Author Topic: Timers in the Nspire (Read 5702 times)

lkj · « **on:** October 21, 2011, 02:17:05 pm »

Can anybody explain me how to use the timers of the nspire, pls? I haven't ever used timers before and don't understand the explanations on hackspire.

Jim Bauwens · « **Reply #1 on:** October 22, 2011, 01:29:27 pm »

Its quite easy:

Spoiler For Lua:

Code: (Lua) [Select]

msg = "tick"
function on.create ()
   timer.start(1) --start the timer, make it tick every second
end
function on.paint(gc)
    gc:drawString(msg, 10, 10, "top")
end

function on.timer()
    if msg == "tick" then
        msg = "tack"
    else
        msg = "tick"
    end
    platform.invalidate()
end

Sorry, I thought this was a lua question

lkj · « **Reply #2 on:** October 22, 2011, 03:13:26 pm »

No, I can't code in lua

Adriweb · « **Reply #3 on:** October 22, 2011, 03:15:11 pm »

(although it's easier than C/native)

Chockosta · « **Reply #4 on:** November 01, 2011, 08:35:37 am »

Well, a while ago, I started a project which was supposed to be a 84+ like clock for the nspire. (With Ndless)
But Lua came, so I gave up.

Here is the code used to display the time :

Code: [Select]

    bufDrawString(buf, 50, 0, "Nspire clock - By Loic Pujet", 0);
    uint32_t time = *(volatile uint32_t*) 0x90090000;
    sprintf(clock, "%lu : %lu : %lu", (time%86400)/3600, (time%3600)/60, time%60);
    bufDrawString(buf, 115, 150, clock, 0);

EDIT : Oops, I haven't seen that this post was quite old.
But maybe it will be useful for someone

lkj · « **Reply #5 on:** November 02, 2011, 02:26:26 pm »

I know how to use the Real Time Clock, but I don't know about the timer at address 0x900D0000.

Chockosta · « **Reply #6 on:** November 02, 2011, 02:30:08 pm »

Oh, sorry.

Well I only use this timer as a random seed...
So I don't know how it works.

lkj · « **Reply #7 on:** December 15, 2011, 05:23:24 pm »

I figured out how it works by now, but I have a problem with my program doing nothing for some seconds. I think this is caused by the ndless function wait_no_key_pressed(). Should this function work normally if I change the timer divider and some other things with the timer? Or does it also use the timers and my changes make it work strange?

calc84maniac · « **Reply #8 on:** December 16, 2011, 10:26:19 am »

Quote from: lkj on December 15, 2011, 05:23:24 pm

I figured out how it works by now, but I have a problem with my program doing nothing for some seconds. I think this is caused by the ndless function wait_no_key_pressed(). Should this function work normally if I change the timer divider and some other things with the timer? Or does it also use the timers and my changes make it work strange?

wait_no_key_pressed() does use the timer because it calls the idle() function to save power. The equivalent without power saving is while(any_key_pressed());

lkj · « **Reply #9 on:** December 17, 2011, 05:31:41 pm »

Thank you, now it works.

Author Topic: Timers in the Nspire (Read 5702 times)

lkj

Timers in the Nspire

Jim Bauwens

Re: Timers in the Nspire

lkj

Re: Timers in the Nspire

Adriweb

Re: Timers in the Nspire

Chockosta

Re: Timers in the Nspire

lkj

Re: Timers in the Nspire

Chockosta

Re: Timers in the Nspire

lkj

Re: Timers in the Nspire

calc84maniac

Re: Timers in the Nspire

lkj

Re: Timers in the Nspire