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using a timer to pause   Message List  
Reply | Forward Message #10737 of 15019 |
Re: [gbadev] Re: using a timer to pause

> > ScanlineCounter = (volatile u16*)0x4000006; //this is the
> > scan line counter
>
> you should declare ScanlineCounter a vu16* (volatile).

Er. Maybe I'm misunderstanding. Can't you get away with it during
declaration like he did there? Like, I thought a typedef was really a
special form of a macro?


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Sun Mar 31, 2002 12:56 am

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johnisaheadcase
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Forward 		Message #10737 of 15019 |
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I'm using the code from devoto's pern project (the Wait() function) to attain the proper speed for some animation in mode 4. I'm making a call to this function... 		j_north2002
Offline Send Email 		Mar 29, 2002
6:26 pm

Is the Wait() function doing a vsync wait or just an empty loop wait? ... From: j_north2002 [mailto:jmartin10@...] Sent: 29 March 2002 18:19 To:...
Martin Piper
fnagaton
Offline Send Email 		Mar 29, 2002
7:31 pm

... wait? Correction - dovoto not devoto sorry... I cut and pasted the code from his tutorial /************************************\ * Timers.h by dovoto * ...
j_north2002
Offline Send Email 		Mar 29, 2002
9:21 pm

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John Q. Pretentious
johnisaheadcase
Offline Send Email 		Mar 29, 2002
10:49 pm

... function) ... making a ... that ... simpler ... get them ... my current ... ok, i'm now calling the following code from a drawing loop to try to get some...
j_north2002
Offline Send Email 		Mar 30, 2002
12:05 pm

you should declare ScanlineCounter a vu16* (volatile)....
Jan-Lieuwe Koopmans
jan-lieuwe@...
Send Email 		Mar 30, 2002
2:42 pm

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John Q. Pretentious
johnisaheadcase
Offline Send Email 		Apr 2, 2002
8:17 pm

... C typedefs aren't true macros, but they act the same way. (volatile u16 *) does work on hardware, even at GCC optimization level 3. Here's an excerpt from...
yerricde
Offline Send Email 		Apr 2, 2002
9:06 pm

... That wasn't declaration, it was assignment. He cast 0x40000006 as a volatile u16* value, then assigned it to a non-volatile u16* variable. Since ...
Mike Danylchuk
evi1twin
Offline Send Email 		Apr 2, 2002
9:34 pm

... had ... loop when ... I think all of the suggestions actually worked. I had just begun using double buffering and neglected to flip the buffers in a new ...
j_north2002
Offline Send Email 		Apr 11, 2002
8:26 am

Hello, ... Just out of pure curiosity -- does anyone know whether there's any difference between this code and testing display status register (there are bits...
Maciej Sinilo
yarpen2002
Offline Send Email 		Apr 11, 2002
7:46 pm

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John Q. Pretentious
johnisaheadcase
Offline Send Email 		Apr 3, 2002
6:39 am
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