Freescale Semiconductor ColdFire MCF5274, User Manual

Page: 50 / 104

3-12 M5275EVB User’s Manual
Commands
BS Block Search
Usage:BS<width> begin end data
The BS command searches a contiguous block of memory starting at address begin,
stopping at address end, for the value data. <Width> modifies the size of the data that is
compared during the search. If no <width> is specified, the default of word sized data is
used.
The values for addresses begin and end may be absolute addresses specified as hexadecimal
values, or symbol names. The value for data may be a symbol name or a number converted
according to the user-defined radix, normally hexadecimal.
This command first aligns the starting address for the data access size, and then increments
the address accordingly during the operation. Thus, for the duration of the operation, this
command performs properly-aligned memory accesses.
Examples:
To search for the 16-bit value 0x1234 in the memory block starting at 0x00040000 and
ending at 0x00080000:
bs 40000 80000 1234
This reads the 16-bit word located at 0x00040000 and compares it against the 16-bit value
0x1234. If no match is found, then the address is incremented to 0x00040002 and the next
16-bit value is read and compared.
To search for the 32-bit value 0xABCD in the memory block starting at 0x00040000 and
ending at 0x00080000:
bs.l 40000 80000 ABCD
This reads the 32-bit word located at 0x00040000 and compares it against the 32-bit value
0x0000ABCD. If no match is found, then the address is incremented to 0x00040004 and
the next 32-bit value is read and compared.