Update timer.h

stevstrong · web-flow · commit dfb5bd4c30f4 · 2017-11-13T13:02:27.000+01:00
- clear the IRQ flag before enabling the IRQ
diff --git a/STM32F1/system/libmaple/include/libmaple/timer.h b/STM32F1/system/libmaple/include/libmaple/timer.h
@@ -828,6 +828,7 @@ static inline void timer_dma_disable_req(timer_dev *dev, uint8 channel) {
  * @see timer_channel
  */
 static inline void timer_enable_irq(timer_dev *dev, uint8 interrupt) {
+    *bb_perip(&(dev->regs).adv->SR, interrupt) = 0; // clear interrupt flag
     *bb_perip(&(dev->regs).adv->DIER, interrupt) = 1;
 }
 

Original file line number	Diff line number	Diff line change
`@@ -828,6 +828,7 @@ static inline void timer_dma_disable_req(timer_dev *dev, uint8 channel) {`
`828`	`828`	`* @see timer_channel`
`829`	`829`	`*/`
`830`	`830`	`static inline void timer_enable_irq(timer_dev *dev, uint8 interrupt) {`
	`831`	`+ *bb_perip(&(dev->regs).adv->SR, interrupt) = 0; // clear interrupt flag`
`831`	`832`	`*bb_perip(&(dev->regs).adv->DIER, interrupt) = 1;`
`832`	`833`	`}`
`833`	`834`