Telenetics 56 - Manual (Page 54)

AT Commands
Page 46
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.
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).
7.
After the FLM has been loaded, if uploading new firmware to the modem, perform an
XMODEM upload of the new modem firmware hex file (e.g., 206s4712.S37) from
the host computer to the modem RAM using an industry standard communications