The combination of Adafruit 3.5" display, GFX, and HX8357 libraries is locking up in the sketch below. The sketch just calls ShiftKey() to switch between lower case and upper case chars every 2 seconds.
Unfortunately, it starts out with lower case, switches to upper case, back to lower case, and then locks up every time.
I am using the latest versions of both libraries and Arduino UNO with Arduino version 1.8.10 software.
The lower and upper case displays are attached. What am I missing?
#include "Adafruit_HX8357.h"
#include <Adafruit_GFX.h>
#include "TouchScreen.h"
// The display uses hardware SPI, plus #9 & #10
#define TFT_RST -1 // tied to arduino RST
#define TFT_DC 9
#define TFT_CS 10
// These are the four touchscreen analog pins
#define YP A2 // must be an analog pin, use "An" notation!
#define XM A3 // must be an analog pin, use "An" notation!
#define YM 7 // can be a digital pin
#define XP 8 // can be a digital pin
// This is calibration data for the raw touch data to the screen coordinates
#define TS_MINX 115 // bottom
#define TS_MINY 75
#define TS_MAXX 910
#define TS_MAXY 925
#define MINPRESSURE 5
#define MAXPRESSURE 1000
// cell and text size
#define CELLWIDTH 35
#define CELLHEIGHT 45
#define TEXTSIZE 3
// Blinking cursor home
#define CURXSTART 72
#define CURYSTART 12
// Colors
#define SCREENCOLOR 0xB5B6
#define BLACK 0x0000
#define WHITE 0xFFFF
Adafruit_HX8357 tft = Adafruit_HX8357(TFT_CS, TFT_DC, TFT_RST);
TouchScreen tscr = TouchScreen(XP, YP, XM, YM, 500);
int ts[7][2] = {{4, 6}, {6, 6}, {10, 12}, {16, 20}, {22, 28}, {28, 34}, {32, 42}};
boolean shifted = false;
boolean keyboardActive = false;
boolean cursorOn = false;
int curX = CURXSTART;
int curY = CURYSTART;
int index = 0;
boolean escape = false;
boolean textComplete = false;
String lowQwert = "qwertyuiopasdfghjkl-zxcvbnm<>+,.[]\\/|\"""_'";
String uprQwert = "QWERTYUIOPASDFGHJKL-ZXCVBNM<>+,.[]\\/|\"""_'";
String numbers = "1234567890";
String symbols = "!@#$%^&*()";
char text[19];
unsigned long timeNow, timeLast;
typedef struct charLocations
{
char lChar;
char uChar;
int x;
int y;
};
charLocations charLocs[50];
typedef struct specialLocations
{
int x;
int y;
int16_t (*funct)();
};
specialLocations specialLocs[6];
void setup()
{
Serial.begin(115200);
tft.begin();
lowQwert.replace("\"", "\\\""); // fix the escape charater (\) in the lowQwert string
uprQwert.replace("\"", "\\\""); // fix the escape charater (\) in the uprQwert string
loadArray();
tft.fillScreen(SCREENCOLOR);
DrawTextBox();
DrawKeyboard();
// timeLast = millis();
}
void loop()
{
delay(1000);
ShiftKey();
}
void BackSpaceKey()
{
}
void EnterKey()
{
}
void EscapeKey()
{
}
void SpaceKey()
{
}
void ShiftKey()
{
shifted = !shifted;
ReDrawCharacters();
}
String ReDrawCharacters()
{
tft.setRotation(1);
tft.setTextSize(3);
tft.setTextColor(BLACK);
// clear the first 4 rows of characters (row 5 never changes)
for (int r = 0; r < 4; r++) // 5 row loop
{
for (int c = 0; c < 10; c++) // 10 column loop
{
tft.fillRect(70 + c * CELLWIDTH, r * (CELLHEIGHT - 1) + 78, 20, 24, SCREENCOLOR);
}
}
// redraw the first 4 rows of characters
for (int r = 0; r < 4; r++) // 5 row loop
{
for (int c = 0; c < 10; c++) // 10 column loop
{
tft.setCursor(70 + c * CELLWIDTH, r * CELLHEIGHT - 1 + 78);
if (shifted) // is the keyboard shifted?
