X-Git-Url: https://www.fi.muni.cz/~kas/git//home/kas/public_html/git/?a=blobdiff_plain;f=firmware%2Fpwm.c;h=4eb2f83183a1ee411176b58815180afe12d786d0;hb=50b66ac17ddb7c5cf2105959905bdb3ca183a978;hp=2df2e6bb8b9abe762c1bb6208a13e6a4dde4cd7c;hpb=ddc8f4be4d90e7e709832b5135b2e7e4631b1554;p=bike-lights.git

diff --git a/firmware/pwm.c b/firmware/pwm.c
index 2df2e6b..4eb2f83 100644
--- a/firmware/pwm.c
+++ b/firmware/pwm.c
@@ -4,7 +4,7 @@
 
 #include "lights.h"
 
-#define PWM_MAX 0x1FF
+#define PWM_MAX 0x0FF
 
 void init_pwm()
 {
@@ -36,15 +36,6 @@ void init_pwm()
 	PORTB &= ~(_BV( PB1 ) | _BV( PB3 ) | _BV( PB5 )); // set to zero
 }
 
-void pwm_on(unsigned char n)
-{
-	switch (n) {
-	case 0: DDRB |= _BV(PB1); break;
-	case 1: DDRB |= _BV(PB3); break;
-	case 2: DDRB |= _BV(PB5); break;
-	}
-}
-
 void pwm_off(unsigned char n)
 {
 	switch (n) {
@@ -58,8 +49,13 @@ void pwm_set(unsigned char n, unsigned char stride)
 {
 	TC1H = 0x00;
 	switch (n) {
-	case 0: OCR1A = stride; break;
-	case 1: OCR1B = stride; break;
+	case 0:
+		OCR1A = stride;
+		DDRB |= _BV(PB1);
+		break;
+	case 1: OCR1B = stride;
+		DDRB |= _BV(PB3);
+		break;
 	case 2: {
 			uint16_t s16 = PWM_MAX - (uint16_t)stride;
 			volatile unsigned char hi, lo;
@@ -67,6 +63,7 @@ void pwm_set(unsigned char n, unsigned char stride)
 			lo = s16 & 0xFF;
 			TC1H = hi;
 			OCR1D = lo;
+			DDRB |= _BV(PB5);
 		}
 		break;
 	}