Add Lilygo T-Impulse-Plus

boards/t-impulse-plus.json

@@ -0,0 +1,53 @@
+{
+  "build": {
+    "arduino": {
+      "ldscript": "nrf52840_s140_v6.ld"
+    },
+    "core": "nRF5",
+    "cpu": "cortex-m4",
+    "extra_flags": "-DARDUINO_NRF52840_T_IMPULSE_PLUS -DNRF52840_XXAA",
+    "f_cpu": "64000000L",
+    "hwids": [["0x239A", "0x8029"]],
+    "usb_product": "T-Impulse-Plus-nRF52840",
+    "mcu": "nrf52840",
+    "variant": "t-impulse-plus",
+    "variants_dir": "variants",
+    "bsp": {
+      "name": "adafruit"
+    },
+    "softdevice": {
+      "sd_flags": "-DS140",
+      "sd_name": "s140",
+      "sd_version": "6.1.1",
+      "sd_fwid": "0x00B6"
+    },
+    "bootloader": {
+      "settings_addr": "0xFF000"
+    }
+  },
+  "connectivity": ["bluetooth"],
+  "debug": {
+    "jlink_device": "nRF52840_xxAA",
+    "onboard_tools": ["jlink"],
+    "svd_path": "nrf52840.svd"
+  },
+  "frameworks": ["arduino"],
+  "name": "Lilygo T-Impulse-Plus-nRF52840",
+  "upload": {
+    "maximum_ram_size": 248832,
+    "maximum_size": 815104,
+    "require_upload_port": true,
+    "speed": 115200,
+    "protocol": "nrfutil",
+    "protocols": [
+      "jlink",
+      "nrfjprog",
+      "nrfutil",
+      "stlink",
+      "cmsis-dap",
+      "blackmagic"
+    ]
+  },
+  "url": "https://www.lilygo.cc/",
+  "vendor": "Lilygo"
+}

src/Power.cpp

@@ -23,6 +23,7 @@
 #include "main.h"
 #include "meshUtils.h"
 #include "power/PowerHAL.h"
+#include "power/SGM41562.h"
 #include "sleep.h"
 
 #if defined(ARCH_PORTDUINO)
@@ -453,6 +454,10 @@ class AnalogBatteryLevel : public HasBatteryLevel
     /// source
     virtual bool isVbusIn() override
     {
+#ifdef HAS_SGM41562
+        if (sgm41562 && sgm41562->refresh())
+            return sgm41562->isInputPowerGood();
+#endif
 #ifdef EXT_PWR_DETECT
 #if defined(HELTEC_CAPSULE_SENSOR_V3) || defined(HELTEC_SENSOR_HUB)
         // if external powered that pin will be pulled down
@@ -483,6 +488,10 @@ class AnalogBatteryLevel : public HasBatteryLevel
     /// we can't be smart enough to say 'full'?
     virtual bool isCharging() override
     {
+#ifdef HAS_SGM41562
+        if (sgm41562 && sgm41562->refresh())
+            return sgm41562->isCharging();
+#endif
 #if HAS_TELEMETRY && !MESHTASTIC_EXCLUDE_ENVIRONMENTAL_SENSOR && defined(HAS_RAKPROT) && !defined(HAS_PMU)
         if (hasRAK()) {
             return (rak9154Sensor.isCharging()) ? OptTrue : OptFalse;
@@ -697,6 +706,12 @@ bool Power::analogInit()
  */
 bool Power::setup()
 {
+#ifdef HAS_SGM41562
+    // Initialize the charger early so AnalogBatteryLevel can read charging
+    // state from it. The charger does not provide battery voltage / percent —
+    // those still come from the platform ADC via analogInit() below.
+    initSGM41562(SGM41562_WIRE);
+#endif
     bool found = false;
     if (axpChipInit()) {
         found = true;

