This post shows how to connect the Arduino with ST7735 160×128 SPI TFT module. This type of TFT is a small size, low cost and easy to use. In this example I used the TFT shown below (ST7735S):
Generally it has 8 pins: RST (reset), CS (chip select), D/C (data/command), DIN (data in), CLK (clock), VCC, BL (backlight) and GND.
The ST7735 TFT uses SPI (serial peripheral interface) protocol to communicate with the master device which is in this example the Arduino board microcontroller.
Components Required:
- Arduino board
- ST7735 TFT screen
- 5 x 1K ohm resistor
- Breadboard
- Jumper wires
The circuit:
Circuit schematic diagram is shown below.
The ST7735 TFT works with 3.3V and the Arduino uno works with 5V, supplying the TFT control lines directly with 5V my damage it, so we have to add the five 1K ohm resistors. The ST7735 board is supplied with 5V which comes from the Arduino board (the TFT board contains AMS1117 3V3 voltage regulator which steps down the 5V to 3.3V).
Arduino code:
We need 2 libraries (Adafruit_ST7735 and Adafruit_GFX) from Adafruit industries in order to compile the Arduino code below, these libraries can be downloaded from the link below:
Download
Place both libraries in Arduino IDE libraries folder.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 | // Arduino ST7735 1.8" TFT example #include <Adafruit_GFX.h> // Core graphics library #include <Adafruit_ST7735.h> // Hardware-specific library #include <SPI.h> #define TFT_CS 9 // TFT CS pin is connected to arduino pin 9 #define TFT_DC 10 // TFT DC pin is connected to arduino pin 10 Adafruit_ST7735 tft = Adafruit_ST7735(TFT_CS, TFT_DC); float p = 3.1415926; void setup(void) { tft.initR(INITR_BLACKTAB); // initialize a ST7735S chip, black tab uint16_t time = millis(); tft.fillScreen(ST7735_BLACK); time = millis() - time; delay(500); // large block of text tft.fillScreen(ST7735_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. ", ST7735_WHITE); delay(1000); // tft print function! tftPrintTest(); delay(4000); // a single pixel tft.drawPixel(tft.width()/2, tft.height()/2, ST7735_GREEN); delay(500); // line draw test testlines(ST7735_YELLOW); delay(500); // optimized lines testfastlines(ST7735_RED, ST7735_BLUE); delay(500); testdrawrects(ST7735_GREEN); delay(500); testfillrects(ST7735_YELLOW, ST7735_MAGENTA); delay(500); tft.fillScreen(ST7735_BLACK); testfillcircles(10, ST7735_BLUE); testdrawcircles(10, ST7735_WHITE); delay(500); testroundrects(); delay(500); testtriangles(); delay(500); mediabuttons(); delay(500); delay(1000); } void loop() { tft.invertDisplay(true); delay(500); tft.invertDisplay(false); delay(500); } void testlines(uint16_t color) { tft.fillScreen(ST7735_BLACK); for (int16_t x=0; x < tft.width(); x+=6) { tft.drawLine(0, 0, x, tft.height()-1, color); } for (int16_t y=0; y < tft.height(); y+=6) { tft.drawLine(0, 0, tft.width()-1, y, color); } tft.fillScreen(ST7735_BLACK); for (int16_t x=0; x < tft.width(); x+=6) { tft.drawLine(tft.width()-1, 0, x, tft.height()-1, color); } for (int16_t y=0; y < tft.height(); y+=6) { tft.drawLine(tft.width()-1, 0, 0, y, color); } tft.fillScreen(ST7735_BLACK); for (int16_t x=0; x < tft.width(); x+=6) { tft.drawLine(0, tft.height()-1, x, 0, color); } for (int16_t y=0; y < tft.height(); y+=6) { tft.drawLine(0, tft.height()-1, tft.width()-1, y, color); } tft.fillScreen(ST7735_BLACK); for (int16_t x=0; x < tft.width(); x+=6) { tft.drawLine(tft.width()-1, tft.height()-1, x, 0, color); } for (int16_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.setCursor(0, 0); tft.setTextColor(color); tft.setTextWrap(true); tft.print(text); } void testfastlines(uint16_t color1, uint16_t color2) { tft.fillScreen(ST7735_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(ST7735_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(ST7735_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(ST7735_BLACK); int 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(ST7735_BLACK); int 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(ST7735_BLACK); tft.setCursor(0, 30); tft.setTextColor(ST7735_RED); tft.setTextSize(1); tft.println("Hello World!"); tft.setTextColor(ST7735_YELLOW); tft.setTextSize(2); tft.println("Hello World!"); tft.setTextColor(ST7735_GREEN); tft.setTextSize(3); tft.println("Hello World!"); tft.setTextColor(ST7735_BLUE); tft.setTextSize(4); tft.print(1234.567); delay(1500); tft.setCursor(0, 0); tft.fillScreen(ST7735_BLACK); tft.setTextColor(ST7735_WHITE); tft.setTextSize(0); tft.println("Hello World!"); tft.setTextSize(1); tft.setTextColor(ST7735_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(ST7735_WHITE); tft.println("Sketch has been"); tft.println("running for: "); tft.setTextColor(ST7735_MAGENTA); tft.print(millis() / 1000); tft.setTextColor(ST7735_WHITE); tft.print(" seconds."); } void mediabuttons() { // play tft.fillScreen(ST7735_BLACK); tft.fillRoundRect(25, 10, 78, 60, 8, ST7735_WHITE); tft.fillTriangle(42, 20, 42, 60, 90, 40, ST7735_RED); delay(500); // pause tft.fillRoundRect(25, 90, 78, 60, 8, ST7735_WHITE); tft.fillRoundRect(39, 98, 20, 45, 5, ST7735_GREEN); tft.fillRoundRect(69, 98, 20, 45, 5, ST7735_GREEN); delay(500); // play color tft.fillTriangle(42, 20, 42, 60, 90, 40, ST7735_BLUE); delay(50); // pause color tft.fillRoundRect(39, 98, 20, 45, 5, ST7735_RED); tft.fillRoundRect(69, 98, 20, 45, 5, ST7735_RED); // play color tft.fillTriangle(42, 20, 42, 60, 90, 40, ST7735_GREEN); } |
Example small video:
Arduino projects with ST7735 TFT display:
Arduino and ST7735R TFT Proteus simulation
Arduino with DS3231 and ST7735 color TFT
Interfacing Arduino with ST7735 display and DS18B20 temperature sensor
Arduino with LM35 temperature sensor and ST7735 color display
Interfacing Arduino with DHT11 sensor and ST7735 TFT display
Arduino Interface with ST7735 TFT and DHT22 sensor
Arduino Real time clock with ST7735 color TFT and DS1307
Arduino clock with DS3231 and ST7735 color display
Interfacing Arduino with BMP280 sensor & ST7735 TFT
Arduino weather station with ST7735 color TFT display
Reference:
Adafruit industries
Discover more from Simple Circuit
Subscribe to get the latest posts sent to your email.
Great! I think you just stopped me getting a nervous breakdown.