Blame view

RIOT/tests/driver_hd44780/README.md 1.3 KB
a752c7ab   elopes   add first test an...
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
  # About
  
  This is a test application for the HD44780 LCD driver. This display comes with
  many Arduino starter kits under the name of LCM1602C, and typically has 16x2
  columns and rows.
  
  # Details
  
  This test application will initialize the HD44780 driver with the configuration
  as specified in the default `hd44780_params.h` file. To connect the display with
  your board use the following minimal pinout for the LCD (i.e., Arduino here):
  
  - Pin 1 is connected directly to GND.
  - Pin 2 is connected directly to VCC +5V.
  - Pin 3 is used to set LCD contrast, for max use +5V or a 10k potentiometer.
  - Pin 4 (RS or "register select") is connected to pin 2 on the Arduino
  - Pin 5 (RW or "read/write") is connected directly to GND, i.e., unused.
    Also note: if you connect RW to your board that the LCD is driven by 5V, while
    many boards internally run at 3.3V - so this could fry the board :/
  - Pin 6 (EN or "enable") is connected to pin 3 on the Arduino.
  - Pins 7 - 10: Not connected.
  - Pin 11 on the LCD is connected to pin 4 on the Arduino.
  - Pin 12 on the LCD is connected to pin 5 on the Arduino.
  - Pin 13 on the LCD is connected to pin 6 on the Arduino.
  - Pin 14 on the LCD is connected to pin 7 on the Arduino.
  - Pin 15 is connected to one end of a 1k resistor, and its other end to VCC +5V.
  - Pin 16 is connected directly to GND.