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bit-banged LCD driver

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banh

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The attached driving waveform is taken from Renesas 38024 MCU manual.

However, the MCU i'm using does not have LCD driver module.

so i think about generating the waveform using i/o ports.

however, the waveform has 3 levels (V1, V2, V3): how to achieve this?

has anyone done sth similar to this before?
 

albert22

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See the
AN563 Using PIC16C5X Microcontrollers as LCD Drivers
at the microchip site.
I think that it is exactly what you want.
 

    banh

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banh

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hi,
i also found another application note..
https://us.st.com/stonline/books/ascii/docs/2496.htm

but i found that most application notes do not go about explaining generating the waveform, especially the COMmon backplane's waveforms which have 3 levels of voltage.

any idea to generate the waveform for COM pins?
 

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