Add Elecrow ThinkNode M8 board support (thinknode_m8) (#11226)

* Add Elecrow ThinkNode M8 variant scaffold (thinknode_m8) nRF52840 + SX1262 + 2.4" e-paper + ATGM336H-5NR32 GPS. All pins resolved from ThinkNode_M8_V0.3.sch; cross-checked against meshtastic/firmware#9181 (Elecrow V0.1 reference). Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com> * Add Elecrow ThinkNode M8 board support (nRF52840/SX1262, 1.54in e-ink, ATGM336H GNSS, SC7A20, EC04 encoder) * Address review: keep the stored backlight level out of blanking, match only the SC7A20 WHO_AM_I byte, and transfer detents atomically * Use std::atomic for the press-and-turn detent counter so native builds compile * Drop the ThinkNode M8 LED_BUILTIN redefinition that warned on every translation unit --------- Co-authored-by: claude[bot] <41898282+claude[bot]@users.noreply.github.com> Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
2026-07-30 15:59:35 +00:00
parent 84322af4e0
commit 597f6767b5
22 changed files with 641 additions and 33 deletions
@@ -0,0 +1,71 @@
+#include "graphics/Backlight.h"
+
+#if HAS_PWM_BACKLIGHT
+
+#include "mesh/NodeDB.h"
+
+namespace graphics
+{
+namespace
+{
+bool pinConfigured = false;
+
+// Level restored when the backlight is switched back on after being toggled off.
+uint8_t lastOnLevel = PWM_BACKLIGHT_DEFAULT;
+
+void drive(uint8_t level)
+{
+    if (!pinConfigured) {
+        pinMode(PIN_PWM_BACKLIGHT, OUTPUT);
+        pinConfigured = true;
+    }
+    analogWrite(PIN_PWM_BACKLIGHT, level);
+}
+} // namespace
+
+void backlightSet(uint8_t level)
+{
+    if (level > 0)
+        lastOnLevel = level;
+    uiconfig.screen_brightness = level;
+    drive(level);
+}
+
+uint8_t backlightGet()
+{
+    return uiconfig.screen_brightness;
+}
+
+void backlightOn()
+{
+    drive(uiconfig.screen_brightness);
+}
+
+void backlightOff()
+{
+    drive(0);
+}
+
+void backlightToggle()
+{
+    backlightSet(uiconfig.screen_brightness > 0 ? 0 : lastOnLevel);
+}
+
+void backlightStepUp()
+{
+    uint16_t raised = (uint16_t)uiconfig.screen_brightness + PWM_BACKLIGHT_STEP;
+    backlightSet(raised > PWM_BACKLIGHT_MAX ? PWM_BACKLIGHT_MAX : (uint8_t)raised);
+}
+
+void backlightStepDown()
+{
+    // Leave an off backlight off; otherwise clamp at the minimum.
+    if (uiconfig.screen_brightness == 0)
+        return;
+    backlightSet(uiconfig.screen_brightness <= PWM_BACKLIGHT_MIN + PWM_BACKLIGHT_STEP
+                     ? PWM_BACKLIGHT_MIN
+                     : uiconfig.screen_brightness - PWM_BACKLIGHT_STEP);
+}
+} // namespace graphics
+
+#endif // HAS_PWM_BACKLIGHT