src/input/HapticFeedback.cpp

@@ -0,0 +1,97 @@
+#include "HapticFeedback.h"
+
+#ifdef HAPTIC_FEEDBACK_PIN
+
+#include <Arduino.h>
+
+#ifdef HAPTIC_FEEDBACK_ACTIVE_LOW
+#define HAPTIC_FEEDBACK_ON_STATE LOW
+#define HAPTIC_FEEDBACK_OFF_STATE HIGH
+#else
+#define HAPTIC_FEEDBACK_ON_STATE HIGH
+#define HAPTIC_FEEDBACK_OFF_STATE LOW
+#endif
+
+HapticFeedback *hapticFeedback = nullptr;
+
+void initHapticFeedback()
+{
+    if (!hapticFeedback)
+        hapticFeedback = new HapticFeedback();
+}
+
+HapticFeedback::HapticFeedback() : concurrency::OSThread("Haptic")
+{
+    pinMode(HAPTIC_FEEDBACK_PIN, OUTPUT);
+    digitalWrite(HAPTIC_FEEDBACK_PIN, HAPTIC_FEEDBACK_OFF_STATE);
+}
+
+void HapticFeedback::motorWrite(bool on)
+{
+    digitalWrite(HAPTIC_FEEDBACK_PIN, on ? HAPTIC_FEEDBACK_ON_STATE : HAPTIC_FEEDBACK_OFF_STATE);
+}
+
+void HapticFeedback::pulse(uint16_t durationMs)
+{
+    motorWrite(true);
+    pulseOffAt = millis() + durationMs;
+    if (pulseOffAt == 0) // 0 is the "no pulse" sentinel
+        pulseOffAt = 1;
+    scheduleNext();
+}
+
+void HapticFeedback::armDelayedPulse(uint16_t delayMs, uint16_t durationMs)
+{
+    delayedPulseAt = millis() + delayMs;
+    if (delayedPulseAt == 0)
+        delayedPulseAt = 1;
+    delayedPulseDuration = durationMs;
+    scheduleNext();
+}
+
+void HapticFeedback::cancelDelayedPulse()
+{
+    delayedPulseAt = 0;
+}
+
+void HapticFeedback::scheduleNext()
+{
+    uint32_t now = millis();
+    uint32_t next = 0;
+    if (pulseOffAt != 0)
+        next = pulseOffAt;
+    if (delayedPulseAt != 0 && (next == 0 || (int32_t)(delayedPulseAt - next) < 0))
+        next = delayedPulseAt;
+    if (next == 0)
+        return;
+    int32_t delay = (int32_t)(next - now);
+    setIntervalFromNow(delay > 0 ? (unsigned long)delay : 0);
+}
+
+int32_t HapticFeedback::runOnce()
+{
+    uint32_t now = millis();
+
+    if (pulseOffAt != 0 && (int32_t)(now - pulseOffAt) >= 0) {
+        motorWrite(false);
+        pulseOffAt = 0;
+    }
+
+    if (delayedPulseAt != 0 && (int32_t)(now - delayedPulseAt) >= 0) {
+        uint16_t dur = delayedPulseDuration;
+        delayedPulseAt = 0;
+        pulse(dur);
+    }
+
+    uint32_t next = 0;
+    if (pulseOffAt != 0)
+        next = pulseOffAt;
+    if (delayedPulseAt != 0 && (next == 0 || (int32_t)(delayedPulseAt - next) < 0))
+        next = delayedPulseAt;
+    if (next == 0)
+        return 60 * 1000;
+    int32_t delay = (int32_t)(next - now);
+    return delay > 0 ? delay : 0;
+}
+
+#endif // HAPTIC_FEEDBACK_PIN

src/input/HapticFeedback.h

@@ -0,0 +1,35 @@
+#pragma once
+
+#include "configuration.h"
+
+#ifdef HAPTIC_FEEDBACK_PIN
+
+#include "concurrency/OSThread.h"
+#include <stdint.h>
+
+// Non-blocking pulses on a GPIO vibration motor. HAPTIC_FEEDBACK_ACTIVE_LOW inverts polarity.
+class HapticFeedback : public concurrency::OSThread
+{
+  public:
+    HapticFeedback();
+    void pulse(uint16_t durationMs = 30);
+    void armDelayedPulse(uint16_t delayMs, uint16_t durationMs = 30);
+    void cancelDelayedPulse();
+
+  protected:
+    int32_t runOnce() override;
+
+  private:
+    uint32_t pulseOffAt = 0;
+    uint32_t delayedPulseAt = 0;
+    uint16_t delayedPulseDuration = 0;
+
+    void motorWrite(bool on);
+    // Reschedule to the soonest pending event so later arms don't clobber earlier wakes.
+    void scheduleNext();
+};
+
+extern HapticFeedback *hapticFeedback;
+void initHapticFeedback();
+
+#endif // HAPTIC_FEEDBACK_PIN

src/input/InputBroker.cpp

@@ -2,6 +2,7 @@
 #include "PowerFSM.h" // needed for event trigger
 #include "configuration.h"
 #include "graphics/Screen.h"
+#include "input/HapticFeedback.h"
 #include "modules/ExternalNotificationModule.h"
 
