Omega Vehicle Security OME-PIO-D56 manual Read/Write 8-bit data Register

3.3.8Read/Write 8-bit data Register

(Read/Write):wBase+0xc0/0xc4/0xc8/0xd0/0xd4

Bit 7	Bit 6	Bit 5	Bit 4	Bit 3	Bit 2	Bit 1	Bit 0
D7	D6	D5	D4	D3	D2	D1	D0

Note. Refer to Sec. 3.1 for more information about wBase.

There are five/three 8-bit I/O ports in the OME-PIO-D56/OME-PIO-D24. Each port is easy to read/write to by access to their own data registers.

outportb(wBase+0xc0,Val);	/* write to D/O port	*/
Val=inportb(wBase+0xc0);	/* read from D/I port	*/
outportb(wBase+0xcc,0x07);	/* configure Port0~Port2 as DO port	*/
outportb(wBase+0xc0,i1);	/* write to Port0	*/
outportb(wBase+0xc0,i2);	/* write to Port1	*/
outportb(wBase+0xc0,i3);	/* write to Port2	*/
outportb(wBase+0xcc,0x01);	/* configure Port0 as DO port	*/
	/* Port1~Port2 as DI port	*/
outportb(wBase+0xc0,i1);	/* write to Port0	*/
j2=inportb(wBase+0xc4);	/* read Port1	*/
j3=inportb(wBase+0xc8);	/* read Port2	*/
l=inportb(wBase+0xd0);	/* read CON2 Low byte	*/
h=inportb(wBase+0xd4);	/* read CON2 High byte	*/
Val=(h<<8)+l;	/* Val is 16 bit data	*/
outportb(wBase+0xd0,Val);	/* write to CON1 Low byte	*/
outportb(wBase+0xd4,(Val>>8));	/* write to CON1 high byte	*/

OME-PIO-D56/OME-PIO-D24 User Manual (Ver.2.1, Oct/2003) ---- 37