hal.c

USB便携多道系统单片机固件程序.单片机固件程序采用CodeWarrior Development Studio for HC(S)08 Microcontrollers集成开发环境开发

//===================================================================//
//     Project Name : MOTOROLA-PDIUSBD12 USB-MCS CARD
//      Module Name : Master Firmware Program
//     Product Type : License
//      OS/Dev Tool : CodeWarrior Development Studio for HC(S)08 Microcontrollers
//  Original Author : Ming Zeng
//     Organization : Tsinghua University , DEP 
//    Original Date : Feb, 20, 2003
//             Addr : Tsinghua University, Beijing City
//              TEL : 
//            EMail : [e-mail]
//          Website : http://www.zming.net
//		  Copyright : Copyright ZMing.net, 2003
//         Comments : 
//                    
//			
//===================================================================//

#include "COMMON.H"
#include "HAL.H"
#include "USBD12.H"

void outportb(unsigned short nPort, unsigned char nVal)
{	
	DDRA = 0xff;//方向寄存器
	
	if (nPort)
		PTC |= 0x01;   //置A0为1
	else 		
		PTC &= 0xfe;   //置A0为0
	
	PTA = nVal;

	PTC &= 0xfd;   //模拟WR信号		//IC_D12_WR = 0;

	PTC |= 0x02;   //模拟WR信号		//IC_D12_WR = 1;
}

unsigned char inportb(unsigned short nPort)
{
	unsigned char nVal;
	
	DDRA = 0x00;//方向寄存器
	
	if (nPort)
		PTC |= 0x01;   //置A0为1
	else 		
		PTC &= 0xfe;   //置A0为0
	
	PTC &= 0xfb;   //模拟RD信号		//IC_D12_RD = 0;
	
	nVal = PTA;
	
	PTC |= 0x04;   //模拟RD信号		//IC_D12_RD = 1;

	return nVal;
}

void Delay(register unsigned char nFactor)
{
	unsigned char i;

	for(i=0; i<nFactor; i++)
		{
		asm {
			LDA #200
			__l_01: DBNZA  __l_01// 3cyc x 406.9ns x 197 +9000ns = 0,249ms  //fBus = 2.4576MHz
			LDA #200
			__l_02: DBNZA  __l_02
			}
		}

}

void DelayMs(register unsigned char nFactor)
{
	unsigned char i;

	for(i=0; i<nFactor; i++)
		Delay(2);
}