贴上自己的代码，目前测试通过，但我感觉结构不是很好，希望和大家交流共同提高。
.H文件
#define ACKN -1 #define ACKY -2 #define RESEND -3 #define ONSENDNEXT -4 #define SENDDEL -5 #define SENDWTX -6 #define DONOTHING -12 #define BLOCK_MASK 0XC0 #define IBLOCK 0X00 #define RBLOCK 0X80 #define SBLOCK 0XC0 #define NACK_MASK 0X10 #define CID_MASK 0X08 #define BNUM_MASK 0X01 #define WTX_DEL_MASK 0X30 #define LINK_MASK 0X10 #define WTX 0X30 #define DELSECT 0X00
.c文件
unsigned char near CCID;
unsigned char near Frame_Data_Len_Card;
unsigned char near currentflag;
unsigned ];
unsigned char near lastframelen;
unsigned ],CardBuffer[];
unsigned short near PBufferLength,PBufferPoint,CardBufPoint,CardBufferLength;
bit cblock_num,CCid_En;
unsigned char AckN(void)
{
unsigned ];
buf[] = 0XA2|cblock_num;
buf[] = CCid_En?buf[]|];
buf[] = CCID;
WriteCardFifo(buf,);
SetRecvOrSend(START_SEND_AND_RECV);
// PutDatUart(buf, 2);
return OK;
}
unsigned char AckY(void)
{
unsigned ];
cblock_num=!cblock_num;
buf[] = 0XA2|cblock_num;
buf[] = CCid_En?buf[]|];
buf[] = CCID;
WriteCardFifo(buf,(unsigned ));
// PutDatUart(buf, 2);
return SetRecvOrSend(START_SEND_AND_RECV);
}
char CardRecvFrameProcess(unsigned char *tempbuf,unsigned char inlen)
{
unsigned short near len;
unsigned char near PCB;
unsigned char near Cid;
unsigned char near lastflag = currentflag;
len = inlen;
)
{
return DONOTHING;
}
PCB = tempbuf[];
Cid = PCB&CID_MASK;
)&&(CCID!=)&&(Cid==)) || ((CCid_En==)&&(Cid==))) return DONOTHING;
if((PCB&BLOCK_MASK) ==IBLOCK)//i-block
{
if(PCB&CID_MASK)//带CID时，长度应该不少于2字节
{
) return DONOTHING;
}
else //不带CID时长度不应少于1个字节
{
) return DONOTHING;
}
if((PCB&0X02)!=0X02) return DONOTHING;
currentflag = PCB & LINK_MASK;
if(currentflag)
{
if(lastflag)
{
- (unsigned char)CCid_En)>BUFFERLENGTH)
{
PBufferLength=;
PBufferPoint =;
return DONOTHING;
}
memcpy(&PBuffer[PBufferPoint],&tempbuf[+(unsigned -(unsigned char)CCid_En);
PBufferPoint = PBufferPoint + len - - (unsigned char)CCid_En;
PBufferLength = PBufferLength + len - - (unsigned char)CCid_En;
}
else
{
PBufferPoint = ;
PBufferLength = ;
memcpy(&PBuffer[PBufferPoint],&tempbuf[+(unsigned -(unsigned char)CCid_En);
PBufferPoint = PBufferPoint + len - - (unsigned char)CCid_En;
PBufferLength = PBufferLength + len - - (unsigned char)CCid_En;
}
return ACKY;
}
else
{
if(lastflag)
{
- (unsigned char)CCid_En)>BUFFERLENGTH)
{
PBufferLength=;
PBufferPoint =;
return DONOTHING;
}
memcpy(&PBuffer[PBufferPoint],&tempbuf[+(unsigned -(unsigned char)CCid_En);
PBufferPoint = PBufferPoint + len - - (unsigned char)CCid_En;
PBufferLength = PBufferLength + len - - (unsigned char)CCid_En;
}
else
{
PBufferPoint = ;
PBufferLength = ;
memcpy(&PBuffer[PBufferPoint],&tempbuf[+(unsigned -(unsigned char)CCid_En);
PBufferPoint = PBufferPoint + len - - (unsigned char)CCid_En;
PBufferLength = PBufferLength + len - - (unsigned char)CCid_En;
