Hello everyone, I have a st7789 screen. I've tried this many times but all I see on the screen is light and black burning in the background. But when I used the benchmark in the FastST7789 library, there was a response on the screen, but it is not obvious at all, but when I press the reset button, the screen becomes visible for a moment. What's the problem?
St7789 is the driver chip on your display. No-one knows the actual circuit of your display with this information. Neither how is your wiring.
gnd-gnd
vcc-3.3v
sck-d13
sda-d11
res-d8
dc-d7
portakal_tr, welcome to the form!
Consider that we cannot see your setup or the code you are using (since you haven't posted it). Thank you for posting the connection details, but without knowing which board, we cannot referencing what the functions of those pins are.
It may be helpful to start by reading the pinned post re 'How to get the best from the forum'.
The when you have read that you will understand why it is of immense help to those trying to assist when you post details such as the exact board you are using, the exact display you are using (there are many based on the ST7789) and the code you are running, making sure to enclose it in CODE tags.
Sorry, I didn't know because I'm new.
// ST7789 library example
// (c) 2019-20 Pawel A. Hernik
/*
ST7789 240x240 IPS (without CS pin) connections (only 6 wires required):
#01 GND -> GND
#02 VCC -> VCC (3.3V only!)
#03 SCL -> D13/SCK
#04 SDA -> D11/MOSI
#05 RES -> D8 or any digital
#06 DC -> D7 or any digital
#07 BLK -> NC
*/
#define SCR_WD 240
#define SCR_HT 240
#include <SPI.h>
#include <Adafruit_GFX.h>
#if (__STM32F1__) // bluepill
#define TFT_DC PA1
#define TFT_RST PA0
//#include <Arduino_ST7789_STM.h>
#else
#define TFT_DC 7
#define TFT_RST 8
#include <Arduino_ST7789_Fast.h>
//#include <Arduino_ST7789.h>
#endif
Arduino_ST7789 tft = Arduino_ST7789(TFT_DC, TFT_RST);
// ------------------------------------------------
unsigned long FillScreenTest()
{
unsigned long start = millis();
for(int i=0;i<5;i++) {
tft.fillScreen(RED);
tft.fillScreen(GREEN);
tft.fillScreen(BLUE);
tft.fillScreen(YELLOW);
}
return millis()-start;
}
// ------------------------------------------------
unsigned long ClearScreenTest()
{
unsigned long start = millis();
for(int i=0;i<5*4;i++)
tft.fillScreen(BLACK);
return millis()-start;
}
// ------------------------------------------------
