ISO14443-4块传输的实现(卡)
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原文地址::http://blog.sina.com.cn/s/blog_a20257d80101cju7.html
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1、
ISO14443-4块传输协议的实现
----http://blog.sina.com.cn/s/blog_a20257d80101cju3.html
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 char near lastframe[64];
unsigned char near lastframelen;
unsigned char near PBuffer[270],CardBuffer[270];
unsigned short near PBufferLength,PBufferPoint,CardBufPoint,CardBufferLength;
bit cblock_num,CCid_En;
unsigned char AckN(void)
{
unsigned char near buf[4];
buf[0] = 0XA2|cblock_num;
buf[0] = CCid_En?buf[0]|0x08:buf[0];
buf[1] = CCID;
WriteCardFifo(buf,2);
SetRecvOrSend(START_SEND_AND_RECV);
// PutDatUart(buf, 2);
return OK;
}
unsigned char AckY(void)
{
unsigned char near buf[4];
cblock_num=!cblock_num;
buf[0] = 0XA2|cblock_num;
buf[0] = CCid_En?buf[0]|0x08:buf[0];
buf[1] = CCID;
WriteCardFifo(buf,(unsigned char)((unsigned char)CCid_En+1));
// 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;
if(len==0)
{
return DONOTHING;
}
PCB = tempbuf[0];
Cid = PCB&CID_MASK;
if(((CCid_En==1)&&(CCID!=0)&&(Cid==0)) || ((CCid_En==0)&&(Cid==1))) 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
{
if(len<=2) return DONOTHING;
}
else //不带CID时长度不应少于1个字节
{
if(len<2) return DONOTHING;
}
if((PCB&0X02)!=0X02) return DONOTHING;
currentflag = PCB & LINK_MASK;
if(currentflag)
{
if(lastflag)
{
if((PBufferLength + len - 1 - (unsigned char)CCid_En)>BUFFERLENGTH)