Table of Contents
Advertisement
3.3.6
Interrupt Polarity Control Register
(Read/Write): wBase+0x2A
Bit 7
Bit 6
0
0
Note. Refer to Sec. 3.1 for more information about wBase.
INV0=1
select the non-inverted signal from PC0
INV0=0
select the inverted signal from PC0
outportb(wBase+0x2a,0x0f); /* select the non-inverted input PC0/1/2/3
outportb(wBase+0x2a,0x00); /* select the inverted input of PC0/1/2/3
outportb(wBase+0x2a,0x0e); /* select the inverted input of PC0
outportb(wBase+0x2a,0x0c); /* select the inverted input of PC0/1
Refer to Sec. 2.4 for more information.
Refer to DEMO5.C for more information.
3.3.7
I/O Selection Control Register
(Write): wBase+0xcc
Bit 7
Bit 6
0
0
Note. Refer to Sec. 3.1 for more information about wBase.
Port? = 1
this port is used as a D/O port
Port? = 0
this port is used as a D/I port
outportb(wBase+0xcc,0x00);
outportb(wBase+0xcc,0x04);
OME-PIO-D56/PIO-D24 User Manual (Ver.2.1, Oct/2003, PPH-005-21)
Bit 5
Bit 4
0
0
/* select the non-inverted input PC1/2/3
/* select the non-inverted input PC2/3
Bit 5
Bit 4
0
0
/* configure Port0/1/2 as D/I port
/* configure Port0/1 as D/I port
/* configure Port2 as D/O port
Bit 3
Bit 2
INV3
INV2
Bit 3
Bit 2
0
Port2
Bit 1
Bit 0
INV1
INV0
*/
*/
*/
*/
*/
*/
Bit 1
Bit 0
Port1
Port0
*/
*/
*/
---- 36
Advertisement
Table of Contents
