3980xpi Users Manual - Data I/O Corporation

Translation Formats
The Data Bus Width and Data Width Base are not used by the 2900/3900
during download. During upload, the Data Bus Width will be set to the current
Data Word Width, and the Data Width Base will be set to 8. The Transfer
Address is not used by the 2900/3900.
Data records follow the Start-of-file record. Each begins with 2 byte counts:
the first expresses the number of 16-bit bytes in the record not including the
checksum and itself; the second expresses the number of 8-bit data bytes in
the record. Next comes a 32-bit address, which specifies the storage location
of the following data byte. Data bytes follow; after the last data byte is a
checksum of every byte in the record except the first byte, which is the word
count.
The End-of-file record consists of a one byte word count, which is always zero.
Leader and trailer nulls, normally 50 each, are suppressed in this translation
format.
Format 89 does not function properly unless you select NO parity and 8-bit
data.
Texas Instruments SDSMAC Format, Code 90
Data files in the SDSMAC format consist of a start-of-file record, data records,
and an end-of-file record. See Figure 5-17.
Figure 5-17. TI SDSMAC Format (example)
Byte Count
Tag Character
End-of-File Record
Filename
Tag Character
Checksum
Tag Character
00050 7FDD4F
90000BFFFFBFFFFBFFFFBFFFFBFFFFBFFFFBFFFFBFFFF7F400F
90010BFFFFBFFFFBFFFFBFFFFBFFFFBFFFFBFFFFBFFFF7F3FFF
90020BFFFFBFFFFBFFFFBFFFFBFFFFBFFFFBFFFFBFFFF7F3FEF
90030BFFFFBFFFFBFFFFBFFFFBFFFFBFFFFBFFFFBFFFF7F3FDF
90040BFFFFBFFFFBFFFFBFFFFBFFFFBFFFFBFFFFBFFFF7F3FCF
:
Load Address
LEGEND
Tag Characters
Checksum
Data
Records
Nonprinting Carriage Return, with optional
line feed and nulls determined by null count. 0089-4
Each record is composed of a series of small fields, each initiated by a tag
character. The programmer recognizes and acknowledges the following tag
characters:
0 or K — followed by a file header.
7 — followed by a checksum which the programmer acknowledges.
8 — followed by a checksum which the programmer ignores.
9 — followed by a load address.
B — followed by 4 data characters.
F — denotes the end of a data record.
* — followed by 2 data characters.
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