16进制和ASCII的互相转换
ztj100 2024-11-24 01:32 13 浏览 0 评论
/*
16进制和ASCII的互相转换
*/
#include <string.h>
#include <stdio.h>
#include <errno.h>
#include <stdlib.h>
typedef double flo64; // Double precision floating point
typedef double * pflo64;
typedef float flo32; // Single precision floating point
typedef float * pflo32;
typedef signed int int32s; // Signed 32 bit quantity
typedef signed int * pint32s;
typedef unsigned int int32u; // Unsigned 32 bit quantity
typedef unsigned int * pint32u;
typedef signed short int16s; // Signed 16 bit quantity
typedef signed short* pint16s;
typedef unsigned short int16u; // Unsigned 16 bit quantity
typedef unsigned short* pint16u;
typedef signed char int8s; // Signed 8 bit quantity
typedef signed char * pint8s;
typedef unsigned char int8u; // Unsigned 8 bit quantity
typedef unsigned char * pint8u;
#define MAX_FRAM_LEN 256
unsigned char halfbyte_2ascii_biggercase(unsigned char half_byte)
{
//printf("1half_byte:%02x\n", half_byte);
//printf("1half_byte:%02x, %c\n", half_byte + '0', half_byte + '0');
//大写形式
if(half_byte >= 9) //0xa的十进制是10.字符'A'的16进制为0x41， 字符'a'的16进制为0x61，
half_byte += 39;
//printf("2half_byte:%02x\n", half_byte);
//printf("2half_byte + '0':%02x,%c\n", half_byte + '0', half_byte + '0');
return half_byte + '0';
}
unsigned char halfbyte_2ascii_lowercase(unsigned char half_byte)
{
//printf("1half_byte:%02x\n", half_byte);
//printf("1half_byte:%02x, %c\n", half_byte + '0', half_byte + '0');
#if 1
//大写形式
if(half_byte >= 9) //0xa的十进制是10.字符'A'的16进制为0x41， 字符'a'的16进制为0x61，
half_byte += 7;
#endif
//printf("2half_byte:%02x\n", half_byte);
//printf("2half_byte + '0':%02x,%c\n", half_byte + '0', half_byte + '0');
return half_byte + '0';
}
/*
16进制转16进制ASCII(大写)
hex 30 30 30 33 30 30 32 30 30 30 30 32 3d 3b ==>ascii hex: 30 30 30 33 30 30 32 30 30 30 30 32 64 62
示例：unsigned char ascii1[30]={0};
unsigned char ascii2[30]={0};
int ascii1_len = 7;
int ascii2_len = 7;
memcpy(ascii1, "\x00\x03\x00\x20\x00\x02\xdb", ascii1_len);
memcpy(ascii2, "\x00\x03\x00\x20\x00\x02\xdb", ascii2_len);
hex2ascii_lowercase(ascii1, &ascii1_len);
printf("ascii1_len:%d,%02x\n", ascii1_len, ascii1_len);
for(int i = 0; i< ascii1_len; i++)
{
printf("%02x ", ascii1[i]);
}
printf("\n");
hex2ascii_biggercase(ascii2, &ascii2_len);
printf("ascii2_len:%d,%02x\n", ascii2_len, ascii2_len);
for(int i = 0; i< ascii2_len; i++)
{
printf("%02x ", ascii2[i]);
}
printf("\n");
结果：
ascii1_len:14,0e
30 30 30 33 30 30 32 30 30 30 30 32 44 42
ascii2_len:14,0e
30 30 30 33 30 30 32 30 30 30 30 32 64 62
*/
unsigned char hex2ascii_biggercase(unsigned char *pbuf,unsigned int *count)
