一. 简介
本文主要是bin文件的组成进行一些简单介绍，方便理解升级的过程。
二.硬件部分
2.1 rk3399cpu+gd32f103
2.2 连接方式：串口（115200，8N1）或者iic（本文没有介绍iic）
三、其他需要说明的软件部分
3.1 单片机端分两个部分：iap（用于升级）和app（自己的应用）部分（这两个部分本文不做介绍）。
3.2 linux端做一个升级的app软件，这里称为update_app，本文主要是介绍该软件。
3.3 升级单片机用的bin文件，由iap的bin与app的bin的一个组合文件。由combin.exe在keil编译时调用完成。（本文不介绍该软件）
3.4 单片机flash的分区情况
3.4.1 0 ~（0x5c00-1） ： iap程序区，用于存放iap程序
3.4.2 0x5c00~(0x6000-1) : 这个1k用于存放一些标志位，以及程序的md5
3.4.3 0x6000 ~（0x13000-1）： app程序区，单片机的实际功能程序区
3.4.4 0x13000 ~ (0x20000-1) : app程序下载时的缓存区，程序下载时不直接下载到app区，而是先缓存到下载区，下载成功（数据完成后，会进行md5校验）后，才会更新到app区。
四、combin程序部分
4.1 main函数，程序需要三个参数
参数1： iap的bin文件名
参数2：app的bin文件名
参数3：合并后的文件名。本来准备设计为可以不要第三个参数的，此时传入NULL，但是没有测试。
int main(int argc,char* argv[])
{
char* outfilename = NULL;
if(argc < 3){
printf("Usage : %s <file1.bin> <file2.bin> [outfilename]\n",argv[0]);
return -1;
}
if(argc >= 4)
{
outfilename = argv[3];
}
//第一个文件，与第二个文件合并，生成第三个文件，第三个可以不指定。
combin_file(argv[1],argv[2],outfilename);
return 0;
}
4.2 主要的combin_file函数
4.2.1 两个bin文件打开后，都进行了头部的识别工作，非bin文件应该不能正常合并。
4.2.2 这里还考虑了通用单片机合并的情况，就是对偏移的值是进行读取，并不是固定值。
4.2.3 我使用的时候都是传入了参数3的，所以如何去组合出输出文件名没有测试，可能功能不正常。这里要考虑的问题是相对路径和绝对路径，取出文件名这些，好像有点复杂。
void combin_file(char* file1,char* file2,char* outfilename)
{
FILE *fin1,*fin2;// *fout;
int size1 = 0,size2 = 0,total_size = 0;
char outnamebuf[64] = {0};
uint16_t posision = 0; //位置
int bw = 0;
int readcount = 0;
int ret,i;
int lcd_inch = 0;
if(file1== NULL || file2 == NULL)
{
printf("ERROR : file is NULL \n");
return ;
}
//1. 这一段是考虑没有指定输出文件名的情况，但是实际效果没有测试，可能有问题。
//形成输出文件名
if(outfilename == NULL)
{
size1 = strlen(file1)-4;
if(size1 > 29)
size1 = 29;
size2 = strlen(file2)-4;
if(size2 > 29)
size2 = 29;
strncpy(outnamebuf,file1,size1); //不需要后缀
strcat(outnamebuf,"_"); //加入下划线
strncat(outnamebuf,file2,size2);
strcat(outnamebuf,".bin");
}
else
{
size1 = strlen(outfilename);
if(size1 > 63) //文件名太长了
{
size2 = size1;
size1 = 59;
}
strncpy(outnamebuf,outfilename,size1);
if(size2 > 63)
{
strcat(outnamebuf,".bin");
}
}
printf("outnamebuf = %s\n",outnamebuf);
//2.得到app文件的md5值，存在全局变量中
get_file_md5sum(file2);
//3.打开iap的bin文件，全部读取处理
fin1 = fopen(file1, "rb");
if (fin1 != NULL)
{
/* 文件打开成功*/
printf("open %s success\r\n",file1);
}
else
{
printf("open %s error\r\n",file1);
return ;
}
//4.打开app的bin文件，全部读取处理
fin2 = fopen(file2, "rb");
if (fin2 != NULL)
{
/* 文件打开成功*/
printf("open %s success\r\n",file2);
}
else
{
fclose(fin1);
printf("open %s error\r\n",file2);
return ;
}
//5.得到app文件的大小
fseek(fin2, 0, SEEK_END);
size2 = ftell(fin2);
//6.得到iap文件的大小
fseek(fin1, 0, SEEK_END);
