draft an InkHUD variant for Elecrow Thinknode M1 (#6473)

Only an initial guess. No hardware here yet for testing. Button assignments are largely placeholder.

Co-authored-by: Ben Meadors <benmmeadors@gmail.com>

variants/ELECROW-ThinkNode-M1/nicheGraphics.h

@@ -0,0 +1,119 @@
+#pragma once
+
+#include "configuration.h"
+
+#ifdef MESHTASTIC_INCLUDE_NICHE_GRAPHICS
+
+// InkHUD-specific components
+// ---------------------------
+#include "graphics/niche/InkHUD/InkHUD.h"
+
+// Applets
+#include "graphics/niche/InkHUD/Applets/User/AllMessage/AllMessageApplet.h"
+#include "graphics/niche/InkHUD/Applets/User/DM/DMApplet.h"
+#include "graphics/niche/InkHUD/Applets/User/Heard/HeardApplet.h"
+#include "graphics/niche/InkHUD/Applets/User/Positions/PositionsApplet.h"
+#include "graphics/niche/InkHUD/Applets/User/RecentsList/RecentsListApplet.h"
+#include "graphics/niche/InkHUD/Applets/User/ThreadedMessage/ThreadedMessageApplet.h"
+
+// Shared NicheGraphics components
+// --------------------------------
+#include "graphics/niche/Drivers/Backlight/LatchingBacklight.h"
+#include "graphics/niche/Drivers/EInk/GDEY0154D67.h"
+#include "graphics/niche/Inputs/TwoButton.h"
+
+#include "graphics/niche/Fonts/FreeSans6pt7b.h"
+#include "graphics/niche/Fonts/FreeSans6pt8bCyrillic.h"
+#include <Fonts/FreeSans9pt7b.h>
+
+void setupNicheGraphics()
+{
+    using namespace NicheGraphics;
+
+    // SPI
+    // -----------------------------
+
+    // For NRF52 platforms, SPI pins are defined in variant.h, not passed to begin()
+    SPI1.begin();
+
+    // Driver
+    // -----------------------------
+
+    // Use E-Ink driver
+    Drivers::EInk *driver = new Drivers::GDEY0154D67; // Todo: confirm display model
+    driver->begin(&SPI1, PIN_EINK_DC, PIN_EINK_CS, PIN_EINK_BUSY, PIN_EINK_RES);
+
+    // InkHUD
+    // ----------------------------
+
+    InkHUD::InkHUD *inkhud = InkHUD::InkHUD::getInstance();
+
+    // Set the driver
+    inkhud->setDriver(driver);
+
+    // Set how many FAST updates per FULL update
+    // Set how unhealthy additional FAST updates beyond this number are
+    // Todo: observe the display's performance in-person and adjust accordingly.
+    // Currently set to the values given by Elecrow for EInkDynamicDisplay.
+    inkhud->setDisplayResilience(10, 1.5);
+
+    // Prepare fonts
+    InkHUD::Applet::fontLarge = InkHUD::AppletFont(FreeSans9pt7b);
+    InkHUD::Applet::fontSmall = InkHUD::AppletFont(FreeSans6pt7b);
+    /*
+    // Font localization demo: Cyrillic
+    InkHUD::Applet::fontSmall = InkHUD::AppletFont(FreeSans6pt8bCyrillic);
+    InkHUD::Applet::fontSmall.addSubstitutionsWin1251();
+    */
+
+    // Customize default settings
+    inkhud->persistence->settings.userTiles.maxCount = 2;              // Two applets side-by-side
+    inkhud->persistence->settings.rotation = 0;                        // To be confirmed?
+    inkhud->persistence->settings.optionalFeatures.batteryIcon = true; // Device definitely has a battery
+
+    // Setup backlight
+    // Note: button mapping for this configured further down
+    Drivers::LatchingBacklight *backlight = Drivers::LatchingBacklight::getInstance();
+    backlight->setPin(PIN_EINK_EN);
+
+    // Pick applets
+    // Note: order of applets determines priority of "auto-show" feature
+    inkhud->addApplet("All Messages", new InkHUD::AllMessageApplet, true, true); // Activated, autoshown
+    inkhud->addApplet("DMs", new InkHUD::DMApplet);                              // Inactive
+    inkhud->addApplet("Channel 0", new InkHUD::ThreadedMessageApplet(0));        // Inactive
+    inkhud->addApplet("Channel 1", new InkHUD::ThreadedMessageApplet(1));        // Inactive
+    inkhud->addApplet("Positions", new InkHUD::PositionsApplet, true);           // Activated
+    inkhud->addApplet("Recents List", new InkHUD::RecentsListApplet);            // Inactive
+    inkhud->addApplet("Heard", new InkHUD::HeardApplet, true, false, 0);         // Activated, no autoshow, default on tile 0
+
+    // Start running InkHUD
+    inkhud->begin();
+
+    // Buttons
+    // --------------------------
+
+    Inputs::TwoButton *buttons = Inputs::TwoButton::getInstance(); // Shared NicheGraphics component
+
+    // As labeled on Elecrow diagram: https://www.elecrow.com/download/product/CIL12901M/ThinkNode-M1_User_Manual.pdf
+    constexpr uint8_t PAGE_TURN_BUTTON = 0;
+    constexpr uint8_t FUNCTION_BUTTON = 1;
+
+    // Setup the main user button
+    buttons->setWiring(PAGE_TURN_BUTTON, PIN_BUTTON2);
+    buttons->setTiming(PAGE_TURN_BUTTON, 50, 500); // Todo: confirm 50ms is adequate debounce
+    buttons->setHandlerShortPress(PAGE_TURN_BUTTON, []() { InkHUD::InkHUD::getInstance()->shortpress(); });
+    buttons->setHandlerLongPress(PAGE_TURN_BUTTON, []() { InkHUD::InkHUD::getInstance()->longpress(); });
+
+    // Setup the aux button
+    // Initial testing only: mapped to the backlight
+    // Todo: additional features
+    buttons->setWiring(FUNCTION_BUTTON, PIN_BUTTON1);
+    buttons->setTiming(FUNCTION_BUTTON, 50, 500); // 500ms before latch
+    buttons->setHandlerDown(FUNCTION_BUTTON, [backlight]() { backlight->peek(); });
+    buttons->setHandlerLongPress(FUNCTION_BUTTON, [backlight]() { backlight->latch(); });
+    buttons->setHandlerShortPress(FUNCTION_BUTTON, [backlight]() { backlight->off(); });
+
+    buttons->start();
+}
+
+#endif

