Lanner LEC-7105 - Manual (Page 31)

31
Digital Input/Output Control
Appendix B
Embedded and Industrial Computing
Execute
Once build completed, application (and driver) is available
in bin sub-directory.
Just run “dio_tst” for Digital IO test. This program will drive
output pin with specific value and read status of input
pin. If you have external loopback which connects input
to output pins directly, the input value should be identical
with output value.
screen capture of the execution result:
Note: For more details, refer to the README file
contained within the program
For example
Setting GPO 60-63 all low. 1.
outportb(0x2e, 0x07); LDN8
outportb(0x2f, 0x08);
outportb(0x2e, 0x30); Setting GPIO6.
outportb(0x2f, 0x04);
outportb(0x2e, 0xE4); GP0 60-63
outportb(0x2f, 0x?0); ?:GP0 64-67 Unuse.
outportb(0x2e, 0xE6); GP0 60-63 Uninvert
outportb(0x2f, 0x?0); ?:GP0 64-67 Unuse.
outportb(0x2e, 0xE5); GP0 60-63 1:high
outportb(0x2f, 0x?0); 0:low
Setting GPI 24-27. 2.
outportb(0x2e, 0x07); LDN9
outportb(0x2f, 0x09);
outportb(0x2e, 0x30); Setting GPIO6.
outportb(0x2f, 0x04);
outportb(0x2e, 0xE4); GPI 24-27
outportb(0x2f, 0x?F); ?:GPI 20-23 Unuse.
outportb(0x2e, 0xE6); GPI 24-27 Uninvert
outportb(0x2f, 0x?0); ?:GPI 20-23 Unuse.