tlora-t3s3-epaper: e-ink startup and build cleanup (#10973)

* T3s3 Eink

* Update SerialConsole.cpp

* Update

* Update SerialConsole.h

* Update EInkDisplay2.cpp

src/FSCommon.h

@@ -64,4 +64,10 @@ bool fsFormat();
 std::vector<meshtastic_FileInfo> getFiles(const char *dirname, uint8_t levels, size_t maxCount = 64, bool *wasLimited = nullptr);
 void listDir(const char *dirname, uint8_t levels, bool del = false);
 void rmDir(const char *dirname);
-void setupSDCard();
+void setupSDCard();
+
+#if defined(HAS_SDCARD) && !defined(SDCARD_USE_SOFT_SPI) && defined(SDCARD_USE_SPI1)
+#include <SPI.h>
+// HSPI bus set up by setupSDCard(). Reuse this for other devices on the same bus.
+extern SPIClass SPI_HSPI;
+#endif

src/graphics/EInkDisplay2.cpp

@@ -2,6 +2,7 @@
 
 #if defined(USE_EINK) && !defined(USE_EINK_PARALLELDISPLAY)
 #include "EInkDisplay2.h"
+#include "FSCommon.h"
 #include "SPILock.h"
 #include "main.h"
 #include <SPI.h>
@@ -214,9 +215,23 @@ bool EInkDisplay::connect()
     defined(CROWPANEL_ESP32S3_5_EPAPER) || defined(CROWPANEL_ESP32S3_4_EPAPER) || defined(CROWPANEL_ESP32S3_2_EPAPER) ||         \
     defined(MINI_EPAPER_S3)
     {
+#if defined(TLORA_T3S3_EPAPER)
+        // T3-S3 shares HSPI with the SD card; preconfigure the panel control pins.
+        hspi = &SPI_HSPI;
+        pinMode(PIN_EINK_CS, OUTPUT);
+        pinMode(PIN_EINK_DC, OUTPUT);
+        pinMode(PIN_EINK_BUSY, INPUT);
+        if (PIN_EINK_RES >= 0) {
+            pinMode(PIN_EINK_RES, OUTPUT);
+            digitalWrite(PIN_EINK_RES, HIGH);
+        }
+        digitalWrite(PIN_EINK_CS, HIGH);
+        digitalWrite(PIN_EINK_DC, HIGH);
+#else
         // Start HSPI
         hspi = new SPIClass(HSPI);
         hspi->begin(PIN_EINK_SCLK, -1, PIN_EINK_MOSI, PIN_EINK_CS); // SCLK, MISO, MOSI, SS
+#endif
         // VExt already enabled in setup()
         // RTC GPIO hold disabled in setup()
 

src/graphics/niche/InkHUD/PlatformioConfig.ini

@@ -1,7 +1,22 @@
 [inkhud]
-build_src_filter = 
+build_src_filter =
   +<graphics/niche/>; Include the nicheGraphics directory
-build_flags = 
+  -<graphics/draw/> ; BaseUI renderer stack is disabled for InkHUD
+  -<graphics/fonts/> ; InkHUD uses GFX_Root fonts instead of BaseUI font tables
+  -<graphics/EInkDisplay2.cpp> ; InkHUD drives e-ink through niche drivers
+  -<graphics/EInkDynamicDisplay.cpp>
+  -<graphics/EInkParallelDisplay.cpp>
+  -<graphics/EmoteRenderer.cpp>
+  -<graphics/emotes.cpp>
+  -<graphics/Panel_sdl.cpp>
+  -<graphics/ScreenGlobals.cpp>
+  -<graphics/SharedUIDisplay.cpp>
+  -<graphics/TFTColorRegions.cpp>
+  -<graphics/TFTDisplay.cpp>
+  -<graphics/tftSetup.cpp>
+  -<graphics/TimeFormatters.cpp>
+  -<graphics/VirtualKeyboard.cpp>
+build_flags =
   -D MESHTASTIC_INCLUDE_NICHE_GRAPHICS ; Use NicheGraphics
   -D MESHTASTIC_INCLUDE_INKHUD ; Use InkHUD (a NicheGraphics UI)
   -D MESHTASTIC_EXCLUDE_SCREEN ; Suppress default Screen class