Drive 1024×600 Pixels via I2C with an ATtiny85 https://hackaday.com/2026/01/08/drive-1024x600-pixels-via-i2c-with-an-attiny85/
#ATtinyHacks #Microcontrollers #ATTiny85 #Graphicslibrary #LT7683 #RA8875 #TFTdisplay

I need some help please Mastodon, I'm having trouble getting text (or anything) to appear on my #RA8875 display when using 6800 8 bit parallel bus.
datasheet is here - https://www.buydisplay.com/download/manual/ER-TFT043A4-3-4267_Datasheet.pdf

all I get is a blank screen and I've tried multiple initialisation and text send methods.

My EhBASIC code is here - https://github.com/TechPaula/PC6502/blob/main/Software/BASIC/VIA_DISP_TEST.BAS

I'll paste the console output of this code on the thread here.

1/?

#RA8875 #Teensy
BuyDisplayのRA8875ドライバにTeensy/Uno対応の記載があるな

Teensy 4.0
https://www.switch-science.com/catalog/5877/

#RA8875

すごいな
Adafruitのドライバはbuggyとソースコメントに書いている
そうなのか

Adafruit_RA8875のソースを参考に、より洗練されたドライバをBuyDisplayで実装
ということか

#RA8875 #electriccircuit #library
RA8875: 4" to 8" (WQVGA, WVGA, Multi-Touch, Keypad)
https://os.mbed.com/components/RA8875-Based-Display/

mbedのRA8875ライブラリと回路と実装例

#RA8875
MOUSERにはICそのものはない
AdafruitのDriver Boardだけ見つかる

#RA8875 #adafruit
AdafruitのRA8875ライブラリ
Adafruit_GFXクラスからの継承でAdafruit_RA8875を作成

自作するとしたら、どこから手を付けるかな

#ra8875
RA8875 Driver Board

Driver Board自体が駆動の機能を有していて、SPIなど簡易なコマンドで制御

ArduinoやRaspberry Piで動作する
これを高性能のPIC32MZにする必要性は今のところないか

#PIC32MX #ra8875
PIC32MZ interfacing RA8875 LCD display controller
https://www.microchip.com/forums/m908945.aspx

PIC32MZでの駆動例
RA8875を駆動するのはPIC32MXではダメなのかな
5年前の内容
PIC32MZでもECとEFの違いではまる、とも

#RA8875 #RAiO
AdafruitRA8875 Library Documentation
https://circuitpython.readthedocs.io/_/downloads/ra8875/en/latest/pdf/
Mar 19, 2021
- Simple test
- Bitmap test

#RA8875 #RAiO
No RA8875 display output on Raspberry Pi
https://github.com/adafruit/Adafruit_Python_PureIO/issues/19
> Ok, I figured out the issue. With the way we were doing it before, we were telling SPI to not mess with the CS line and the new PureIO is automatically messing with the CS line.