variants/ELECROW-ThinkNode-M1/platformio.ini

@@ -10,6 +10,7 @@ build_flags = ${nrf52840_base.build_flags} -Ivariants/ELECROW-ThinkNode-M1
   -DELECROW_ThinkNode_M1
   -DGPS_POWER_TOGGLE
   -L "${platformio.libdeps_dir}/${this.__env__}/bsec2/src/cortex-m4/fpv4-sp-d16-hard"
+  -DUSE_EINK
   -DEINK_DISPLAY_MODEL=GxEPD2_154_D67
   -DEINK_WIDTH=200
   -DEINK_HEIGHT=200
@@ -27,3 +28,22 @@ lib_deps =
   lewisxhe/PCF8563_Library@^1.0.1
   khoih-prog/nRF52_PWM@^1.0.1
 ;upload_protocol = fs
+
+[env:thinknode_m1-inkhud]
+extends = nrf52840_base, inkhud
+board = ThinkNode-M1
+board_check = true
+debug_tool = jlink
+build_flags = 
+  ${nrf52840_base.build_flags}
+  ${inkhud.build_flags}
+  -I variants/ELECROW-ThinkNode-M1
+  -D ELECROW_ThinkNode_M1
+  -L "${platformio.libdeps_dir}/${this.__env__}/bsec2/src/cortex-m4/fpv4-sp-d16-hard"
+build_src_filter = 
+  ${nrf52_base.build_src_filter} 
+  ${inkhud.build_src_filter}
+lib_deps = 
+  ${inkhud.lib_deps} ; InkHUD libs first, so we get GFXRoot instead of AdafruitGFX
+  ${nrf52840_base.lib_deps}
+  lewisxhe/PCF8563_Library@^1.0.1

variants/ELECROW-ThinkNode-M1/variant.h

@@ -140,8 +140,6 @@ External serial flash WP25R1635FZUIL0
 // Controls power for all peripherals (eink + GPS + LoRa + Sensor)
 #define PIN_POWER_EN (0 + 12)
 
-#define USE_EINK
-
 #define PIN_SPI1_MISO (32 + 7)
 #define PIN_SPI1_MOSI PIN_EINK_MOSI
 #define PIN_SPI1_SCK PIN_EINK_SCLK