const uint16_t imgF[] PROGMEM = {0xF800,0xF840,0xF8A0,0xF900,0xF960,0xF9C0,0xFA20,0xFA80,0xFAE0,0xFB40,0xFBA0,0xFC00,0xFC60,0xFCC0,0xFD20,0xFD80,0xFDE0,0xFE40,0xFEA0,0xFF00,0xFF60,0xFFC0,0xFFE0,0xEFE0,0xE7E0,0xD7E0,0xCFE0,0xBFE0,0xB7E0,0xA7E0,0x9FE0,0x8FE0,0x87E0,0x77E0,0x6FE0,0x5FE0,0x57E0,0x47E0,0x3FE0,0x2FE0,0x27E0,0x17E0,0xFE0,0x7E0,0x7E1,0x7E3,0x7E4,0x7E6,0x7E7,0x7E9,0x7EA,0x7EC,0x7ED,0x7EF,0x7F0,0x7F2,0x7F3,0x7F5,0x7F6,0x7F8,0x7F9,0x7FB,0x7FC,0x7FE,0x7FF,0x79F,0x73F,0x6DF,0x67F,0x61F,0x5BF,0x55F,0x4FF,0x49F,0x43F,0x3DF,0x37F,0x31F,0x2BF,0x25F,0x1FF,0x19F,0x13F,0xDF,0x7F,0x1F,0x81F,0x101F,0x201F,0x281F,0x381F,0x401F,0x501F,0x581F,0x681F,0x701F,0x801F,0x881F,0x981F,0xA01F,0xB01F,0xB81F,0xC81F,0xD01F,0xE01F,0xE81F,0xF81F,0xF81F,0xF81D,0xF81C,0xF81A,0xF819,0xF817,0xF816,0xF814,0xF813,0xF811,0xF810,0xF80E,0xF80D,0xF80B,0xF80A,0xF808,0xF807,0xF805,0xF804,0xF802,0xF801,
0xF800,0xF840,0xF8A0,0xF900,0xF960,0xF9C0,0xFA20,0xFA80,0xFAE0,0xFB40,0xFBA0,0xFC00,0xFC60,0xFCC0,0xFD20,0xFD80,0xFDE0,0xFE40,0xFEA0,0xFF00,0xFF60,0xFFC0,0xFFE0,0xEFE0,0xE7E0,0xD7E0,0xCFE0,0xBFE0,0xB7E0,0xA7E0,0x9FE0,0x8FE0,0x87E0,0x77E0,0x6FE0,0x5FE0,0x57E0,0x47E0,0x3FE0,0x2FE0,0x27E0,0x17E0,0xFE0,0x7E0,0x7E1,0x7E3,0x7E4,0x7E6,0x7E7,0x7E9,0x7EA,0x7EC,0x7ED,0x7EF,0x7F0,0x7F2,0x7F3,0x7F5,0x7F6,0x7F8,0x7F9,0x7FB,0x7FC,0x7FE,0x7FF,0x79F,0x73F,0x6DF,0x67F,0x61F,0x5BF,0x55F,0x4FF,0x49F,0x43F,0x3DF,0x37F,0x31F,0x2BF,0x25F,0x1FF,0x19F,0x13F,0xDF,0x7F,0x1F,0x81F,0x101F,0x201F,0x281F,0x381F,0x401F,0x501F,0x581F,0x681F,0x701F,0x801F,0x881F,0x981F,0xA01F,0xB01F,0xB81F,0xC81F,0xD01F,0xE01F,0xE81F,0xF81F,0xF81F,0xF81D,0xF81C,0xF81A,0xF819,0xF817,0xF816,0xF814,0xF813,0xF811,0xF810,0xF80E,0xF80D,0xF80B,0xF80A,0xF808,0xF807,0xF805,0xF804,0xF802,0xF801};
uint16_t img[SCR_WD+16];
unsigned long DrawImageTest()
{
for(int i=0;i<SCR_WD+16;i++) img[i] = tft.rgbWheel(500L*i/SCR_WD);
unsigned long start = millis();
for(int i=0;i<5*4;i++) for(int y=0;y<SCR_HT;y++) tft.drawImage(0,y,SCR_WD,1,img+(((y>>2)+i)&0xf));
return millis()-start;
}
// ------------------------------------------------
unsigned long DrawImageFTest()
{
unsigned long start = millis();
for(int i=0;i<5*4;i++) for(int y=0;y<SCR_HT;y++) tft.drawImageF(0,y,SCR_WD,1,imgF+(((y>>2)+i)&0xf));
return millis()-start;
}
// ------------------------------------------------
// original Adafruit
unsigned long orig[14]={ 5872, 5872, 1468292,394696,2938532,132952,121996,4068208,925276,1319512, 1278096,1930524,602080,4649200 };
// pre 18.09.2020 Fast
//unsigned long orig[14]={2645,3577,661616,114064,579036,56216,49500,1830864,222936,259340,175460,903348,138264,1853300};
unsigned long res[14];
void result(int i)
{
Serial.print(res[i]);
if(res[i]<1000000) Serial.print("\t");
Serial.print("\t\t\t");
Serial.print(100*orig[i]/res[i]);
Serial.println("%");
}
void setup(void)
{
Serial.begin(9600);
Serial.println(F("IPS 240x240 ST7789"));
//tft.reset();
//tft.init(SCR_WD, SCR_HT);
tft.begin();
tft.fillScreen(BLACK);
tft.setCursor(0, 0);
tft.setTextColor(WHITE); tft.setTextSize(2);
tft.println("IPS 240x240 ST7789");
tft.println("Library Benchmark");
tft.println("starts in 3s ...");
delay(3000);
Serial.println(F("Benchmark Time (microseconds)"));
