Texas Instruments TMS320C54x, User Manual

Page: 397 / 469

Example 1: Building a Command File for Two 8-Bit EPROMS
C-5 Hex Conversion Utility Examples
With the memory width and ROM width values above, the utility will automati-
cally generate two output files. The ratio of memory width to ROM width deter-
mines the number of output files. The ROM0 file contains the lower 8 of the 16
bits of raw data, and the ROM1 file contains the upper 8 bits of the correspond-
ing data.
Example C–3 shows the hex command file with all of the selected options.
Example C–3. A Hex Command File for Two 8-Bit EPROMs
test.out /* COFF object input file */
–map example1.mxp
/*––––––––––––––––––––––––––––––––––––––––––––––––––––––*/
/* Set parameters for EPROM programmer */
/*––––––––––––––––––––––––––––––––––––––––––––––––––––––*/
–i /* Select Intel format */
–byte /* Select byte increment for addresses */
/*––––––––––––––––––––––––––––––––––––––––––––––––––––––*/
/* Set options required to describe EPROM memory system */
/*––––––––––––––––––––––––––––––––––––––––––––––––––––––*/
–memwidth 16 /* Set EPROM system memory width */
–romwidth 8 /* Set physical width of ROM device */
ROMS
{
PAGE 0 : EPROM : origin = 0x00, length = 0x10000,
files = {low8.bit, upp8.bit}
}
SECTIONS
{ outsec: paddr = 0x10 }
Figure C–2 (a) shows the contents of the converted file for ROM0 (low8.bit)
containing the lower 8 bits. Figure C–2 (b) shows the contents of the converted
file for ROM1 (upp8.bit) containing the upper 8 bits of data.