For some reason the 0.96" 160x80 TFT display I just bought from Aliexpress seems not to work with the Adafruit ST7735 library.
I was using the library's example "graphicstest" and I noticed that the right 1/5 of the screen is not displaying anything - the graphic test only starts from the 4/5.
I wonder if this has something to do with the library compatibility. Wonder if anyone has run into similar issues. Thank you in advance.
what screen dimensions are specified in "graphicstest"?
By the way, in my mind anyway, the right 1/5 of a 5/5 is the 4/5. So I'm not sure what you mean exactly.
I used this specification
// OR use this initializer (uncomment) if using a 0.96" 160x80 TFT:
tft.initR(INITR_MINI160x80); // Init ST7735S mini display
Did you remember to comment the default line?
Yes, I just double checked that I commented the default lines.
Here are the pictures of the module, and the issue.
https://ibb.co/PjjGWzJ
https://ibb.co/KVHhM0h
sorry about the confusion, please refer to the picture in #5 and you will see what I mean.
Is the image rotated 90 degrees?
To clean things up a little bit I just ran a simple loop - to display black-red-green-blue for a second each.
It seems like this module I have, when used together with the Adafruit ST7735 library, is showing black-blue-green-red instead..
#include <Adafruit_GFX.h> // Core graphics library
#include <Adafruit_ST7735.h> // Hardware-specific library for ST7735
//#include <Adafruit_ST7789.h> // Hardware-specific library for ST7789
#include <SPI.h>
#if defined(ARDUINO_FEATHER_ESP32) // Feather Huzzah32
#define TFT_CS 14
#define TFT_RST 15
#define TFT_DC 32
#elif defined(ESP8266)
#define TFT_CS 4
#define TFT_RST 16
#define TFT_DC 5
#else
// For the breakout board, you can use any 2 or 3 pins.
// These pins will also work for the 1.8" TFT shield.
#define TFT_CS 10
#define TFT_RST 9 // Or set to -1 and connect to Arduino RESET pin
#define TFT_DC 8
#endif
// OPTION 1 (recommended) is to use the HARDWARE SPI pins, which are unique
// to each board and not reassignable. For Arduino Uno: MOSI = pin 11 and
// SCLK = pin 13. This is the fastest mode of operation and is required if
// using the breakout board's microSD card.
// For 1.44" and 1.8" TFT with ST7735 use:
Adafruit_ST7735 tft = Adafruit_ST7735(TFT_CS, TFT_DC, TFT_RST);
// For 1.14", 1.3", 1.54", 1.69", and 2.0" TFT with ST7789:
//Adafruit_ST7789 tft = Adafruit_ST7789(TFT_CS, TFT_DC, TFT_RST);
// OPTION 2 lets you interface the display using ANY TWO or THREE PINS,
// tradeoff being that performance is not as fast as hardware SPI above.
//#define TFT_MOSI 11 // Data out
//#define TFT_SCLK 13 // Clock out
// For ST7735-based displays, we will use this call
//Adafruit_ST7735 tft = Adafruit_ST7735(TFT_CS, TFT_DC, TFT_MOSI, TFT_SCLK, TFT_RST);
// OR for the ST7789-based displays, we will use this call
//Adafruit_ST7789 tft = Adafruit_ST7789(TFT_CS, TFT_DC, TFT_MOSI, TFT_SCLK, TFT_RST);
float p = 3.1415926;
void setup(void) {
Serial.begin(9600);
// Serial.print(F("Hello! ST77xx TFT Test"));
// Use this initializer if using a 1.8" TFT screen:
// tft.initR(INITR_BLACKTAB); // Init ST7735S chip, black tab
// OR use this initializer if using a 1.8" TFT screen with offset such as WaveShare:
// tft.initR(INITR_GREENTAB); // Init ST7735S chip, green tab
// OR use this initializer (uncomment) if using a 1.44" TFT:
// tft.initR(INITR_144GREENTAB); // Init ST7735R chip, green tab
// OR use this initializer (uncomment) if using a 0.96" 160x80 TFT:
tft.initR(INITR_MINI160x80); // Init ST7735S mini display
// OR use this initializer (uncomment) if using a 1.3" or 1.54" 240x240 TFT:
// tft.init(240, 240); // Init ST7789 240x240
// OR use this initializer (uncomment) if using a 1.69" 280x240 TFT:
// tft.init(240, 280); // Init ST7789 280x240
// OR use this initializer (uncomment) if using a 2.0" 320x240 TFT:
// tft.init(240, 320); // Init ST7789 320x240
// OR use this initializer (uncomment) if using a 1.14" 240x135 TFT:
// tft.init(135, 240); // Init ST7789 240x135
// SPI speed defaults to SPI_DEFAULT_FREQ defined in the library, you can override it here
// Note that speed allowable depends on chip and quality of wiring, if you go too fast, you
// may end up with a black screen some times, or all the time.