size1 = ftell(fin1);
fseek(fin1, 0, SEEK_SET);
printf("file2 size = %d\r\n", size2);
total_size = size2+0x6000; //7.需要分配的空间的大小
char* buf = malloc(total_size); //开一个空间
if(buf == NULL)
{
printf("error: total_size malloc %d\n",total_size);
fclose(fin1);
fclose(fin2);
return ;
}
//8.因为flash中没有数据的位置都是0xff,所以把缓存填充0xff
memset(buf,0xff,total_size); //先填充0xff
//9.读取appbin文件的内容，先判断前8个字节的内容，是否符合bin文件的特征。
fseek(fin2, 0, SEEK_SET);
ret = fread(buf, 1, 8, fin2); //从app文件中读取4个字节
if(ret == 8)
{
if (((*(uint32_t*)buf) & 0xfFFE0000 ) != 0x20000000)
{
printf("image addr 0 != 0x20000000\n");
printf("ERROR: bad image(app.bin)!!!!! combin cancle!!!,please check bin file!!!");
fclose(fin1);
fclose(fin2);
free(buf);
return ;
}
else if(((*(uint32_t*)(buf+4)) & 0xfFFf0000 ) != 0x08000000)
{
printf("image addr %#x != ApplicationAddress %#x\n",((*(uint32_t*)(buf+4)) & 0xfFFffc00 ),0x08000000);
printf("ERROR: bad image(app.bin)!!!!! combin cancle!!!,please check again!!!");
fclose(fin1);
fclose(fin2);
free(buf);
return ;
}
posision = ((*(uint16_t*)(buf+4)) & 0xfc00 ); //10.关键的一部，bin文件中可以知道app的偏移值，这里考虑的是不同单片机的偏移不同的问题
printf("posision = %#x\n",posision);
}
else
{
printf("error: fread(buf, 1, 2, fin2)\n");
fclose(fin1);
fclose(fin2);
free(buf);
return;
}
//11.正常偏移是24k左右，但是综合考虑，选择了2k，怕有的程序的偏移过小。
if(posision < 2048)
{
printf("ERROR: bad app image(bin)!!!!! ,please check app.bin!!!\n");
fclose(fin1);
fclose(fin2);
free(buf);
return;
}
//12. iap的大小超过了整个偏移区的地址
if(size1 > posision-1024)
{
printf("ERROR: bad iap image(bin)!!!!! ,please check iap.bin!!!\n");
fclose(fin1);
fclose(fin2);
free(buf);
}
//13.偏移不是24k的情况，调整一下大小
if(posision <= 0x6000) //
{
total_size = total_size - 0x6000 + posision; //重新调整一下大小
printf("total_size = %d\n",total_size);
}
else
{
printf("ERROR: bad app image(bin)!!!!! ,please check app.bin!!!\n");
fclose(fin1);
fclose(fin2);
free(buf);
return;
}
//14.文件2指针还原,指向文件开始的位置
fseek(fin2, 0, SEEK_SET);
//15.把iap的bin文件全部读出来
printf("size1 = %d\n",size1);
readcount = 0;
do
{
bw = fread(buf+readcount, 1, size1-readcount, fin1);
if(bw == 0)
break;
readcount += bw;
} while (readcount < size1);
//16.判断bin的合法性，
if (((*(uint32_t*)buf) & 0xfFFE0000 ) != 0x20000000)
{
printf("image addr 0 != 0x20000000\n");
printf("ERROR: bad image(iap.bin)!!!!! combin cancle!!!,please check bin file!!!\n");
fclose(fin1);
fclose(fin2);
free(buf);
return ;
}
else if(((*(uint32_t*)(buf+4)) & 0xfFFffc00 ) != 0x08000000)
{
printf("image addr %#x != ApplicationAddress %#x\n",((*(uint32_t*)(buf+4)) & 0xfFFffc00 ),0x08000000);
