main.c

一個使用PIC16F877解GPS訊號的範例

#define	PIC_CLK 8000000 //change this to 3.6864, 4, 16 or 20MHz

#define  MCU 877

#include	<pic.h>
//#include	<pic1687x.h>
//#include	<conio.h>
//#include	<stdlib.h>
//#include 	<stdio.h>
//#include	<ctype.h>

#include	"always.h"
#include	"delay.h"
#include 	"main.h"
#include	"serial.h"
#include 	"GPS.H"

//include C files
#include	"delay.c"
#include 	"GPS.C"
#include	"TRW24G.c"
#include	"serial.c"

#define SW1		RB7
#define SW2		RE2

#define LED1	RA5
#define LED2	RA4

bit Mode,Sw1On,Sw2On;
//=========================================================================================
#if defined(_16F887) || defined(_16F877) || defined(_16F873) || defined(_16F874) || defined(_16C76)
	__CONFIG( WDTDIS & HS & UNPROTECT & PWRTEN & BOREN & LVPDIS & WRTDIS & DEBUGDIS &
UNPROTECT);

#else
	#error Must be compiled for 16F87x, MPLAB-ICD or 16C76
#endif


//=========================================================================================
//bank1 unsigned char RX_BUF[25];
const unsigned char HexToAsc_Table[]={
	'0','1','2','3','4','5','6','7','8','9',
	'A','B','C','D','E','F'};

//=========================================================================================
//=========================================================================================
//=========================================================================================
/* interrupt service routine*/
//-----------------------------------------------------------------------------------------
void interrupt isr(void)
{    
	unsigned char c;
	if(RCIF)
    	{
    		c=RCREG;
    		if(OERR == 0 )			// 无溢出错误
			{ 	
	    		GPS_Decode(c);
		  	}
			else
			{
				CREN = 0;
				asm("nop");
				CREN = 1;
			}
		}
	else if(TMR1IF)
		{
			TMR1IF=0;
			ReportTime++;
			if(!SW1)	
				Sw1On=1;
			else 	
				{
					if(Sw1On)
					{
						Mode=1;
						LED1=1;
						LED2=0;
						Sw1On=0;
					}
				}	
			
			if(!SW2)	
				Sw2On=1;
			else 
				{	
					if(Sw2On)
					{
						Mode=0;
						LED1=0;
						LED2=1;
						Sw2On=0;
					}
				}	
			//ADON=1;	
			KeyStatus=PORTB&0x7c;
			if(Mode) 
				KeyStatus |= 0x80;
			
		}
	else if(ADIF)
		{
			ADIF =0;
			VR_Value=ADRESH;
			ADGO=1;
		}
			
			
}
//-----------------------------------------------------------------------------------------
/* interrupt service routine*/
//=========================================================================================

//=========================================================================================
//void initial(void)
//-----------------------------------------------------------------------------------------
void mcu_initial(void)
{
	RP0=1;				//choose bank 1
	GIE=0;				//disable all interrupt
	OPTION=0x3f;		//Prescaler select1:128 and assigned to WDT

	INTCON=0; 			//GIE and PEIE disable;TO and INT enable;IntFlag cleared
    PIE1=0;   			//TMER2中断,异步串行接收中断
    PIR1=0;
    PIR2=0;
						//Set Port
	ANSELH=0;			//PORTB = I/O						
	
	PORTA = 0xcf;
	PORTB = 0xff;
	PORTC = 0xb0;
	PORTD = 0xff;
	PORTE = 0xfe;
	TRISA = 0xcf;     	//
    TRISB = 0xff;			//PORTB.all input 
    TRISC = 0xb0;			//
    TRISD = 0xff;			//RD all output
    TRISE = 0xfe;			//RE all output
    
//
	T1CON= 0x1;
//	TMR1IE=1;			//enable TIME1 interrupt
						//INIT_AD:
	ADCON1=0x09;		//ADFM=0