SLE4442卡_IC的51单片机驱动程序

char data_RST[4], ErrorCount[4];

void IC_RST(void)
{
uchar value,i,count;
DATA_IN; //IC输入
RST_LOW; //复位时序
CLK_LOW;
DATA_HIGH;
DelayUs(5);
RST_HIGH;
DelayUs(5);
CLK_HIGH;
DelayUs(5);
CLK_LOW;
DelayUs(5);
RST_LOW;
DelayUs(2);
for(i=0;i<4;i++) //读4个BYTE 可用后面的Byte_Read()代替
{
value = 0xff;
for(count=0;count<8;count++)
{
value = value >> 1;
DelayUs(2);
CLK_LOW;
DelayUs(2);
CLK_HIGH;
DelayUs(2);
if(RD5 == 1)
{
value |= 0x80; //判断IO脚是否为1，是则位置1
}
else
{
value &= 0x7f; //否则位置0
}
DelayUs(2);

}
data_RST[i] = value;
DelayUs(2);
}
DelayUs(2);
CLK_LOW;
DelayUs(2);
DATA_HIGH;
}

void IC_Init(void) //初始化
{
TRISD1 = 0;
RD1 = 0; //上电
TRISD4 = 0; //时钟输出
TRISD3 = 0; //RST输出
DelayMs(5); //上电的必要延时，否则程序出错
}

void Start(void)
{
DATA_OUT; //开始时序
CLK_LOW;
DATA_HIGH;
DelayUs(2);
CLK_HIGH;
DelayUs(2);
DATA_LOW;
DelayUs(2);
CLK_LOW;
}

void Stop(void) //结束时序
{
DATA_OUT;
CLK_LOW;
NOP();
NOP();
DATA_LOW;
DelayUs(2);
CLK_HIGH;
DelayUs(2);
DATA_HIGH;
DelayUs(2);
}

uchar Byte_Read(void) //读字节
{
uchar count;
uchar value;
DATA_IN;
DelayUs(2);
value = 0xff;
for(count=0;count<8;count++)
{
value = value >> 1; //循环右移，从最低位开始读
DelayUs(2);
CLK_LOW;
DelayUs(2);
CLK_HIGH;
DelayUs(2);
if(RD5 == 1)
{
value |= 0x80;//判断IO脚是否为1
}
else
{
value &= 0x7f;
}
DelayUs(2);
}
return (value);
}