printf("ERROR: bad image(iap.bin)!!!!! combin cancle!!!,please check again!!!\n");
fclose(fin1);
fclose(fin2);
free(buf);
return ;
}
//17.把app的bin文件全部读出来
printf("size2 = %d\n",size2);
readcount = posision; //app的位置，在bin中已经指定
do
{
bw = fread(&buf[readcount], 1, size2, fin2);
if(bw == 0)
break;
readcount += bw;
} while (readcount-posision < size2);
//18,缓存的特定位置加入下载标记，升级标记，文件大小和md5值
posision -= 0x400; //退1k字节
printf("posion2 = %#x\n",posision);
(*(uint32_t*)(buf+4+posision)) = size2; //只保存app 的bin文件大小
(*(uint16_t*)(buf+posision)) = 0xff; //不需要升级
//19.这个地方比较特殊，设置对不同屏幕设置不同标记，方便单片机区分屏幕
if(strstr(file2,"old5") != NULL)
{
// lcd_inch = 4;
(*(uint8_t*)(buf+posision-1)) = 5;
printf("detect old5inch\n");
}
else if(strstr(file2,"7inch") != NULL)
{
// lcd_inch = 5;
(*(uint8_t*)(buf+posision-1)) = 4;
printf("detect 7inch\n");
}
else if(strstr(file2,"new5") != NULL)
{
// lcd_inch = 6;
(*(uint8_t*)(buf+posision-1)) = 6;
printf("detect new5inch\n");
}
//20,缓存的特定位置md5值，后面以为要区分多个单片机的bin，所以不同的单片机进行了一些小的偏移
//所以md5的位置也不会是固定的。同一个单片机肯定是固定在某个位置。
posision += 512; //写入md5的值。2023-06-12 hj的+8
if(strstr(file2,"hj22134") != NULL)
posision += 8; // hj的+8
printf("posion3 = %#x\n",posision);
for(i=0;i<32;i++)
{
buf[i+posision] = md5_readBuf[i];
}
fclose(fin1);
fclose(fin2);
//21.将缓存的内容生成第三个文件
fin1 = fopen(outnamebuf, "wb");
if (fin1 != NULL)
{
/* 文件打开成功*/
printf("3.open %s success \n",outnamebuf);
}
else
{
printf("3.open %s error \n",outnamebuf);
free(buf);
return ;
}
//22.写入文件
readcount = 0;
do
{
bw = fwrite(&buf[readcount], 1, total_size, fin1);
readcount += bw;
} while (readcount < total_size);
fclose(fin1);
free(buf);
printf("combin complete!! size = %d\n",total_size);
return;
}
五、总结
5.1 组合bin文件应该是一个比较简单的操作，但是说明一下，有助于理解升级过程。
5.2 该程序编译后，生成exe，由keil自动调用生成即可，比较方便。
点击编译之后，自动就生成好了。
5.3 全部代码如下：windows下使用mingw64编译即可
/*
* @Author: dazhi
* @Date: 2023-05-09 09:30:03
* @Last Modified by: dazhi
* @Last Modified time: 2023-07-19 14:17:56
*
* 如果使用md5sum的命令，则在windows下编译时，无法计算md值
* 下载mingw64：
* https://sourceforge.net/projects/mingw-w64/files/mingw-w64/mingw-w64-release/mingw-w64-v11.0.0.zip
* D:\Programfile\mingw64\bin\gcc combin.c -o combin
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <unistd.h>
#include <string.h>
#include <libgen.h>
//#include "md5.h"
char md5_readBuf[64] = {0};
#if 1
#define ROTATELEFT(value, bits) (((value) << (bits)) | ((value) >> (32 - (bits))))
/**
* @desc: convert message and mes_bkp string into integer array and store them in w
*/
static void md5_process_part1(uint32_t *w, unsigned char *message, uint32_t *pos, uint32_t mes_len, const unsigned char *mes_bkp)