{
unsigned char temp1,temp2,*pdata;
unsigned int i = 0,j = 0,sum;
if(pbuf == 0 || count == 0 || *count == 0) return 1;
if((pdata = (unsigned char *)malloc((*count+1)*sizeof(unsigned char))) == NULL) return 2; //内存申请,目前采用堆空间,长度512字节
sum = (*count);
/*每个字节用2个ASCII表示*/
for(i = 0; i < sum; i++)
{
temp1 = ((pbuf[i] & 0xF0) >> 4);
temp2 = (pbuf[i] & 0x0F);
pdata[j++] = halfbyte_2ascii_biggercase(temp1);
pdata[j++] = halfbyte_2ascii_biggercase(temp2);
}
*count = j; //转译后的总长度
memcpy(&pbuf[0],pdata,j); //转译后内容拷贝
/*释放内存*/
free(pdata);
pdata = NULL;
return 0;
}
/*
16进制转16进制ASCII(小写)
hex 3a 00 03 00 20 00 02 db 0d 0a ==>ascii hex: 30 30 30 33 30 30 32 30 30 30 30 32 44 42
示例：
unsigned char ascii1[30]={0};
unsigned char ascii2[30]={0};
int ascii1_len = 7;
int ascii2_len = 7;
memcpy(ascii1, "\x00\x03\x00\x20\x00\x02\xdb", ascii1_len);
memcpy(ascii2, "\x00\x03\x00\x20\x00\x02\xdb", ascii2_len);
hex2ascii_lowercase(ascii1, &ascii1_len);
printf("ascii1_len:%d,%02x\n", ascii1_len, ascii1_len);
for(int i = 0; i< ascii1_len; i++)
{
printf("%02x ", ascii1[i]);
}
printf("\n");
hex2ascii_biggercase(ascii2, &ascii2_len);
printf("ascii2_len:%d,%02x\n", ascii2_len, ascii2_len);
for(int i = 0; i< ascii2_len; i++)
{
printf("%02x ", ascii2[i]);
}
printf("\n");
结果：
ascii1_len:14,0e
30 30 30 33 30 30 32 30 30 30 30 32 44 42
ascii2_len:14,0e
30 30 30 33 30 30 32 30 30 30 30 32 64 62
*/
int8u hex2ascii_lowercase(int8u *pbuf,unsigned int *count)
{
int8u temp1,temp2,*pdata;
unsigned int i = 0,j = 0,sum;
if(pbuf == 0 || count == 0 || *count == 0) return 1;
if((pdata = (int8u *)malloc((*count+1)*sizeof(int8u))) == NULL) return 2; //内存申请,目前采用堆空间,长度512字节
sum = (*count);
/*每个字节用2个ASCII表示*/
for(i = 0; i < sum; i++)
{
temp1 = ((pbuf[i] & 0xF0) >> 4);
temp2 = (pbuf[i] & 0x0F);
pdata[j++] = halfbyte_2ascii_lowercase(temp1);
pdata[j++] = halfbyte_2ascii_lowercase(temp2);
}
*count = j; //转译后的总长度
memcpy(&pbuf[0],pdata,j); //转译后内容拷贝
/*释放内存*/
free(pdata);
pdata = NULL;
return 0;
}
/*
计算lrc校验，自研485温湿度用。
src:源字符串
start:起始下标
len:参数校验的有效数据长度
lrc:结果
示例：
unsigned char lsrc = 0;
unsigned char src[]="\x3A\x00\x03\x00\x20\x00\x02\xDB\x0D\x0A";
lsrc = count_lrc(src, 1, 6);
printf("lsrc:%d,%02x\n", lsrc, lsrc);
*/
unsigned char count_lrc(unsigned char *src, int start, int len)
{
unsigned char sum = 0;
unsigned char result = 0;
for(int i = start; i<= len; i++)
{
//printf("src[%d]:%d,%02x\n", i, src[i], src[i]);
sum+=src[i];
}
result = ~sum+1;
//printf("sum:%d,%02x\n", sum, sum);
//printf("result:%d,%02x\n", result, result);
return result;
}
/*
把modbus ascii数据转换成16进制（不改变原始数据）
