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feat(eink): full refresh interval setting in Settings › Display

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Add "Full rfsh" setting (e-ink only) with options off/5/10/20/30
partial refreshes between full refreshes. Prevents ghosting on panels
that accumulate artifacts after many partial updates.

GxEPDDisplay counts partial refreshes and calls display.display(false)
every N frames when the interval is set. Persisted in DataStore and
applied at startup via applyFullRefreshInterval().

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
Jakub
2026-05-24 10:22:03 +02:00
parent 8012278483
commit a6bf3ee08f
8 changed files with 54 additions and 1 deletions
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1
src/helpers/ui/DisplayDriver.h
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@@ -228,5 +228,6 @@ public:
virtual void setBrightness(uint8_t level) { } // level 0-4 (min to max), no-op default
virtual void setDisplayRotation(uint8_t rot) { } // 0-3, no-op for fixed-orientation displays
virtual void setFullRefreshInterval(uint8_t n) { } // e-ink: do full refresh every n partial refreshes (0=never)
virtual void endFrame() = 0;
};

7
src/helpers/ui/GxEPDDisplay.cpp
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@@ -195,7 +195,12 @@ void GxEPDDisplay::setDisplayRotation(uint8_t rot) {
void GxEPDDisplay::endFrame() {
uint32_t crc = display_crc.finalize();
if (crc != last_display_crc_value) {
display.display(true);
bool partial = true;
if (_full_refresh_interval > 0 && ++_partial_count >= _full_refresh_interval) {
partial = false;
_partial_count = 0;
}
display.display(partial);
last_display_crc_value = crc;
}
}

3
src/helpers/ui/GxEPDDisplay.h
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@@ -54,6 +54,8 @@ class GxEPDDisplay : public DisplayDriver {
CRC32 display_crc;
int last_display_crc_value = 0;
int _text_sz = 1;
uint8_t _full_refresh_interval = 0; // 0=never, N=full refresh every N partial refreshes
uint8_t _partial_count = 0;
public:
#if defined(EINK_DISPLAY_MODEL)
@@ -100,5 +102,6 @@ public:
void drawXbm(int x, int y, const uint8_t* bits, int w, int h) override;
uint16_t getTextWidth(const char* str) override;
void setDisplayRotation(uint8_t rot) override;
void setFullRefreshInterval(uint8_t n) override { _full_refresh_interval = n; _partial_count = 0; }
void endFrame() override;
};