Added get flag and get counter functions to timer. Allow proper interrupt handling and recording timer counter values.

include/libopencm3/stm32/timer.h

@@ -855,6 +855,7 @@ enum tim_oc_mode {
 void timer_reset(u32 timer_peripheral);
 void timer_enable_irq(u32 timer_peripheral, u32 irq);
 void timer_disable_irq(u32 timer_peripheral, u32 irq);
+bool timer_get_flag(u32 timer_peripheral, u32 flag);
 void timer_clear_flag(u32 timer_peripheral, u32 flag);
 void timer_set_mode(u32 timer_peripheral, u8 clock_div,
 		    u8 alignment, u8 direction);
@@ -915,5 +916,6 @@ void timer_set_disabled_off_state_in_idle_mode(u32 timer_peripheral);
 void timer_set_break_lock(u32 timer_peripheral, u32 lock);
 void timer_set_deadtime(u32 timer_peripheral, u32 deadtime);
 void timer_generate_event(u32 timer_peripheral, u32 event);
+u32 timer_get_counter(u32 timer_peripheral);
 
 #endif

lib/stm32/timer.c

@@ -104,6 +104,16 @@ void timer_disable_irq(u32 timer_peripheral, u32 irq)
 	TIM_DIER(timer_peripheral) &= ~irq;
 }
 
+bool timer_get_flag(u32 timer_peripheral, u32 flag)
+{
+	if (((TIM_SR(timer_peripheral) & flag) != 0) &&
+	    ((TIM_DIER(timer_peripheral) & flag) != 0)) {
+		return true;
+	}
+
+	return false;
+}
+
 void timer_clear_flag(u32 timer_peripheral, u32 flag)
 {
 	TIM_SR(timer_peripheral) &= ~flag;
@@ -929,3 +939,8 @@ void timer_generate_event(u32 timer_peripheral, u32 event)
 {
 	TIM_EGR(timer_peripheral) |= event;
 }
+
+u32 timer_get_counter(u32 timer_peripheral)
+{
+	return TIM_CNT(timer_peripheral);
+}