}
return FM_OK;
}
}
else if((PCB&BLOCK_MASK) ==RBLOCK) //rblock
{
if(PCB&CID_MASK)//带CID时，长度应该不少于2字节
{
) return DONOTHING;
}
else //不带CID时长度不应少于1个字节
{
) return DONOTHING;
}
if((PCB&0X40)==0X00) return DONOTHING;
if(PCB&NACK_MASK)
{
if((PCB&BNUM_MASK)!=cblock_num)
{
return ACKN;//表示重发NAK,因帧号不对
}
else
{
return RESEND; //表示重发上一帧
}
}
else //ack
{
if((PCB&BNUM_MASK)!=cblock_num)
{
return SENDNEXT; //表示继续发下一帧
}
else
{
return RESEND; //表示重发上一帧
}
}
}
else if((PCB&BLOCK_MASK) ==SBLOCK) //sblock
{
if((PCB&0X04)!=0X00) return DONOTHING;
if((PCB&WTX_DEL_MASK)==DESELECT)
{
if(PCB&CID_MASK)
{
if(len!=0x02) return DONOTHING;
else return SENDDEL;
}
else
{
if(len!=0x01) return DONOTHING;
else return SENDDEL;
}
}
else if((PCB&WTX_DEL_MASK)==WTX)
{
if(PCB&CID_MASK)
{
if(len!=0x03) return DONOTHING;
else return SENDWTX;
}
else
{
if(len!=0x02) return DONOTHING;
else return SENDWTX;
}
}
else
{
return DONOTHING;
}
}
else
{
return DONOTHING;
}
}
char CardCosInsProcess()
{
Timer0Delay(FIFTY_MINISECOND); //这个时间根据卡返回的ATS中的参数确定，默认为4.8ms，在定时器中断中发WTX,并禁止再次中断，停止定时器
EnableTimer0Int();
StopTimer0();
return OK;
}
char CardSendFrameProcess(char STA)
{
unsigned ];
unsigned char near len;
char near Sta=STA;
unsigned -(unsigned ;
//WTimeS = 0;
switch(Sta)
{
case ACKY:
AckY();
break;
case ACKN:
AckN();
break;
case RESEND:
memcpy(tempbuf,lastframe,lastframelen);
WriteCardFifo(tempbuf,lastframelen);
SetRecvOrSend(START_SEND_AND_RECV);
// PutDatUart(tempbuf,lastframelen);
break;
case ONSENDNEXT:
cblock_num = !cblock_num;
wtempfc[] = CCid_En?0X0A:0X02;
wtempfc[]= CardBufferLength>CardMLen?((tempbuf[] | ] | cblock_num);
wtempfc[] = CCID;
len = (CardBufferLength>(CardMLen))?CardMLen:CardBufferLength;
memcpy(&tempbuf[(unsigned ],&CardBuffer[CardBufPoint],len);
WriteCardFifo(tempbuf,(unsigned ));
SetRecvOrSend(START_SEND_AND_RECV);
// PutDatUart(tempbuf,(unsigned char)(len+((unsigned char)CCid_En)+1));
CardBufPoint = CardBufPoint + len;
CardBufferLength = CardBufferLength - len;
break;
case SENDDEL:
SDeselect();
SetCardIdle();
break;
case SENDWTX:
Timer0Delay(FIFTY_MINISECOND);
//这个时间根据卡返回的ATS中的参数确定，默认为4.8ms，在定时器中断中发WTX,并禁止再次中断，停止定时器
EnableTimer0Int();
break;
case GETDATA:
cblock_num= !cblock_num;
tempbuf[] = CCid_En?0X0A:0X02;
tempbuf[] = CardBufferLength>CardMLen?((tempbuf[] | ] | cblock_num)
tempbuf[] = CCID;
CardBufPoint = ;
len = (CardBufferLength>CardMLen)?CardMLen:CardBufferLength;
memcpy(&tempbuf[(unsigned ],&CardBuffer[CardBufPoint],len+(unsigned );
WriteCardFifo(tempbuf,(unsigned ));
SetRecvOrSend(START_SEND_AND_RECV);
// PutDatUart(tempbuf,(unsigned char)(len+((unsigned char)CCid_En)+1));
CardBufPoint = CardBufPoint + len;
CardBufferLength = CardBufferLength - len;
break;
case DONOTHING:
default:break;
} return OK;
}
最后，关于WTX的处理，需要一个定时器，其初值由ATS的内容确定，这里不再叙述