Display Rotation Issues (Legacy / Hardware Limitation) #2
Description
We implemented 90° rotation, but encountered hardware limitations with the CO5300 driver/panel.
Problem:
When rotating 90° (MADCTL 0x22), a thin green strip appears at the bottom of the display.
Cause:
Likely a mismatch between the CO5300's internal 480x480 panel and our 466x466 display window when row/col swap (MV) is active. The driver's writeAddrWindow offsets may need custom adjustment for rotated modes.
Status:
- 0°: Works perfectly.
- 90°: Functional (touch & map correct), but has visual green artifact at bottom.
- 180°/270°: Not supported by hardware (mirroring issues).
Tried fixes:
fillScreen after rotation, custom constructor offsets (made it worse), various MADCTL bits.
Future fix ideas:
Modify Arduino_CO5300 driver to handle rotation offsets dynamically, or use LVGL software rotation.