HOW TO INTERFACE WAVECOM MODEM WITH ARM7TDMIS??
The Wavecom modem (or any other modem, for that matter) neither knows nor cares what is connected to it - the interface works as defined in the modem Manual irrespective of whether you connect it to a PC, an ARM, an 8051, a dumb terminal, or anything else!
So see these threads: http://www.keil.com/forum/docs/thread8582.asp http://www.keil.com/forum/docs/thread8510.asp
You will also need the Wavecom AT Commands Manual - from Wavecom.
Similarly, as far as serial IO is concerned, the ARM neither knows nor cares what is connected to its UART - so the serial comms part of this no different from any other serial comms project...
You do realise that Wavecom has a specific feature that allows you to run your embedded application within the modem - thus obviating the need for an external microcontroller:
">www.wavecom.com/.../index.php fuseAction=page&rubric=WMOpenATSoftSuite&article=WMOpenATSoftSuite
Wavecom modems may be programmed themselves for required functionality . Yet if needed an external interface then they can be controlled through serial port i.e. interface your micros (ARM) serial port to the serial port of WAVECOM modem and control it through AT commands. The commands can be found in wavecoms document.
Suvidh
(Some) Wavecom modems have some general-purpose IO (GPIO) pins in addition to the serial port - so that's also an option for communicating with another processor (I2C is supported).
The Wavecom modem cotnains a powerful ARM CPU, so any processing can be done within the modem; the external microcontroller would just need to be a simple IO controller - probably no need for another ARM there!