mf-rc500读卡程序

ID:334165 · 发表于 2018-5-29 11:22

uint8 Mf500Read( uint8 reg )
   {
      uint32 BitMask, AddressMask, Data;
      uint8 val, i;
      Data = 0;
      BitMask = 0;
      AddressMask = 0;
      for( i = 0; i < sizeof( BusAdjust ); i ++ )
      {
            if( reg & 1 << i )
            AddressMask |= 1 << BusAdjust[i];
            BitMask |= 1 << BusAdjust[i];
      }
      IO1DIR = IO1DIR | BitMask;
      IO1CLR = Mf500AlePin;
      IO0SET = Mf500RdPin | Mf500WrPin;
      IO1SET = Mf500CsPin;
      BitMask = ~ BitMask;
      IO1PIN = ( IO1PIN & BitMask ) | AddressMask;
      IO1SET = Mf500AlePin;
      BitMask = ~ BitMask;
      IO1CLR = Mf500AlePin;
      IO1SET = BitMask;
      BitMask = ~ BitMask;
      IO1DIR = IO1DIR & BitMask;
      IO1CLR = Mf500CsPin;
      IO0CLR = Mf500RdPin;
      i = 25;
      while( -- i );
      Data = IO1PIN;
      IO0SET = Mf500RdPin;
      IO1SET = Mf500CsPin;
      val = 0;
      for( i = 0; i < sizeof( BusAdjust ); i ++ )
      {
               if( Data & 1 << BusAdjust[i] )
               val |= 1 << i;
      }
      return val;
   }
   以上程序为ARM7的，程序不是按位操作的，但是与时序图可以吻合。
   FM1702的则为SPI口操作的，和我的设置有些不一样，所以就不贴了。

我用的是飞思卡尔8位机9S08，读寄存器的代码如下
   unsigned char RC500Read(unsigned char Addr)
  {
unsigned char AddrL = 0; //低八位地址
unsigned char AddrH = 0; //高八位地址
unsigned char Date  = 0;

AddrL = Addr & 0x0f;
AddrH = (Addr & 0xf0)>>4;

PTBDD = 1;       //AD0-AD3,Output
PTDDD = 1;       //AD4-AD7,OUTput

RC500_ALE = 0;
RC500_CS  = 1;
RC500_RD  = 1;
RC500_WR  = 1;

RC500_ADL = AddrL; //给地址
RC500_ADH = AddrH;
delay_50us (1);    //延时50uS
RC500_ALE = 1;       //地址锁存拉高，实则为6位
delay_50us (1);    //延时50uS
RC500_ALE = 0;       //地址锁存释放，锁存完成
delay_50us (1);    //延时50uS，保持地址

PTBDD = 0;       //AD0-AD3,input
PTDDD = 0;       //AD4-AD7,input
RC500_CS  = 0;       //片选拉低
RC500_RD  = 0;       //读信号
delay_50us (1);
Date = (RC500_ADH << 4)|RC500_ADL; //读入
RC500_CS  = 1;       //片选拉低
RC500_RD  = 1;       //读信号

return Date;
}
由于IO的原因，我选择了两个IO口，每个IO口都是4位，所以拼起来做了一个8位的口。程序基本参考了imzhangx的。

写寄存器的代码
void RC500Write(unsigned char Addr,unsigned char Date)
{
unsigned char AddrL = 0; //低八位地址
unsigned char AddrH = 0; //高八位地址
unsigned char DateL = 0; //低八位数据
unsigned char DateH = 0; //高八位数据

AddrL = Addr & 0x0f;
AddrH = (Addr & 0xf0)>>4;
DateL = Date & 0x0f;
DateH = (Date & 0xf0)>>4;

PTBDD = 1;       //AD0-AD3,Output
PTDDD = 1;       //AD4-AD7,OUTput

RC500_ALE = 0;
RC500_CS  = 1;
RC500_RD  = 1;
RC500_WR  = 1;

RC500_ADL = AddrL; //给地址
RC500_ADH = AddrH;
delay_50us (1);    //延时50uS
RC500_ALE = 1;       //地址锁存拉高，实则为6位
delay_50us (1);    //延时50uS
RC500_ALE = 0;       //地址锁存释放，锁存完成
delay_50us (1);    //延时50uS，保持地址

RC500_CS  = 0;
RC500_ADL = DateL; //给数据
RC500_ADH = DateH;
RC500_WR  = 0;
delay_50us (1);    //等待写入
RC500_CS  = 1;
RC500_WR  = 1;       //写入完成
}

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