From: bernie <bernie@38d2e660-2303-0410-9eaa-f027e97ec537>
Date: Tue, 20 Jul 2004 23:49:40 +0000 (+0000)
Subject: Compute value of OCR_DIVISOR from CLOCK_FREQ.
X-Git-Tag: 1.0.0~1169
X-Git-Url: https://codewiz.org/gitweb?a=commitdiff_plain;h=d0c3b9f14ce6bcf214e6957b888183a30baae13d;p=bertos.git

Compute value of OCR_DIVISOR from CLOCK_FREQ.


git-svn-id: https://src.develer.com/svnoss/bertos/trunk@72 38d2e660-2303-0410-9eaa-f027e97ec537
---

diff --git a/drv/timer_avr.h b/drv/timer_avr.h
index 4f842eef..15bf8730 100755
--- a/drv/timer_avr.h
+++ b/drv/timer_avr.h
@@ -15,6 +15,9 @@
 
 /*
  * $Log$
+ * Revision 1.7  2004/07/20 23:49:40  bernie
+ * Compute value of OCR_DIVISOR from CLOCK_FREQ.
+ *
  * Revision 1.6  2004/07/20 23:48:16  bernie
  * Finally remove redundant protos.
  *
@@ -52,7 +55,7 @@
  * System timer: additional division after the prescaler
  * 12288000 / 64 / 192 (0..191) = 1 ms
  */
-#define OCR_DIVISOR 191
+#define OCR_DIVISOR  (CLOCK_FREQ / TIMER_PRESCALER / TICKS_PER_SEC - 1) /* 191 */
 
 /*! HW dependent timer initialization  */
 #if defined(CONFIG_TIMER_ON_TIMER0)