calculation for timer

2024-03-01 10:49:07 +01:00 · 2024-03-01 10:49:07 +01:00 · 4b8c5a46e9
commit 4b8c5a46e9
parent dc9bec7594
1 changed files with 14 additions and 0 deletions
--- a/main.c
+++ b/main.c
@ -125,3 +125,17 @@ int map(int value, int old_min, int old_max,int new_min, int new_max)
 {
 		return (new_max/old_max*value);
 }
+
+void setupTimer(void)
+{
+		TCCR1 = (1<<CS13)|(1<<CS12)|(1<<CS11)|(1<<CS10)|		//CK/16384
+				(1<<CTC1);										//clear timer on compare match
+		GTCCR = 0;												//default values should be ok
+		OCR1A =	255;											//Compare value of timer / overflow , sets OCF1A
+																//
+}
+/*
+ * 1/(30Mhz/16384) *255 = 0.139264s  Time for one overflow
+ * 			1024		= 0.008704s 
+ *			2024		= 0.017204s
+ * 						255/0.017204*0.001=15 counts = 1ms