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Add options to compute Xilinx compatible (PRM) checksums #28

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Add options to compute Xilinx compatible (PRM) checksums #28

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40 changes: 35 additions & 5 deletions bitparse.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -33,11 +33,15 @@ Dmitry Teytelman [[email protected]] 14 Jun 2006 [applied 13 Aug 2006]:

void usage() {
fprintf(stderr,
"\nUsage:bitparse [-i input format] [-o output format ][-O outfile] infile\n" " -h\t\tprint this help\n"
"\nUsage:bitparse [-i input format] [-o output format ][-O outfile] [-p padlen] [-P padvalue] infile\n"
" -h\t\tprint this help\n"
" -v\t\tverbose output\n"
" -O\t\toutput file (parse input file only if not given\n"
" -i\t\tinput file format (BIT|BIN|BPI|HEX|MCS|IHEX)\n"
" -o\t\toutput file format (BIT|BIN|BPI|HEX|MCS|IHEX)\n");
" -o\t\toutput file format (BIT|BIN|BPI|HEX|MCS|IHEX)\n"
" -p\t\tROM size to compute Xilinx MCS checksum\n"
" -P\t\tPad value when computing Xilinx MCS checksum (default 0xff)\n"
);
exit(255);
}

Expand All @@ -47,12 +51,12 @@ int main(int argc, char**args)
FILE_STYLE in_style = STYLE_BIT;
FILE_STYLE out_style = STYLE_BIT;
uint64_t sum = 0L;
unsigned int i;
unsigned int i, padlen = 0, padvalue = 0xff;

const char * outfile = NULL;
while(true)
{
switch(getopt(argc, args, "?i:vo:O:"))
switch(getopt(argc, args, "?i:vo:O:p:P:"))
{
case -1: goto args_done;
case 'i':
Expand All @@ -74,6 +78,20 @@ int main(int argc, char**args)
case 'O':
outfile = optarg;
break;

case 'p':
padlen = strtol(optarg, NULL, 0);
break;

case 'P':
padvalue = strtol(optarg, NULL, 0);
if (padvalue < 0 || padvalue > 255)
{
fprintf(stderr, "Pad value must be 0-255");
usage();
}
break;

case '?':
case 'h':
default:
Expand Down Expand Up @@ -116,7 +134,19 @@ int main(int argc, char**args)
sum += (file.getData()[i]) ^0xff;
}
fprintf(stderr, "64-bit sum: %" PRIu64 "\n", sum);


/* Calculate MCS compatible checksum if given the ROM size */
if (padlen != 0) {
byte *d = file.getData();
sum = 0;
for (i = 0; i < file.getLengthBytes(); i++)
sum += d[i];
if (padlen > file.getLengthBytes())
for (i = 0; i < padlen - file.getLengthBytes(); i++)
sum += padvalue;
fprintf(stderr, "Xilinx sum: %08" PRIx64 "\n", sum);
}

if(outfile) {
if(outfile[0] == '-')
fp = stdout;
Expand Down