isr.c

能用51读写U盘...创建文件格式...能自由创建文件.删除.读写

#include "common.h"
#include "HAL.H"
#include "SL811.H"
#include "HPI.H"
#include "HPI32.H"

extern FLAGS bdata bFlags;
extern unsigned char xdata UARTBUF[UARTBUF_LENGTH];
extern Command_Def xdata Command;			
//////////////////////////////////////////
void ISR_COMM(void) interrupt 4
{
	unsigned char *pBuf=(unsigned char *)&Command;  //Low Bit at Head
	unsigned long xdata cnt;
	
	MCU_LED3=0;	
	if(RI==0)
		{
		MCU_LED3=1;
		return;
		}

	for(cnt=0;cnt<37;cnt++)
	{		
		while(!RI);			
		*(pBuf+cnt)=SBUF;
		RI=0;
	}
	
	/////// data phase /////////////////////
	if(Command.CLass==0x04||Command.CLass==0x05||Command.CLass==0x09) ///GreatFile/GreatDir/WriteFile
		{
		if(Command.len>MAX_WRITE_LENGTH)
		{
		Command.CLass=0xff;
		bFlags.bits.bUartInDone=1;
		MCU_LED3=1;
		return;
		}
		for(cnt=0;cnt<Command.len;cnt++)
			{
			while(!RI);			
			UARTBUF[cnt]=SBUF;
			RI=0;
			}
		}	
	//////////////////////////
	bFlags.bits.bUartInDone=1;
	RI=0;	
	MCU_LED3=1;
}

void ISR_INT0(void) interrupt 0
{
	DISABLE_INTERRUPTS;	
	SL811Write(IntStatus,INT_CLEAR);
	ENABLE_INTERRUPTS;
}