From b0cd207694674c5509932e3fd1d286f5d4d98780 Mon Sep 17 00:00:00 2001
From: Bernhard Tittelbach <xro@realraum.at>
Date: Thu, 10 Oct 2013 23:41:05 +0000
Subject: OpenPCR-controller

git-svn-id: https://svn.spreadspace.org/avr/trunk@238 aa12f405-d877-488e-9caf-2d797e2a1cc7
---
 pcr-controller/pwm.c | 48 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 48 insertions(+)
 create mode 100644 pcr-controller/pwm.c

(limited to 'pcr-controller/pwm.c')

diff --git a/pcr-controller/pwm.c b/pcr-controller/pwm.c
new file mode 100644
index 0000000..918d37b
--- /dev/null
+++ b/pcr-controller/pwm.c
@@ -0,0 +1,48 @@
+
+#include "pwm.h"
+
+
+#define PWM_VAL OCR1AL
+//OC1A
+
+void pwm_init(void)
+{
+  DDRB |= (1<<PB5);
+  TCCR1A = 0;
+  TCNT1 = 0;
+  OCR1A = 0;
+  TCCR1A = (1<<COM1A1) | (1<<WGM10);
+  TCCR1B = (1<<WGM12);
+}
+
+inline void pwm_on(void)
+{
+  TCCR1B = (TCCR1A & 0xF8) | (1<<CS10);
+}
+
+inline void pwm_off(void)
+{
+  TCCR1B = (TCCR1A & 0xF8);
+  TCNT1 = 0;
+}
+
+void pwm_set(uint8_t val)
+{
+  if (val > 0)
+    pwm_on();
+  else
+    pwm_off();
+  PWM_VAL = val;
+}
+
+inline void pwm_inc(void)
+{
+  if(PWM_VAL < 255)
+    PWM_VAL++;
+}
+
+inline void pwm_dec(void)
+{
+  if(PWM_VAL > 0)
+    PWM_VAL--;
+}
-- 
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