Olympus Sonic 1200S/HR, Руководство пользователя

Страница: 150 / 154

142 Chapter 7
1. Text Read/Upload Commands
The instrument responds to text read commands with an ASCII string terminated with a
carriage return (0D Hex). To ensure proper transfer, the following steps are used to upload a
text string:
a) Host sends a “Read Text” command.
b) Host waits for the Sonic
®
1200S/HR to respond with an ASCII text string (terminated
with a carriage. return, 0D Hex) or an error prompt.
2. Text Write/Download Commands
The Sonic
®
1200S/HR utilizes only a subset of the printable ASCII characters (A-Z, 0-9, ., -, /,
#, %, and SPACE) . All other characters should be avoided. To ensure proper transfer, these
steps are used to write a text string:
a) Host sends the appropriate “Write Text” command.
b) Host waits for the Sonic
®
1200S/HR to respond with a carriage return (0D Hex) or an
error prompt.
c) If no error was encountered, the host sends the text string and waits for a prompt.
3. Binary Read/Upload Commands
The binary upload transfer consists of a 2-byte size count (SS), followed by the binary data
information (B..B), and a 1-byte checksum (C). The size count is sent in low byte then high
byte order. To ensure data integrity, the host should calculate its own checksum and compare it
to that sent by the Sonic
®
1200S/HR. The checksum is generated by summing all byte values,
excluding the size count and checksum, modulus 256.
(Byte1 + Byte2 + ... + ByteN) % 256
To ensure proper transfer, the following steps are used to upload a scan:
a) Host sends a “Binary Upload” command.
b) Host waits for the Sonic
®
1200S/HR to respond with a carriage return (0D Hex) or an
error prompt.
c) If no error was encountered, the Sonic
®
1200S/HR proceeds immediately with the
upload.
4. Binary Write/Download Commands
The binary download transfer consists of a 2-byte size count (SS), followed by the binary data
information (B..B), and a 1-byte checksum (C).