QNX RTOS v4 Knowledge Base
QNX RTOS v4 Knowledge Base
| Title |
Disabling the keyboard |
| Ref. No. |
QNX.000001528 |
| Category(ies) |
Development |
| Issue |
Is there an easy way to disable the keyboard in a c program?
|
| Solution |
Use:
x09outp(0x64, ad) -> to disable
x09outp(0x64, ae) -> to re-enable
OR
You could use the following code:
NOTE:this is an example on how to flash the keyboard lights, good starting point for actual code.
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/qioctl.h>
#include <sys/keycodes.h>
int set_lights(int fd, unsigned long lights);
int
main(int argc, char *argv[])
{
int fd, i;
unsigned long lights;
if ((fd = open("/dev/kbd", O_RDWR)) <0) {
perror("open");
return (EXIT_FAILURE);
}
lights = KEYIND_SCROLL_LOCK | KEYIND_NUM_LOCK | KEYIND_CAPS_LOCK;
for (i = 0; i <5; i++) {
set_lights(fd, lights);
delay(500);
set_lights(fd, 0);
delay(500);
}
return (EXIT_SUCCESS);
}
int
set_lights(int fd, unsigned long lights)
{
unsigned long bits[2];
bits[0] = lights;
bits[1] = KEYIND_SCROLL_LOCK | KEYIND_NUM_LOCK | KEYIND_CAPS_LOCK;
if (qnx_ioctl(fd, QCTL_DEV_CTL, &bits, sizeof(bits), 0, 0) <0) {
perror("qnx_ioctl");
return (-1);
}
return (0);
} |
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