Lat / Long dynamically display live data on dot matrix LCds but not on TFT

Hi

I have using a SIM7000E shield with adruino mega or uno i have been able to have the lat / long ( derived form the GPs ship set on the sim7000 ) display on the dot matrix lcd

I even have if statements to output if any part of the boot up process fails is displays a message

All workds fine on the Dot Matrix LCD

However when i try and display the data on a 2.8 inch tvt screen, i am able to have standard text data display however it seem there is an issue with displaying dynamic data and or data controlled by if statements

the result i get is the static content displays and it appears the screen reboots each time it reaches the if statements and the dynamic data

please see code below any assistance would be appreciated

#include <Adafruit_GFX.h>    // Core graphics library
#include <Adafruit_TFTLCD.h> // Hardware-specific library

#define LCD_CS A3 // Chip Select goes to Analog 3
#define LCD_CD A2 // Command/Data goes to Analog 2
#define LCD_WR A1 // LCD Write goes to Analog 1
#define LCD_RD A0 // LCD Read goes to Analog 0

#define LCD_RESET A4 // Can alternately just connect to Arduino's reset pin

#define	BLACK   0x0000
#define	BLUE    0x001F
#define	RED     0xF800
#define	GREEN   0x07E0
#define CYAN    0x07FF
#define MAGENTA 0xF81F
#define YELLOW  0xFFE0
#define WHITE   0xFFFF

Adafruit_TFTLCD tft(LCD_CS, LCD_CD, LCD_WR, LCD_RD, LCD_RESET);

void setup(void) {

  tft.reset();
  tft.begin(0x9328);
  tft.fillScreen(BLACK);
}
int count=0;
void loop() {
  tft.setRotation(1);
  testText();
  delay(2000);
}

unsigned long testText() {
//  tft.fillScreen(BLACK);
  unsigned long start = micros();
  tft.setCursor(0, 0);
  tft.setTextColor(GREEN);
  tft.setTextSize(1);
  tft.println(" ");
  tft.setTextColor(BLUE);
  tft.setTextSize(5);
  tft.println("  You're");   
  tft.println(" Speeding!");
  tft.setTextSize(4);
  tft.println("111/100 Zone");
  tft.setTextSize(2);
  tft.println(" ");
  tft.setTextSize(4);
  count = (count+1);
  tft.println(count);
  
  return micros() - start;
}

Hi Claude,

Your code seems to be missing some parts. Could you please post the complete code? Try using some of the example code that you can find as a part of the library you are using and see how that works out!

// IMPORTANT: Adafruit_TFTLCD LIBRARY MUST BE SPECIFICALLY
// CONFIGURED FOR EITHER THE TFT SHIELD OR THE BREAKOUT BOARD.
// SEE RELEVANT COMMENTS IN Adafruit_TFTLCD.h FOR SETUP.

#include <Adafruit_GFX.h>    // Core graphics library
#include <Adafruit_TFTLCD.h> // Hardware-specific library

// The control pins for the LCD can be assigned to any digital or
// analog pins...but we'll use the analog pins as this allows us to
// double up the pins with the touch screen (see the TFT paint example).
#define LCD_CS A3 // Chip Select goes to Analog 3
#define LCD_CD A2 // Command/Data goes to Analog 2
#define LCD_WR A1 // LCD Write goes to Analog 1
#define LCD_RD A0 // LCD Read goes to Analog 0

#define LCD_RESET A4 // Can alternately just connect to Arduino's reset pin

// When using the BREAKOUT BOARD only, use these 8 data lines to the LCD:
// For the Arduino Uno, Duemilanove, Diecimila, etc.:
//   D0 connects to digital pin 8  (Notice these are
//   D1 connects to digital pin 9   NOT in order!)
//   D2 connects to digital pin 2
//   D3 connects to digital pin 3
//   D4 connects to digital pin 4
//   D5 connects to digital pin 5
//   D6 connects to digital pin 6
//   D7 connects to digital pin 7
// For the Arduino Mega, use digital pins 22 through 29
// (on the 2-row header at the end of the board).

// Assign human-readable names to some common 16-bit color values:
#define	BLACK   0x0000
#define	BLUE    0x001F
#define	RED     0xF800
#define	GREEN   0x07E0
#define CYAN    0x07FF
#define MAGENTA 0xF81F
#define YELLOW  0xFFE0
#define WHITE   0xFFFF

Adafruit_TFTLCD tft(LCD_CS, LCD_CD, LCD_WR, LCD_RD, LCD_RESET);
// If using the shield, all control and data lines are fixed, and
// a simpler declaration can optionally be used:
// Adafruit_TFTLCD tft;

void setup(void) {
  Serial.begin(9600);
  Serial.println(F("TFT LCD test"));

