main.c

中青公司的磁条读卡器的源码

#include "System.h"
#include "MagneticRead.h"


void InitialIO(void);
void InitialSystem(void);

void main(void)
{
	unsigned char i;

	InitialIO();
	InitialSystem();

	while(1)
	{
		//ReadMagCard
		if( EA && !ioCLD )
		{
			while( !ioCLD )
			{}

			EA = 0;

			// Check Track Data
			// 0xF1 : LRC Error
			// 0xF2 : Parity Error
			// 0xF3 : No End Code
			// 0xF4 : No Start Code
			// 0xF5 : No Data
			if( fTrack1HaveData ) Track1Check();
			else nReadTrack1Len = READ_NODATA;
			
			if( fTrack2HaveData ) Track2Check();
			else nReadTrack2Len = READ_NODATA;
			
			if( fTrack3HaveData ) Track3Check();
			else nReadTrack3Len = READ_NODATA;

			// Track1 Data Have Error
			if( ( nReadTrack1Len > 0xF0 ) || ( nReadTrack1Len == 0 ) )
			{
				// Clear Track1 Buffer
				for(i=0;i<READ_TRACK1BUFSIZE;i++)
					chTrack1Buffer[i] = 0x00;
			}

			// Track2 Data Have Error
			if( ( nReadTrack2Len > 0xF0 ) || ( nReadTrack2Len == 0 ) )
			{
				// Clear Track2 Buffer
				for(i=0;i<READ_TRACK2BUFSIZE;i++)
					chTrack2Buffer[i] = 0x00;
			}

			// Track3 Data Have Error
			if( ( nReadTrack3Len > 0xF0 ) || ( nReadTrack3Len == 0 ) )
			{
				// Clear Track3 Buffer
				for(i=0;i<READ_TRACK3BUFSIZE;i++)
					chTrack3Buffer[i] = 0x00;
			}
			
			EA = 1;

			// Initial Magnetic Read Status...
			ReadyToRead();
		}
	}
}


void InitialIO(void)
{
	P0 = 0xFF;
	P1 = 0xFF;
	P2 = 0xFF;
	P3 = 0xFF;
	P4 = 0xFF;
}

void InitialSystem(void)
{
//Ext IO1 setting 
	IT1=1;
	EX1=1;				//External Int1 Interrupt Disable, here is used for Track2 recieve data

//Timer setting
	TMOD=0x66;			// T0 = NGate Control & Counter Mode & Mode2(8bit)
						// T1 = NGate Control & Timer Mode & Mode1
//Timer0 setting (Ext Port)
	TH0=0xFF;
	TL0=0xFF;
	TR0=1;
	ET0=1;				//Timer 0 Interrupt Disable, here is used for Track1 recieve data

//Timer1 setting (Ext Port)
 	TH1=0xFF;
	TL1=0xFF;
	TR1=1;			
	ET1=1;				//Timer 1 Interrupt Disable, here is used for Track3 recieve data

	EA = 1;
}