60 lines
1.8 KiB
Markdown
60 lines
1.8 KiB
Markdown
# TFT screen
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## Prequesites
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To use the TFT screen, you need to install the following libraries:
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``` SPI.h , Adafruit_GFX.h, Adafruit_ST7796S_kbv.h ```
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## Programming the screen
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To program the screen we need to first declare all the pins and give it to the Adafruit_ST7796S_kbv.h library. Then we need to initialize the screen and we can start using it.
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```cpp
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#define TFT_CS 14
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#define TFT_DC 13
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#define TFT_RST 12
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#define MOSI 11
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#define SCK 10
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#define MISO 9
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//simplify the name of the library and feed all the correct pins to it
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Adafruit_ST7796S_kbv tft = Adafruit_ST7796S_kbv(TFT_CS, TFT_DC, MOSI, SCK, TFT_RST, MISO);
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```
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## Drawing on the screen
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To draw on the screen we can use the following functions:
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```cpp
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tft.fillScreen(0x0000); //clear the screen
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tft.fillRect(0, 0, 240, 240, 0xFFFF); //draw a white rectangle
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tft.fillCircle(120, 120, 50, 0xF800); //draw a red circle
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tft.fillTriangle(0, 0, 240, 240, 0, 240, 0x1F); //draw a blue triangle
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tft.fillRoundRect(0, 0, 240, 240, 10, 0xF81F); //draw a pink rounded rectangle
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tft.drawChar(120, 120, 'A', 0xFFFF, 0x0000, 2); //draw a character
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tft.setTextSize(2); //set the text size
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tft.setTextColor(0xFFFF); //set the text color
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tft.setCursor(0, 0); //set the cursor
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tft.println("Hello World!"); //print a string
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```
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To write Hello world on the screen we can use the following code:
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```cpp
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tft.fillScreen(0x0000); //clear the screen
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tft.setTextSize(2); //set the text size
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tft.setTextColor(0xFFFF); //set the text color
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tft.setCursor(0, 0); //set the cursor so it starts at the top right, you can also make this other numbers to change the position
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tft.println("Hello World!"); //print a string
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```
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To clear the screen for new text you can use the following code:
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```cpp
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tft.fillScreen(0x0000); //clear the screen
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```
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