Help understanding HSERIN/HSEROUT

[richard]

My project is about a 3G monitoring system and receiving SMS messages is crucial (= it is crucial not to miss any incoming SMS).

the problem as i see it is that you are mixing up receiving a SMS message notification with receiving serial data without losing characters.


the question really is
how can i receive serial data as a background process with out data loss ?
how can i signal foreground process that a message has been received and not lose messages?


a workable solution is a interrupt driven ringbuffer for serial reception
that signals the foreground with a flag on completion of notification message.


the ringbuffer must be large enough to allow processing without data loss
the chip must have adequate speed and resources [not a 690, more like 16f1829]
hserin is not in the solution , its not flexible enough to be useful for this sort of task


you will find ringbuffer examples on both forums

[Ioannis]

Richard,

I think what you propose is the best solution and ultimately, Roger may follow it.

But it may be too complicated at the moment to have such an advanced data handling. Or not?

Ioannis

[richard]

its like trying to remove the head off a motor with a shifting spanner.
anyone who is serious about these things has a socket wrench in their toolkit

with proper tools things are easy, if your serious you make the investment.
not only that when you have some isr driven serial tools in your kit all sorts of
tasks become possible opening up a whole new vista

[Ioannis]

Totally agree, but Roger is still using On Interrupts...!

Ioannis

[flotulopex]

Hi,

I don't need to stick to interrupts; I just thought this would be a good idea....

The thing is, I don't know the right (or best) "tool" to use and I appreciate your help and comments to take the correct path for my project

"Ring buffer" is new to me so I'll first have to spend some hours of reading and searching to get more info. My monitor prototype is already in the field and every immediate improvement, the one I may have the skills to make immediately, is the always the best.

So, because of my lack of knowledge (but it is getting better every day), these are the tools I will rely on for now:

I think there is no point in hunting down the incoming SMS as they are available in the GSM module.

Having a routine checking the received message list every 5 seconds or so will allow me to start to improve the reliability of my monitor asap.

Richard is right: I'm mixing up things and tracking incoming serial data is actually not that crucial. For any reason, I was focusing on the wrong target....