diff --git a/app/uart.c b/app/uart.c
index 7ca3caa..3e0aa69 100644
--- a/app/uart.c
+++ b/app/uart.c
@@ -512,8 +512,13 @@ bool UART_IsCommandAvailable(void)
 
     CRC = UART_Command.Buffer[Size] | (UART_Command.Buffer[Size + 1] << 8);
 //    char b[2]="3K";
-    UART_Send(UART_Command.Buffer, Size);
-    return (CRC_Calculate(UART_Command.Buffer, Size) != CRC) ? false : true;
+//     uint8_t tmp[Size];
+//    for (int i = 0; i < Size; i++) {
+//        tmp[i]=UART_Command.Buffer[i];
+//    }
+
+
+    return (CRC_Calculate(UART_Command.Buffer, Size)!= CRC) ? false : true;
 }
 
 void UART_HandleCommand(void)
diff --git a/driver/crc.c b/driver/crc.c
index e839d55..dea6fbe 100644
--- a/driver/crc.c
+++ b/driver/crc.c
@@ -16,6 +16,7 @@
 
 #include "bsp/dp32g030/crc.h"
 #include "driver/crc.h"
+#include "driver/uart.h"
 
 void CRC_Init(void)
 {
@@ -47,20 +48,40 @@ void CRC_InitReverse(void)
 		CRC_IV = 0;
 	}
 #endif
-uint16_t CRC_Calculate(const void *pBuffer, uint16_t Size)
-{
-	const uint8_t *pData = (const uint8_t *)pBuffer;
-	uint16_t i, Crc;
+// uint16_t CRC_Calculate(const void *pBuffer, uint16_t Size)
+//{
+//    const uint8_t *pData = (const uint8_t *)pBuffer;
+//    uint16_t i, Crc;
+//    UART_Send(pData, Size);
+//
+//    CRC_CR = (CRC_CR & ~CRC_CR_CRC_EN_MASK) | CRC_CR_CRC_EN_BITS_ENABLE;
+//    UART_Send(pData, Size);
+//
+//    for (i = 0; i < Size; i++) {
+//        CRC_DATAIN = pData[i];
+//    }
+//    Crc = (uint16_t)CRC_DATAOUT;
+//
+//    CRC_CR = (CRC_CR & ~CRC_CR_CRC_EN_MASK) | CRC_CR_CRC_EN_BITS_DISABLE;
+//
+//    return Crc;
+//}
+#define CRC16_XMODEM_POLY 0x1021
 
-	CRC_CR = (CRC_CR & ~CRC_CR_CRC_EN_MASK) | CRC_CR_CRC_EN_BITS_ENABLE;
+uint16_t CRC_Calculate(const void *pBuffer, uint16_t Size) {
+    const uint8_t *pData = (const uint8_t *)pBuffer;
+    uint16_t crc = 0; // 初始CRC值为0
 
-	for (i = 0; i < Size; i++) {
-		CRC_DATAIN = pData[i];
-	}
-	Crc = (uint16_t)CRC_DATAOUT;
+    while (Size--) {
+        crc ^= (*pData++) << 8; // 将数据字节的最高位与CRC异或
+        for (uint8_t i = 0; i < 8; i++) {
+            if (crc & 0x8000) { // 检查最高位是否为1
+                crc = (crc << 1) ^ CRC16_XMODEM_POLY; // 如果最高位为1，执行CRC多项式计算
+            } else {
+                crc = crc << 1; // 如果最高位为0，继续左移
+            }
+        }
+    }
 
-	CRC_CR = (CRC_CR & ~CRC_CR_CRC_EN_MASK) | CRC_CR_CRC_EN_BITS_DISABLE;
-
-	return Crc;
+    return crc;
 }
-
diff --git a/driver/crc.h b/driver/crc.h
index cf192ee..2cda491 100644
--- a/driver/crc.h
+++ b/driver/crc.h
@@ -20,7 +20,7 @@
 #include <stdint.h>
 
 void CRC_Init(void);
-uint16_t CRC_Calculate(const void *pBuffer, uint16_t Size);
+ uint16_t CRC_Calculate(const void *pBuffer, uint16_t Size);
 void CRC_InitReverse(void);
 
 #endif