Data I/O UniSite-xpi, User Manual

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6. Translation Formats
6-8 UniSite-xpi User Manual
The record ends with a checksum field initiated by the tag character 7 or
8, a 4-character checksum, and the tag character F. The checksum is the
two’s complement of the sum of the 8-bit ASCII values of the characters,
beginning with the first tag character and ending with the checksum tag
character (7 or 8).
Data records follow the same format as the start-of-file record but do not
contain a file header. The end-of-file record consists of a colon (:) only.
The output translator sends a CTRL-S after the colon.
During download or input from disk operations the destination address
for the data is calculated in the following manner:
Memory address =
(load address x 2) – I/O address begin address
During upload or output to disk operations the load address sent with
each data record is calculated in the following manner:
Load address = I/O address offset / 2
The Memory begin address, I/O address offset, and User data size
parameters represent bytes and must be even values for this format. The
upload record size must also be even for this format (default is 16).
Note: If the data will be programmed into a 16-bit device to be used in a
TMS320 processor-based system, the odd/even byte swap switch must be
enabled.