Implement full SSD1306 OLED display support: - Splash screen on boot (1.5s) with project name, version, board - Dashboard showing radio state, config, counters, RSSI/SNR - RSSI history sparkline (64-sample ring buffer, 2px-wide bars) - DisplayOn/DisplayOff host commands routed via dedicated channel - Pure render functions against generic DrawTarget (no hardware coupling) - Display on/off control bypasses radio task entirely Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
ROM functions
Files in the rom subdirectories are taken from esp-idf
- DON'T include any
*newlib*functions - systimer, wdt and mbedtls shouldn't be included
- make sure to align the version you take the files from with esp-wifi-sys - NEVER randomly sync the files with other versions
- some additional functions are needed from ROM - see
additional.ld(these are usually defined in the*newlib*files)