// tft.setSPISpeed(40000000);
}
void loop() {
tft.fillScreen(ST77XX_BLACK);
delay(1000);
tft.fillScreen(ST77XX_RED);
delay(1000);
tft.fillScreen(ST77XX_GREEN);
delay(1000);
tft.fillScreen(ST77XX_BLUE);
delay(1000);
}
/*
void testlines(uint16_t color) {
tft.fillScreen(ST77XX_BLACK);
for (int16_t x=0; x < tft.width(); x+=6) {
tft.drawLine(0, 0, x, tft.height()-1, color);
delay(0);
}
for (int16_t y=0; y < tft.height(); y+=6) {
tft.drawLine(0, 0, tft.width()-1, y, color);
delay(0);
}
tft.fillScreen(ST77XX_BLACK);
for (int16_t x=0; x < tft.width(); x+=6) {
tft.drawLine(tft.width()-1, 0, x, tft.height()-1, color);
delay(0);
}
for (int16_t y=0; y < tft.height(); y+=6) {
tft.drawLine(tft.width()-1, 0, 0, y, color);
delay(0);
}
tft.fillScreen(ST77XX_BLACK);
for (int16_t x=0; x < tft.width(); x+=6) {
tft.drawLine(0, tft.height()-1, x, 0, color);
delay(0);
}
for (int16_t y=0; y < tft.height(); y+=6) {
tft.drawLine(0, tft.height()-1, tft.width()-1, y, color);
delay(0);
}
tft.fillScreen(ST77XX_BLACK);
for (int16_t x=0; x < tft.width(); x+=6) {
tft.drawLine(tft.width()-1, tft.height()-1, x, 0, color);
delay(0);
}
for (int16_t y=0; y < tft.height(); y+=6) {
tft.drawLine(tft.width()-1, tft.height()-1, 0, y, color);
delay(0);
}
}
void testdrawtext(char *text, uint16_t color) {
tft.setCursor(0, 0);
tft.setTextColor(color);
tft.setTextWrap(true);
tft.print(text);
}
void testfastlines(uint16_t color1, uint16_t color2) {
tft.fillScreen(ST77XX_BLACK);
for (int16_t y=0; y < tft.height(); y+=5) {
tft.drawFastHLine(0, y, tft.width(), color1);
}
for (int16_t x=0; x < tft.width(); x+=5) {
tft.drawFastVLine(x, 0, tft.height(), color2);
}
}
void testdrawrects(uint16_t color) {
tft.fillScreen(ST77XX_BLACK);
for (int16_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(ST77XX_BLACK);
for (int16_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 (int16_t x=radius; x < tft.width(); x+=radius*2) {
for (int16_t y=radius; y < tft.height(); y+=radius*2) {
tft.fillCircle(x, y, radius, color);
}
}
}
void testdrawcircles(uint8_t radius, uint16_t color) {
for (int16_t x=0; x < tft.width()+radius; x+=radius*2) {
for (int16_t y=0; y < tft.height()+radius; y+=radius*2) {
tft.drawCircle(x, y, radius, color);
}
}
}
void testtriangles() {
tft.fillScreen(ST77XX_BLACK);
uint16_t color = 0xF800;
int t;
int w = tft.width()/2;
int x = tft.height()-1;
int y = 0;
int z = tft.width();
for(t = 0 ; t <= 15; t++) {
tft.drawTriangle(w, y, y, x, z, x, color);
x-=4;
y+=4;
z-=4;
color+=100;
}
}
void testroundrects() {
tft.fillScreen(ST77XX_BLACK);
uint16_t color = 100;
int i;
int t;
for(t = 0 ; t <= 4; t+=1) {
int x = 0;
int y = 0;
int w = tft.width()-2;
int h = tft.height()-2;
for(i = 0 ; i <= 16; i+=1) {
tft.drawRoundRect(x, y, w, h, 5, color);
x+=2;
y+=3;
w-=4;
h-=6;
color+=1100;
}
color+=100;
}
}
void tftPrintTest() {
tft.setTextWrap(false);
tft.fillScreen(ST77XX_BLACK);
tft.setCursor(0, 30);
tft.setTextColor(ST77XX_RED);
tft.setTextSize(1);
tft.println("Hello World!");
tft.setTextColor(ST77XX_YELLOW);
tft.setTextSize(2);
tft.println("Hello World!");
tft.setTextColor(ST77XX_GREEN);
tft.setTextSize(3);
tft.println("Hello World!");
tft.setTextColor(ST77XX_BLUE);
tft.setTextSize(4);
tft.print(1234.567);
delay(1500);
tft.setCursor(0, 0);
tft.fillScreen(ST77XX_BLACK);
tft.setTextColor(ST77XX_WHITE);
tft.setTextSize(0);
tft.println("Hello World!");
tft.setTextSize(1);
tft.setTextColor(ST77XX_GREEN);
tft.print(p, 6);
tft.println(" Want pi?");
tft.println(" ");
tft.print(8675309, HEX); // print 8,675,309 out in HEX!
