75 lines
1.7 KiB
Arduino
75 lines
1.7 KiB
Arduino
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/*
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Arduino TFT text example
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This example demonstrates how to draw text on the
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TFT with an Arduino. The Arduino reads the value
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of an analog sensor attached to pin A0, and writes
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the value to the LCD screen, updating every
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quarter second.
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This example code is in the public domain
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Created 15 April 2013 by Scott Fitzgerald
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http://www.arduino.cc/en/Tutorial/TFTDisplayText
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*/
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#include <TFT.h> // Arduino LCD library
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#include <SPI.h>
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// pin definition for the Uno
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#define cs 10
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#define dc 9
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#define rst 8
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// pin definition for the Leonardo
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// #define cs 7
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// #define dc 0
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// #define rst 1
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// create an instance of the library
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TFT TFTscreen = TFT(cs, dc, rst);
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// char array to print to the screen
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char sensorPrintout[4];
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void setup() {
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// Put this line at the beginning of every sketch that uses the GLCD:
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TFTscreen.begin();
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// clear the screen with a black background
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TFTscreen.background(0, 0, 0);
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// write the static text to the screen
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// set the font color to white
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TFTscreen.stroke(255, 255, 255);
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// set the font size
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TFTscreen.setTextSize(2);
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// write the text to the top left corner of the screen
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TFTscreen.text("Sensor Value :\n ", 0, 0);
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// ste the font size very large for the loop
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TFTscreen.setTextSize(5);
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}
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void loop() {
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// Read the value of the sensor on A0
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String sensorVal = String(analogRead(A0));
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// convert the reading to a char array
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sensorVal.toCharArray(sensorPrintout, 4);
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// set the font color
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TFTscreen.stroke(255, 255, 255);
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// print the sensor value
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TFTscreen.text(sensorPrintout, 0, 20);
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// wait for a moment
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delay(250);
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// erase the text you just wrote
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TFTscreen.stroke(0, 0, 0);
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TFTscreen.text(sensorPrintout, 0, 20);
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}
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