diff --git a/Power_Pico/Core/Inc/adc.h b/Power_Pico/Core/Inc/adc.h
index 0957737..0b6a9ad 100644
--- a/Power_Pico/Core/Inc/adc.h
+++ b/Power_Pico/Core/Inc/adc.h
@@ -29,10 +29,23 @@ extern "C" {
 #include "main.h"
 
 /* USER CODE BEGIN Includes */
+
 #define ADC_TIMES 10
 #define ADC_CHANELS 4
+
+typedef struct {
+  uint8_t  header[5];
+  // 0x55, 0xAA header
+  // 0x64 adc times, 0x05 adc channels (so data lenth is times * channels * 2 bytes)
+  // and 1byte for direct & unit, 0x0? for positive, 0x1? for negative, 0x?0 for LOW, 0x?1 for MID, 0x?2 for HIGH
+  uint16_t data[ADC_TIMES][ADC_CHANELS]; // ADC 数据（真正要采集的地方）
+} __attribute__((packed)) ADC_Packet;
+
+extern ADC_Packet adc_packet1, adc_packet2;
+
 // cur 5mr, cur 500mr, cur 50r, val
-extern uint16_t adc_buf[ADC_TIMES][ADC_CHANELS];
+extern uint16_t adc_buf1[ADC_TIMES+1][ADC_CHANELS];
+extern uint16_t adc_buf2[ADC_TIMES+1][ADC_CHANELS];
 /* USER CODE END Includes */
 
 extern ADC_HandleTypeDef hadc1;
diff --git a/Power_Pico/Core/Src/adc.c b/Power_Pico/Core/Src/adc.c
index c0d49b2..2bc152a 100644
--- a/Power_Pico/Core/Src/adc.c
+++ b/Power_Pico/Core/Src/adc.c
@@ -22,8 +22,10 @@
 
 /* USER CODE BEGIN 0 */
 
+ADC_Packet adc_packet1, adc_packet2;
 // cur 5mr, cur 500mr, cur 50r, voltage
-uint16_t adc_buf[ADC_TIMES][ADC_CHANELS];
+uint16_t adc_buf1[ADC_TIMES+1][ADC_CHANELS];
+uint16_t adc_buf2[ADC_TIMES+1][ADC_CHANELS];
 
 /* USER CODE END 0 */
 
@@ -100,7 +102,7 @@ void MX_ADC1_Init(void)
     Error_Handler();
   }
   /* USER CODE BEGIN ADC1_Init 2 */
-
+  __HAL_DMA_ENABLE_IT(&hdma_adc1, DMA_IT_TC); /*开启DMA传输完成中断*/
   /* USER CODE END ADC1_Init 2 */
 
 }
@@ -144,7 +146,7 @@ void HAL_ADC_MspInit(ADC_HandleTypeDef* adcHandle)
     hdma_adc1.Init.MemInc = DMA_MINC_ENABLE;
     hdma_adc1.Init.PeriphDataAlignment = DMA_PDATAALIGN_HALFWORD;
     hdma_adc1.Init.MemDataAlignment = DMA_MDATAALIGN_HALFWORD;
-    hdma_adc1.Init.Mode = DMA_CIRCULAR;
+    hdma_adc1.Init.Mode = DMA_NORMAL;
     hdma_adc1.Init.Priority = DMA_PRIORITY_LOW;
     hdma_adc1.Init.FIFOMode = DMA_FIFOMODE_DISABLE;
     if (HAL_DMA_Init(&hdma_adc1) != HAL_OK)