#129199 - naleksiev - Sun May 20, 2007 4:43 pm
Hello. This is my arm7 test.
| Code: |
void VblankHandler(void)
{
BG_PALETTE_SUB[1]++;
}
int main()
{
irqInit();
irqSet(IRQ_VBLANK, VblankHandler);
// Keep the ARM7 idle
while (1) swiWaitForVBlank();
} |
I was hoping to figured out if my arm7 code works at all before I start writing the real functionality, unfortunately it doesn't.
If I add the VblankHandler to my arm9 code I can see the background changing
| Code: |
void VblankHandler(void)
{
BG_PALETTE_SUB[1]++;
} |
I couldn't find what's wrong with my code.
- Is my code wrong and why?
- Is there something special that I need to do to make both CPUs boot? Right now I just compile the arm7 and arm9 parts separately and then combine them with ndstool.exe from devkitARM.
#129205 - Lick - Sun May 20, 2007 6:01 pm
ARM7 doesn't have access to the 2D graphics engine.
You really should download the libnds examples and use the template projects. Those contain prewritten Makefiles and a lot of good stuff.
_________________
http://licklick.wordpress.com
#129214 - naleksiev - Sun May 20, 2007 6:36 pm
I know about this template and still I want to use my Makefile, it's using the same steps as the template.
I notice that arm7 doesn't have any of the graphics defines. So I add the define BG_PALETTE_SUB . Is this what you mean by arm7 doesn't have access to the 2D graphics engine? Or maybe it doesn't have access to the this part of the memory?
| Code: |
| #define BG_PALETTE_SUB ((uint16*)0x05000400) |
#129220 - tepples - Sun May 20, 2007 6:53 pm
| naleksiev wrote: |
| I notice that arm7 doesn't have any of the graphics defines. So I add the define BG_PALETTE_SUB . Is this what you mean by arm7 doesn't have access to the 2D graphics engine? Or maybe it doesn't have access to the this part of the memory? |
The latter is the case. You will need to run graphics code on the ARM9.
_________________
-- Where is he?
-- Who?
-- You know, the human.
-- I think he moved to Tilwick.
#129228 - naleksiev - Sun May 20, 2007 7:30 pm
Thank you!
I'll assume that my arm7 code is executed correct and I'll proceed with the sound code for it.
#129366 - naleksiev - Tue May 22, 2007 4:15 am
Finally I can send all messages I want to the arm7 and my sound is working. Once I setup the sound channel I can't modify it. For example I tried to change the panning but nothing is changing in the sound. Also I tried to play a new sound on the same channel also without success.
The only way I can modify something or run a new sound is if I first stop the channel and then setup a new one.
But then I have another issue it can't be done in the same frame.
Can someone give me an idea what's wrong. Is there a workaround or maybe gave me some docs about sound on NDS.
Thank you.
#129408 - Lick - Tue May 22, 2007 4:17 pm
Panning: it should be changeable while the channel is playing.
Another sound: use another channel.
Docs: try gbatek. (gzipped)
_________________
http://licklick.wordpress.com
#129409 - naleksiev - Tue May 22, 2007 4:24 pm
I'm 90% sure it's not changeable :( Or maybe I need to do something else after I set the panning bits?
I'll give a try to be sure it wasn't my fault.
And thank you for the specification.