Comtrol eCos - Manual (Page 139)

mcmp
Name
mcmp — Compare two segments of memory
Synopsis
mcmp {-s location1 } {-d location1 } {-l length } [-1 | -2 | -4]
Arguments
Name Type Description Default
-s location1 Memory address Location for start of data. none
-d location2 Memory address Location for start of data. none
-l length Number Length of data none
-1 Access one byte (8 bits) at
a time. Only the least
significant 8 bits of the
pattern will be used. -4
-2 Access two bytes (16 bits)
at a time. Only the least
significant 16 bits of the
pattern will be used. -4
-4 Access one word (32 bits)
at a time. -4
Description
Compares the contents of two ranges of memory (RAM, ROM, FLASH, etc).
Examples
Compare two buffers which match (result is quiet).
RedBoot> mfill -b 0x100000 -l 0x20 -p 0xDEADFACE
RedBoot> mfill -b 0x200000 -l 0x20 -p 0xDEADFACE
RedBoot> mcmp -s 0x100000 -d 0x200000 -l 0x20
Compare two buffers which don’t match. Only the first non-matching element is displayed.
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