diff --git a/inc/dlt645.h b/inc/dlt645.h
index d628c78..beae797 100644
--- a/inc/dlt645.h
+++ b/inc/dlt645.h
@@ -3,8 +3,8 @@
 
 #include <stdint.h>
 
-#define DL645_MAX_READ_LEN 200 //读数据的最大数据长度
-#define DL645_MAX_WRITE_LEN 50 //写数据的最大数据长度
+#define DLT645_MAX_READ_LEN 200 //读数据的最大数据长度
+#define DLT645_MAX_WRITE_LEN 50 //写数据的最大数据长度
 
 // port setting
 #define DLT645_DEFAULT_RESPONSE_TIMEOUT 500 //500ms
diff --git a/inc/dlt645_1997_private.h b/inc/dlt645_1997_private.h
index fe6d148..d02a3ea 100644
--- a/inc/dlt645_1997_private.h
+++ b/inc/dlt645_1997_private.h
@@ -1,7 +1,7 @@
 #ifndef __DLT645_1997_PRIVATE_H
 #define __DLT645_1997_PRIVATE_H
 
-#define DL645_1997_RD_CMD_LEN 14 //读取数据命令的长度
+#define DLT645_1997_RD_CMD_LEN 14 //读取数据命令的长度
 
 //功能码
 #define C_1997_CODE_BRC 0x08    //广播校时
diff --git a/inc/dlt645_2007_private.h b/inc/dlt645_2007_private.h
index 9211c13..1c9a590 100644
--- a/inc/dlt645_2007_private.h
+++ b/inc/dlt645_2007_private.h
@@ -3,7 +3,7 @@
 
 #include "dlt645_private.h"
 
-#define DL645_2007_RD_CMD_LEN (DL645_PREMBLE_LEN + 16) //读取数据命令的长度
+#define DLT645_2007_RD_CMD_LEN (DLT645_PREMBLE_LEN + 16) //读取数据命令的长度
 
 //功能码
 #define C_2007_CODE_BRC 0x08    //广播校时
diff --git a/inc/dlt645_private.h b/inc/dlt645_private.h
index 805308a..8110dbb 100644
--- a/inc/dlt645_private.h
+++ b/inc/dlt645_private.h
@@ -9,23 +9,23 @@
 #define DLT645_LOG(...)
 #endif
 
-#define DL645_START_CODE 0x68
-#define DL645_STOP_CODE 0x16
+#define DLT645_START_CODE 0x68
+#define DLT645_STOP_CODE 0x16
 
-#define DL645_GADDR_CODE 0xAA   //万能地址码
-#define DL645_PREMBLE_CODE 0xFE //前导码
+#define DLT645_GADDR_CODE 0xAA   //万能地址码
+#define DLT645_PREMBLE_CODE 0xFE //前导码
 
-#define DL645_PREMBLE_LEN 0 //前导码长度
-#define DL645_ADDR_LEN 6    //设备地址长度
+#define DLT645_PREMBLE_LEN 0 //前导码长度
+#define DLT645_ADDR_LEN 6    //设备地址长度
 
-#define DL645_START_POS (DL645_PREMBLE_LEN + 0)
-#define DL645_ADDR_POS (DL645_PREMBLE_LEN + 1)    //设备地址
-#define DL645_CONTROL_POS (DL645_PREMBLE_LEN + 8) //控制码位置
-#define DL645_LEN_POS (DL645_PREMBLE_LEN + 9)     //长度位置
-#define DL645_DATA_POS (DL645_PREMBLE_LEN + 10)   //数据位置
+#define DLT645_START_POS (DLT645_PREMBLE_LEN + 0)
+#define DLT645_ADDR_POS (DLT645_PREMBLE_LEN + 1)    //设备地址
+#define DLT645_CONTROL_POS (DLT645_PREMBLE_LEN + 8) //控制码位置
+#define DLT645_LEN_POS (DLT645_PREMBLE_LEN + 9)     //长度位置
+#define DLT645_DATA_POS (DLT645_PREMBLE_LEN + 10)   //数据位置
 
-#define DL645_WR_LEN 50     //写入数据命令的长度
-#define DL645_RESP_LEN 60   //读取数据命令的长度
+#define DLT645_WR_LEN 50     //写入数据命令的长度
+#define DLT645_RESP_LEN 60   //读取数据命令的长度
 