pbuf：原始数据 16进制显示：3A 30 30 30 33 30 30 32 30 30 30 30 32 64 62 0D 0A ，对应字符串:000300200002db
src_len：原始数据长
dest：目标 16进制显示：3a 00 03 00 20 00 02 db 0d 0a
dest_len：目标长
例：
unsigned char p[]="\x3A\x30\x30\x30\x33\x30\x30\x32\x30\x30\x30\x30\x32\x64\x62\x0D\x0A";
int src_len = 17;
int dest_len = 0;
convert_modbus_ascii_2hex(p, src_len, dest, &dest_len);
printf("dest_len:%d,%02x\n", dest_len, dest_len);
for(int i = 0; i< dest_len; i++)
{
printf("%02x ", dest[i]);
}
printf("\n");
结果：
dest_len:10,0a
3a 00 03 00 20 00 02 db 0d 0a
*/
unsigned char convert_modbus_ascii_2hex(unsigned char *pbuf,int src_len, unsigned char *dest, int *dest_len)
{
int len_befor_after = 2;
unsigned char *pdata,temp1,temp2;
int32u i=0,j=0,sum=0;
if(pbuf==0 || src_len==0) return 1;
if((pdata = (unsigned char *)malloc((src_len+1)*sizeof(unsigned char))) == NULL) return 2; //内存申请,目前采用堆空间
memcpy(dest,pbuf,src_len);
sum = (src_len - len_befor_after); //帧头不参与
for(i = 1; i < sum; i+=2)
{
//printf("1pbuf[%d]:%02x\n", i, pbuf[i]);
switch(pbuf[i])
{
case 0x20: //代表空格
temp1 = 0x00;
break;
case 0x30:
temp1 = 0x00;
break;
case 0x31:
temp1 = 0x01;
break;
case 0x32:
temp1 = 0x02;
break;
case 0x33:
temp1 = 0x03;
break;
case 0x34:
temp1 = 0x04;
break;
case 0x35:
temp1 = 0x05;
break;
case 0x36:
temp1 = 0x06;
break;
case 0x37:
temp1 = 0x07;
break;
case 0x38:
temp1 = 0x08;
break;
case 0x39:
temp1 = 0x09;
break;
case 0x41:
temp1 = 0x0A;
break;
case 0x42:
temp1 = 0x0B;
break;
case 0x43:
temp1 = 0x0C;
break;
case 0x44:
temp1 = 0x0D;
break;
case 0x45:
temp1 = 0x0E;
break;
case 0x46:
temp1 = 0x0F;
break;
case 0x61:
temp1 = 0x0a;
break;
case 0x62:
temp1 = 0x0b;
break;
case 0x63:
temp1 = 0x0c;
break;
case 0x64:
temp1 = 0x0d;
break;
case 0x65:
temp1 = 0x0e;
break;
case 0x66:
temp1 = 0x0f;
break;
default:
temp1 = 0;
break;
}
//printf("2pbuf[%d]:%02x\n", i+1, pbuf[i+1]);
switch(pbuf[i+1])
{
case 0x20: //代表空格
temp2 = 0x00;
break;
case 0x30:
temp2 = 0x00;
break;
case 0x31:
temp2 = 0x01;
break;
case 0x32:
temp2 = 0x02;
break;
case 0x33:
temp2 = 0x03;
break;
case 0x34:
temp2 = 0x04;
break;
case 0x35:
temp2 = 0x05;
break;
case 0x36:
temp2 = 0x06;
break;
case 0x37:
temp2 = 0x07;
break;
case 0x38:
temp2 = 0x08;
break;
case 0x39:
temp2 = 0x09;
break;
case 0x41:
temp2 = 0x0A;
break;
case 0x42:
temp2 = 0x0B;
break;
case 0x43:
temp2 = 0x0C;
break;
case 0x44:
temp2 = 0x0D;
break;
case 0x45:
temp2 = 0x0E;
break;
case 0x46:
temp2 = 0x0F;
break;
case 0x61:
temp2 = 0x0a;
break;
case 0x62:
temp2 = 0x0b;
break;
case 0x63:
temp2 = 0x0c;
break;
case 0x64:
temp2 = 0x0d;
break;
case 0x65:
temp2 = 0x0e;
