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Embedded system c-code for I2C-connected character LCD displays such as AQM0802 (Beaglebone Black, Raspberry Pi, ...)

C 87.24% Shell 12.76%

character-lcd raspberry-pi i2c-lcd embedded beaglebone-black

i2c-lcd's Introduction

i2c-lcd

HD44870 character LCD display via PCF8574 backpack module

pcf8574-lcd-demo.c is example C code how to drive a standard HD44870 character LCD display over a I2C-connected PCF8574-based backpack module. Tested on a Raspberry Pi 3.

2x8 mini-LCD type AQM0802 over I2C

Remaining code is a set of LCD programs that drive a mini-LCD type AQM0802 over the I2C bus of embedded systems. This includes popular devices like the BeagleBone Black, or the Raspberry Pi. The C code is based on a previous embedded C library for HD44780-based character LCD.

The AQM0802 2x8 character LCD is a downsized module that fits the scale of credit-card-sized boards, and can provide output of critical paramaters, such as the current WiFi DHCP address assignment.

Beaglebone Black example, using a prototype cape:

See also http://blog.fm4dd.com/?p=896

Interfacing the AQM0802 LCD display with a Raspberry Pi:

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