mifmasterz / st7735

C library for ST7735 LCD driver

C Library for ST7735 1.8 TFT LCD display

ST7735 Description

Detailed information are described in Datasheet ST7735. New version 2.0 allow to connect more than 1 display.

Library

C library is aimed for driving ST7735 1.8 TFT LCD display 162x132 through SPI's Atmega328P / Atmega8 / Atmega16A.

Hardware connection ATMEGA328P -> LCD1

PORT LCD	PORT ATMEGA328P	Description
RST	PORTD 7	Chip Reset Signal
CS	PORTB 2	SPI Chip Select
D/C	PORTB 0	SPI data / command; 1=Data, 0=Command
DIN	PORTB 3	SPI Serial data in / MOSI
CLK	PORTB 5	SPI Serial clock signal
UCC	+5V	Supply Voltage +5V
BL	PORTB 1	Backlight control (with resistor 40-150 Ohm)
GND	GND	Ground

Hardware connection ATMEGA328P -> LCD2

PORT LCD	PORT ATMEGA328P	Description
RST	PORTD 3	Chip Reset Signal
CS	PORTD 0	SPI Chip Select
D/C	PORTB 0	SPI data / command; 1=Data, 0=Command
DIN	PORTB 3	SPI Serial data in / MOSI
CLK	PORTB 5	SPI Serial clock signal
UCC	+5V	Supply Voltage +5V
BL	PORTD 1	Backlight control (with resistor 40-150 Ohm)
GND	GND	Ground

Usage

Prior defined for MCU Atmega16 / Atmega8 / Atmega328P. Need to be carefull with SPI ports definition.

PORT	Atmega16	Atmega8 / Atmega328
SS	PB4	PB2
MOSI	PB5	PB3
MISO	PB6	PB4
SCK	PB7	PB5

Tested

Library was tested and proved on a ST7735 1.8″ TFT Dispay with Atmega328P.

Demonstration

Links

• Datasheet ST7735
• Adafuit TFT
• AVR TFT