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/*******************************************************************************************************
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Programs for Arduino - Copyright of the author Stuart Robinson - 30/09/20
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This program is supplied as is, it is up to the user of the program to decide if the program is
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suitable for the intended purpose and free from errors.
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*******************************************************************************************************/
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/*******************************************************************************************************
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Program Operation - This program is a simple test program for the LIL9341 TFT display that comes in a
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range of sizes. The program prints a short message on each line, pauses, clears the screen, and starts
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again. Program uses Adafruit ILI9341 library.
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Screen write time on Arduino DUE 332mS, screen clear 268mS
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Screen write time on Teensy 4.1 207mS, screen clear 180mS
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Serial monitor baud rate is set at 9600.
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*******************************************************************************************************/
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#include "SPI.h"
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#include "Adafruit_GFX.h" //get library here > https://github.com/adafruit/Adafruit-GFX-Library
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#include "Adafruit_ILI9341.h" //get library here > https://github.com/adafruit/Adafruit_ILI9341
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int8_t DISPCS = 10;
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int8_t DISPDC = 8;
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//int8_t DISPCS = 43; //for DUE shield
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//int8_t DISPDC = 45; //for DUE shield
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Adafruit_ILI9341 disp = Adafruit_ILI9341(DISPCS, DISPDC);
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#define textscale 2 //default text scale
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uint16_t writecount;
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uint32_t startmS, endmS, timemS;
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void loop()
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{
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setCursor(0, 0);
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disp.setTextColor(ILI9341_WHITE);
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disp.setTextSize(textscale);
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writecount++;
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Serial.print(writecount);
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Serial.print(F(" Writing to display"));
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startmS = millis();
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disp.fillScreen(ILI9341_BLACK); //clear screen
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screen1();
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endmS = millis();
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timemS = endmS - startmS;
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setCursor(8, 4);
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disp.print(timemS);
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disp.print(F("mS"));
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Serial.print(F(" - done "));
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Serial.print(timemS);
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Serial.println(F("mS"));
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delay(2000);
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startmS = millis();
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disp.fillScreen(ILI9341_BLACK); //clear screen
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endmS = millis();
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timemS = endmS - startmS;
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setCursor(0, 0);
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disp.print(F("Screen clear "));
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disp.print(timemS);
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disp.print(F("mS"));
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delay(2000);
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}
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void setCursor(uint8_t lcol, uint8_t lrow)
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{
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disp.setCursor((lcol * 6 * textscale), (lrow * 10 * textscale));
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}
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void screen1()
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{
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setCursor(0, 0);
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disp.print(F("ILI9341_Checker"));
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setCursor(0, 1);
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disp.print(F("Line 1"));
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setCursor(0, 2);
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disp.print(F("Line 2"));
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setCursor(0, 3);
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disp.print(F("Line 3"));
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setCursor(0, 4);
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disp.print(F("Line 4"));
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setCursor(0, 5);
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disp.print(F("Line 5"));
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setCursor(0, 6);
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disp.print(F("Line 6"));
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setCursor(0, 7);
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disp.print(F("Line 7"));
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setCursor(0, 8);
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disp.print(F("Line 8"));
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setCursor(0, 9);
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disp.print(F("Line 9"));
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setCursor(0, 10);
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disp.print(F("Line 10"));
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setCursor(0, 11);
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disp.print(F("01234567890123456789012")); //display is 12 lines x 23 charaters
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}
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void setup()
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{
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Serial.begin(9600);
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Serial.println(F("77_ILI9341_Display_Checker starting"));
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SPI.begin();
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disp.begin();
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//disp.setFont(Arial_16);
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disp.fillScreen(ILI9341_BLACK);
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disp.setTextColor(ILI9341_WHITE);
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disp.setRotation(1);
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disp.setTextSize(textscale);
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}
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