From 129b53ec9fc934a5cd66ab9ad25c81e058264321 Mon Sep 17 00:00:00 2001
From: Daniel Friesel <daniel.friesel@uos.de>
Date: Wed, 12 Aug 2020 14:23:36 +0200
Subject: stm32f446re: Add counter

---
 src/arch/stm32f446re-nucleo/driver/counter.cc | 14 ++++++++++++++
 1 file changed, 14 insertions(+)
 create mode 100644 src/arch/stm32f446re-nucleo/driver/counter.cc

(limited to 'src/arch/stm32f446re-nucleo/driver')

diff --git a/src/arch/stm32f446re-nucleo/driver/counter.cc b/src/arch/stm32f446re-nucleo/driver/counter.cc
new file mode 100644
index 0000000..dfd22e3
--- /dev/null
+++ b/src/arch/stm32f446re-nucleo/driver/counter.cc
@@ -0,0 +1,14 @@
+#include "arch.h"
+#include "driver/counter.h"
+
+Counter counter;
+
+void tim2_isr(void)
+{
+	if (timer_get_flag(TIM2, TIM_SR_UIF)) {
+		timer_clear_flag(TIM2, TIM_SR_UIF);
+		if (counter.overflow < 4294967295) {
+			counter.overflow++;
+		}
+	}
+}
-- 
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