break;
case 0x66:
temp2 = 0x0f;
break;
default:
temp2 = 0;
break;
}
pdata[j++] = ((temp1 & 0x0F) << 4 | temp2); //2个ASCII合并为1个16进制
//printf("temp1:%02x\n", temp1);
//printf("temp2:%02x\n", temp2);
//printf("3pdata[%d]:%02x\n", j-1, pdata[j-1]);
}
#if 0
//计算校验
unsigned char lsrc = count_lrc(pdata, 1, 6);
pdata[j-1] = lsrc;
#endif
/*添加帧尾,构成原始帧数据*/
pdata[j++] = 0x0D;
pdata[j++] = 0x0A;
*dest_len = (j+1); //再添加帧头1个字节
/*帧头不参与处理*/
memcpy(&dest[1],pdata,j);
/*释放内存*/
free(pdata);
pdata = NULL;
return 0;
}
/*
把modbus ascii数据转换成16进制（改变原始数据和长度）
pbuf：原始数据 16进制显示：3A 30 30 30 33 30 30 32 30 30 30 30 32 64 62 0D 0A ，对应字符串:000300200002db 转换结果--》3a 00 03 00 20 00 02 db 0d 0a
src_len：原始数据长，结果会改变长度
例：
unsigned char p2[]="\x3A\x30\x30\x30\x33\x30\x30\x32\x30\x30\x30\x30\x32\x64\x62\x0D\x0A";
int len = 17;
convert_modbus_ascii_2hex_changesrc(p2, &len);
printf("len:%d,%02x\n", len, len);
for(int i = 0; i< len; i++)
{
printf("%02x ", p2[i]);
}
printf("\n");
结果：
dest_len:10,0a
3a 00 03 00 20 00 02 db 0d 0a
*/
unsigned char convert_modbus_ascii_2hex_changesrc(unsigned char *pbuf,int *src_len)
{
int len_befor_after = 2;
unsigned char *pdata,temp1,temp2;
int32u i=0,j=0,sum=0;
if(pbuf==0 || src_len==NULL || *src_len==0) return 1;
if((pdata = (unsigned char *)malloc((*src_len+1)*sizeof(unsigned char))) == NULL) return 2; //内存申请,目前采用堆空间
sum = (*src_len - len_befor_after); //帧头不参与
for(i = 1; i < sum; i+=2)
{
//printf("1pbuf[%d]:%02x\n", i, pbuf[i]);
switch(pbuf[i])
{
case 0x20: //代表空格
temp1 = 0x00;
break;
case 0x30:
temp1 = 0x00;
break;
case 0x31:
temp1 = 0x01;
break;
case 0x32:
temp1 = 0x02;
break;
case 0x33:
temp1 = 0x03;
break;
case 0x34:
temp1 = 0x04;
break;
case 0x35:
temp1 = 0x05;
break;
case 0x36:
temp1 = 0x06;
break;
case 0x37:
temp1 = 0x07;
break;
case 0x38:
temp1 = 0x08;
break;
case 0x39:
temp1 = 0x09;
break;
case 0x41:
temp1 = 0x0A;
break;
case 0x42:
temp1 = 0x0B;
break;
case 0x43:
temp1 = 0x0C;
break;
case 0x44:
temp1 = 0x0D;
break;
case 0x45:
temp1 = 0x0E;
break;
case 0x46:
temp1 = 0x0F;
break;
case 0x61:
temp1 = 0x0a;
break;
case 0x62:
temp1 = 0x0b;
break;
case 0x63:
temp1 = 0x0c;
break;
case 0x64:
temp1 = 0x0d;
break;
case 0x65:
temp1 = 0x0e;
break;
case 0x66:
temp1 = 0x0f;
break;
default:
temp1 = 0;
break;
}
//printf("2pbuf[%d]:%02x\n", i+1, pbuf[i+1]);
switch(pbuf[i+1])
{
case 0x20: //代表空格
temp2 = 0x00;
break;
case 0x30:
temp2 = 0x00;
break;
case 0x31:
temp2 = 0x01;
break;
case 0x32:
temp2 = 0x02;
break;
case 0x33:
temp2 = 0x03;
break;
case 0x34:
temp2 = 0x04;
break;
case 0x35:
temp2 = 0x05;
break;
case 0x36:
temp2 = 0x06;
break;
case 0x37:
