From a4db90ecf45c86fb67f900226f78c5bc6e67d99e Mon Sep 17 00:00:00 2001
From: Jonathan Wyss <j.wyss@kolabnow.ch>
Date: Wed, 6 Mar 2024 13:05:14 +0100
Subject: [PATCH] changed frequencies, suspect running 8 times slower than
 thought

---
 main.c   | 6 +++---
 makefile | 2 +-
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/main.c b/main.c
index 05fc130..a830f35 100644
--- a/main.c
+++ b/main.c
@@ -1,4 +1,4 @@
-#define F_CPU 8000000UL
+#define F_CPU 1000000UL
 #include <util/delay.h>
 #include <avr/io.h>
 #include <avr/interrupt.h>
@@ -22,7 +22,7 @@ void count(void)
 {
 	//counts=0;//0..65535 
 	counts++;
-	if(counts>=31)
+	if(counts>=128)	//1m	//1ms
 	{
 			counts=0;
 			if(ms<60000)//1 minute
@@ -68,7 +68,7 @@ int main (void) {            // (2)
 	cli();
 //#######Timer0-setup#####			|Phase correct pwm
 	TCCR0A = (1<<COM0A1)|(1<<COM0B1)|(1<<WGM00)|(1<<WGM01);	//mode fast pwm (1/Fcpu)*prescaler*(max+1) = 
-	TCCR0B = (1<<CS00)|(1<<CS00);				//frequency /256 = 31250Hz , 1 t0 period = 8.192ms 1 increment = 0.032ms strangly prescaler of 1 results in expected results as prescaler was 256
+	TCCR0B = (1<<CS01)|(1<<CS01);				//prescaler /64 gives 0...255 0.002048s = 2.0ms 1mhz-> /8 
 
 //	PLLCSR |= (1 << PLLE) | (1 << PCKE);
 //######Timer1-setup
diff --git a/makefile b/makefile
index 0652c03..ebfeda7 100644
--- a/makefile
+++ b/makefile
@@ -5,7 +5,7 @@
 # (GNU make, BSD make, SysV make)
 
 
-MCU = attiny85
+MCU = attiny45
 FORMAT = ihex
 TARGET = main
 SRC = $(TARGET).c