 #define C_TD_MASK 0x80      //主从标志位
 #define C_TD_POS 7          //主从标志位比特位
diff --git a/readme.md b/readme.md
index e8636d8..789b521 100644
--- a/readme.md
+++ b/readme.md
@@ -453,7 +453,7 @@ MSH_CMD_EXPORT(dlt645_test, dlt645 test);
 1. 目前插件不支持自动识别前导码，不会自动拼包或者过滤处理；
 2. 如果串口有数据输出和输入但是打印读取失败，考虑是前导码的问题，不同厂商的仪表会有长度不一的前导码。
  - 可以用PC工具发送68开头的数据：68 AA AA AA AA AA AA 68  11 04 33 34 34 35 B1 16
- - 返回的报文68开头前的FE个数就是前导码的长度，然后配置DL645_PREMBLE_LEN即可。
+ - 返回的报文68开头前的FE个数就是前导码的长度，然后配置DLT645_PREMBLE_LEN即可。
 
 ## 支持
 
diff --git a/src/dlt645.c b/src/dlt645.c
index 588df52..f5d8114 100644
--- a/src/dlt645.c
+++ b/src/dlt645.c
@@ -55,10 +55,10 @@ int dlt645_receive_msg(dlt645_t *ctx, uint8_t *msg, uint16_t len, uint32_t code,
  */
 int dlt645_send_msg(dlt645_t *ctx, uint8_t *msg, int len)
 {
-    msg[DL645_START_POS] = DL645_START_CODE;
-    msg[DL645_START_POS + DL645_ADDR_LEN + 1] = DL645_START_CODE;
-    msg[len - 1] = DL645_STOP_CODE;
-    msg[len - 2] = _crc(msg + DL645_PREMBLE_LEN, len - DL645_PREMBLE_LEN - 2);
+    msg[DLT645_START_POS] = DLT645_START_CODE;
+    msg[DLT645_START_POS + DLT645_ADDR_LEN + 1] = DLT645_START_CODE;
+    msg[len - 1] = DLT645_STOP_CODE;
+    msg[len - 2] = _crc(msg + DLT645_PREMBLE_LEN, len - DLT645_PREMBLE_LEN - 2);
 
     return ctx->write(ctx, msg, len);
 }
@@ -81,7 +81,7 @@ void dlt645_set_addr(dlt645_t *ctx, uint8_t *addr)
     {
         addr_temp[5 - i] = addr[i];
     }
-    memcpy(ctx->addr, addr_temp, DL645_ADDR_LEN);
+    memcpy(ctx->addr, addr_temp, DLT645_ADDR_LEN);
 }
 
 /**
diff --git a/src/dlt645_1997.c b/src/dlt645_1997.c
index be58bdc..bcbe64f 100644
--- a/src/dlt645_1997.c
+++ b/src/dlt645_1997.c
@@ -29,7 +29,7 @@ int dlt645_1997_recv_check(uint8_t *msg, int len, uint8_t* addr, uint32_t code)
     {
         return -1;
     }
-    if (msg[DL645_CONTROL_POS] == 0x84)
+    if (msg[DLT645_CONTROL_POS] == 0x84)
         return 0;
 
     uint8_t *code_buf = (uint8_t *)&code;
@@ -39,7 +39,7 @@ int dlt645_1997_recv_check(uint8_t *msg, int len, uint8_t* addr, uint32_t code)
         code_buf[i] += 0x33;
     }
 
-    if (*((uint16_t *)(msg + DL645_DATA_POS)) != code)
+    if (*((uint16_t *)(msg + DLT645_DATA_POS)) != code)
         return -1;
 
     return 0;
@@ -110,32 +110,32 @@ int dlt645_1997_read_data(dlt645_t *ctx,
                           uint32_t code,
                           uint8_t *read_data)
 {
-    uint8_t send_buf[DL645_1997_RD_CMD_LEN];
-    uint8_t read_buf[DL645_RESP_LEN];
+    uint8_t send_buf[DLT645_1997_RD_CMD_LEN];
+    uint8_t read_buf[DLT645_RESP_LEN];
 
     memset(read_buf, 0, sizeof(read_buf));
     memset(send_buf, 0, sizeof(send_buf));
 
-    memcpy(send_buf + 1, ctx->addr, DL645_ADDR_LEN);
-    send_buf[DL645_CONTROL_POS] = C_1997_CODE_RD;
-    send_buf[DL645_LEN_POS] = 2;
+    memcpy(send_buf + 1, ctx->addr, DLT645_ADDR_LEN);
+    send_buf[DLT645_CONTROL_POS] = C_1997_CODE_RD;
+    send_buf[DLT645_LEN_POS] = 2;
 
     uint8_t send_code[2] = {0};
     send_code[0] = (code & 0xff) + 0x33;
     send_code[1] = ((code >> 8) & 0xff) + 0x33;
-    memcpy(send_buf + DL645_DATA_POS, send_code, 2);
+    memcpy(send_buf + DLT645_DATA_POS, send_code, 2);
 
