diff --git a/Src/SerialPortFlagchip.c b/Src/SerialPortFlagchip.c
index d12589a..174fbcf 100644
--- a/Src/SerialPortFlagchip.c
+++ b/Src/SerialPortFlagchip.c
@@ -105,7 +105,7 @@ void vSerialPortInitDMA(
 
     DMA_StartChannel(DMA_INSTANCE_0, RX_DMA_CHANNEL);
 
-    NVIC_SetPriorityGrouping(NVIC_PRIORITY_GROUP_4);
+    //NVIC_SetPriorityGrouping(NVIC_PRIORITY_GROUP_4);
 
     NVIC_EnableIRQ(IRQ_DMA);
     NVIC_SetPriority(DMA_Error_IRQn, IRQ_DMA_PRIORITY);