UM0144 datasheet(44/92 Pages) STMICROELECTRONICS

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5 OBSEND

ST7 Assembler Linker

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UM0144

including the byte count field until the checksum itself. In this context, 'real value' means the

value of the byte before it is expanded into two ASCII characters.

The record is concluded by a CR-LF combination $0A, $0D. The S0, S8 and S9 (i.e., header

and EOF) records are always the same:

S00600004844521B

and:

S804000000FB

S9030000FC

a complete example of S-record transmission may look like:

S00600004844521B

S113001AFF120094FF130094D08AFF390094FF1250

S20801C004FFC0000073

<format>= x

The extended S-record format, selected by format x, sends code as described above, except

that after the S9, it sends a list of SX records, one after the other, in the format:

0000 LABEL

where 0000 are four ASCII zeroes, and LABEL is five ASCII characters. There are two spaces

after the SX and one space after the 0000. 0000 represents the hexadecimal value of the label.

LABEL may extend to 31 characters, and end with a carriage return.

5.2.7

ST 2 and ST 4 S-record formats

<format>= 2

<format>= 4

These are industrial formats defined for specific needs.

This format allows to specify 2-byte words for one address.

This format allows to specify 4-byte words for one address.

5.2.8

GP binary

<format>= g

This format is simple. It has a 16-byte count at the beginning low-byte first, calculated by

starting at 0, and adding the value of each byte until the end of the data is reached. If there are

any 'gaps' in your code, obsend will fill them in with $FF, and adjust the checksum accordingly.

After that four bytes of header information, the data follows in one big block.

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