temp2 = 0x07;
break;
case 0x38:
temp2 = 0x08;
break;
case 0x39:
temp2 = 0x09;
break;
case 0x41:
temp2 = 0x0A;
break;
case 0x42:
temp2 = 0x0B;
break;
case 0x43:
temp2 = 0x0C;
break;
case 0x44:
temp2 = 0x0D;
break;
case 0x45:
temp2 = 0x0E;
break;
case 0x46:
temp2 = 0x0F;
break;
case 0x61:
temp2 = 0x0a;
break;
case 0x62:
temp2 = 0x0b;
break;
case 0x63:
temp2 = 0x0c;
break;
case 0x64:
temp2 = 0x0d;
break;
case 0x65:
temp2 = 0x0e;
break;
case 0x66:
temp2 = 0x0f;
break;
default:
temp2 = 0;
break;
}
pdata[j++] = ((temp1 & 0x0F) << 4 | temp2); //2个ASCII合并为1个16进制
//printf("temp1:%02x\n", temp1);
//printf("temp2:%02x\n", temp2);
//printf("3pdata[%d]:%02x\n", j-1, pdata[j-1]);
}
#if 0
//计算校验
unsigned char lsrc = count_lrc(pdata, 1, 6);
pdata[j-1] = lsrc;
#endif
/*添加帧尾,构成原始帧数据*/
pdata[j++] = 0x0D;
pdata[j++] = 0x0A;
*src_len = (j+1); //再添加帧头1个字节
/*帧头不参与处理*/
memcpy(&pbuf[1],pdata,j);
/*释放内存*/
free(pdata);
pdata = NULL;
return 0;
}
int main(int argc, char *argv[])
{
//===1======16进制ASCII 转16进制测试===============//
unsigned char lsrc = 0;
unsigned char src[]="\x3A\x00\x03\x00\x20\x00\x02\xDB\x0D\x0A";
lsrc = count_lrc(src, 1, 6);
printf("lsrc:%d,%02x\n", lsrc, lsrc);
unsigned char dest[512] = {0};
//3A 30 30 30 33 30 30 32 30 30 30 30 32 64 62 0D 0A //:000300200002db
unsigned char p[]="\x3A\x30\x30\x30\x33\x30\x30\x32\x30\x30\x30\x30\x32\x64\x62\x0D\x0A";
int src_len = 17;
int dest_len = 0;
convert_modbus_ascii_2hex(p, src_len, dest, &dest_len);
printf("dest_len:%d,%02x\n", dest_len, dest_len);
for(int i = 0; i< dest_len; i++)
{
printf("%02x ", dest[i]);
}
printf("\n");
unsigned char p2[]="\x3A\x30\x30\x30\x33\x30\x30\x32\x30\x30\x30\x30\x32\x64\x62\x0D\x0A";
int len = 17;
convert_modbus_ascii_2hex_changesrc(p2, &len);
printf("len:%d,%02x\n", len, len);
for(int i = 0; i< len; i++)
{
printf("%02x ", p2[i]);
}
printf("\n");
//===2======16进制转16进制ASCII测试===============//
unsigned char ascii1[30]={0};
unsigned char ascii2[30]={0};
int ascii1_len = 7;
int ascii2_len = 7;
memcpy(ascii1, "\x00\x03\x00\x20\x00\x02\xdb", ascii1_len);
memcpy(ascii2, "\x00\x03\x00\x20\x00\x02\xdb", ascii2_len);
hex2ascii_lowercase(ascii1, &ascii1_len);
printf("ascii1_len:%d,%02x\n", ascii1_len, ascii1_len);
for(int i = 0; i< ascii1_len; i++)
{
printf("%02x ", ascii1[i]);
}
printf("\n");
hex2ascii_biggercase(ascii2, &ascii2_len);
printf("ascii2_len:%d,%02x\n", ascii2_len, ascii2_len);
for(int i = 0; i< ascii2_len; i++)
{
printf("%02x ", ascii2[i]);
}
printf("\n");
return 0;
}
相关推荐
- 告别手动操作:一键多工作表合并的实用方法
-
通常情况下，我们需要将同一工作簿内不同工作表中的数据进行合并处理。如何快速有效地完成这些数据的整合呢？这主要取决于需要合并的源数据的结构。...
