Fluke 2635A user manual Figure C-1. Ascii String Decoding

Appendices

Binary Upload of Logged Data C

0, 0x3f, 2, 1, 0x0f, 4, 2, 0x03, 6,

};

1, 0x30, 4, 2, 0x3c, 2, 3, 0x3f, 0,

/* dst[0] from src[0] and src[1] */ /* dst[1] from src[1] and src[2] */ /* dst[2] from src[2] and src[3] */

auto unsigned char n; auto struct nibtab_s *t; auto unsigned char tmpsrc[4]; auto int dst_bytes;

/* Number of bytes created */ dst_bytes = 0;

/* Process src in chunks of four */ while (*src) {

/* Copy source, filing "holes" at end with zeros */ for (n = 0; n < 4; n++) {

if (*src)

tmpsrc[n] = *src++ - ’0’; else

tmpsrc[n] = 0;

}

/* Mung source into destination */

for (t = nibtab; t < &nibtab[3]; t++) {

*dst = (tmpsrc[t->lindex] & t->lmask) << t->lshift; *dst = (tmpsrc[t->rindex] & t->rmask) >> t->rshift;

dst++;

dst_bytes++;

}

}

return (dst_bytes);

}

Figure C-1. ASCII String Decoding

The raw data output array contains the information listed below. Note that the number of floating point values is equal to the number of channels in use, plus one. (The totalizer count is always present in the data, and is stored as a floating point number.)

∙Time stamp (BCD format) byte0: hours

byte1: minutes

byte2: seconds

byte3: month

byte4: date

byte5: year

∙Temperature units, measurement rate, and I/O

C-3