 #if ARCH_PORTDUINO
@@ -237,6 +238,16 @@ void InputBroker::Init()
         }
         touchBacklightActive = false;
     };
+#endif
+#if defined(HAPTIC_FEEDBACK_PIN)
+    // Blip on touch, second blip when long-press fires (500 ms = touchConfig.longPressTime default).
+    touchConfig.suppressLeadUpSound = true;
+    initHapticFeedback();
+    touchConfig.onPress = []() {
+        hapticFeedback->pulse(80);
+        hapticFeedback->armDelayedPulse(500, 80);
+    };
+    touchConfig.onRelease = []() { hapticFeedback->cancelDelayedPulse(); };
 #endif
     TouchButtonThread->initButton(touchConfig);
 #endif

src/platform/nrf52/architecture.h

@@ -89,6 +89,8 @@
 #define HW_VENDOR meshtastic_HardwareModel_T_ECHO_CARD
 #elif defined(TTGO_T_ECHO_PLUS)
 #define HW_VENDOR meshtastic_HardwareModel_T_ECHO_PLUS
+#elif defined(T_IMPULSE_PLUS)
+#define HW_VENDOR meshtastic_HardwareModel_T_IMPULSE_PLUS
 #elif defined(ELECROW_ThinkNode_M1)
 #define HW_VENDOR meshtastic_HardwareModel_THINKNODE_M1
 #elif defined(ELECROW_ThinkNode_M3)

src/power/SGM41562.cpp

@@ -0,0 +1,109 @@
+#include "SGM41562.h"
+
+#ifdef HAS_SGM41562
+
+#include <Arduino.h>
+
+SGM41562 *sgm41562 = nullptr;
+
+bool initSGM41562(TwoWire &wire)
+{
+    if (sgm41562)
+        return true;
+    sgm41562 = new SGM41562();
+    if (!sgm41562->begin(wire)) {
+        delete sgm41562;
+        sgm41562 = nullptr;
+        return false;
+    }
+    return true;
+}
+
+bool SGM41562::readReg(uint8_t reg, uint8_t &value)
+{
+    wire_->beginTransmission(address_);
+    wire_->write(reg);
+    if (wire_->endTransmission(false) != 0)
+        return false;
+    if (wire_->requestFrom((int)address_, 1) != 1)
+        return false;
+    value = wire_->read();
+    return true;
+}
+
+bool SGM41562::writeReg(uint8_t reg, uint8_t value)
+{
+    wire_->beginTransmission(address_);
+    wire_->write(reg);
+    wire_->write(value);
+    return wire_->endTransmission() == 0;
+}
+
+bool SGM41562::updateReg(uint8_t reg, uint8_t mask, uint8_t value)
+{
+    uint8_t cur;
+    if (!readReg(reg, cur))
+        return false;
+    cur = (cur & ~mask) | (value & mask);
+    return writeReg(reg, cur);
+}
+
+bool SGM41562::begin(TwoWire &wire, uint8_t address)
+{
+    wire_ = &wire;
+    address_ = address;
+
+    uint8_t id;
+    if (!readReg(REG_DEVICE_ID, id)) {
+        LOG_WARN("SGM41562: I2C read failed at 0x%02X", address_);
+        return false;
+    }
+    if (id != DEVICE_ID_EXPECTED) {
+        LOG_WARN("SGM41562: unexpected device ID 0x%02X (expected 0x%02X)", id, DEVICE_ID_EXPECTED);
+        return false;
+    }
+    LOG_INFO("SGM41562: detected at 0x%02X (id 0x%02X)", address_, id);
+
+    // Mirror the vendor reference init sequence: PCB OTP off, NTC off,
+    // watchdog off, charger enabled. These match LilyGo's stock firmware
+    // for the T-Impulse Plus.
+    delay(120);
+    writeReg(REG_SYS_VOLTAGE_REG, 0xB7);
+    writeReg(REG_MISC_OP_CONTROL, 0x40);
+    writeReg(REG_CHARGE_TERM_TIMER, 0x1A);
+    writeReg(REG_POWER_ON_CFG, 0xA4);
+
+    return refresh();
+}
+
+bool SGM41562::refresh()
+{
+    uint32_t now = millis();
+    if (lastRefreshMs_ != 0 && (now - lastRefreshMs_) < 250)
+        return true; // cached
+    lastRefreshMs_ = now == 0 ? 1 : now;
+
+    uint8_t status, fault;
+    if (!readReg(REG_SYSTEM_STATUS, status))
+        return false;
+    if (!readReg(REG_FAULT, fault))
+        return false;
+
+    chargeStatus_ = static_cast<ChargeStatus>((status >> SYS_STATUS_CHRG_SHIFT) & SYS_STATUS_CHRG_MASK);
+    inputPowerGood_ = (status & SYS_STATUS_PG) != 0;
+    thermalReg_ = (status & SYS_STATUS_THERM_REG) != 0;
+    faultMask_ = fault & 0x3F; // bits [7:6] are enter_ship_time config, not faults
+    return true;
+}
+
+bool SGM41562::setChargeEnable(bool enable)
+{
+    return updateReg(REG_POWER_ON_CFG, POWER_ON_CFG_CHG_DISABLE, enable ? 0x00 : POWER_ON_CFG_CHG_DISABLE);
+}
+
+bool SGM41562::setShippingModeEnable(bool enable)
+{
+    return updateReg(REG_MISC_OP_CONTROL, MISC_OP_SHIPPING_MODE, enable ? MISC_OP_SHIPPING_MODE : 0x00);
+}
+
+#endif // HAS_SGM41562