res[0]=FillScreenTest();
Serial.print(F("FillScreen Mbps "));
Serial.println(String(res[0])+"ms "+String(1000*20.0/res[0])+"fps "+String(20.0*SCR_WD*SCR_HT*16/res[0]/1000.0)+" Mbps\t"+100*orig[0]/res[0]+"%");
//for(int i=0;i<100;i++) tft.fillRect(i,i,SCR_WD-i*2,SCR_HT-i*2,tft.rgbWheel(i*10)); delay(1000);
res[1]=ClearScreenTest();
Serial.print(F("ClearScreen Mbps "));
Serial.println(String(res[1])+"ms "+String(1000*20.0/res[1])+"fps "+String(20.0*SCR_WD*SCR_HT*16/res[1]/1000.0)+" Mbps\t"+100*orig[1]/res[1]+"%");
res[1]=DrawImageTest();
Serial.print(F("DrawImage Mbps "));
Serial.println(String(res[1])+"ms "+String(1000*20.0/res[1])+"fps "+String(20.0*SCR_WD*SCR_HT*16/res[1]/1000.0)+" Mbps\t"+100*orig[1]/res[1]+"%");
res[1]=DrawImageFTest();
Serial.print(F("DrawImageF Mbps "));
Serial.println(String(res[1])+"ms "+String(1000*20.0/res[1])+"fps "+String(20.0*SCR_WD*SCR_HT*16/res[1]/1000.0)+" Mbps\t"+100*orig[1]/res[1]+"%");
res[2]=testFillScreen();
Serial.print(F("Screen fill "));
result(2);
delay(500);
res[3]=testText();
Serial.print(F("Text "));
result(3);
delay(3000);
res[4]=testLines(CYAN);
Serial.print(F("Lines "));
result(4);
delay(500);
res[5]=testFastLines(RED, BLUE);
Serial.print(F("Horiz/Vert Lines "));
result(5);
delay(500);
res[6]=testRects(GREEN);
Serial.print(F("Rectangles (outline) "));
result(6);
delay(500);
res[7]=testFilledRects(YELLOW, MAGENTA);
Serial.print(F("Rectangles (filled) "));
result(7);
delay(500);
res[8]=testFilledCircles(10, MAGENTA);
Serial.print(F("Circles (filled) "));
result(8);
res[9]=testCircles(10, WHITE);
Serial.print(F("Circles (outline) "));
result(9);
delay(500);
res[10]=testTriangles();
Serial.print(F("Triangles (outline) "));
result(10);
delay(500);
res[11]=testFilledTriangles();
Serial.print(F("Triangles (filled) "));
result(11);
delay(500);
res[12]=testRoundRects();
Serial.print(F("Rounded rects (outline) "));
result(12);
delay(500);
res[13]=testFilledRoundRects();
Serial.print(F("Rounded rects (filled) "));
result(13);
delay(500);
Serial.println(F("Done!"));
Serial.println(F("Results:"));
for(int i=0;i<14;i++) { Serial.print(res[i]); Serial.print(","); }
Serial.println();
int c1=YELLOW, c2=WHITE;
tft.fillScreen(BLACK);
tft.setCursor(0, 0);
tft.setTextSize(2);
tft.setTextColor(CYAN);
tft.println("RESULTS:");
tft.setTextSize(1);
tft.println();
tft.setTextColor(GREEN);
tft.println(F("Benchmark Time (us)"));
tft.setTextColor(c1); tft.print(F("FillScreen Mbps "));
tft.setTextColor(c2); tft.println(String(res[0])+"ms "+String(20.0*SCR_WD*SCR_HT*16/res[0]/1000.0)+" Mbps");
//tft.setTextColor(c1); tft.print(F("ClearScreen Mbps "));
//tft.setTextColor(c2); tft.print(String(res[1])+"ms "+String(20.0*SCR_WD*SCR_HT*16/res[1]/1000.0)+" Mbps");
tft.setTextColor(c1); tft.print(F("DrawImageF Mbps "));