{
uint32_t i; // used in for loop
for(i = 0; i <= 15; i++)
{
int32_t count = 0;
while(*pos < mes_len && count <= 24)
{
w[i] += (((uint32_t)message[*pos]) << count);
(*pos)++;
count += 8;
}
while(count <= 24)
{
w[i] += (((uint32_t)mes_bkp[*pos - mes_len]) << count);
(*pos)++;
count += 8;
}
}
}
/**
* @desc: start encryption based on w
*/
static void md5_process_part2(uint32_t abcd[4], uint32_t *w, const uint32_t k[64], const uint32_t s[64])
{
uint32_t i; // used in for loop
uint32_t a = abcd[0];
uint32_t b = abcd[1];
uint32_t c = abcd[2];
uint32_t d = abcd[3];
uint32_t f = 0;
uint32_t g = 0;
for(i = 0; i < 64; i++)
{
if(i <= 15) //i >= 0 &&
{
f = (b & c) | ((~b) & d);
g = i;
}else if(i >= 16 && i <= 31)
{
f = (d & b) | ((~d) & c);
g = (5 * i + 1) % 16;
}else if(i >= 32 && i <= 47)
{
f = b ^ c ^ d;
g = (3 * i + 5) % 16;
}else if(i >= 48 && i <= 63)
{
f = c ^ (b | (~d));
g = (7 * i) % 16;
}
uint32_t temp = d;
d = c;
c = b;
b = ROTATELEFT((a + f + k[i] + w[g]), s[i]) + b;
a = temp;
}
abcd[0] += a;
abcd[1] += b;
abcd[2] += c;
abcd[3] += d;
}
static const uint32_t k_table[]={
0xd76aa478,0xe8c7b756,0x242070db,0xc1bdceee,
0xf57c0faf,0x4787c62a,0xa8304613,0xfd469501,0x698098d8,
0x8b44f7af,0xffff5bb1,0x895cd7be,0x6b901122,0xfd987193,
0xa679438e,0x49b40821,0xf61e2562,0xc040b340,0x265e5a51,
0xe9b6c7aa,0xd62f105d,0x02441453,0xd8a1e681,0xe7d3fbc8,
0x21e1cde6,0xc33707d6,0xf4d50d87,0x455a14ed,0xa9e3e905,
0xfcefa3f8,0x676f02d9,0x8d2a4c8a,0xfffa3942,0x8771f681,
0x6d9d6122,0xfde5380c,0xa4beea44,0x4bdecfa9,0xf6bb4b60,
0xbebfbc70,0x289b7ec6,0xeaa127fa,0xd4ef3085,0x04881d05,
0xd9d4d039,0xe6db99e5,0x1fa27cf8,0xc4ac5665,0xf4292244,
0x432aff97,0xab9423a7,0xfc93a039,0x655b59c3,0x8f0ccc92,
0xffeff47d,0x85845dd1,0x6fa87e4f,0xfe2ce6e0,0xa3014314,
0x4e0811a1,0xf7537e82,0xbd3af235,0x2ad7d2bb,0xeb86d391
};
static const uint32_t s_table[]={
7,12,17,22,7,12,17,22,7,12,17,22,7,
12,17,22,5,9,14,20,5,9,14,20,5,9,14,20,5,9,14,20,
4,11,16,23,4,11,16,23,4,11,16,23,4,11,16,23,6,10,
15,21,6,10,15,21,6,10,15,21,6,10,15,21
};
int32_t cal_md5(unsigned char *result, unsigned char *data, int length){
if (result == NULL)
{
return 1;
}
uint32_t w[16];
uint32_t i; // used in for loop
uint32_t mes_len = length;
uint32_t looptimes = (mes_len + 8) / 64 + 1;
uint32_t abcd[] = {0x67452301, 0xEFCDAB89, 0x98BADCFE, 0x10325476};
uint32_t pos = 0; // position pointer for message
uint32_t bkp_len = 64 * looptimes - mes_len; // 经过计算发现不超过72
// unsigned char *bkp_mes = (unsigned char *)calloc(1, bkp_len);
