Tft.drawFastHLine()

drawFastHLine(int16_t x, int16_t y, int16_t w, uint16_t color)

• 作用:
  

在TFT屏幕上画出一条横线

• 参数:
  

x：起始点x轴坐标

y：起始点y轴坐标

w：横线长度

color：线的颜色

• 例子:
  

#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
#endif

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

void setup(void) {
  tft.initR(INITR_BLACKTAB);   // initialize a ST7735S chip, black tab
  tft.fillScreen(ST7735_BLACK);
  tft.drawFastHLine(10, 80, 100, ST7735_YELLOW);
}

void loop() {  }

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