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Clarification about I2S NT35510 driver

Posted: Fri Sep 06, 2019 9:49 am
by maldus
Hello everyone,
I am experimenting with different LCD color displays to find out the best option for a future product.
I have so far tested ILI9341 (directly supported in the WROVER kit) and ILI9488 (accessible with some fiddling) through their SPI interface.

I also bought a 4 inches LCD controlled by an NT35510. I am interested mainly in SPI interfaces because of the ESP32 reduced number of pins; the NT35510 however only supports the SPI+RGB interface, which still requires at least 24 lines.

I noticed however that the esp-iot-sulution repository has an example driver for the NT35510 using the I2S peripheral. Although I never used it I was convinced the I2S to be a serial audio transmission protocol: here it used instead as some kind of parallel RGB communication (possibly similar to 8080). What am I missing?

Also, it appears that the examples could be made to work with just 8 lines of data (as opposed to the 16 pins specified by this readme ... ) through the `CONFIG_BIT_MODE_8BIT` configuration option. Is this correct?

Thanks in advance for the assistance.