tft.println(" Print HEX!");
tft.println(" ");
tft.setTextColor(ST77XX_WHITE);
tft.println("Sketch has been");
tft.println("running for: ");
tft.setTextColor(ST77XX_MAGENTA);
tft.print(millis() / 1000);
tft.setTextColor(ST77XX_WHITE);
tft.print(" seconds.");
}
void mediabuttons() {
// play
tft.fillScreen(ST77XX_BLACK);
tft.fillRoundRect(25, 10, 78, 60, 8, ST77XX_WHITE);
tft.fillTriangle(42, 20, 42, 60, 90, 40, ST77XX_RED);
delay(500);
// pause
tft.fillRoundRect(25, 90, 78, 60, 8, ST77XX_WHITE);
tft.fillRoundRect(39, 98, 20, 45, 5, ST77XX_GREEN);
tft.fillRoundRect(69, 98, 20, 45, 5, ST77XX_GREEN);
delay(500);
// play color
tft.fillTriangle(42, 20, 42, 60, 90, 40, ST77XX_BLUE);
delay(50);
// pause color
tft.fillRoundRect(39, 98, 20, 45, 5, ST77XX_RED);
tft.fillRoundRect(69, 98, 20, 45, 5, ST77XX_RED);
// play color
tft.fillTriangle(42, 20, 42, 60, 90, 40, ST77XX_GREEN);
}
*/Let me try rotating the image
no luck, seems like it isnt something to do with rotation
Portrait
https://ibb.co/rpSkhdg
Landscape
https://ibb.co/5RvQDZF
Please edit your post and put the code in code tags to make it compatible with the forum software and posting guidelines.
Please post a link to the actual display that you have bought.
I suspect that it has a GalaxyCore GC9106 controller and not the Sitronics ST7735S that might be printed on the pcb.
Life would be so much simpler if people just posted links to their hardware.
Displays vary. Some vendors lie. Some vendors are just ignorant. But if we can see the actual pcb we can generally identify the display.
David.
@aarg
Sorry about that, this is my first time using the forum. Just fixed it
Hi @david_prentice
Do you mean the link to the vendor’s page?
This is where I purchased my display. The one that says "Color: 0.96 TFT Black board"
photos of the actual display
https://ibb.co/VjNJBBJ
https://ibb.co/v3Sp06g
Thanks for the vendor link.
I had never seen a "Black" 0.96 inch board before.
My GC9106 boards look exactly the same as the "Blue 0.96" in your link.
And I can't see any difference in pcb tracks, components, printing, ... between the Black 0.96 and the Blue 0.96.
I will put a library on GitHub probably later today.
I will include a diagnostic sketch that should detect whether the controller is GC9106 or ST7735S. Note that all makes of TFT controller are 3.3V.
I have never seen a TFT controller datasheet that specifies 5V tolerance. But in practice the Sitronics controllers appear to be 5V tolerant.
David.
Thank you. I look forward to trying out the library you will upload.
You can try https://github.com/prenticedavid/Adafruit_GC9102_kbv
This library is not ready for public Release yet. Please offer some feedback.
Run the GC9106_rotation.ino example
If you have 3.3V logic you can run the ST7789_readreg_diag.ino example. Please copy-paste the output to your message.
David.
1 Like
Thank you very much for your help. Here are the testing results:
Wiring
Serial output from "ST7789_readreg_diag.ino"
- select correct defines for your board wiring
- select correct interface type
- select appropriate report function
certain registers read first byte e.g. 0x00-0x0F, 0xDA-0xDC
other multi-argument registers read first byte as dummy
Bi-directional Read registers SDA (+ DC)
read reg(4): ID = 0x9104
controller
data sheet specific calls
controller reg(0x04) = 0x009104
controller reg(0x09) = 0x00610000
controller reg(0x0A) = 0x08
controller reg(0x0B) = 0x00
controller reg(0x0C) = 0x06
controller reg(0x0D) = 0x00
controller reg(0x0E) = 0x00
controller reg(0x0F) = 0xF0
controller reg(0xDA) = 0x00
controller reg(0xDB) = 0x91
controller reg(0xDC) = 0x04
Results of "GC9106_rotation.ino"
"GC9106_rotation.ino" seems to work perfectly.
Once again, thank you.
1 Like
Thank you very much, that was also the solution to my similar problem.
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