Continuation of lcd display error

This is an continuation of @Graphite s problem

27 Replies

I recommend checking if the solder is good. If you have the budget, maybe buy an esp32, and check if you can find the driver in the webpage where you bought the lcd from

Fireguy9143•16h ago

The TFT on wokwi is different from the 1.77 tft Graphite is using. I made a counter to display in the loop section, and it's upside down and backwards but it works.

//intialize a count variable at the top 
int count=0;

void loop() {
  
  for(count=0; count<100; count++){
    tft.setTextColor(ST7735_WHITE);
    tft.setTextSize(0);
    tft.setCursor(30,90);
    tft.println(count);
    delay(500);
    tft.setTextColor(ST7735_BLACK);
    tft.setTextSize(0);
    tft.setCursor(30,90);
    tft.println(count);
  }
}

//intialize a count variable at the top 
int count=0;

void loop() {
  
  for(count=0; count<100; count++){
    tft.setTextColor(ST7735_WHITE);
    tft.setTextSize(0);
    tft.setCursor(30,90);
    tft.println(count);
    delay(500);
    tft.setTextColor(ST7735_BLACK);
    tft.setTextSize(0);
    tft.setCursor(30,90);
    tft.println(count);
  }
}

…Aarav…OP•16h ago

I gtg in an few mins @Graphite if you have time, @Fireguy9143 might have found an solution for you The thing is, the code works in like the first second. So it might be a clock error, or communication SPI/I2c error. The wrong pins might be used, the arduino might be fried, or the wrong or corrupted driver might have been used @Graphite please share the place you got this screen for (the link) I gotta go

Fireguy9143•16h ago

If the display works on reset, it means the driver is working even if it "shouldn't". This seems like it must be a problem executing the code. I think it would be good to check the loop and see if it runs, and check the voltages on the pins.

…Aarav…OP•16h ago

Is this an hardware or software problem? If it’s code , then I think the next strip should be completely clearing the clash like I shared earlier *flash not clash 1. Open avrdude Folder Go to: C:\Program Files (x86)\Arduino\hardware\tools\avr\bin This folder contains avrdude.exe. ⸻ 2. Open Command Prompt in that Folder • Hold Shift + Right-Click inside the folder. • Select Open PowerShell window here (or Command Prompt). ⸻ 3. Run Erase Command Replace COM3 with your Arduino’s port: .\avrdude -c arduino -p atmega328p -P COM3 -b 115200 -e This erases the entire flash memory, including the bootloader. ^ to clear flash, but you would have to completely install the uploader which idk how to do

AnonEngineering•16h ago

i would play with the bootloader as an absolute last resort if you can upload and run Blink the bootloader is OK

AnonEngineering•16h ago

what is this all about?

…Aarav…OP•16h ago

This is @Graphite s problem and he’s sleeping rn Wait that’s prob the problem And an cooked board

…Aarav…OP•15h ago

@AnonEngineering

Fireguy9143•15h ago

Maybe found a major disconnect. In the wokwi there is only the larger TFT, and it has: 1 VCC => 5v 2 GND => virtual Nano GND 3 CS => Chip select virtual pin 10 4 RST => RESET virtual pin 8 5 D/C =>DATA/COMMAND virtual pin 9 6 MOSI =>Master out/Slave In virtual pin 11 7 SCK =>Serial Clock virtual pin 13 8 LED => 3.3V 9 MISO (which I didn't use) And the above setup worked with the code as it was written/provided... On the pic that Graphite sent, it has: 1 GND => Nano GND 2 VCC => 5V 3 SCK => PIN D8 (Maybe should be A5?) 4 SDA => PIN D12? (Maybe should be A4?) 5 RES =>RESET PIN 13? (Maybe should not be the MOSI variable in the code?) 6 RS =>Data/Command PIN 9? 7 CS => CHIP SELECT PIN 10? 8 LEDA =>3.3V? 9 LEDA 10 GT_CS 11 GT_SI 12 GT_SO 13 GT_SCL 14 GND It looks like maybe your TFT is mixing up the clock and reset pins?

AnonEngineering•15h ago

the story continues, it's going to turn out to be one or more of the above issues 🙂

Fireguy9143•15h ago

Well, it's been an interesting puzzle. I hope we hear back on what's what.

…Aarav…OP•15h ago

It’s very interesting…

DarwinWasWrong•15h ago

The OP "confirmed" the wiring.

Fireguy9143•15h ago

Yeah, I know. My chart is best guess from the overlapping wires

…Aarav…OP•15h ago

Is it hardware or software?

AnonEngineering•15h ago

my bet is wiring of some sort

…Aarav…OP•15h ago

K OP has tried multiple different codes

AnonEngineering•15h ago

that whole reset business is suspect

…Aarav…OP•15h ago

It’s probably an Brocken clock or bad clock Or bad comms With spi/i2c Clear pics of wirring and an explanation to this could help 🤣

DarwinWasWrong•15h ago

I do not believe the OP removed the wires and redid them as requested. the space/time between request and confirmation was too short, resulting in a reset of beliefs, from a watchdog timer

…Aarav…OP•14h ago

True He needs to remove the soldered jumper shorting the +-

DarwinWasWrong•14h ago

there isnt anything on that rail

…Aarav…OP•14h ago

That jumper is just an ticking time bom* For future projects he might forget

DarwinWasWrong•14h ago

Dont be so short. (joke)

…Aarav…OP•13h ago

(I am short) I’m 5 2 (To be fair I’m 13) :uno:

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Continuation of lcd display error

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