Workaround for Macraigor OCD Commander download problem

[Graham Stoney]

In case anyone else is thinking of using a Macraigor BDM/OCD device to download
code to their target hardware, the following advice might save you a couple of
hours of hair-pulling. Using the 1999 version of OCD Commander with a Raven,
I found that the s-records read from my input file were being silently
truncated after 20 bytes. Since GNU objcopy generates 21 bytes s-records, my
download was being corrupted.

Macraigor tell me that they're working on the problem, in response to my
report. Meanwhile, here's a patch to binutils to work around the problem:

*** bfd/srec.c.dist     Thu Dec  2 18:10:20 1999
--- bfd/srec.c  Thu Dec  2 18:10:30 1999
***************
*** 171,177 ****
  /* The maximum number of bytes on a line is FF */
  #define MAXCHUNK 0xff
  /* The number of bytes we fit onto a line on output */
! #define CHUNK 21
  
  /* When writing an S-record file, the S-records can not be output as
     they are seen.  This structure is used to hold them in memory.  */
--- 171,177 ----
  /* The maximum number of bytes on a line is FF */
  #define MAXCHUNK 0xff
  /* The number of bytes we fit onto a line on output */
! #define CHUNK 20
  
  /* When writing an S-record file, the S-records can not be output as
     they are seen.  This structure is used to hold them in memory.  */

Regards,
Graham


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