-    if (dlt645_send_msg(ctx, send_buf, DL645_1997_RD_CMD_LEN) < 0)
+    if (dlt645_send_msg(ctx, send_buf, DLT645_1997_RD_CMD_LEN) < 0)
     {
         DLT645_LOG("send data error!\n");
         return -1;
     }
 
-    if (dlt645_receive_msg(ctx, read_buf, DL645_RESP_LEN, code, DLT645_1997) < 0)
+    if (dlt645_receive_msg(ctx, read_buf, DLT645_RESP_LEN, code, DLT645_1997) < 0)
     {
         DLT645_LOG("receive msg error!\n");
         return -1;
     }
 
-    return dlt645_1997_parsing_data(code, read_buf + DL645_DATA_POS + 2, read_buf[DL645_LEN_POS] - 2, read_data);
+    return dlt645_1997_parsing_data(code, read_buf + DLT645_DATA_POS + 2, read_buf[DLT645_LEN_POS] - 2, read_data);
 }
diff --git a/src/dlt645_2007.c b/src/dlt645_2007.c
index ea9ca8b..4bb4d0a 100644
--- a/src/dlt645_2007.c
+++ b/src/dlt645_2007.c
@@ -29,7 +29,7 @@ int dlt645_2007_recv_check(uint8_t *msg, int len, uint8_t * addr, uint32_t code)
     {
         return -1;
     }
-    if (msg[DL645_CONTROL_POS] == 0x94)
+    if (msg[DLT645_CONTROL_POS] == 0x94)
         return 0;
 
     uint8_t *code_buf = (uint8_t *)&code;
@@ -39,7 +39,7 @@ int dlt645_2007_recv_check(uint8_t *msg, int len, uint8_t * addr, uint32_t code)
         code_buf[i] += 0x33;
     }
 
-    if (*((uint32_t *)(msg + DL645_DATA_POS)) != code)
+    if (*((uint32_t *)(msg + DLT645_DATA_POS)) != code)
         return -1;
 
     return 0;
@@ -164,17 +164,17 @@ int dlt645_2007_read_data(dlt645_t *ctx,
                           uint32_t code,
                           uint8_t *read_data)
 {
-    uint8_t send_buf[DL645_2007_RD_CMD_LEN];
-    uint8_t read_buf[DL645_RESP_LEN];
+    uint8_t send_buf[DLT645_2007_RD_CMD_LEN];
+    uint8_t read_buf[DLT645_RESP_LEN];
 
     memset(read_buf, 0, sizeof(read_buf));
     memset(send_buf, 0, sizeof(send_buf));
 
-    memset(send_buf, DL645_PREMBLE_CODE, DL645_PREMBLE_LEN);
-    memcpy(send_buf + DL645_ADDR_POS, ctx->addr, DL645_ADDR_LEN);
+    memset(send_buf, DLT645_PREMBLE_CODE, DLT645_PREMBLE_LEN);
+    memcpy(send_buf + DLT645_ADDR_POS, ctx->addr, DLT645_ADDR_LEN);
 
-    send_buf[DL645_CONTROL_POS] = C_2007_CODE_RD;
-    send_buf[DL645_LEN_POS] = 4;
+    send_buf[DLT645_CONTROL_POS] = C_2007_CODE_RD;
+    send_buf[DLT645_LEN_POS] = 4;
 
     uint8_t send_code[4] = {0};
     send_code[0] = (code & 0xff) + 0x33;
@@ -182,21 +182,21 @@ int dlt645_2007_read_data(dlt645_t *ctx,
     send_code[2] = ((code >> 16) & 0xff) + 0x33;
     send_code[3] = ((code >> 24) & 0xff) + 0x33;
 
-    memcpy(send_buf + DL645_DATA_POS, send_code, 4);
+    memcpy(send_buf + DLT645_DATA_POS, send_code, 4);
 
-    if (dlt645_send_msg(ctx, send_buf, DL645_2007_RD_CMD_LEN) < 0)
+    if (dlt645_send_msg(ctx, send_buf, DLT645_2007_RD_CMD_LEN) < 0)
     {
         DLT645_LOG("send data error!\n");
         return -1;
     }
 
-    if (dlt645_receive_msg(ctx, read_buf, DL645_RESP_LEN, code, DLT645_2007) < 0)
+    if (dlt645_receive_msg(ctx, read_buf, DLT645_RESP_LEN, code, DLT645_2007) < 0)
     {
         DLT645_LOG("receive msg error!\n");
         return -1;
     }
 
-    return dlt645_2007_parsing_data(code, read_buf + DL645_DATA_POS + 4, read_buf[DL645_LEN_POS] - 4, read_data);
+    return dlt645_2007_parsing_data(code, read_buf + DLT645_DATA_POS + 4, read_buf[DLT645_LEN_POS] - 4, read_data);
 }
 
