diff --git a/lark1fq/src/debug.c b/lark1fq/src/debug.c
index 415bc01..d705be3 100755
--- a/lark1fq/src/debug.c
+++ b/lark1fq/src/debug.c
@@ -16,7 +16,7 @@ void debug_init(void)
 
     /* config debug uart pin */
     RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC, ENABLE);
-    GPIO_PinAFConfig(DEBUG_UART_PORT, GPIO_PinSource10, GPIO_AF_UART4);    
+    GPIO_PinAFConfig(DEBUG_UART_PORT, GPIO_PinSource6, GPIO_AF_USART6);    
     GPIO_InitStructure.GPIO_Pin = DEBUG_UART_PIN;
     GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
     GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
@@ -24,19 +24,19 @@ void debug_init(void)
     GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
     GPIO_Init(DEBUG_UART_PORT, &GPIO_InitStructure);
     /* config debug uart function */
-    RCC_APB1PeriphClockCmd(RCC_APB1Periph_UART4, ENABLE);
-    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA1, ENABLE);
-    USART_DeInit(UART4);
-    USART_OverSampling8Cmd(UART4, DISABLE); 
+    RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART6, ENABLE);
+    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2, ENABLE);
+    USART_DeInit(USART6);
+    USART_OverSampling8Cmd(USART6, DISABLE); 
     USART_InitStructure.USART_BaudRate = DEBUG_UART_BAUDRATE;
     USART_InitStructure.USART_WordLength = USART_WordLength_8b;
     USART_InitStructure.USART_Parity = USART_Parity_No;
     USART_InitStructure.USART_StopBits = USART_StopBits_1;
     USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
     USART_InitStructure.USART_Mode = USART_Mode_Tx;
-    USART_Init(UART4, &USART_InitStructure);
-    USART_DMACmd(UART4, USART_DMAReq_Tx, ENABLE);
-    USART_Cmd(UART4, ENABLE);
+    USART_Init(USART6, &USART_InitStructure);
+    USART_DMACmd(USART6, USART_DMAReq_Tx, ENABLE);
+    USART_Cmd(USART6, ENABLE);
     /* Configure DMA controller to manage UART TX request */ 
     DMA_InitStructure.DMA_BufferSize = DEBUG_CHAN_MAX * 4 + 4;
     DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable;
@@ -45,22 +45,22 @@ void debug_init(void)
     DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
     DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
     DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
-    DMA_InitStructure.DMA_PeripheralBaseAddr =(uint32_t)(&(UART4->DR));
+    DMA_InitStructure.DMA_PeripheralBaseAddr =(uint32_t)(&(USART6->DR));
     DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;
     DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
     DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
     DMA_InitStructure.DMA_Priority = DMA_Priority_Low;
-    DMA_InitStructure.DMA_Channel = DMA_Channel_4;
+    DMA_InitStructure.DMA_Channel = DMA_Channel_5;
     DMA_InitStructure.DMA_DIR = DMA_DIR_MemoryToPeripheral;
     DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)debug_buff;
-    DMA_Init(DMA1_Stream4, &DMA_InitStructure);
-    /* Configure interrupt for UART4 TX */
-    NVIC_InitStructure.NVIC_IRQChannel = UART4_IRQn;
+    DMA_Init(DMA2_Stream6, &DMA_InitStructure);
+    /* Configure interrupt for USART6 TX */
+    NVIC_InitStructure.NVIC_IRQChannel = USART6_IRQn;
     NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 10;
     NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
     NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
     NVIC_Init(&NVIC_InitStructure);
-    USART_ITConfig(UART4, USART_IT_TC, ENABLE);
+    USART_ITConfig(USART6, USART_IT_TC, ENABLE);
 
     /* debug data init */
     debug_data.enable = DEBUG_ENABLE;
@@ -74,9 +74,9 @@ void debug_send_frame(void)
     }
     debug_data.busy = 1;
     *(uint32_t *)(debug_buff + DEBUG_CHAN_MAX) = 0x7F800000;
-    DMA_SetCurrDataCounter(DMA1_Stream4, sizeof(debug_buff));
-    USART_ClearITPendingBit(UART4, USART_IT_TC);
-    DMA_Cmd(DMA1_Stream4, ENABLE);
+    DMA_SetCurrDataCounter(DMA2_Stream6, sizeof(debug_buff));
+    USART_ClearITPendingBit(USART6, USART_IT_TC);
+    DMA_Cmd(DMA2_Stream6, ENABLE);
 }
 
 void debug_write_data(uint16_t ch, float data)
@@ -90,11 +90,11 @@ void debug_write_data(uint16_t ch, float data)
     debug_buff[ch] = data;
 }
 
-void UART4_IRQHandler(void)
+void USART6_IRQHandler(void)
 {
-    if (USART_GetITStatus(UART4, USART_IT_TC) != RESET) {
-        USART_ClearITPendingBit(UART4, USART_IT_TC);
-        DMA_ClearFlag(DMA1_Stream4, DMA_FLAG_TCIF4);
+    if (USART_GetITStatus(USART6, USART_IT_TC) != RESET) {
+        USART_ClearITPendingBit(USART6, USART_IT_TC);
+        DMA_ClearFlag(DMA2_Stream6, DMA_FLAG_TCIF6);
         debug_data.busy = 0;
     }
 }