https://dsibrew.org/w/index.php?action=history&feed=atom&title=Sourcecode%2Ftp.c 2026-05-02T11:49:54Z Revision history for this page on the wiki MediaWiki 1.43.1 https://dsibrew.org/w/index.php?title=Sourcecode/tp.c&diff=2800&oldid=prev 2010-03-21T01:24:06Z

<p>New page: &lt;source lang=cpp&gt; <span class="autocomment">Read touchscreen positions. Returns 1 if touched, and the average position in xpos and ypos. Otherwise, if not touched, returns 0.: </span> u32 TouchRead(u32* xp...</p> <p><b>New page</b></p><div>&lt;source lang=cpp&gt;<br /> <br /> /*<br /> Read touchscreen positions.<br /> <br /> Returns 1 if touched, and the average position in xpos and ypos. Otherwise, if not touched, returns 0.<br /> */<br /> <br /> u32 TouchRead(u32* xpos, u32* ypos)<br /> {<br /> int i;<br /> u8 buf[20];<br /> u16 x[5];<br /> u16 y[5];<br /> u32 xavg;<br /> u32 yavg;<br /> u8 state;<br /> <br /> <br /> state = CDC_ReadRegisterEx(3,9);<br /> if ( (state &amp; 0xC0) == 0x40 )<br /> return 0;<br /> <br /> state = CDC_ReadRegisterEx(3, 14);<br /> if (state &amp; 2)<br /> return 0;<br /> <br /> <br /> CDC_ReadRegistersEx(252, 1, buf, 20);<br /> <br /> xavg = 0;<br /> yavg = 0;<br /> <br /> for(i=0; i&lt;5; i++)<br /> {<br /> x[i] = buf[i*2+1] | (buf[i*2+0]&lt;&lt;8);<br /> y[i] = buf[10+i*2+1] | (buf[10+i*2+0]&lt;&lt;8);<br /> <br /> if (x[i] &amp; 0xF000)<br /> return 0;<br /> <br /> if (y[i] &amp; 0xF000)<br /> return 0;<br /> <br /> xavg += x[i];<br /> yavg += y[i];<br /> }<br /> <br /> xavg /= 5;<br /> yavg /= 5;<br /> <br /> *xpos = xavg;<br /> *ypos = yavg;<br /> <br /> return 1;<br /> }<br /> &lt;/source&gt;</div>

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