 /**
@@ -216,16 +216,16 @@ int dlt645_write_data(dlt645_t *ctx,
                       uint8_t *write_data,
                       uint8_t write_len)
 {
-    uint8_t send_buf[DL645_WR_LEN];
-    uint8_t read_buf[DL645_RESP_LEN];
+    uint8_t send_buf[DLT645_WR_LEN];
+    uint8_t read_buf[DLT645_RESP_LEN];
 
     memset(read_buf, 0, sizeof(read_buf));
     memset(send_buf, 0, sizeof(send_buf));
 
-    memcpy(send_buf + 1, ctx->addr, DL645_ADDR_LEN);
+    memcpy(send_buf + 1, ctx->addr, DLT645_ADDR_LEN);
 
-    send_buf[DL645_CONTROL_POS] = C_2007_CODE_WR;
-    send_buf[DL645_LEN_POS] = 12 + write_len;
+    send_buf[DLT645_CONTROL_POS] = C_2007_CODE_WR;
+    send_buf[DLT645_LEN_POS] = 12 + write_len;
 
     uint8_t send_code[4] = {0};
     send_code[0] = (code & 0xff) + 0x33;
@@ -238,15 +238,15 @@ int dlt645_write_data(dlt645_t *ctx,
         write_data[i] += 0x33;
     }
 
-    memcpy(send_buf + DL645_DATA_POS, send_code, 4);
-    memcpy(send_buf + DL645_DATA_POS + 12, write_data, write_len);
+    memcpy(send_buf + DLT645_DATA_POS, send_code, 4);
+    memcpy(send_buf + DLT645_DATA_POS + 12, write_data, write_len);
     if (dlt645_send_msg(ctx, send_buf, 24 + write_len) < 0)
     {
         DLT645_LOG("send data error!\n");
         return -1;
     }
 
-    if (dlt645_receive_msg(ctx, read_buf, DL645_RESP_LEN, code, DLT645_2007) < 0)
+    if (dlt645_receive_msg(ctx, read_buf, DLT645_RESP_LEN, code, DLT645_2007) < 0)
     {
         DLT645_LOG("receive msg error!\n");
         return -1;
diff --git a/src/dlt645_data.c b/src/dlt645_data.c
index 50f731b..92442f4 100644
--- a/src/dlt645_data.c
+++ b/src/dlt645_data.c
@@ -56,39 +56,39 @@ int dlt645_common_check(uint8_t *msg, int len, uint8_t *addr)
         return -1;
     }
     //数据帧标志校验
-    if (msg[DL645_START_POS] != DL645_START_CODE ||
-        msg[DL645_START_POS + DL645_ADDR_LEN + 1] != DL645_START_CODE ||
-        msg[len - 1] != DL645_STOP_CODE)
+    if (msg[DLT645_START_POS] != DLT645_START_CODE ||
+        msg[DLT645_START_POS + DLT645_ADDR_LEN + 1] != DLT645_START_CODE ||
+        msg[len - 1] != DLT645_STOP_CODE)
     {
         DLT645_LOG("check code error!\n");
         return -1;
     }
     //CRC校验
-    uint8_t crc = _crc(msg + DL645_PREMBLE_LEN, len - DL645_PREMBLE_LEN - 2);
+    uint8_t crc = _crc(msg + DLT645_PREMBLE_LEN, len - DLT645_PREMBLE_LEN - 2);
     if (crc != msg[len - 2])
     {
         DLT645_LOG("check crc error!\n");
         return -1;
     }
     //控制码主从校验
-    if ((msg[DL645_CONTROL_POS] & C_TD_MASK) == (C_TD_MASTER << C_TD_POS))
+    if ((msg[DLT645_CONTROL_POS] & C_TD_MASK) == (C_TD_MASTER << C_TD_POS))
     {
         DLT645_LOG("check control direction error!\n");
         return -1;
     }
     //控制码应答校验
-    if ((msg[DL645_CONTROL_POS] & C_ACK_MASK) == (C_ACK_ERR << C_ACK_POS))
+    if ((msg[DLT645_CONTROL_POS] & C_ACK_MASK) == (C_ACK_ERR << C_ACK_POS))
     {
         DLT645_LOG("check ACK error!\n");
         return msg[len - 3];
     }
     //从站地址校验
-    if (memcmp(msg + DL645_ADDR_POS, addr, 6) != 0)
+    if (memcmp(msg + DLT645_ADDR_POS, addr, 6) != 0)
     {
         // 万能地址无需校验
         for(int i = 0; i < 6; i++)
         {
-            if(addr[i] != DL645_GADDR_CODE)
+            if(addr[i] != DLT645_GADDR_CODE)
             {
                 return -1;
             }