bring rs232 out of the main loop

[Blob]

Hello,

I have a rotating disk with some teeth (18) on it.
Depending on the position of the wheel I will have to do some actions.

I am polling on the EXTint flag bit to "see" the teeth on the disk.
The loop will increase from 0 till 17 correspoding to each tooth.

In one position I will have to send some data via RS232.
A number between 0-310 and two numbers between 0 - 256.

At low rpm this works perfectly.
But at high rpm the time between 2 interrupts is to short to send the data.

I am now using the printf function to send the information.

Is there a way to bring the actual sending out of the loop?
At the moment I lose an interrupt while waiting for the function to end.
Is there a kind of hardware register that I can fill and that will do the sending outside my main loop?

If it is outside the main loop, it has plenty of time to send, since I have to send only once each rotation.

I use a 18f2620.

[Ttelmah]

Yes.
For sending, look at STISR.C
Takes only a few uSec to put the data into a buffer.

Best Wishes

[Blob]

Great, this solved the matter