#ifdef USE_ADAFRUIT_SHIELD_PINOUT
  Serial.println(F("Using Adafruit 2.8\" TFT Arduino Shield Pinout"));
#else
  Serial.println(F("Using Adafruit 2.8\" TFT Breakout Board Pinout"));
#endif

  tft.reset();

  uint16_t identifier = tft.readID();

  if(identifier == 0x9325) {
    Serial.println(F("Found ILI9325 LCD driver"));
  } else if(identifier == 0x9328) {
    Serial.println(F("Found ILI9328 LCD driver"));
  } else if(identifier == 0x7575) {
    Serial.println(F("Found HX8347G LCD driver"));
  } else if(identifier == 0x9341) {
    Serial.println(F("Found ILI9341 LCD driver"));
  } else if(identifier == 0x8357) {
    Serial.println(F("Found HX8357D LCD driver"));
  } else {
    Serial.print(F("Unknown LCD driver chip: "));
    Serial.println(identifier, HEX);
    Serial.println(F("If using the Adafruit 2.8\" TFT Arduino shield, the line:"));
    Serial.println(F("  #define USE_ADAFRUIT_SHIELD_PINOUT"));
    Serial.println(F("should appear in the library header (Adafruit_TFT.h)."));
    Serial.println(F("If using the breakout board, it should NOT be #defined!"));
    Serial.println(F("Also if using the breakout, double-check that all wiring"));
    Serial.println(F("matches the tutorial."));
    return;
  }

  tft.begin(identifier);

  tft.fillScreen(BLACK);

  Serial.println(F("This is a test of the rotation capabilities of the TFT library!"));
  Serial.println(F("Press <SEND> (or type a character) to advance"));
}

void loop(void) {
  rotatePixel();
  rotateLine();
  rotateFastline();
  rotateDrawrect();
  rotateFillrect();
  rotateDrawcircle();
  rotateFillcircle();
  rotateText();
}

void rotateText() {
  for (uint8_t i=0; i<4; i++) {
    tft.fillScreen(BLACK);
    Serial.println(tft.getRotation(), DEC);

    tft.setCursor(0, 30);
    tft.setTextColor(RED);
    tft.setTextSize(1);
    tft.println("Hello World!");
    tft.setTextColor(YELLOW);
    tft.setTextSize(2);
    tft.println("Hello World!");
    tft.setTextColor(GREEN);
    tft.setTextSize(3);
    tft.println("Hello World!");
    tft.setTextColor(BLUE);
    tft.setTextSize(4);
    tft.print(1234.567);

    while (!Serial.available());
    Serial.read();  Serial.read();  Serial.read();

    tft.setRotation(tft.getRotation()+1);
  }
}

void rotateFillcircle(void) {
  for (uint8_t i=0; i<4; i++) {
    tft.fillScreen(BLACK);
    Serial.println(tft.getRotation(), DEC);

    tft.fillCircle(10, 30, 10, YELLOW);

    while (!Serial.available());
    Serial.read();  Serial.read();  Serial.read();

    tft.setRotation(tft.getRotation()+1);
  }
}

void rotateDrawcircle(void) {
  for (uint8_t i=0; i<4; i++) {
    tft.fillScreen(BLACK);
    Serial.println(tft.getRotation(), DEC);

    tft.drawCircle(10, 30, 10, YELLOW);

    while (!Serial.available());
    Serial.read();  Serial.read();  Serial.read();

    tft.setRotation(tft.getRotation()+1);
  }
}

void rotateFillrect(void) {
  for (uint8_t i=0; i<4; i++) {
    tft.fillScreen(BLACK);
    Serial.println(tft.getRotation(), DEC);

    tft.fillRect(10, 20, 10, 20, GREEN);

    while (!Serial.available());
    Serial.read();  Serial.read();  Serial.read();

    tft.setRotation(tft.getRotation()+1);
  }
}

void rotateDrawrect(void) {
  for (uint8_t i=0; i<4; i++) {
    tft.fillScreen(BLACK);
    Serial.println(tft.getRotation(), DEC);

    tft.drawRect(10, 20, 10, 20, GREEN);

    while (!Serial.available());
    Serial.read();  Serial.read();  Serial.read();

    tft.setRotation(tft.getRotation()+1);
  }
}

void rotateFastline(void) {
  for (uint8_t i=0; i<4; i++) {
    tft.fillScreen(BLACK);
    Serial.println(tft.getRotation(), DEC);

    tft.drawFastHLine(0, 20, tft.width(), RED);
    tft.drawFastVLine(20, 0, tft.height(), BLUE);

    while (!Serial.available());
    Serial.read();  Serial.read();  Serial.read();

    tft.setRotation(tft.getRotation()+1);
  }
}

void rotateLine(void) {
  for (uint8_t i=0; i<4; i++) {
    tft.fillScreen(BLACK);
    Serial.println(tft.getRotation(), DEC);

    tft.drawLine(tft.width()/2, tft.height()/2, 0, 0, RED);
    while (!Serial.available());
    Serial.read();  Serial.read();  Serial.read();

    tft.setRotation(tft.getRotation()+1);
  }
}

void rotatePixel(void) {
  for (uint8_t i=0; i<4; i++) {
    tft.fillScreen(BLACK);
    Serial.println(tft.getRotation(), DEC);

    tft.drawPixel(10,20, RED);
    while (!Serial.available());
    Serial.read();  Serial.read();  Serial.read();

    tft.setRotation(tft.getRotation()+1);
  }
}

I hope that helps! Let us know how it works out!

Hi

As indicated it works fine when I have hard coded text and refreshes through the loop perfectly

Its only when I add the dynamic generated values with the If statements that the issue occurs

The code with dynamic. Generated values and the if statements works perfectly on the dot matrix lcd screens

Claude Raiola

0414 228 948

Claude,

Could you please share the entire code, both working and not working? I won’t be able to make suggestions about you code without seeing it first.

Thanks!