fx2/ee2ihex.c

   1 /*
   2  * ee2ihex, convert eeprom content to intel hex
   3  *
   4  * author: hackbard@hackdaworld.org
   5  *
   6  * build: gcc -Wall -O3 -o ee2ihex ee2ihex.c
   7  * usage: ./ee2ihex foo.iic > foo.ihx
   8  *
   9  */
  10
  11
  12 #include <stdio.h>
  13 #include <stdlib.h>
  14 #include <unistd.h>
  15 #include <sys/types.h>
  16 #include <sys/stat.h>
  17 #include <fcntl.h>
  18
  19 int hexdump(unsigned char *buf,int len) {
  20
  21         int i;
  22
  23         for(i=0;i<len;i++)
  24                 printf("%02x ",buf[i]);
  25
  26         return 0;
  27 }
  28
  29 int asciidump(unsigned char *buf,int len) {
  30
  31         int i;
  32
  33         for(i=0;i<len;i++)
  34                 printf("%c ",(buf[i]<0x20)||(buf[i]>0x7e)?'.':buf[i]);
  35
  36         return 0;
  37 }
  38
  39 int main(int argc,char **argv) {
  40
  41         int i;
  42         int fd;
  43         int ret;
  44         int size=0;
  45         unsigned short len;
  46         unsigned short ihxaddr;
  47         unsigned char addrl;
  48         unsigned char addrh;
  49         unsigned char ihxlen;
  50         unsigned char crc;
  51         unsigned char buf[1024];
  52
  53         fd=open(argv[1],O_RDONLY);
  54         if(fd<0) {
  55                 perror("fd open");
  56                 return fd;
  57         }
  58
  59         /* verify eeprom image */
  60         ret=read(fd,buf,8);
  61         if(ret!=8) {
  62                 printf("header too small\n");
  63                 return -1;
  64         }
  65
  66         if(buf[0]!=0xc2) {
  67                 printf("wrong boot byte: %02x\n",buf[0]);
  68                 return -1;
  69         }
  70
  71         printf("# ihex file, source eeprom file: %s\n",argv[1]);
  72         printf("#\n");
  73         printf("# header:\n");
  74         printf("# ");
  75         hexdump(buf,8);
  76         printf(" | ");
  77         asciidump(buf,8);
  78         printf("\n");
  79         printf("#\n");
  80
  81         size=0;
  82
  83         while(ret) {
  84                 ret=read(fd,buf,4);
  85                 if(ret!=4) {
  86                         perror("read len/addr");
  87                         return ret;
  88                 }
  89
  90                 len=(buf[0]<<8)|(buf[1]);
  91                 crc=0x00;
  92                 ihxaddr=(buf[2]<<8)|buf[3];
  93
  94                 if(buf[0]&(1<<7))
  95                         goto END;
  96
  97                 while(len) {
  98
  99                         ihxlen=(len>=0x10)?0x10:len;
 100                         addrh=ihxaddr>>8;
 101                         addrl=ihxaddr&0xff;
 102                         printf(":%02x%02x%02x%02x",ihxlen,addrh,addrl,0);
 103                         crc=ihxlen+addrh+addrl;
 104
 105                         ret=read(fd,buf,ihxlen);
 106                         if(ret!=ihxlen) {
 107                                 perror("read data");
 108                                 return ret;
 109                         }
 110
 111                         for(i=0;i<ihxlen;i++) {
 112                                 printf("%02x",buf[i]);
 113                                 crc+=buf[i];
 114                         }
 115
 116                         crc^=0xff;
 117                         crc+=1;
 118                         printf("%02x\n",crc);
 119
 120                         ihxaddr+=ihxlen;
 121                         len-=ihxlen;
 122                 }
 123
 124         }
 125
 126 END:
 127         printf(":00000001ff\n");
 128         close(fd);
 129
 130         return 0;
 131 }