Continuation of lcd display error

This is an continuation of @Graphite s problem

31 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•2mo 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•2mo 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•2mo 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•2mo 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•2mo ago

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

AnonEngineering•2mo ago

what is this all about?

. . . AARAV . . .OP•2mo ago

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

. . . AARAV . . .OP•2mo ago

@AnonEngineering

Fireguy9143•2mo 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•2mo ago

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

Fireguy9143•2mo ago

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

. . . AARAV . . .OP•2mo ago

It’s very interesting…

DarwinWasWrong•2mo ago

The OP "confirmed" the wiring.

Fireguy9143•2mo ago

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

. . . AARAV . . .OP•2mo ago

Is it hardware or software?

AnonEngineering•2mo ago

my bet is wiring of some sort

. . . AARAV . . .OP•2mo ago

K OP has tried multiple different codes

AnonEngineering•2mo ago

that whole reset business is suspect

. . . AARAV . . .OP•2mo 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•2mo 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•2mo ago

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

DarwinWasWrong•2mo ago

there isnt anything on that rail

. . . AARAV . . .OP•2mo ago

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

DarwinWasWrong•2mo ago

Dont be so short. (joke)

. . . AARAV . . .OP•2mo ago

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

Graphite•2mo ago

I SOLVED IT IM SO DUMB DUDE I JUST HAD TO BRING THE LOGIC PINS DOWN TO 3V3 I DIDN'T DO THAT APPARENTLY??? I WAS CONVINCED I DID Even tho i figured it myself, you were a huge help dude! Kudos for knowing so much about this stuff at 13 I started programming around that age but working with electronics is a whole another beast Thank you everyone for the ideas, im js glad to be done w this bs

. . . AARAV . . .OP•2mo ago

👍 :puppet_4: Esp 32 does that automatically jk Your welcome

AnonEngineering•2mo ago

another case where having level shifters on hand would have helped 😉

. . . AARAV . . .OP•2mo ago

the pots that I think @DarwinWasWrong said earlier would also have worked

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Continuation of lcd display error

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