2 is toggle slowly when there is an error in In-Band-Interrupt process. .</p>
<h4 id="notes"><b>Notes</b></h4>
<ol type="1">
<li><p>Care must be taken when using HAL_Delay(), this function provides accurate delay (in milliseconds) based on variable incremented in SysTick ISR. This implies that if HAL_Delay() is called from a peripheral ISR process, then the SysTick interrupt must have higher priority (numerically lower) than the peripheral interrupt. Otherwise the caller ISR process will be blocked. To chan