单片机的I/O口模拟I2C数据总线传输方式

}

IIC_stop ();

return ;

}

void IIC_send_adder ( uchar adder , uchar sub , uchar ddata )

{

bit ack;

IIC_str();

ack=IIC_send_byte ( adder );//发送从机地址

if ( !ack )

{

alarm=0;

return ;}

ack=IIC_send_byte ( sub );//发送从机子地址

if ( !ack )

{ alarm=0;

return ;}

ack=IIC_send_byte ( ddata );//发送数据

if ( !ack )

{ alarm=0;

return ;}

IIC_stop ();

return ;

}

void IIC_read_adder ( uchar adder, uchar sub, uchar *buf, uchar num )

{

bit ack;

uchar i;

IIC_str ();

ack=IIC_send_byte ( adder );//发送从机地址

if ( !ack )

{ alarm=0;

return ;}

ack=IIC_send_byte ( sub );//发送从机子地址

if ( !ack )

{ alarm=0;

return ;}

for ( i=0; i

{

*( buf++ )=IIC_read_byte ( 1 );//接收数据存储倒*buf

}

IIC_stop ();

return ;

}