BatteryManageR: add has_battery()

CHANGELOG.md

@@ -1,9 +1,9 @@
-0.7.2
+0.8.0
 =====
 
 Builtin Apps:
 - Launcher: fit at least 3 apps per row on a 240px display
-- OSUpdate: replace "force update" checkbox with improved button labels
+- OSUpdate: replace 'force update' checkbox with improved button labels
 
 Frameworks:
 - SDCard: add support for SDIO/SD/MMC mode
@@ -11,7 +11,7 @@ Frameworks:
 
 OS:
 - Scale MicroPythonOS boot logo down if necessary
-- Additional board support: MaTouch ESP32-S3 SPI IPS 2.8" with Camera OV3660
+- Add board support: MaTouch ESP32-S3 SPI IPS 2.8' with Camera OV3660
 
 0.7.1
 =====

internal_filesystem/lib/mpos/battery_manager.py

@@ -67,6 +67,16 @@ class BatteryManager:
         initial_adc_value = BatteryManager.read_raw_adc()
         print(f"Reading ADC at init to fill cache: {initial_adc_value} => {BatteryManager.read_battery_voltage(raw_adc_value=initial_adc_value)}V => {BatteryManager.get_battery_percentage(raw_adc_value=initial_adc_value)}%")
 
+    @staticmethod
+    def has_battery():
+        """
+        Check if battery monitoring is initialized.
+
+        Returns:
+            bool: True if init_adc() was called, False otherwise
+        """
+        return _adc_pin is not None
+
     @staticmethod
     def read_raw_adc(force_refresh=False):
         """

internal_filesystem/lib/mpos/board/matouch_esp32_s3_2_8.py

@@ -82,7 +82,7 @@ try:
     i2c_bus = i2c.I2C.Bus(host=0, scl=38, sda=39)
     import mpos.indev.gt911 as gt911
     touch_dev = i2c.I2C.Device(bus=i2c_bus, dev_id=gt911.I2C_ADDR, reg_bits=gt911.BITS)
-    indev = gt911.GT911(touch_dev, reset_pin=1, interrupt_pin=40, debug=True) # remove debug because it's slower
+    indev = gt911.GT911(touch_dev, reset_pin=1, interrupt_pin=40, debug=False) # debug makes it slower
     from mpos import InputManager
     InputManager.register_indev(indev)
 except Exception as e:

internal_filesystem/lib/mpos/ui/camera_activity.py

@@ -92,7 +92,6 @@ class CameraActivity(Activity):
         snap_label.set_text(lv.SYMBOL.OK)
         snap_label.center()
 
-
         self.status_label_cont = lv.obj(self.main_screen)
         width = mpos_ui.DisplayMetrics.pct_of_width(70)
         height = mpos_ui.DisplayMetrics.pct_of_width(60)
@@ -356,4 +355,3 @@ class CameraActivity(Activity):
         if buffer.startswith(bom):
             return buffer[3:]
         return buffer
-