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tft.fillCircle(int16_t x0, int16_t y0, int16_t r, uint16_t color)
  • Effect:

Draw a solid circle on the TFT screen

  • Parameters:

x0:x coordinate of the center point

y0:y coordinate of the center point

r:radius of the circle

color:teh color of the circle

  • Example:
#define sclk 13
#define mosi 11
#define cs   5
#define dc   4
#define rst  -1  // you can also connect this to the Arduino reset

#include <Adafruit_GFX.h>    // Core graphics library
#include <Adafruit_ST7735.h> // Hardware-specific library
#include <SPI.h>

#if defined(__SAM3X8E__)
    #undef __FlashStringHelper::F(string_literal)
    #define F(string_literal) string_literal

Adafruit_ST7735 tft = Adafruit_ST7735(cs, dc, mosi, sclk, rst);

void setup(void) {
  tft.initR(INITR_BLACKTAB);   // initialize a ST7735S chip, black tab
  tft.fillCircle(40, 40, 20, ST7735_YELLOW);

void loop() {  }

[Return to TFT_ST7735 Syntax Manual]