Add original LilyGO T5 E-Paper S3 Pro (H752) board support#16
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Adds the pre-"H752-01" revision of the LilyGO T5 E-Paper S3 Pro (v1.0-240810, 4.7" ED047TC1, 960x540). It has no PCA9535/TPS65185, so it can't use epdiy's epd_board_v7 path and instead drives the panel with the vendored FastEPD library. All of it is behind a new model + display-backend Kconfig (DRAFTLING_MODEL_LILYGO_T5_EPD_S3_PRO_H752 / DRAFTLING_DISPLAY_H752_EPD), selected only by sdkconfig.h752, so the existing boards are unaffected. Hardware-verified on the board. - FastEPD display backend (components/fastepd vendored + display_h752.cpp): full 960x540 1-bit plane, partialUpdate for flicker-free local refresh on typing/deletes, full refresh on demand / every N partials. Includes a fix for a FastEPD bbepPartialUpdate DMA ping-pong bug (clear BOTH neutral row halves) that otherwise leaves full-height vertical streaks under edited text. - Touch: GT911 calibrated for this panel (reports 540x960 portrait; swap_xy + mirror_x). Front capacitive touch-key wired via a new touchscreen button callback to act as Back/Esc. Coexists with the existing GT911 address-drift recovery. - Power/keys: GPIO48 side key = Menu (injects F1). GPIO48 is not an RTC IO on the ESP32-S3, so standby uses light-sleep + gpio_wakeup + esp_restart instead of EXT0 deep sleep. - Backlight: H752 added to the <=5% extra-dim front-light option. - Battery indicator: on H752 only, drop the periodic 5 s battery-label timer (each rewrite drove a FastEPD refresh -> visible ghosting) in favour of a pull model that refreshes the label at natural redraw points and only when the value changed. Gated on the H752 model; every other board keeps the original timer unchanged. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Owner
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the two files |
Owner
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Also, README does not mention the H752 model |
Owner
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when compiloing for non-H752 Lilygo, this function should not be declared: main/main.cpp:649:13: warning: 'void pre_sleep_h752_deinit()' defined but not used |
Owner
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Was it necessary to add FastEPD? Can't it be done with the existing EPDIY driver? |
Owner
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superceeded by #18 |
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What this adds
Support for the original LilyGO T5 E-Paper S3 Pro — the H752 / v1.0-240810 revision (4.7" ED047TC1, 960×540). This pre-"H752-01" board has no PCA9535/TPS65185, so it can't use epdiy's
epd_board_v7path and instead drives the panel with the vendored FastEPD library. Everything is behind a new model + display-backend Kconfig (DRAFTLING_MODEL_LILYGO_T5_EPD_S3_PRO_H752/DRAFTLING_DISPLAY_H752_EPD), selected only bysdkconfig.h752— existing boards are unaffected. Hardware-verified on the board (ink, partial refresh, touch, side-key menu, power-off).components/fastepdvendored +display_h752.cpp): full 960×540 1-bit plane,partialUpdatefor flicker-free local refresh on typing/deletes, full refresh on demand / every N partials. Includes a fix for a FastEPDbbepPartialUpdateDMA ping-pong bug (clear both neutral row halves) that otherwise leaves full-height vertical streaks under edited text.gpio_wakeup+esp_restartinstead of EXT0 deep sleep.Build-verified on ESP-IDF 6.1 with
sdkconfig.h752(FastEPD, unlike epdiy, builds on IDF 6.x). Rebased onto currentmain; the only conflicts were trivial "keep both" against #11's GT911/wake changes. Split out of #14 per maintainer request.Known issue (separate, does not block display/input)
A BLE HID
esp_hidh_dev_openwatchdog →LoadProhibitedcrash after a connect timeout exists on this board path; tracked separately. #13's conn-param fix may help and is independent of this diff.