eppio.h

基于并口的波形发生器

#ifndef   EPPIO_H
#define   EPPIO_H

class EPPIO
{
public:
	EPPIO(short int BaseAddress = 0x378) : BASE_ADDRESS(BaseAddress) {};
	void StartIO();
	void InitEPP();
	
	void WriteRam(char address, char data);
	void FalseReadRam(char address);
	int Init8253(int freqency); // a two byte frequency can load to 8253
                                 // should  return 0 if the freqency is big than two byte
                                 // that is 65535
	void StartGenWave();

	short int BASE_ADDRESS; // base address of parallel port
	                        //base+2: SPP control Port
	                        //base+3 : EPP Address Port
	                        //base+4:  EPP Data  Port   

public:
	void EPP_WriteData(char data);
	char EPP_ReadData();
	void EPP_WriteAddress(char address);
	void SPP_WriteData(char data);
	
	
};

#endif