573 questions
0
votes
0
answers
18
views
How can I controll a LCD2004 using a Pi Pico2W
I had my LCD2004 with an PCF8574(T) I2C working using a normal Pi Pico.
Since i want to use Wifi-Functionality with my project I swapped over to a Pi Pico2W but i can't get the LCD to work using the ...
0
votes
0
answers
92
views
Bitbang 24-bit RGB LCD driver for RP2040
I'm trying to write bitbang 24-bit RGB LCD driver to display 240x320 with RGB, 3 color channels.
My hardware has SDIO port that is emulated by PIO program so, no more pins available for LCD parellel ...
- 43
0
votes
0
answers
20
views
How can I connect an LCD to an Up Squared Board using spidev?
Original Board: Raspberry Pi 4 model B
New Board: Up Squared 7100
LCD: NHD-PCB12832A1Zrev2
import RPi.GPIO as GPIO
from ascii_values import ASCII168
import icon_manager
# Mapping based on BCM (...
- 1
0
votes
0
answers
164
views
Display is flickering when we refresh the screen
Description
We are using ESP32S3R8 and LVGL v8.3 for our project. SDK is ESP_IDF v5.3.2.
Display sometimes shows flickering whenever lvgl flush the buffer.
Double buffer is enabled
bounce buffer size ...
0
votes
0
answers
103
views
Having Trouble Getting CAN-bus Data to Display on an LCD
I am using an Arduino Uno with a SEEED CAN-bus shield and a 4x20 LCD with the Adafruit I2C backpack. I'm trying to make the Uno recieve several different messages via CAN, then display the data it ...
0
votes
1
answer
95
views
LVGL9-The color setting is incorrect
this is my code
driver.c
void lcd_set_color(uint16_t color)
{
uint16_t color_swap = swap_high_low(color);
// 分配内存 这里分配了液晶屏一行数据需要的大小
uint16_t *buffer = (uint16_t *)heap_caps_malloc(...
- 1
1
vote
0
answers
36
views
Characters ��� appears when load turns on
I'm making an automatic watering system with an LCD that shows moisture level from 0 to 100. Whenever the pump turns on the output on the serial monitor turns into ��� and other random characters. ...
- 21
0
votes
0
answers
66
views
Raspberry pi pico lcd screen wont work using the official raspberry pi tutorial book (LCD-1602)
I followed the official Raspberry Pi Pico book and copied the code. I checked all the wires and they are connected correctly. If I runt he code there is no text being displayed the screen just goes on ...
- 11
1
vote
0
answers
617
views
ESP32-S3-geek LCD screen programming
I am trying to program the LCD screen of my ESP32-S3-GEEK, which has an integrated display. Unfortunately, I'm unable to get it to work even though I've followed the documentation closely. When I ...
- 11
-2
votes
1
answer
81
views
My Arduino code stops working when i try to manipulate the ports instead of using pinMode() and digitalWrite()
The uncommented code works perfectly fine, but as you can see i have commented all the port related lines which i think should do the equivalent as the uncommented ones, but when i uncomment those and ...
- 1
1
vote
1
answer
51
views
4-BiT-Mode LCD doesn't show anything
Recently, I was making a driver for a 2*16 LCD to interface with "Atmega32", which works in 8-bit and 4-bit modes.
The 8-bit works fine but the 4-bit doesn't show any text >:(.
I am using ...
- 11
-1
votes
2
answers
142
views
EIO problem with 2004 i2c lcd and raspberry pi pico [duplicate]
I have an raspberry pi pico and a 20x4 I2C lcd. But when I try to connect to the lcd, it raises this error:
I checked my wires many times. And I connect and disconnected them to much. but none of this ...
- 1
-1
votes
1
answer
393
views
OSError [Errno 5] EIO with connecting to an I2C 2004 char LCD with raspberry pi pico
I have an 20x4 char LCD with an I2C convertor board. But when I'm connecting to it(I2C board), raspberry pi pico raises:
OSError: [Errno 5] EIO
I've double checked my wires - and my code too. and I've ...
- 1
0
votes
1
answer
402
views
Drawing an image with ILI9341 Display And STM32F103C8T6
[pic1]
[pic2]
i am trying to draw this image in the ili9341 diaplay, but as you can see the colors are broken and i dont know how to fix.
also this is the C array of the image: link
i generated the ...
- 1
0
votes
0
answers
41
views
Nothing Displaying on my LCD screen: Nucleo F401RE
Coding in arm keil studio, my code is correct because it is built. But nothing is displaying to my LCD screen and I'm trying to figure out my problem. The only thing the LCD is doing is lighting up ...
- 1