stm32f446re: Add counter

1 files changed, 14 insertions, 0 deletions

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++;
+		}
+	}
+}