main.c

在串口上PPP拨号上网的源程序(实现PPP协议栈)

#include <iom128v.h>
#include <stdlib.h>
#include <string.h>
#include "PPP.h"
#include "UART.h"
#define xtal 7372800

void modem (void);
void delay_1ms(void);
void delay_ms(unsigned int n );

BYTE UART_BUFFER[PPP_BUFFER_SIZE+3];
extern BYTE *ptrBUFFER=UART_BUFFER;
static WORD MRU=PPP_BUFFER_SIZE;
extern BYTE PPPStatus;
extern UART_ptr;
static WORD j=0;
#pragma interrupt_handler uart_inter:31
void uart_inter(void)
{
static BYTE i=0;
UCSR1B&=~(1<<RXCIE1);
  i=getchar();
  	if(j>(PPP_BUFFER_SIZE+3)) 
	 {
	 j=0;
	 }
		 UART_BUFFER[j]=i;
		 j++;
UCSR1B|=(1<<RXCIE1);
}

void main (void)
{
WORD i;
uart_init();
PPPInit();
modem ();
for(i=0;i<(PPP_BUFFER_SIZE+3);i++)
{
UART_BUFFER[i]='\0';
}
j=0;
LCPREQPacket(MRU);

while(1)
{
if(UART_BUFFER[UART_ptr]!='\0')
{
ProcPPPReceive ();
}
PPPEntry();
}
}



void modem (void)
{
 BYTE k=1;
 while(k)
 {
  putstr("CLIENT");
  delay_ms(100);
  if(strstr(UART_BUFFER,"CLIENTSERVER") != NULL)
  {
   k=0;
  }
 } 
}

void delay_1ms(void)
{ unsigned int i;
 for(i=1;i<(unsigned int)(xtal*143-2);i++);
}
void delay_ms(unsigned int n )
{
 unsigned int i=0;
   while(i<n)
   {delay_1ms();
    i++;
   }
}