tft.setTextColor(c2); tft.println(String(res[1])+"ms "+String(20.0*SCR_WD*SCR_HT*16/res[1]/1000.0)+" Mbps");
tft.setTextColor(c1); tft.print(F("Screen fill "));
tft.setTextColor(c2); tft.println(res[3]);
tft.setTextColor(c1); tft.print(F("Text "));
tft.setTextColor(c2); tft.println(res[4]);
tft.setTextColor(c1); tft.print(F("Lines "));
tft.setTextColor(c2); tft.println(res[5]);
tft.setTextColor(c1); tft.print(F("Horiz/Vert Lines "));
tft.setTextColor(c2); tft.println(res[6]);
tft.setTextColor(c1); tft.print(F("Rectangles (outline) "));
tft.setTextColor(c2); tft.println(res[8]);
tft.setTextColor(c1); tft.print(F("Rectangles (filled) "));
tft.setTextColor(c2); tft.println(res[9]);
tft.setTextColor(c1); tft.print(F("Circles (filled) "));
tft.setTextColor(c2); tft.println(res[10]);
tft.setTextColor(c1); tft.print(F("Circles (outline) "));
tft.setTextColor(c2); tft.println(res[11]);
tft.setTextColor(c1); tft.print(F("Triangles (outline) "));
tft.setTextColor(c2); tft.println(res[12]);
tft.setTextColor(c1); tft.print(F("Triangles (filled) "));
tft.setTextColor(c2); tft.println(res[13]);
tft.setTextColor(c1); tft.print(F("Rounded rects (outline) "));
tft.setTextColor(c2); tft.println(res[14]);
tft.setTextColor(c1); tft.print(F("Rounded rects (filled) "));
tft.setTextColor(c2); tft.println(res[15]);
tft.setTextColor(RED); tft.println(F("Done!"));
}
/*
Optimizations from 18.9.2020
-- IPS 240x240 ST7789, back to old setAddrWindow() with writeSPI, flash: 28,550
Benchmark Time (microseconds)
FillScreen Mbps 2609ms 7.67fps 7.06 Mbps 225%
ClearScreen Mbps 2609ms 7.67fps 7.06 Mbps 225%
DrawImage Mbps 2740ms 7.30fps 6.73 Mbps 214%
DrawImageF Mbps 3579ms 5.59fps 5.15 Mbps 164%
Screen fill 652528 225%
Text 109748 359%
Lines 572992 512%
Horiz/Vert Lines 54696 243%
Rectangles (outline) 47916 254%
Rectangles (filled) 1805552 225%
Circles (filled) 208212 444%
Circles (outline) 255744 515%
Triangles (outline) 173468 736%
Triangles (filled) 880160 219%
Rounded rects (outline) 135920 442%
Rounded rects (filled) 1819660 255%
Done!
Results:
2609,3579,652528,109748,572992,54696,47916,1805552,208212,255744,173468,880160,135920,1819660,
-- IPS 240x240 ST7789 + back to old drawPixel, flash: 28,456
Benchmark Time (microseconds)
FillScreen Mbps 2609ms 7.67fps 7.06 Mbps 225%
ClearScreen Mbps 2609ms 7.67fps 7.06 Mbps 225%
DrawImage Mbps 2750ms 7.27fps 6.70 Mbps 213%
DrawImageF Mbps 3588ms 5.57fps 5.14 Mbps 163%
Screen fill 652540 225%
Text 114004 346%
Lines 609216 482%
Horiz/Vert Lines 54884 242%
Rectangles (outline) 48216 253%
Rectangles (filled) 1805640 225%
Circles (filled) 213896 432%
Circles (outline) 272036 485%
Triangles (outline) 184020 694%
Triangles (filled) 885728 217%
Rounded rects (outline) 142432 422%
Rounded rects (filled) 1821976 255%
Done!
