aboutsummaryrefslogtreecommitdiff
path: root/kernel/rgb.c
diff options
context:
space:
mode:
authorDimitri Sokolyuk <demon@dim13.org>2012-03-19 12:39:51 +0000
committerDimitri Sokolyuk <demon@dim13.org>2012-03-19 12:39:51 +0000
commit45036e2f94ee8bc881b508e7957d4838d10c18a3 (patch)
treedf2b0d92bdda3768d33cc6fc36f0248145fa291c /kernel/rgb.c
parent5f980e4f9e817b20c4aa21aa20182fc4401aff71 (diff)
replace multiplication with shift
Diffstat (limited to 'kernel/rgb.c')
-rw-r--r--kernel/rgb.c6
1 files changed, 2 insertions, 4 deletions
diff --git a/kernel/rgb.c b/kernel/rgb.c
index d16b77c..21c7c1e 100644
--- a/kernel/rgb.c
+++ b/kernel/rgb.c
@@ -46,8 +46,6 @@ rgb(void *arg)
}
}
-#define SCALE 80 /* gives ~50Hz duty cycle */
-
void
pwm(void *arg)
{
@@ -65,13 +63,13 @@ pwm(void *arg)
/* on */
if (t) {
PORTB |= _BV(a->pin);
- sleep(0, t * SCALE);
+ sleep(0, t << 6);
}
/* off */
if ((t = UINT8_MAX - t)) {
PORTB &= ~_BV(a->pin);
- sleep(0, t * SCALE);
+ sleep(0, t << 6);
}
}
}