hi! i am working on a college project where i need to send sms through pc having VB+ GUI. will be using nxp 2144 or 2146 arm microcontroller and wavecom 2686 gsm module...to start with how do i interface the microcontroller to pc....i mean i might have to consider of a hardware design for the board...pls help me how do i go abt it....sending sms is not the sole purpose, voice interface will be added once sending sms part is accomplished
"the company has told me is that it needs me to design a system where a msg will be sent through a computer to a gsm module via the microcontroller"
That makes absolutely no sense whatsoever!
The PC is perfectly capable of controlling a GSM module directly without any need of any microcontroller; in fact, the PC is far more capable than the microcontroller!
In fact, if you have a PC, it would probably be far more sensible to use a direct network link to do the SMS and not bother with the GSM module either! Google for terms like "Bulk SMS" and "SMS gateway"...
eg, " href= "http://www.intellisoftware.co.uk/sms-gateway/">www.intellisoftware.co.uk/.../ www.dialogue.co.uk/services.php www.tiltd.com/.../txtranet.html - you can get a FREE account with 10 credits on it to test!
"if i have to use that method how should i implement it.."
Exactly as the documentation tells you!
Check the NXP site for other supporting documentation; Note that NXP tend to provide both a "datasheet" and a "user manual" for their chips; you need to study both.
If the decisions to send an SMS is made by a PC, I would either use a USB-connected GSM modem (good for a vehicle-mounted PC) or subscribe to an Internet-based SMS service.
Microcontrollers are fun, but have to add some value to the solution. If they don't, then there is no need for them.
-> they have given a diagram that is to be used to interface the microcontroller through the USB. <-
www.standardics.nxp.com/.../lpc2141.lpc2142.lpc2144.lpc2146.lpc2148.pdf
Page 34. 10. Application information 10.1 Suggested USB interface solutions Fig 10. LPC2141/42/44/46/48 USB interface using the CONNECT function on pin 17 Fig 11. LPC2141/42/44/46/48 USB interface using the UP_LED function on pin 17
I think that, it is for circuit design, right?
What do you mean by "how should i implement it."?