bit-banged LCD driver

[banh]

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]

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

 

[banh]

hi,
i also found another application note..
**broken link removed**

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?