Detecting multiple button presses

omlette · Post by **omlette** » Sat Sep 30, 2006 5:11 am

What's the correct way to detect if a user is pressing more than one button? I've been using the following method, which only seems to work if one button is pressed:

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sceCtrlPeekBufferPositive&#40;&paddata, 1&#41;;
if&#40;paddata.Buttons & PSP_CTRL_blah & PSP_CTRL_blah2&#41;
&#123;
...
&#125;

Thanks

Insert_witty_name · Post by **Insert_witty_name** » Sat Sep 30, 2006 5:17 am

You have a couple of options, all really down to preference really. I use the following in one of my projects:

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if &#40;pad.Buttons & PSP_CTRL_UP && pad.Buttons & PSP_CTRL_TRIANGLE&#41;

omlette · Post by **omlette** » Sat Sep 30, 2006 5:22 am

Thank you :)

Aion · Post by **Aion** » Sat Sep 30, 2006 1:15 pm

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u32 uWantedKeys;
uWantedKeys = PSP_CTRL_UP | PSP_CTRL_TRIANGLE; //As many other as you want

if&#40; &#40;pad.Buttons & uWantedKeys&#41;  == uWantedKeys &#41;
   // Do whatever

Or

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u32 uWantedKeys;
uWantedKeys = PSP_CTRL_UP;
uWantedKeys |= PSP_CTRL_TRIANGLE; 
//... As many other as you want

if&#40; &#40;pad.Buttons & uWantedKeys&#41;  == uWantedKeys &#41;
   // Do whatever

Dremth · Post by **Dremth** » Mon Oct 30, 2006 5:09 am

Neither of those worked for me. I think it may have something to do with the: "u32". What is u32?

Aion wrote:

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u32 uWantedKeys;
uWantedKeys = PSP_CTRL_UP | PSP_CTRL_TRIANGLE; //As many other as you want

if&#40; &#40;pad.Buttons & uWantedKeys&#41;  == uWantedKeys &#41;
   // Do whatever

Or

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u32 uWantedKeys;
uWantedKeys = PSP_CTRL_UP;
uWantedKeys |= PSP_CTRL_TRIANGLE; 
//... As many other as you want

if&#40; &#40;pad.Buttons & uWantedKeys&#41;  == uWantedKeys &#41;
   // Do whatever

hlide · Post by **hlide** » Mon Oct 30, 2006 6:57 am

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#define BOTH_UP_AND_TRIANGLE_PRESSED &#40;PSP_CTRL_UP|PSP_CTRL_TRIANGLE&#41;

if &#40;&#40;pad.Buttons & BOTH_UP_AND_TRIANGLE_PRESSED&#41; == BOTH_UP_AND_TRIANGLE_PRESSED&#41;
&#123;
  // do whatever you want when both UP and TRIANGLE are pressed
&#125;

Aion's examples are not bad, but to create a variable to keep a constant is not something I would expect for such trivial thing, especially if you don't use before or after u32 a "const" directive.

usually u32 is declared that way :

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typedef unsigned int u32;

Dremth · Post by **Dremth** » Mon Oct 30, 2006 9:33 am

Ok. Thanks a bunch!

Aion · Post by **Aion** » Mon Oct 30, 2006 1:48 pm

I wouldn't usually store it in a variable, but I wanted the code to be as clear as possible for the example.