betty/fwdump.c

   1 /*
   2  * fwdump.c - dump the firmware received by uart to your computers harddisk
   3  *            use fwbc as a transmitting firmware
   4  *
   5  * author: hackbard@hackdaworld.org
   6  *
   7  */
   8
   9 #include <stdio.h>
  10 #include <stdlib.h>
  11 #include <string.h>
  12 #include <unistd.h>
  13 #include <sys/types.h>
  14 #include <sys/stat.h>
  15 #include <fcntl.h>
  16 #include <termios.h>
  17
  18 #define BUFSIZE         16
  19
  20 int open_serial_port(char *sdev) {
  21
  22         struct termios term;
  23         int fd;
  24
  25         /* open serial device */
  26
  27         fd=open(sdev,O_RDWR);
  28         if(fd<0) {
  29                 perror("tts open");
  30                 return fd;
  31         }
  32
  33         /* configure the serial device */
  34
  35         tcgetattr(fd,&term);
  36
  37         // input/output baudrate
  38
  39         cfsetispeed(&term,B9600);
  40         cfsetospeed(&term,B9600);
  41
  42         // control options -> 8n1
  43
  44         term.c_cflag&=~PARENB;  // no parity
  45         term.c_cflag&=~CSTOPB;  // only 1 stop bit
  46         term.c_cflag&=~CSIZE;   // no bit mask for data bits
  47         term.c_cflag|=CS8;      // 8 data bits
  48
  49         // line options -> raw input
  50
  51         term.c_lflag&=~(ICANON|ECHO|ECHOE|ISIG);
  52
  53         // input options -> enable flow control
  54
  55         term.c_iflag&=~(IXON|IXOFF|IXANY|INLCR|ICRNL);
  56
  57         // output options
  58
  59         term.c_oflag=0;
  60
  61         // more control options -> timeout / flow control
  62
  63         term.c_cc[VMIN]=0;
  64         term.c_cc[VTIME]=40;    // 4 second timeout
  65         term.c_cc[VSTART]=0x11;
  66         term.c_cc[VSTOP]=0x13;
  67
  68         tcsetattr(fd,TCSANOW,&term);
  69
  70         return fd;
  71 }
  72
  73 int open_dump_file(char *file) {
  74
  75         int fd;
  76
  77         /* open dump file */
  78
  79         fd=open(file,O_WRONLY|O_CREAT);
  80
  81         if(fd<0)
  82                 perror("fw open");
  83
  84         return fd;
  85 }
  86
  87 int main(int argc,char **argv) {
  88
  89         int sfd,dfd;
  90         unsigned char buf[BUFSIZE];
  91         int cnt,size,ret;
  92
  93         if(argc!=3) {
  94                 printf("usage: %s <serial port> <dump file>\n",argv[0]);
  95                 return -1;
  96         }
  97
  98         sfd=open_serial_port(argv[1]);
  99
 100         dfd=open_dump_file(argv[2]);
 101
 102         if((sfd<0)|(dfd<0))
 103                 return -1;
 104
 105         /* send start byte */
 106         buf[0]=0x23;
 107         ret=write(sfd,buf,1);
 108         if(ret!=1) {
 109                 perror("write start byte");
 110                 return ret;
 111         }
 112
 113         /* receive flash content */
 114         while(ret) {
 115                 ret=read(sfd,buf,BUFSIZE);
 116                 size=ret;
 117                 cnt=0;
 118                 while(size) {
 119                         ret=write(dfd,buf+cnt,size-cnt);
 120                         if(ret<0) {
 121                                 perror("write to dump file");
 122                                 return ret;
 123                         }
 124                         size-=ret;
 125                         cnt+=ret;
 126                 }
 127         }
 128
 129         return 0;
 130 }