Timer in Flowcode V6

[Alex]

Hi there,

I am looking to start a timer which will count from 0 in mili seconds (1.23 seconds) and then display this count on an LCD display and at any point when a switch is pressed the counter will stop and display the time on the LCD display. Not sure the best way to do this. any advice would be great!

Alex

[medelec35]

The timer should be easy enough to create using a timer interrupt, but how will you observe the change in ms on an LCD?
one value will merge into the next value. Your eyes will not be able to differentiate the individual ms.
I would of thought You will see just 8's until display has stopped.

[JonnyW]

Hi.

Try adding into a timer interrupt something like:

counter = counter + 1
update_flag = ((counter & 31) == 0)

Then in your main loop add a decision:

if (update_flag)
lcd_clear()
lcd_print( counter )

This might slow the display down so it is not constantly working giving you values you can never see anyway. Vary the 31 (always a power of 2 minus 1, so 3, 7, 15, 31, 63...) to get a decent refresh rate.

Cheers,

Jonny

[Alex]

It doesn't have to show the individual ms when counting up however i just need it to display the ms at the end when the timer has stopped.

thanks for the help guys

[medelec35]

That should be ok to do.
You can get a timer interrupt to increment a int variable by 1 every 1ms. You can either use a variable ot bypass the count when timing is not required, or just disable timer to interrupt to stop counting.

What hardware will you be using e.g target device, type of osc and its running frequency?