I bought Arduino 1.8" TFT screen few mouths before, i try to use it today but it didn't work.
It just display black and white bar, i upload TFT example of " Arduino TFT Bitmap Logo example" to mega 2560 and uno. Both if them can work. I want to know does the screen broken? Anyone had same problem before?
Thanks.
I bought Arduino 1.8" TFT screen few mouths before
Is that a few mouths measured by height or width?
I too had an issue with my 1.8" TFT when I first got it, I followed the wiring diagram that came with it and nothing worked. Then with a little common sense, I found out it was just a wiring issue, but on their end.
Try this sketch.
// Pins SCLK and MOSI are fixed in hardware, and pin 10 (or 53)
// must be an output
//#define sclk/SCL 13 // for MEGAs use pin 52
//#define mosi/SDA 11 // for MEGAs use pin 51
#define cs 10 // for MEGAs you probably want this to be pin 53
#define dc 9
#define rst 8 // you can also connect this to the Arduino reset
// Color definitions
#define BLACK 0x0000
#define BLUE 0x001F
#define RED 0xF800
#define GREEN 0x07E0
#define CYAN 0x07FF
#define MAGENTA 0xF81F
#define YELLOW 0xFFE0
#define WHITE 0xFFFF
#include <ST7735.h>
#include <SPI.h>
// Option 1: use any pins but a little slower
//ST7735 tft = ST7735(cs, dc, mosi, sclk, rst);
// Option 2: must use the hardware SPI pins
// (for UNO thats sclk = 13 and sid = 11) and pin 10 must be
// an output. This is much faster - also required if you want
// to use the microSD card (see the image drawing example)
ST7735 tft = ST7735(cs, dc, rst);
void fillpixelbypixel(uint16_t color) {
for (uint8_t x=0; x < tft.width; x++) {
for (uint8_t y=0; y < tft.height; y++) {
tft.drawPixel(x, y, color);
}
}
delay(100);
}
void setup(void) {
Serial.begin(115200);
Serial.print("hello!");
tft.initR(); // initialize a ST7735R chip
Serial.println("init");
tft.writecommand(ST7735_DISPON);
uint16_t time = millis();
tft.fillScreen(BLACK);
time = millis() - time;
Serial.println(time, DEC);
delay(500);
//
tft.fillScreen(BLACK);
testdrawtext("Lorem ipsum dolor sit amet, consectetur adipiscing elit. Curabitur adipiscing ante sed nibh tincidunt feugiat. Maecenas enim massa, fringilla sed malesuada et, malesuada sit amet turpis. Sed porttitor neque ut ante pretium vitae malesuada nunc bibendum. Nullam aliquet ultrices massa eu hendrerit. Ut sed nisi lorem. In vestibulum purus a tortor imperdiet posuere. ", WHITE);
delay(10000);
//a single pixel
tft.drawPixel(tft.width/2, tft.height/2, GREEN);
delay(500);
// line draw test
testlines(YELLOW);
delay(500);
// optimized lines
testfastlines(RED, BLUE);
delay(500);
testdrawrects(GREEN);
delay(500);
testfillrects(YELLOW, MAGENTA);
delay(500);
tft.fillScreen(BLACK);
testfillcircles(10, BLUE);
testdrawcircles(10, WHITE);
Serial.println("done");
delay(1000);
}
void loop() {
tft.writecommand(ST7735_INVON);
delay(500);
tft.writecommand(ST7735_INVOFF);
delay(500);
}
void testlines(uint16_t color) {
tft.fillScreen(BLACK);
for (uint16_t x=0; x < tft.width; x+=6) {
tft.drawLine(0, 0, x, tft.height-1, color);
}
for (uint16_t y=0; y < tft.height; y+=6) {
tft.drawLine(0, 0, tft.width-1, y, color);
}
tft.fillScreen(BLACK);
for (uint16_t x=0; x < tft.width; x+=6) {
tft.drawLine(tft.width-1, 0, x, tft.height-1, color);
}
for (uint16_t y=0; y < tft.height; y+=6) {
tft.drawLine(tft.width-1, 0, 0, y, color);
}
tft.fillScreen(BLACK);
for (uint16_t x=0; x < tft.width; x+=6) {
tft.drawLine(0, tft.height-1, x, 0, color);
}
for (uint16_t y=0; y < tft.height; y+=6) {
tft.drawLine(0, tft.height-1, tft.width-1, y, color);
}
tft.fillScreen(BLACK);
for (uint16_t x=0; x < tft.width; x+=6) {
tft.drawLine(tft.width-1, tft.height-1, x, 0, color);
}
for (uint16_t y=0; y < tft.height; y+=6) {
tft.drawLine(tft.width-1, tft.height-1, 0, y, color);
}
}
void testdrawtext(char *text, uint16_t color) {
tft.drawString(0, 0, text, color);
}
void testfastlines(uint16_t color1, uint16_t color2) {
tft.fillScreen(BLACK);
for (uint16_t y=0; y < tft.height; y+=5) {
tft.drawHorizontalLine(0, y, tft.width, color1);
}
for (uint16_t x=0; x < tft.width; x+=5) {
tft.drawVerticalLine(x, 0, tft.height, color2);
}
}
void testdrawrects(uint16_t color) {
tft.fillScreen(BLACK);
for (uint16_t x=0; x < tft.width; x+=6) {
tft.drawRect(tft.width/2 -x/2, tft.height/2 -x/2 , x, x, color);
}
}
void testfillrects(uint16_t color1, uint16_t color2) {
tft.fillScreen(BLACK);
for (uint16_t x=tft.width-1; x > 6; x-=6) {
tft.fillRect(tft.width/2 -x/2, tft.height/2 -x/2 , x, x, color1);
tft.drawRect(tft.width/2 -x/2, tft.height/2 -x/2 , x, x, color2);
}
}
void testfillcircles(uint8_t radius, uint16_t color) {
for (uint8_t x=radius; x < tft.width; x+=radius*2) {
for (uint8_t y=radius; y < tft.height; y+=radius*2) {
tft.fillCircle(x, y, radius, color);
}
}
}
void testdrawcircles(uint8_t radius, uint16_t color) {
for (uint8_t x=0; x < tft.width+radius; x+=radius*2) {
for (uint8_t y=0; y < tft.height+radius; y+=radius*2) {
tft.drawCircle(x, y, radius, color);
}
}
}
Had the same problem with the 1.77" TFT and an UNO.
Solution: installed the nightly build of the IDE. Now it is working fine.