Guru
Joined: 31/07/2019
Location: AustraliaPosts: 654
| Posted: 10:15pm 01 Apr 2024 |
For a calculator/portable instrument display type device, only a I2C keypad is needed at this stage so I will stay with that, maybe add USB i/o in future.
One aim is to keep the size down, the 3.5 fits -just- with keypad into a jiffy box and it is hand held size. There is also a smaller screen 3.2 inch 240x320 which might have better drivers but has less resolution. I wanted to have the display readable at say a meter distance, meaning a moderate size font, but the display software is a bit limiting. I will check the STMF4 board, any more details ?