Results:
2609,3588,652540,114004,609216,54884,48216,1805640,213896,272036,184020,885728,142432,1821976,
-- IPS 240x240 ST7789 - all previous + no _x/ystart in setAddrWindow(), flash: 28,462
Benchmark Time (microseconds)
FillScreen Mbps 2609ms 7.67fps 7.06 Mbps 225%
ClearScreen Mbps 2609ms 7.67fps 7.06 Mbps 225%
DrawImage Mbps 2749ms 7.28fps 6.70 Mbps 213%
DrawImageF Mbps 3588ms 5.57fps 5.14 Mbps 163%
Screen fill 652536 225%
Text 115248 342%
Lines 622492 472%
Horiz/Vert Lines 54876 242%
Rectangles (outline) 48216 253%
Rectangles (filled) 1805608 225%
Circles (filled) 213896 432%
Circles (outline) 278020 474%
Triangles (outline) 187872 680%
Triangles (filled) 885744 217%
Rounded rects (outline) 144708 416%
Rounded rects (filled) 1821980 255%
Done!
Results:
2609,3588,652536,115248,622492,54876,48216,1805608,213896,278020,187872,885744,144708,1821980,
-- IPS 240x240 ST7789 optimized write and copy, flash 28,506
Benchmark Time (microseconds)
FillScreen Mbps 2609ms 7.67fps 7.06 Mbps 225%
ClearScreen Mbps 2608ms 7.67fps 7.07 Mbps 225%
DrawImage Mbps 2751ms 7.27fps 6.70 Mbps 213%
DrawImageF Mbps 3592ms 5.57fps 5.13 Mbps 163%
Screen fill 652552 225%
Text 117240 336% (---)
Lines 639400 459% (---)
Horiz/Vert Lines 54968 241%
Rectangles (outline) 48364 252%
Rectangles (filled) 1805680 225%
Circles (filled) 216544 427%
Circles (outline) 285624 461%
Triangles (outline) 192788 662%
Triangles (filled) 888328 217%
Rounded rects (outline) 147748 407% (---)
Rounded rects (filled) 1823064 255%
Done!
Results:
2609,3592,652552,117240,639400,54968,48364,1805680,216544,285624,192788,888328,147748,1823064,
-- IPS 240x240 ST7789 Fast original before 18.9.20 changes, flash: 29,356 bytes
Benchmark Time (microseconds)
FillScreen Mbps 2645ms 7.56fps 6.97 Mbps 222%
ClearScreen Mbps 2645ms 7.56fps 6.97 Mbps 222%
DrawImage Mbps 3026ms 6.61fps 6.09 Mbps 194%
DrawImageF Mbps 3577ms 5.59fps 5.15 Mbps 164%
Screen fill 661616 221%
Text 114064 346%
Lines 579036 507%
Horiz/Vert Lines 56216 236%
Rectangles (outline) 49500 246%
Rectangles (filled) 1830864 222%
Circles (filled) 222936 415%
Circles (outline) 259340 508%
Triangles (outline) 175460 728%
Triangles (filled) 903348 213%
Rounded rects (outline) 138264 435%
Rounded rects (filled) 1853300 250%
Done!
