[136] | 1 | /*
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| 2 | Arduino TFT text example
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| 3 |
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| 4 | This example demonstrates how to draw text on the
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| 5 | TFT with an Arduino. The Arduino reads the value
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| 6 | of an analog sensor attached to pin A0, and writes
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| 7 | the value to the LCD screen, updating every
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| 8 | quarter second.
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| 9 |
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| 10 | This example code is in the public domain
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| 11 |
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| 12 | Created 15 April 2013 by Scott Fitzgerald
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| 13 |
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| 14 | http://arduino.cc/en/Tutorial/TFTDisplayText
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| 15 |
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| 16 | */
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| 17 |
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| 18 | #include <TFT.h> // Arduino LCD library
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| 19 | #include <SPI.h>
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| 20 |
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| 21 | // pin definition for the Uno
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| 22 | #define cs 10
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[175] | 23 | #define dc 9
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| 24 | #define rst 8
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[136] | 25 |
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| 26 | // pin definition for the Leonardo
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| 27 | // #define cs 7
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| 28 | // #define dc 0
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| 29 | // #define rst 1
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| 30 |
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| 31 | // create an instance of the library
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| 32 | TFT TFTscreen = TFT(cs, dc, rst);
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| 33 |
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| 34 | // char array to print to the screen
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| 35 | char sensorPrintout[4];
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| 36 |
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| 37 | void setup() {
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| 38 |
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| 39 | // Put this line at the beginning of every sketch that uses the GLCD:
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| 40 | TFTscreen.begin();
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| 41 |
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| 42 | // clear the screen with a black background
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| 43 | TFTscreen.background(0, 0, 0);
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| 44 |
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| 45 | // write the static text to the screen
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| 46 | // set the font color to white
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| 47 | TFTscreen.stroke(255, 255, 255);
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| 48 | // set the font size
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| 49 | TFTscreen.setTextSize(2);
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| 50 | // write the text to the top left corner of the screen
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| 51 | TFTscreen.text("Sensor Value :\n ", 0, 0);
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| 52 | // ste the font size very large for the loop
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| 53 | TFTscreen.setTextSize(5);
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| 54 | }
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| 55 |
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| 56 | void loop() {
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| 57 |
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| 58 | // Read the value of the sensor on A0
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| 59 | String sensorVal = String(analogRead(A0));
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| 60 |
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| 61 | // convert the reading to a char array
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| 62 | sensorVal.toCharArray(sensorPrintout, 4);
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| 63 |
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| 64 | // set the font color
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| 65 | TFTscreen.stroke(255, 255, 255);
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| 66 | // print the sensor value
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| 67 | TFTscreen.text(sensorPrintout, 0, 20);
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| 68 | // wait for a moment
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| 69 | delay(250);
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| 70 | // erase the text you just wrote
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| 71 | TFTscreen.stroke(0, 0, 0);
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| 72 | TFTscreen.text(sensorPrintout, 0, 20);
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| 73 | }
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| 74 |
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