unsigned char bkp_mes[80];
for(int i = 0; i < 80; i++) //初始化
{
bkp_mes[i] = 0;
}
bkp_mes[0] = (unsigned char)(0x80);
uint64_t mes_bit_len = ((uint64_t)mes_len) * 8;
for(i = 0; i < 8; i++)
{
bkp_mes[bkp_len-i-1] = (unsigned char)((mes_bit_len & (0x00000000000000FF << (8 * (7 - i)))) >> (8 * (7 - i)));
}
for(i = 0; i < looptimes; i++)
{
for(int j = 0; j < 16; j++) //初始化
{
w[j] = 0x00000000;
}
md5_process_part1(w, data, &pos, mes_len, bkp_mes); // compute w
md5_process_part2(abcd, w, k_table, s_table); // calculate md5 and store the result in abcd
}
for(int i = 0; i < 16; i++)
{
//result[i] = ((unsigned char*)abcd)[i];
sprintf((char*)result+i*2,"%02x",((unsigned char*)abcd)[i]); //2023-05-09 返回字符串
}
return 0;
}
#endif
int get_file_md5sum(const char * filename)
{
FILE * fin1;
// char cmd[128] = {"md5sum "};
int size1 ;
int ret;
int readcount,bw;
fin1 = fopen(filename, "rb");
if (fin1 != NULL)
{
/* 文件打开成功*/
printf("open %s success\r\n",filename);
}
else
{
printf("open %s error\r\n",filename);
return 1;
}
fseek(fin1, 0, SEEK_END);
size1 = ftell(fin1);
fseek(fin1, 0, SEEK_SET);
printf("file size = %d\r\n", size1);
char* buf = malloc(size1); //开一个空间
if(buf == NULL)
{
printf("error: size1 malloc %d\n",size1);
fclose(fin1);
return 1;
}
readcount = 0;
do
{
bw = fread(buf+readcount, 1, size1-readcount, fin1);
if(bw == 0)
break;
readcount += bw;
} while (readcount < size1);
ret = cal_md5(md5_readBuf, buf, size1);
//md5(buf, size1, md5_readBuf);
if(!ret)
printf("cal_md5 = %s\n",md5_readBuf);
free(buf);
fclose(fin1);
// strcat(cmd,filename);
// filep = popen(cmd,"r");
// if(!filep)
// return -1;
// ret = fread(md5_readBuf,32,1,filep);
// // printf("get_file_md5sum = %s\n",md5_readBuf);
// pclose(filep);
return ret;
}
void combin_file(char* file1,char* file2,char* outfilename)
{
FILE *fin1,*fin2;// *fout;
int size1 = 0,size2 = 0,total_size = 0;
char outnamebuf[64] = {0};
uint16_t posision = 0; //位置
int bw = 0;
int readcount = 0;
int ret,i;
int lcd_inch = 0;
if(file1== NULL || file2 == NULL)
{
printf("ERROR : file is NULL \n");
return ;
}
//1. 这一段是考虑没有指定输出文件名的情况，但是实际效果没有测试，可能有问题。
//形成输出文件名
if(outfilename == NULL)
{
size1 = strlen(file1)-4;
if(size1 > 29)
size1 = 29;
size2 = strlen(file2)-4;
if(size2 > 29)
size2 = 29;
strncpy(outnamebuf,file1,size1); //不需要后缀
strcat(outnamebuf,"_"); //加入下划线
strncat(outnamebuf,file2,size2);
strcat(outnamebuf,".bin");
}
else
{
size1 = strlen(outfilename);
if(size1 > 63) //文件名太长了
{
size2 = size1;
size1 = 59;
}
strncpy(outnamebuf,outfilename,size1);
if(size2 > 63)
{
