FDI LP3180, User Manual, Page: 36 / 40

FDI
NXP LPC3180 Demo
User’s Manual
FDI
Rev 2 Page 36 9/7/2007
a. Purpose: If the screen is not inverted, this command places the screen in
inverted mode. If the screen is inverted, this command places the screen
in normal mode:
b. Arguments: None
c. Returns: 1 on failure, 0 on success
d. Example:
if (ioctl(fbfd, FBIO_TOGGLEINVERT)) {
printf("Error toggling screen invert.\n");
exit(1);
}
9. FBIO_INVERTON
a. Purpose: If the screen is in normal mode, this command places the screen
in inverted mode. If the screen is already inverted, this command has no
effect.
b. Arguments: None
c. Returns: 1 on failure, 0 on success
d. Example:
if (ioctl(fbfd, FBIO_INVERTON)) {
printf("Error inverting screen.\n");
exit(1);
}
10. FBIO_INVERTOFF
a. Purpose: If the screen is in inverted mode, this command places the
screen in normal mode. If the screen is already in normal mode, this
command has no effect.
b. Arguments: None
c. Returns: 1 on failure, 0 on success
d. Example:
if (ioctl(fbfd, FBIO_INVERTOFF)) {
printf("Error inverting screen.\n");
exit(1);
}
11. FBIO_CONTRASTPLUS
a. Purpose: Increments the screen’s contrast adjustment by 1. If the contrast
adjustment is at its highest possible value, this command has no effect.
b. Arguments: None
c. Returns: 1 on failure, 0 on success
d. Example:
if (ioctl(fbfd, FBIO_CONTRASTPLUS)) {
printf("Error increasing screen contrast.\n");
exit(1);
}