This project deals with Interfacing a ST7565 SPI based Graphic LCD to Raspberry Pi using GPIO and SPI peripherals.
We use the SPI0 interface on the Raspberry Pi P1/J1 connector along with a couble of GPIO pins to control the LCD. The backlight is connected using a 150ohm 2W resistance to give decent backlight for the LCD.
Here is the pin configuraiton:
Rpi Connector ST7565 LCD
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3.3v (Pin01) - LCD Back A
GND (Pin09) - LCD Back K
GND (Pin06) - GND
3.3V (Pin17) - VCC
GPIO10(SPI_MOSI) - SID
GPIO11(SPI_CLK) - SCLK
GPIO24 - A0
GPIO25 - nRST
GPIO08(SPI_CE0N) - nCS
Using the pigpio we were able to prepare an application driver
to interface to this LCD.
This program help to initialize, write and draw graphic on this LCD via a command line interface on Raspberry Pi.
The commercially available LCD part:
Adafruit White LED ST7565 LCD
Product: http://www.adafruit.com/products/250
LCD Data-sheet: http://goo.gl/pZO0Ng
Most of the details are packed up with this program.
The next steps would be integrate this driver into the Frame Buffer kernel driver inside Raspberry Pi.
License: This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.