NanoVNA2-firmware
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Touchscreen calibration wrong when display is flipped.
When the display is flipped, touchscreen calibration doesn't work correctly.
Work around : when touchscreen calibration indicating upper left corner, tap in lower right corner. when indicating lower right corner, tap in upper left corner.
Not correct default calibration setting for LCD, need fix it
easy solved ... just do the calibration after upgrade fw and after flipping lcd and then SAVE it