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How do I invert the display (toggle dots which are ON to OFF, and vice-versa) on a 16x2 character LCD interfaced with PSoC 3/ PSoC 5LP using PSoC Creator?
You can use the custom character set of the LCD and create your own symbols, as shown in the diagram below:
However, you have only a limited set of characters in the custom character map. In addition, you cannot directly control the pixels because they are handled by the driver IC inside the LCD module. As a workaround, consider using a graphic LCD where you can control pixels on the display.