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Chapter 5 – AT Commands, S-Registers, and Result Codes
Multi-Tech Systems, Inc. SocketModem MT5600SMI Developer’s Guide 34
Command %8 Plug and Play Vendor ID and Product Number
Description: Sets and stores Vendor ID and product number for serial Plug and Play
and for ISA Plug and Play which use the Conexant 11596 Plug and Play
device. Applicable to Desktop configuration only.
Default: None
Example: %8<3 ASCII characters><4 hex numbers><same 3 ASCII
characters><same 4 hex numbers><cr>
Result Codes: OK <3 ASCII characters><4 hex numbers><same 3 ASCII
characters><same 4 hex numbers>
Otherwise ERROR
Command ** Load Flash Memory
Description: The linear flash memory uploader allows flash memory connected to the
modem external memory bus to be upgraded with revised modem
firmware. This process transfers (uploads) the upgraded modem firmware
(data) from the host computer to the modem which transfers the data to the
flash memory device. The linear flash memory downloader allows the flash
memory connected to the modem external memory bus to read and saved.
This process transfers (downloads) the current modem firmware (data) to
the host computer. Uploading new firmware to the flash memory or
downloading existing firmware from the flash memory device is a two-step
process.
1. When the AT** command is issued, the modem firmware boot loader is
invoked and the user will first load a flash load module (FLM) into the
modem's RAM. If the user wishes to upload new firmware to the
modem, he should load the uploader FLM. If the user wishes to
download existing firmware from the modem, he should load the
downloader FLM. In either case, the data transfer is done via an ASCII
transfer. The FLM contains the programming algorithm for the flash
memory device being programmed and any messages that may be sent
during the load process.
2. If the user wishes to upload new firmware to the modem, then he will
then load the new modem firmware, which the uploader FLM will then
program into the flash memory device. This transfer is done via
XMODEM transfer. If the user wishes to download existing firmware
from the modem, then he will set up the host PC for XMODEM receive
and the downloader FLM will begin to send the existing firmware from
the flash memory to the host PC.
Procedure
1. Install in the modem a flash memory programmed with the modem
firmware or a blank flash memory.
2. Put the uploader FLM and downloader FLM files and the new modem
firmware file (e.g., XmUL003.s37, XmDL003.s37, and 206s4712.S37)
in an appropriate directory on the computer's hard disk.
3. Configure the communications application program for a DTE rate of
between 9600 bps and 115200 bps and RTS/CTS flow control.
4. Check the modem for response by typing AT.
5. Initiate the download process using the AT** command. The
"Download flash code…" message appears upon issuing the AT**
command.
6. Perform an ASCII transfer of the FLM file (e.g., XmUL003.s37 for
uploading new firmware to the modem or XmDL003.s37 for
downloading existing firmware from the modem) from the host
computer to the modem RAM using an industry standard
communications software or an equivalent process (ensure that all
ASCII translation or pacing is turned off).