Results:
2645,3577,661616,114064,579036,56216,49500,1830864,222936,259340,175460,903348,138264,1853300,
-- IPS 240x240 ST7789 in COMPATIBILITY mode
Benchmark Time (microseconds)
FillScreen Mbps 5361ms 3.73fps 3.44 Mbps 109%
ClearScreen Mbps 5362ms 3.73fps 3.44 Mbps 109%
DrawImage Mbps 5665ms 3.53fps 3.25 Mbps 103%
DrawImageF Mbps 5706ms 3.51fps 3.23 Mbps 102%
Screen fill 1340716 109%
Text 244268 161%
Lines 1652188 177%
Horiz/Vert Lines 114840 115%
Rectangles (outline) 101892 119%
Rectangles (filled) 3711592 109%
Circles (filled) 487852 189%
Circles (outline) 741392 177%
Triangles (outline) 494348 258%
Triangles (filled) 1614292 119%
Rounded rects (outline) 363292 165%
Rounded rects (filled) 3761392 123%
Done!
Results:
5361,5706,1340716,244268,1652188,114840,101892,3711592,487852,741392,494348,1614292,363292,3761392,
*/
/*
IPS ST7789 original:
Benchmark Time (microseconds)
FillScreen 5872ms 3.41fps
ClearScreen 5872ms 3.41fps
Screen fill 1468292
Text 394696
Lines 2938532
Horiz/Vert Lines 132952
Rectangles (outline) 121996
Rectangles (filled) 4068208
Circles (filled) 925276
Circles (outline) 1319512
Triangles (outline) 1278096
Triangles (filled) 1930524
Rounded rects (outline) 602080
Rounded rects (filled) 4649200
Done!
IPS 240x240 ST7789 optimized - FINAL
Benchmark Time (microseconds)
FillScreen 2645ms 7.56fps
ClearScreen 2645ms 7.56fps
Screen fill 661488
Text 108816
Lines 563888
Horiz/Vert Lines 56192
Rectangles (outline) 49128
Rectangles (filled) 1830804
Circles (filled) 270728
Circles (outline) 250940
Triangles (outline) 245104
Triangles (filled) 897880
Rounded rects (outline) 135416
Rounded rects (filled) 2030816
Done!
Fill speed:
240*240*2 = 115 200b *20 *8bit/2.645 ->6.9Mbps (!)
IPS 240x240 ST7789
Benchmark Time (microseconds)
FillScreen Mbps 2645ms 7.56fps 6.97 Mbps 222%
ClearScreen Mbps 2645ms 7.56fps 6.97 Mbps 222%
Screen fill 661624 221%
Text 109496 360%
Lines 563888 521%
Horiz/Vert Lines 56216 236%
Rectangles (outline) 49168 248%
Rectangles (filled) 1830880 222%
Circles (filled) 271772 340%
Circles (outline) 251000 525%
Triangles (outline) 245104 521%
Triangles (filled) 898632 214%
Rounded rects (outline) 135368 444%
Rounded rects (filled) 2031308 228%
Done!
*/
// ------------------------------------------------
void loop(void)
{
}
// ------------------------------------------------
unsigned long testFillScreen() {
unsigned long start = micros();
tft.fillScreen(BLACK);
tft.fillScreen(RED);
tft.fillScreen(GREEN);
tft.fillScreen(BLUE);
tft.fillScreen(BLACK);
return micros() - start;
}
// ------------------------------------------------
unsigned long testText() {
tft.fillScreen(BLACK);
unsigned long start = micros();
tft.setCursor(0, 0);
tft.setTextColor(WHITE); tft.setTextSize(1);
tft.println("Hello World!");
tft.setTextColor(YELLOW); tft.setTextSize(2);
tft.println(1234.56);
tft.setTextColor(RED); tft.setTextSize(3);
tft.println(0xDEADBEEF, HEX);
tft.println();
tft.setTextColor(GREEN);
tft.setTextSize(5);
tft.println("Groop");
tft.setTextSize(2);
tft.println("I implore thee,");
tft.setTextSize(1);
tft.println("my foonting turlingdromes.");
tft.println("And hooptiously drangle me");
tft.println("with crinkly bindlewurdles,");
