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