What is the "Capacitive touch sensor" and the "LCD interface"

JustNopIt
Posts: 22
Joined: Wed Jul 13, 2016 10:14 am

What is the "Capacitive touch sensor" and the "LCD interface"

Postby JustNopIt » Tue Aug 30, 2016 1:02 pm

I read that the ESP-32 will have a "Capacitive touch sensor" and an "LCD interaface". What exactly is meant by that?
Could I solder an old cellphone touch screen directly to it, without SPI or i2c?

WiFive
Posts: 3529
Joined: Tue Dec 01, 2015 7:35 am

Re: What is the "Capacitive touch sensor" and the "LCD interface"

Postby WiFive » Tue Aug 30, 2016 8:18 pm

Touch sensor is for buttons like you see on a microwave keypad. LCD interface could be through SPI or maybe HS1 8-bit interface.

ESP_Sprite
Posts: 9709
Joined: Thu Nov 26, 2015 4:08 am

Re: What is the "Capacitive touch sensor" and the "LCD interface"

Postby ESP_Sprite » Wed Aug 31, 2016 3:43 am

WiiFive is right about the capacitive touch screen display. The LCD interface is basically an 8, 16 or 24-bit parallel interface connected to DMA that makes it very fast to upload data to parrallel LCDs or other peripherals. (It's actually part of one of the I2S ports.)

WiFive
Posts: 3529
Joined: Tue Dec 01, 2015 7:35 am

Re: What is the "Capacitive touch sensor" and the "LCD interface"

Postby WiFive » Wed Aug 31, 2016 6:40 am

ESP_Sprite wrote:(It's actually part of one of the I2S ports.)
Ah, look forward to reading about that soon in an update to the technical reference manual. ;)

http://opencores.org/project,i2s_to_parallel

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