strcat(outnamebuf,".bin");
}
}
printf("outnamebuf = %s\n",outnamebuf);
//2.得到app文件的md5值，存在全局变量中
get_file_md5sum(file2);
//3.打开iap的bin文件，全部读取处理
fin1 = fopen(file1, "rb");
if (fin1 != NULL)
{
/* 文件打开成功*/
printf("open %s success\r\n",file1);
}
else
{
printf("open %s error\r\n",file1);
return ;
}
//4.打开app的bin文件，全部读取处理
fin2 = fopen(file2, "rb");
if (fin2 != NULL)
{
/* 文件打开成功*/
printf("open %s success\r\n",file2);
}
else
{
fclose(fin1);
printf("open %s error\r\n",file2);
return ;
}
//5.得到app文件的大小
fseek(fin2, 0, SEEK_END);
size2 = ftell(fin2);
//6.得到iap文件的大小
fseek(fin1, 0, SEEK_END);
size1 = ftell(fin1);
fseek(fin1, 0, SEEK_SET);
printf("file2 size = %d\r\n", size2);
total_size = size2+0x6000; //7.需要分配的空间的大小
char* buf = malloc(total_size); //开一个空间
if(buf == NULL)
{
printf("error: total_size malloc %d\n",total_size);
fclose(fin1);
fclose(fin2);
return ;
}
//8.因为flash中没有数据的位置都是0xff,所以把缓存填充0xff
memset(buf,0xff,total_size); //先填充0xff
//9.读取appbin文件的内容，先判断前8个字节的内容，是否符合bin文件的特征。
fseek(fin2, 0, SEEK_SET);
ret = fread(buf, 1, 8, fin2); //从app文件中读取4个字节
if(ret == 8)
{
if (((*(uint32_t*)buf) & 0xfFFE0000 ) != 0x20000000)
{
printf("image addr 0 != 0x20000000\n");
printf("ERROR: bad image(app.bin)!!!!! combin cancle!!!,please check bin file!!!");
fclose(fin1);
fclose(fin2);
free(buf);
return ;
}
else if(((*(uint32_t*)(buf+4)) & 0xfFFf0000 ) != 0x08000000)
{
printf("image addr %#x != ApplicationAddress %#x\n",((*(uint32_t*)(buf+4)) & 0xfFFffc00 ),0x08000000);
printf("ERROR: bad image(app.bin)!!!!! combin cancle!!!,please check again!!!");
fclose(fin1);
fclose(fin2);
free(buf);
return ;
}
posision = ((*(uint16_t*)(buf+4)) & 0xfc00 ); //10.关键的一部，bin文件中可以知道app的偏移值，这里考虑的是不同单片机的偏移不同的问题
printf("posision = %#x\n",posision);
}
else
{
printf("error: fread(buf, 1, 2, fin2)\n");
fclose(fin1);
fclose(fin2);
free(buf);
return;
}
//11.正常偏移是24k左右，但是综合考虑，选择了2k，怕有的程序的偏移过小。
if(posision < 2048)
{
printf("ERROR: bad app image(bin)!!!!! ,please check app.bin!!!\n");
fclose(fin1);
fclose(fin2);
free(buf);
return;
}
//12. iap的大小超过了整个偏移区的地址
if(size1 > posision-1024)
{
printf("ERROR: bad iap image(bin)!!!!! ,please check iap.bin!!!\n");
fclose(fin1);
fclose(fin2);
free(buf);
}
//13.偏移不是24k的情况，调整一下大小
if(posision <= 0x6000) //
{
total_size = total_size - 0x6000 + posision; //重新调整一下大小
printf("total_size = %d\n",total_size);
}
else
{
printf("ERROR: bad app image(bin)!!!!! ,please check app.bin!!!\n");
fclose(fin1);
fclose(fin2);
free(buf);
return;
}
//14.文件2指针还原,指向文件开始的位置
fseek(fin2, 0, SEEK_SET);
//15.把iap的bin文件全部读出来
printf("size1 = %d\n",size1);
