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Endalvik

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  1. Endalvik

    ginput: Touch invert/flip

    Update: working around this by creating and retrieving hard-coded calibration data, per the wiki. I am not needing general calibration, as the touch/LCD are physically matched (aside from the flipped/inverted Y). Now have this in my custom board_framebuffer.h: // Force in calibration data, to compensate for hardware configuration float calibrationData[] = { 1, // ax: no change 0, // bx: no change 0, // cx: no change 0, // ay -1, // by: flip Y axis SCREEN_HEIGHT-1 // cy: flip Y axis }; gBool LoadMouseCalibration(unsigned instance, void *data, gMemSize sz) { if( sz != sizeof( calibrationData ) || instance != 0 ) { return FALSE; } memcpy( data, (void *)&calibrationData, sz ); return gTrue; } However, this is not ideal as now every single touch/movement now has costly floating-point math overhead. I am open to suggestions on a lower-overhead (yet consistent) way of handling touch hardware that is flipped/inverted. Thanks.
  2. Endalvik

    ginput: Touch invert/flip

    I have a LCD panel that implements capacitive touch using the FT5406. Oddly, the touch Y axis is inverted/flipped relative to the display Y axis. To compensate for this, I would like to add an axis invert/flip option. I cannot find any such option while inspecting the code for ginput / gmouse / FT5x06 driver, etc -- though perhaps I am simply missing it. Can you recommend how best to add this too the code? For instance, would it be appropriate to add "flipY" (and "flipX") flags to the GMouse struct, and then allow read_xyz() to perform the inversion arithmetic? Thanks!
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