diff --git a/Src/SerialPortFlagchip.c b/Src/SerialPortFlagchip.c
index d4c9618..1db5c8f 100644
--- a/Src/SerialPortFlagchip.c
+++ b/Src/SerialPortFlagchip.c
@@ -81,7 +81,6 @@ void vSerialPortInitDMA(
     env->chnCfg.pSrcBuffer = &(uart->DATA);
     env->chnCfg.pDestBuffer = DMA_BUF;
     env->chnCfg.u32BlockSize = 1U;
-    //env->chnCfg.u32BlockSize = (UART_RX_FIFO_WATERMARK + 1U);;
     env->chnCfg.u16BlockCount = 1U;
     env->chnCfg.u8ChannelPriority = IRQ_DMA_CHANNEL_PRIORITY;
     env->chnCfg.eSrcDataSize = DMA_TRANSFER_SIZE_1B;
@@ -95,11 +94,6 @@ void vSerialPortInitDMA(
     env->chnCfg.bDestAddrLoopbackEn = false;
     env->chnCfg.bAutoStop = false;
 
-    //env->chnCfg.bSrcCircularBufferEn = false;
-    //env->chnCfg.u32SrcCircBufferSize = 0U;
-    //env->chnCfg.bDestCircularBufferEn = false;
-    //env->chnCfg.u32DestCircBufferSize = 0U;
-
     env->chnCfg.bSrcCircularBufferEn = false;
     env->chnCfg.u32SrcCircBufferSize  = 0U;
     env->chnCfg.bDestCircularBufferEn = true;
@@ -131,10 +125,6 @@ void vSerialPortInitDMA(
     if (u32PccFuncClk != 0U) {
         env->tInitCfg.bEnRxFullDma = true;                        // UART receiver full DMA disable
 
-        //env->tInitCfg.bEnRxFifo = false;                          // UART fifo disable
-        //env->tInitCfg.bEnTxFifo = true;                      // UART tx fifo enable
-        //env->tInitCfg.u8TxFifoWaterMark = 0U;                // UART tx fifo 16 bytes trigger
-
         env->tInitCfg.bEnTxFifo = true;
         env->tInitCfg.u8TxFifoWaterMark = 0U;
 
@@ -266,7 +256,10 @@ void SerialPort_RxDmaBufToQueue(tSerialPortFlagchip *env, const void *pSrcBuffer
         }
     }
 
+    env->UART_DMA_RECEIVED_POINTER_BUF += env->UART_DMA_RECEIVED_LEN_BUF;
     env->UART_DMA_RECEIVED_LEN_BUF = 0;
+    if (env->UART_DMA_RECEIVED_POINTER_BUF >= env->DMA_BUF_LEN)
+        env->UART_DMA_RECEIVED_POINTER_BUF = 0;
 
 }