pwm.c: PLL clock enabling code

[bike-lights.git] / firmware / pwm.c

diff --git a/firmware/pwm.c b/firmware/pwm.c
index da9fe3df679b9feb1faede1ed11205773890a824..3ef52c3fd436bc733ab7567b722487981fd3c133 100644 (file)
--- a/firmware/pwm.c
+++ b/firmware/pwm.c
@@ -7,23 +7,28 @@
 static uint16_t pwm[N_PWMLEDS];
 static volatile unsigned char step;
 
-void init_pwm()
+static void enable_pll()
 {
-       int i;
-
-       step = 0;
-
-       for (i = 0; i < N_PWMLEDS; i++)
-               pwm[n] = 0;
-
        /* Async clock */
        PLLCSR = _BV(PLLE);
 
        /* Synchronize to the phase lock */
-       _delay_ms(1);
+       _delay_us(100);
        while ((PLLCSR & _BV(PLOCK)) == 0)
                ;
        PLLCSR |= _BV(PCKE);
+}
+
+void init_pwm()
+{
+       int i;
+
+       step = 0;
+
+       for (i = 0; i < N_PWMLEDS; i++)
+               pwm[i] = 0;
+
+       enable_pll();
 
        // PWM channel D is inverted, ...
        TCCR1C = _BV(COM1D1) | _BV(COM1D0) | _BV(PWM1D);
@@ -56,6 +61,8 @@ void susp_pwm()
        TCCR1D = TCCR1C = TCCR1B = TCCR1A = 0;
        TIMSK = 0;
        TIFR = 0;
+
+       PLLCSR &= ~(_BV(PLLE) | _BV(PCKE));
 }
 
 void pwm_off(unsigned char n)
@@ -116,8 +123,8 @@ void pwm_timer()
                step = 0;
 
        for (i = 0; i < N_PWMLEDS; i++)
-               if (pwm[n])
-                       pwm_update_hw(n);
+               if (pwm[i])
+                       pwm_update_hw(i);
 }
 
 #if 0