请教FM1701读取S70卡7字节UID步骤
FM1701读取S50 4字节的UID没有问题,读取7字节的UID,首次0x93 0x20 也能返回 0x88 UID0 UID1UID2BCC 接下来打开CRC,用选卡命令0x93 0x70 是怎样的步骤呢?一直没有试成功resig_write(ChannelRedundancy,0x0f);
resig_write(Control,0x08);
temp=resig_read(Control);
temp=temp|0x01;
resig_write(Control,temp);
Fbuff=0x93;
Fbuff=0x70;
for(i=0;i<5;i++)
{
Fbuff=UID;
}
fifo_write(7,Fbuff);
resig_write(Command,0x1e);
delay(2);
Fbuff=0x95;
Fbuff=0x20;
fifo_write(2,Fbuff);
resig_write(Command,0x1e);
delay(2);
temp=resig_read(FIFOLength);读出FIFO一直为0
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