
		
	
								/* ================================================== */
								/* 				Linktest button pressed				  */
								/* ================================================== */	


		/*PACET RECEIVING*/
        while(RF_NIRQ == 0)                            				//polling the nIRQ pin of the chip
        {
	        if(Receive_packet() == PACKET_RECEIVED)    				//if the whole packet has been received
            {	
				
				RC_LED = 1;											//packet received -> blink the RX LED	
														
				ia4421_get_received_payload(&length,payload);
			
			
				for(i=0;i<length;i++)								//print packet content 
					putchar(payload[i]);
				
				payload[9] = 0;															
				strcpy(str,"Link ??\r\n");
				RC_LED = 0;
				if(!strcmp(str,payload))							//checked the packet content	
				{
					TR_LED = 1;
					delay_ms(5);
					strcpy(&payload[0],"Link OK\r\n");
					ia4421_send_packet(9, &payload[0]);				//send ACK message
					TR_LED = 0;
				}
				
				
				ia4421_enable_rx();									//enable the receiver chain again	
				
             }
		
        }

		
		/*PACKET TRANSMISSION*/
		if (PB == 0)												//sending Linktest message if button pressed
		{	
			
			while( PB == 0 ); 										//wait for releasing the push button
			TR_LED = 1;
			delay_ms(10);
			strcpy(&payload[0],"Link ??\r\n");
			ia4421_send_packet(9, &payload[0]);						//send a PING packet
			TR_LED = 0;
			ia4421_enable_rx();										//enable receiver, wait for ACK
		}
	
	}
	
}


								/* ================================================ */
								/*						UART0 ISR					*/
								/* ================================================ */

INTERRUPT(UART0_ISR, INTERRUPT_UART0)
{

	if( RI0 == 1 )													//check RX interrupt
	{
		
		
		UartRxISR();												//call the UART RX interrupt handler
		RI0 = 0;													//clear IT Flag
	}

	if( TI0 == 1 ) 
	{
		uart_ch_sent = 1;
		TI0 = 0;
	} 
	
}

								/* ================================================ */
								/*						TIMER2 ISR					*/
								/* ================================================ */

INTERRUPT(TIMER2_ISR, INTERRUPT_TIMER2)
{
	++swit_30ms;  
	TF2H = 0;
}

/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  +
  + FUNCTION NAME:  void Hw_Init(void)
  +
  + DESCRIPTION:    This function configures the HW.
  +
  +	INPUT:			None
  +
  + RETURN:         None
  +
  + NOTES:          None
  +
  +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
void Hw_Init(void)
{
	DisableGlobalIt();
    /*Disable the Watchdog Timer*/
	PCA0MD &= ~0x40;                    
    PCA0MD = 0x00;

	
	/*Precision Internal Oscillator SYSCLK (24.5MHz)*/
	OSCICN    = 0x8F;
    FLSCL     = 0x40;
    CLKSEL    = 0x00;


	/*Initialize I/O ports*/
	P0MDIN    = 0xFF;					
    P1MDIN    = 0xFF;  
	P2MDIN	  = 0xFF;
	P0MDOUT   = 0x10;
	P1MDOUT   = 0x6D;						
    P2MDOUT   = 0x09;

	
	P0     	  |= 0xC3;                      //Set P0 inputs
	P1		  |= 0x12;						//Set P1 inputs
	P2		  |= 0x10;						//Set P2 inputs
			   
    SFRPAGE   = 0x0F;
	P0DRV	  = 0x10;	
    P1DRV     = 0x6D;
    P2DRV     = 0x09;

    SFRPAGE   = 0x00;
    XBR0      = 0x01;
    XBR1      = 0x40;
    XBR2      = 0x40;

	//Initialize SPI
	SetHwMasterSpi();
	//Initialize Uart
	UartInit();
	//Initialize Timer2
	Timer2Init();
						/*Blink the LEDs*/
	
	TR_LED = 1;
	delay_ms(5);
	RC_LED = 1;
	delay_ms(5);
	TR_LED = 0;
	delay_ms(5);
	RC_LED = 0;
	EnableGlobalIt();						// Enable global IT
	
}