Arduino 1.77" display
From wikiluntti
Introduction
Connections and Libraries
| Arduino | Display | Name | Purpose | No needed? | Constructor 2! |
|---|---|---|---|---|---|
| 3.3V | 8 LEDA | Lite | Backlight control | ||
| 10 | 7 CS | Chip Select / DC (Data/Command) | SS PIN / SPI data or command selector [SS = Slave Select] | Yes | Yes |
| 9 | 6 RS | Register Selection | MISO - Sending to Master | Yes | Yes |
| 8 | 5 RES | Reset / RST | Reset the TFT | Yes | Yes |
| 11 | 4 SDA | Serial Data | MOSI - Sending to Slave | Yes | |
| 13 | 3 SCK | SCLK - Clock Line | SPI Clock Input | Yes | |
| 5V | 2 VCC | Voltage Common Collector | |||
| GND | 1 GND | Ground | Ground |
Install and Download library:
Sketch -> Include Library -> Add .ZIP Library
Theory: SPI protocol
Serial Peripheral Interface
The SPI enabled device typically has the following pins:
- SS: A line indicating slave device selection
- MISO and MOSI (Master In Slave Out): A line for sending serial data to the Master device
- SCK/SCLK (Serial Clock): A clock signal generated by the Master device to synchronize data transmission, so the slave device knows when to read the input.
- RESET: A line for restarting the transmission process.
Code 1
Source code from https://www.arthurwiz.com/software-development/177-inch-tft-lcd-display-with-st7735s-on-arduino-mega-2560
#include <Adafruit_GFX.h>
#include <Adafruit_ST7735.h>
#include <SPI.h>
#define TFT_CS 10
#define TFT_RST 8
#define TFT_DC 9
#define TFT_SCLK 13
#define TFT_MOSI 11
//Adafruit_ST7735 tft = Adafruit_ST7735(TFT_CS, TFT_DC, TFT_RST);
Adafruit_ST7735 tft = Adafruit_ST7735(TFT_CS, TFT_DC, TFT_MOSI, TFT_SCLK, TFT_RST);
void setup(void) {
tft.initR(INITR_BLACKTAB);
tft.fillScreen(ST7735_BLACK);
tft.setTextColor(ST7735_WHITE);
tft.setTextSize(0);
tft.setCursor(30,80);
tft.println("Hello World!");
delay(1000);
}
void loop() {
tft.fillScreen(ST7735_WHITE);
delay(1000);
tft.setTextColor(ST7735_BLACK);
tft.setTextSize(0);
tft.setCursor(30,80);
tft.println("Toimii!!");
delay(500);
}
