From d41e70ce3463f6b239da415c5d69773fce55f9e9 Mon Sep 17 00:00:00 2001
From: Sadeep Madurange <sadeep@asciimx.com>
Date: Sat, 2 Nov 2024 15:18:22 +0800
Subject: Initial commit.

---
 main.c | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)
 create mode 100644 main.c

(limited to 'main.c')

diff --git a/main.c b/main.c
new file mode 100644
index 0000000..aed9465
--- /dev/null
+++ b/main.c
@@ -0,0 +1,25 @@
+#include <avr/io.h>
+#include <avr/interrupt.h>
+
+int main(void)
+{
+	DDRB |= (1 << DDB5);
+
+	TCCR1A = 0;
+	TCNT1 = 65535 - (F_CPU / 1024);
+	TCCR1B = (1 << CS10) | (1 << CS12);
+	TIMSK1 = (1 << TOIE1);
+
+	sei();
+
+	for (;;)
+		;
+
+	return 0;
+}
+
+ISR(TIMER1_OVF_vect)
+{
+	PORTB ^= (1 << 5);
+	TCNT1 = 65535 - (F_CPU / 1024);
+}
-- 
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