readcount = 0;
do
{
bw = fread(buf+readcount, 1, size1-readcount, fin1);
if(bw == 0)
break;
readcount += bw;
} while (readcount < size1);
//16.判断bin的合法性，
if (((*(uint32_t*)buf) & 0xfFFE0000 ) != 0x20000000)
{
printf("image addr 0 != 0x20000000\n");
printf("ERROR: bad image(iap.bin)!!!!! combin cancle!!!,please check bin file!!!\n");
fclose(fin1);
fclose(fin2);
free(buf);
return ;
}
else if(((*(uint32_t*)(buf+4)) & 0xfFFffc00 ) != 0x08000000)
{
printf("image addr %#x != ApplicationAddress %#x\n",((*(uint32_t*)(buf+4)) & 0xfFFffc00 ),0x08000000);
printf("ERROR: bad image(iap.bin)!!!!! combin cancle!!!,please check again!!!\n");
fclose(fin1);
fclose(fin2);
free(buf);
return ;
}
//17.把app的bin文件全部读出来
printf("size2 = %d\n",size2);
readcount = posision; //app的位置，在bin中已经指定
do
{
bw = fread(&buf[readcount], 1, size2, fin2);
if(bw == 0)
break;
readcount += bw;
} while (readcount-posision < size2);
//18,缓存的特定位置加入下载标记，升级标记，文件大小和md5值
posision -= 0x400; //退1k字节
printf("posion2 = %#x\n",posision);
(*(uint32_t*)(buf+4+posision)) = size2; //只保存app 的bin文件大小
(*(uint16_t*)(buf+posision)) = 0xff; //不需要升级
//19.这个地方比较特殊，设置对不同屏幕设置不同标记，方便单片机区分屏幕
if(strstr(file2,"old5") != NULL)
{
// lcd_inch = 4;
(*(uint8_t*)(buf+posision-1)) = 5;
printf("detect old5inch\n");
}
else if(strstr(file2,"7inch") != NULL)
{
// lcd_inch = 5;
(*(uint8_t*)(buf+posision-1)) = 4;
printf("detect 7inch\n");
}
else if(strstr(file2,"new5") != NULL)
{
// lcd_inch = 6;
(*(uint8_t*)(buf+posision-1)) = 6;
printf("detect new5inch\n");
}
//20,缓存的特定位置md5值，后面以为要区分多个单片机的bin，所以不同的单片机进行了一些小的偏移
//所以md5的位置也不会是固定的。同一个单片机肯定是固定在某个位置。
posision += 512; //写入md5的值。2023-06-12 hj的+8
if(strstr(file2,"hj22134") != NULL)
posision += 8; // hj的+8
printf("posion3 = %#x\n",posision);
for(i=0;i<32;i++)
{
buf[i+posision] = md5_readBuf[i];
}
fclose(fin1);
fclose(fin2);
//21.将缓存的内容生成第三个文件
fin1 = fopen(outnamebuf, "wb");
if (fin1 != NULL)
{
/* 文件打开成功*/
printf("3.open %s success \n",outnamebuf);
}
else
{
printf("3.open %s error \n",outnamebuf);
free(buf);
return ;
}
//22.写入文件
readcount = 0;
do
{
bw = fwrite(&buf[readcount], 1, total_size, fin1);
readcount += bw;
} while (readcount < total_size);
fclose(fin1);
free(buf);
printf("combin complete!! size = %d\n",total_size);
return;
}
int main(int argc,char* argv[])
{
char* outfilename = NULL;
if(argc < 3){
printf("Usage : %s <file1.bin> <file2.bin> [outfilename]\n",argv[0]);
return -1;
}
if(argc >= 4)
{
outfilename = argv[3];
}
//第一个文件，与第二个文件合并，生成第三个文件，第三个可以不指定。
combin_file(argv[1],argv[2],outfilename);
return 0;
}