tft.println("Or I will rend thee");
tft.println("in the gobberwarts");
tft.println("with my blurglecruncheon,");
tft.println("see if I don't!");
return micros() - start;
}
// ------------------------------------------------
unsigned long testLines(uint16_t color) {
unsigned long start, t;
int x1, y1, x2, y2,
w = tft.width(),
h = tft.height();
tft.fillScreen(BLACK);
x1 = y1 = 0;
y2 = h - 1;
start = micros();
for(x2=0; x2<w; x2+=6) tft.drawLine(x1, y1, x2, y2, color);
x2 = w - 1;
for(y2=0; y2<h; y2+=6) tft.drawLine(x1, y1, x2, y2, color);
t = micros() - start; // fillScreen doesn't count against timing
tft.fillScreen(BLACK);
x1 = w - 1;
y1 = 0;
y2 = h - 1;
start = micros();
for(x2=0; x2<w; x2+=6) tft.drawLine(x1, y1, x2, y2, color);
x2 = 0;
for(y2=0; y2<h; y2+=6) tft.drawLine(x1, y1, x2, y2, color);
t += micros() - start;
tft.fillScreen(BLACK);
x1 = 0;
y1 = h - 1;
y2 = 0;
start = micros();
for(x2=0; x2<w; x2+=6) tft.drawLine(x1, y1, x2, y2, color);
x2 = w - 1;
for(y2=0; y2<h; y2+=6) tft.drawLine(x1, y1, x2, y2, color);
t += micros() - start;
tft.fillScreen(BLACK);
x1 = w - 1;
y1 = h - 1;
y2 = 0;
start = micros();
for(x2=0; x2<w; x2+=6) tft.drawLine(x1, y1, x2, y2, color);
x2 = 0;
for(y2=0; y2<h; y2+=6) tft.drawLine(x1, y1, x2, y2, color);
return micros() - start;
}
// ------------------------------------------------
unsigned long testFastLines(uint16_t color1, uint16_t color2) {
unsigned long start;
int x, y, w = tft.width(), h = tft.height();
tft.fillScreen(BLACK);
start = micros();
for(y=0; y<h; y+=5) tft.drawFastHLine(0, y, w, color1);
for(x=0; x<w; x+=5) tft.drawFastVLine(x, 0, h, color2);
return micros() - start;
}
// ------------------------------------------------
unsigned long testRects(uint16_t color) {
unsigned long start;
int n, i, i2,
cx = tft.width() / 2,
cy = tft.height() / 2;
tft.fillScreen(BLACK);
n = min(tft.width(), tft.height());
start = micros();
for(i=2; i<n; i+=6) {
i2 = i / 2;
tft.drawRect(cx-i2, cy-i2, i, i, color);
}
return micros() - start;
}
// ------------------------------------------------
unsigned long testFilledRects(uint16_t color1, uint16_t color2) {
unsigned long start, t = 0;
int n, i, i2,
cx = tft.width() / 2 - 1,
cy = tft.height() / 2 - 1;
tft.fillScreen(BLACK);
n = min(tft.width(), tft.height());
for(i=n; i>0; i-=6) {
i2 = i / 2;
start = micros();
tft.fillRect(cx-i2, cy-i2, i, i, color1);
t += micros() - start;
// Outlines are not included in timing results
tft.drawRect(cx-i2, cy-i2, i, i, color2);
}
return t;
}
// ------------------------------------------------
unsigned long testFilledCircles(uint8_t radius, uint16_t color) {
unsigned long start;
int x, y, w = tft.width(), h = tft.height(), r2 = radius * 2;
tft.fillScreen(BLACK);
start = micros();
for(x=radius; x<w; x+=r2) {
for(y=radius; y<h; y+=r2) {
tft.fillCircle(x, y, radius, color);
}
}
return micros() - start;
}
// ------------------------------------------------
unsigned long testCircles(uint8_t radius, uint16_t color) {
unsigned long start;
int x, y, r2 = radius * 2,
w = tft.width() + radius,
h = tft.height() + radius;
// Screen is not cleared for this one -- this is
// intentional and does not affect the reported time.