- 【MySQL技术专题】「优化技术系列」常用SQL的优化方案和技术思路
-
概述前面我们介绍了MySQL中怎么样通过索引来优化查询。日常开发中，除了使用查询外，我们还会使用一些其他的常用SQL，比如INSERT、GROUPBY等。对于这些SQL语句，我们该怎么样进行优化呢...
- 9.7寸视网膜屏原道M9i双系统安装教程
-
泡泡网平板电脑频道4月17日原道M9i采用Win8安卓双系统，对于喜欢折腾的朋友来说，刷机成了一件难事，那么原道M9i如何刷机呢？下面通过详细地图文，介绍原道M9i的刷机操作过程，在刷机的过程中，要...
- 如何做好分布式任务调度——Scheduler 的一些探索
-
作者：张宇轩，章逸，曾丹初识Scheduler找准定位：分布式任务调度平台...
- mysqldump备份操作大全及相关参数详解
-
mysqldump简介mysqldump是用于转储MySQL数据库的实用程序，通常我们用来迁移和备份数据库；它自带的功能参数非常多，文中列举出几乎所有常用的导出操作方法，在文章末尾将所有的参数详细说明...
- 大厂面试冲刺，Java“实战”问题三连，你碰到了哪个?
-
推荐学习...
- 亿级分库分表，如何丝滑扩容、如何双写灰度
-
以下是基于亿级分库分表丝滑扩容与双写灰度设计方案，结合架构图与核心流程说明：一、总体设计目标...
- MYSQL表设计规范（mysql表设计原则）
-
日常工作总结，不是通用规范一、表设计库名、表名、字段名必须使用小写字母，“_”分割。...
- 怎么解决MySQL中的Duplicate entry错误?
-
在使用MySQL数据库时，我们经常会遇到Duplicateentry错误，这是由于插入或更新数据时出现了重复的唯一键值。这种错误可能会导致数据的不一致性和完整性问题。为了解决这个问题，我们可以采取以...
- 高并发下如何防重?（高并发如何防止重复）
-
前言最近测试给我提了一个bug，说我之前提供的一个批量复制商品的接口，产生了重复的商品数据。...
- 性能压测数据告诉你MySQL和MariaDB该怎么选
-
1.压测环境为了尽可能的客观公正，本次选择同一物理机上的两台虚拟机，一台用作数据库服务器，一台用作运行压测工具mysqlslap，操作系统均为UbuntuServer22.04LTS。...
- 屠龙之技 --sql注入 不值得浪费超过十天 实战中sqlmap--lv 3通杀全国
-
MySQL小结发表于2020-09-21分类于知识整理阅读次数：本文字数：67k阅读时长≈1:01...
- 破防了，谁懂啊家人们:记一次 mysql 问题排查
-
作者：温粥一、前言谁懂啊家人们，作为一名java开发，原来以为mysql这东西，写写CRUD，不是有手就行吗；你说DDL啊，不就是设计个表结构，搞几个索引吗。...
- MySQL 之 Performance Schema（mysql安装及配置超详细教程）
-
MySQL之PerformanceSchema介绍PerformanceSchema提供了在数据库运行时实时检查MySQL服务器的内部执行情况的方法，通过监视MySQL服务器的事件来实现监视内...
欢迎 你 发表评论:
- 一周热门
- 最近发表
- 标签列表
-
- idea eval reset (50)
- vue dispatch (70)
- update canceled (42)
- order by asc (53)
- spring gateway (67)
- 简单代码编程 贪吃蛇 (40)
- transforms.resize (33)
- redisson trylock (35)
- 卸载node (35)
- np.reshape (33)
- torch.arange (34)
- node卸载 (33)
- npm 源 (35)
- vue3 deep (35)
- win10 ssh (35)
- exceptionininitializererror (33)
- vue foreach (34)
- idea设置编码为utf8 (35)
- vue 数组添加元素 (34)
- std find (34)
- tablefield注解用途 (35)
- python str转json (34)
- java websocket客户端 (34)
- tensor.view (34)
- java jackson (34)