Telenetics 56 - Manual (Page 55)

AT Commands
Page 47
software or an equivalent process. If downloading existing firmware from the
modem, using an industry standard communications software or equivalent, put the
host PC in XMODEM receive mode.
The messages described in Table A-1 may occur during the uploading process:
Table A-1. Upload Messages
Message Description
Device not supported Displayed if the FLM used does not support the flash memory
that is installed on the board.
Wrong S37 format Displayed if the modem firmware being uploaded is not in
Motorola S3 format
Record error Displayed if there is an error while either uploading or
downloading. If this occurs, the transfer should be aborted,
and the user should restart at step 5
Download abort Displayed if the transfer is aborted before it is finished. If this
occurs, the user should restart at step 5.
Erase fail Displayed if the FLM is unable to erase the flash memory. If
this occurs, the user should restart at step 5.
Download error, Re-Load Displayed if there was an error when uploading or
downloading. If this occurs, the user should restart at step 5.
Error, No H/W flow ctl Displayed if RTS-CTS flow control is not set. If this occurs, the
user should restart at step 3.
DTE timeout Displayed if the DTE has stopped the XMODEM transfer
process before it is finished. If this occurs, the user should
restart at step 5
Code doesn’t match
hardware Displayed if the user is attempting to upload a firmware that
either not the same model (parallel, serial, etc.), crystal
frequency, or size (1Mbit, 2Mbit, etc.) as the firmware that is
currently on the board. If this occurs, the FLM will abort and
not allow the user to continue
Device successfully
programmed Displayed by the FLM at the completion of a successful
upload or download then the modem will do a cold start.
The uploader and downloader flash load modules (FLM) have several built in safety
mechanisms to reduce the risk of a failed flash upload/download. The FLM will not allow
a user to upload a firmware of different model (serial, parallel, etc.) or crystal speed than
what is currently in the flash memory. Also, it will not allow the user to upload a
firmware that is larger in size than the flash memory itself (e.g., a 2Mbit firmware onto a
1Mbit flash memory). It will, however, allow the user to upload a firmware that is
smaller in size than the flash memory, and it will program the firmware with the
appropriate offset in order for the firmware to function properly. In the instance that there
is a failure during the download or upload process, the modem will be in a “flash rescue
mode”. In this mode, the modem will respond “OK” to all AT commands, but will only
take action on the AT** command, so a new attempt to upload or download can be
initiated. When the modem is in the “flash rescue mode” it will only be able to respond
to AT commands if the DTE rate has not been changed since the last AT** command
was successfully issued, even if the modem is powered off and on.