start = micros();
for(x=0; x<w; x+=r2) {
for(y=0; y<h; y+=r2) {
tft.drawCircle(x, y, radius, color);
}
}
return micros() - start;
}
// ------------------------------------------------
unsigned long testTriangles() {
unsigned long start;
int n, i, cx = tft.width() / 2 - 1,
cy = tft.height() / 2 - 1;
tft.fillScreen(BLACK);
n = min(cx, cy);
start = micros();
for(i=0; i<n; i+=5) {
tft.drawTriangle(
cx , cy - i, // peak
cx - i, cy + i, // bottom left
cx + i, cy + i, // bottom right
tft.color565(0, 0, i));
}
return micros() - start;
}
// ------------------------------------------------
unsigned long testFilledTriangles() {
unsigned long start, t = 0;
int i, cx = tft.width() / 2 - 1,
cy = tft.height() / 2 - 1;
tft.fillScreen(BLACK);
start = micros();
for(i=min(cx,cy); i>10; i-=5) {
start = micros();
tft.fillTriangle(cx, cy - i, cx - i, cy + i, cx + i, cy + i,
tft.color565(0, i, i));
t += micros() - start;
tft.drawTriangle(cx, cy - i, cx - i, cy + i, cx + i, cy + i,
tft.color565(i, i, 0));
}
return t;
}
// ------------------------------------------------
unsigned long testRoundRects() {
unsigned long start;
int w, i, i2,
cx = tft.width() / 2 - 1,
cy = tft.height() / 2 - 1;
tft.fillScreen(BLACK);
w = min(tft.width(), tft.height());
start = micros();
for(i=0; i<w; i+=6) {
i2 = i / 2;
tft.drawRoundRect(cx-i2, cy-i2, i, i, i/8, tft.color565(i, 0, 0));
}
return micros() - start;
}
// ------------------------------------------------
unsigned long testFilledRoundRects() {
unsigned long start;
int i, i2,
cx = tft.width() / 2 - 1,
cy = tft.height() / 2 - 1;
tft.fillScreen(BLACK);
start = micros();
for(i=min(tft.width(), tft.height()); i>20; i-=6) {
i2 = i / 2;
tft.fillRoundRect(cx-i2, cy-i2, i, i, i/8, tft.color565(0, i, 0));
}
return micros() - start;
}
// ------------------------------------------------
The card I use is nano ch340 but I tried it with uno and the result is the same.
Thank you for posting the code.
From the pin configuration you posted earlier, it looks like you are connecting a display using I2C (sck, sda) to the SPI pins (SCK-13,MISO-11) of the Nano. The code example you posted includes the Arduino_ST7789_Fast library which is also designed for driving the display over the SPI interface. If the display does indeed have an I2C interface, then you may need to use a different library and use the SDA/SCL pins on the Nano.
Perhaps first, to confirm this, could you please post a photo or link to the actual display that you are using so that we can determine what it actually is?
Hi, @portakal_tr
Can you please post a copy of your circuit, a picture of a hand drawn circuit in jpg, png?
Hand drawn and photographed is perfectly acceptable.
Please include ALL hardware, power supplies, component names and pin labels.
Thanks.. Tom.. 
Many of the SPI ST7789 boards label the clock and MOSI pins as sck and sda (the one I have for example), leading to a lot of confusion as to the actual interface.
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Thanks for mentioning that. I wonder whether SCK really is the clock signal or whether they got got those the wrong way around as well.....
I agree.
I have used the ST7789 on an ESP32S3 board I have.
The settings file I wrote and use for the pin connections says;
#define MOSI 45 //labeled SDA on ST7789 display
#define SCK 42 //labeled SCL on ST7789 display
#define MISO 41
I was puzzled when I first saw the connection labels, but assumed that SCL would be clock which left SDA for the data to the display.
Friends, I returned the screen, but I can send you a video.
Take a look at how i used my aliepress 320 x 240 ST7789 with the "Adafruit ST7735 and ST7789 Library" and "TFT_eSPI Library"....also i used it with an ESP32 S3. Worked perfectly fine.
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