{
tft.print(charLocs[r * 10 + c].uChar); // yes
}
else
{
tft.print(charLocs[r * 10 + c].lChar); // no
}
}
}
}
void ChangeCursor()
{
cursorOn = !cursorOn;
tft.setRotation(1);
if (cursorOn)
tft.fillRect(curX, curY, 8, 36, BLACK);
else
tft.fillRect(curX, curY, 8, 36, WHITE);
}
void DrawKeyboard()
{
keyboardActive = true;
tft.setRotation(1);
tft.setTextSize(3);
tft.setTextColor(BLACK);
// draw the outside box
tft.drawRect(60, 65, 354, 225, BLACK);
// draw the vertical and horizontal cell divider lines
for (int i = 0; i < 9; i++)
{
tft.drawFastVLine(100 + i * 34, 65, 218, BLACK);
if (i % 2 == 0)
tft.drawFastHLine(61, 65 + 44 * i / 2, 352, BLACK);
}
// draw 5 rows of characters
for (int r = 0; r < 5; r++) // 5 row loop
{
for (int c = 0; c < 10; c++) // 10 column loop
{
tft.setCursor(70 + c * CELLWIDTH, r * 44 + 78);
if (shifted) // is the keyboard shifted?
{
tft.print(charLocs[r * 10 + c].uChar); // yes
}
else
{
tft.print(charLocs[r * 10 + c].lChar); // no
}
}
}
// draw the special keys
tft.drawRect(1, 65, 60, CELLHEIGHT, BLACK); // draw the escape key
tft.setCursor(5, 78);
tft.print("ESC");
tft.drawRect(413, 65, 65, CELLHEIGHT, BLACK); // draw the backspace key
tft.setCursor(432, 78);
tft.print("BS");
tft.drawRect(413, 109, 65, 89, BLACK); // draw the enter key
tft.setCursor(421, 145);
tft.print("ENT");
tft.drawRect(1, 241, 60, 49, BLACK); // draw the shift key
tft.setCursor(5, 255);
tft.print("SFT");
tft.drawRect(413, 197, 65, 93, BLACK); // draw the space key
tft.setCursor(431, 232);
tft.print("SP");
}
void DrawTextBox()
{
curX = CURXSTART;
curY = CURYSTART;
index = 0;
tft.setRotation(1);
tft.fillScreen(SCREENCOLOR);
tft.fillRect(70, 10, 336, 40, WHITE); // draw the input text box
}
void loadArray()
{
// load numbers and symbols
for (int i = 0; i < 10; i++)
{
charLocs[i].lChar = numbers[i];
charLocs[i].uChar = symbols[i];
}
// load characters
for (int i = 10; i < 50; i++)
{
charLocs[i].lChar = lowQwert[i - 10];
charLocs[i].uChar = uprQwert[i - 10];
}
// load character locations
int i = 0;
for (int r = 0; r < 5; r++)
for (int c = 0; c < 10; c++)
{
charLocs[i].x = 70 + c * CELLWIDTH;
charLocs[i++].y = r * 44 + 78;
}
// load the special keys
specialLocs[4].x = 1; // load the escape key
specialLocs[4].y = 65;
specialLocs[4].funct = EscapeKey;
specialLocs[3].x = 413; // load the backspace key
specialLocs[3].y = 65;
specialLocs[3].funct = BackSpaceKey;
specialLocs[1].x = 413; // load the enter key
specialLocs[1].y = 109;
specialLocs[1].funct = EnterKey;
specialLocs[0].x = 1; // load the shift key
specialLocs[0].y = 241;
specialLocs[0].funct = ShiftKey;
specialLocs[2].x = 413; // load the space key
specialLocs[2].y = 197;
specialLocs[2].funct = SpaceKey;
}
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