Introduction
As I mentioned in the first post of this series the intention is to port an fbdev driver to DRM. In this article I will present the hardware I will use for that purpose.
Raspberry Pi 4
The Raspberry Pi is a small board, the first version of which was introduced in 2012. This board is very well known and well supported. I was lucky enough to buy one two years ago while there was a shortage, so I will use it for development purposes.
The next diagram shows the pinout for the board. I’ll use it later on to show how to connect everything.
 |
|---|
| *Source: https://www.raspberrypi.com/documentation/computers/raspberry-pi.html |
AZDelivery 12864
The AZDelivery 12864 is a monochromatic LCD Display Module. It has a resolution of 128x64 and it’s very easy to find and buy. The controller is compatible with KS0108.
The display diagram:
How to connect it
Below is the table explaining how to connect the PINs to each other.
| Raspberry Pi 4 | AZDelivery 12864 |
|---|---|
| 6 (Ground) | 1 (GND) |
| 4 (5V power) | 2 (VCC) |
| 4 (5V power) | 3 (V0) |
| 24 (GPIO 8 CE0) | 4 (RS) |
| 19 (GPIO 10 MOSI) | 5 (R/W) |
| 23 (GPIO 11 SCLK) | 6 (E) |
| 6 (Ground) | 15 (PSB) |
| 4 (5V power) | 19 (BLA) |
| 6 (Ground) | 20 (BLK) |
These are some picture of the final result:
