Update LiPo examples to use PicoGraphics

micropython/examples/pico_lipo_shim/battery_pico.py

@@ -1,28 +1,30 @@
-# This example shows how to read the voltage from a LiPo battery connected to a Raspberry Pi Pico via our Pico Lipo SHIM...
+# This example shows how to read the voltage from a LiPo battery connected to a Raspberry Pi Pico via our Pico Lipo SHIM
-# ...and uses this reading to calculate how much charge is left in the battery.
+# and uses this reading to calculate how much charge is left in the battery.
-# It then displays the info on the screen of Pico Display or Pico Explorer.
+# It then displays the info on the screen of Pico Display.
 # Remember to save this code as main.py on your Pico if you want it to run automatically!
 
 from machine import ADC, Pin
 import time
 
-# Uncomment one of these lines, depending on what display you have
+# change to DISPLAY_PICO_DISPLAY_2 for Pico Display 2.0
-import picodisplay as display
+from picographics import PicoGraphics, DISPLAY_PICO_DISPLAY
-# import picodisplay2 as display
+display = PicoGraphics(display=DISPLAY_PICO_DISPLAY, rotate=0)
-# import picoexplorer as display
 
-# Set up and initialise display
+display.set_backlight(0.8)
-buf = bytearray(display.get_width() * display.get_height() * 2)
-display.init(buf)
-display.set_backlight(0.8)          # comment out this line if you have a Pico Explorer as it doesn't have a controllable backlight
 
-vsys = ADC(29)              # reads the system input voltage
+vsys = ADC(29)                      # reads the system input voltage
-charging = Pin(24, Pin.IN)  # reading GP24 tells us whether or not USB power is connected
+charging = Pin(24, Pin.IN)          # reading GP24 tells us whether or not USB power is connected
 conversion_factor = 3 * 3.3 / 65535
 
 full_battery = 4.2                  # these are our reference voltages for a full/empty battery, in volts
 empty_battery = 2.8                 # the values could vary by battery size/manufacturer so you might need to adjust them
 
+# Create some pen colours for drawing with
+BLACK = display.create_pen(0, 0, 0)
+GREY = display.create_pen(190, 190, 190)
+GREEN = display.create_pen(0, 255, 0)
+RED = display.create_pen(255, 0, 0)
+
 while True:
     # convert the raw ADC read into a voltage, and then a percentage
     voltage = vsys.read_u16() * conversion_factor
@@ -31,30 +33,25 @@ while True:
         percentage = 100.00
 
     # draw the battery outline
-    display.set_pen(0, 0, 0)
+    display.set_pen(BLACK)
     display.clear()
-    display.set_pen(190, 190, 190)
+    display.set_pen(GREY)
     display.rectangle(0, 0, 220, 135)
     display.rectangle(220, 40, 20, 55)
-    display.set_pen(0, 0, 0)
+    display.set_pen(GREEN)
     display.rectangle(3, 3, 214, 129)
 
     # draw a green box for the battery level
-    display.set_pen(0, 255, 0)
+    display.set_pen(GREEN)
     display.rectangle(5, 5, round(210 / 100 * percentage), 125)
 
     # add text
-    display.set_pen(255, 0, 0)
+    display.set_pen(RED)
     if charging.value() == 1:         # if it's plugged into USB power...
         display.text("Charging!", 15, 55, 240, 4)
     else:                             # if not, display the battery stats
         display.text('{:.2f}'.format(voltage) + "v", 15, 10, 240, 5)
         display.text('{:.0f}%'.format(percentage), 15, 50, 240, 5)
 
-    # uncomment for low battery alarm (Pico Explorer only, you'll need to have GP0 and AUDIO connected with a jumper wire)
-    # display.set_audio_pin(0)
-    # if percentage < 5:               # if the battery is less than 5%
-    #     display.set_tone(262)        # then make an annoying noise
-
     display.update()
     time.sleep(0.5)

micropython/examples/pimoroni_pico_lipo/battery_pico_display.py

@@ -1,21 +1,17 @@
-# This example reads the voltage from a LiPo battery connected to Pimoroni Pico LiPo...
+# This example reads the voltage from a LiPo battery connected to Pimoroni Pico LiPo
-# ...and uses this reading to calculate how much charge is left in the battery.
+# and uses this reading to calculate how much charge is left in the battery.
-# It then displays the info on the screen of Pico Display or Pico Explorer.
+# It then displays the info on the screen of Pico Display (or Pico Display 2.0).
 # With Pimoroni Pico LiPo, you can read the battery percentage while it's charging.
 # Save this code as main.py on your Pico if you want it to run automatically!
 
 from machine import ADC, Pin
 import time
+# change to DISPLAY_PICO_DISPLAY_2 for Pico Display 2.0
+from picographics import PicoGraphics, DISPLAY_PICO_DISPLAY
 
-# Uncomment one of these lines, depending on what display you have
+display = PicoGraphics(display=DISPLAY_PICO_DISPLAY, rotate=0)
-import picodisplay as display
-# import picodisplay2 as display
-# import picoexplorer as display
 
-# Set up and initialise display
+display.set_backlight(0.8)
-buf = bytearray(display.get_width() * display.get_height() * 2)
-display.init(buf)
-display.set_backlight(0.8)          # comment out this line if you have a Pico Explorer, it doesn't have a controllable backlight
 
 vsys = ADC(29)                      # reads the system input voltage
 charging = Pin(24, Pin.IN)          # reading GP24 tells us whether or not USB power is connected
@@ -24,6 +20,12 @@ conversion_factor = 3 * 3.3 / 65535
 full_battery = 4.2                  # reference voltages for a full/empty battery, in volts
 empty_battery = 2.8                 # the values could vary by battery size/manufacturer so you might need to adjust them
 
+# Create some pen colours for drawing with
+BLACK = display.create_pen(0, 0, 0)
+GREY = display.create_pen(190, 190, 190)
+GREEN = display.create_pen(0, 255, 0)
+RED = display.create_pen(255, 0, 0)
+
 while True:
     # convert the raw ADC read into a voltage, and then a percentage
     voltage = vsys.read_u16() * conversion_factor
@@ -32,30 +34,25 @@ while True:
         percentage = 100
 
     # draw the battery outline
-    display.set_pen(0, 0, 0)
+    display.set_pen(BLACK)
     display.clear()
-    display.set_pen(190, 190, 190)
+    display.set_pen(GREY)
     display.rectangle(0, 0, 220, 135)
     display.rectangle(220, 40, 20, 55)
-    display.set_pen(0, 0, 0)
+    display.set_pen(BLACK)
     display.rectangle(3, 3, 214, 129)
 
     # draw a green box for the battery level
-    display.set_pen(0, 255, 0)
+    display.set_pen(GREEN)
     display.rectangle(5, 5, int((210 / 100) * percentage), 125)
 
     # add text
-    display.set_pen(255, 0, 0)
+    display.set_pen(RED)
     if charging.value() == 1:         # if it's plugged into USB power...
         display.text("Charging!", 15, 90, 240, 4)
 
     display.text('{:.2f}'.format(voltage) + "v", 15, 10, 240, 5)
     display.text('{:.0f}%'.format(percentage), 15, 50, 240, 5)
 
-    # uncomment for low battery alarm (Pico Explorer only, you'll need to have GP0 and AUDIO connected with a jumper wire)
-    # display.set_audio_pin(0)
-    # if percentage < 5:               # if the battery is less than 5%
-    #     display.set_tone(262)        # then make an annoying noise
-
     display.update()
     time.sleep(0.5)

micropython/examples/pimoroni_pico_lipo/battery_pico_explorer.py

@@ -0,0 +1,64 @@
+# This example reads the voltage from a LiPo battery connected to Pimoroni Pico LiPo
+# and uses this reading to calculate how much charge is left in the battery.
+# It then displays the info on the screen of Pico Explorer.
+# With Pimoroni Pico LiPo, you can read the battery percentage while it's charging.
+# Save this code as main.py on your Pico if you want it to run automatically!
+
+from machine import ADC, Pin
+import time
+from pimoroni import Buzzer
+from picographics import PicoGraphics, DISPLAY_PICO_EXPLORER
+
+display = PicoGraphics(display=DISPLAY_PICO_EXPLORER)
+
+buzzer = Buzzer(0)
+
+vsys = ADC(29)                      # reads the system input voltage
+charging = Pin(24, Pin.IN)          # reading GP24 tells us whether or not USB power is connected
+conversion_factor = 3 * 3.3 / 65535
+
+full_battery = 4.2                  # reference voltages for a full/empty battery, in volts
+empty_battery = 2.8                 # the values could vary by battery size/manufacturer so you might need to adjust them
+
+# Create some pen colours for drawing with
+BLACK = display.create_pen(0, 0, 0)
+GREY = display.create_pen(190, 190, 190)
+GREEN = display.create_pen(0, 255, 0)
+RED = display.create_pen(255, 0, 0)
+
+while True:
+    buzzer.set_tone(0)
+
+    # convert the raw ADC read into a voltage, and then a percentage
+    voltage = vsys.read_u16() * conversion_factor
+    percentage = 100 * ((voltage - empty_battery) / (full_battery - empty_battery))
+    if percentage > 100:
+        percentage = 100
+
+    # draw the battery outline
+    display.set_pen(BLACK)
+    display.clear()
+    display.set_pen(GREY)
+    display.rectangle(0, 0, 220, 135)
+    display.rectangle(220, 40, 20, 55)
+    display.set_pen(BLACK)
+    display.rectangle(3, 3, 214, 129)
+
+    # draw a green box for the battery level
+    display.set_pen(GREEN)
+    display.rectangle(5, 5, int((210 / 100) * percentage), 125)
+
+    # add text
+    display.set_pen(RED)
+    if charging.value() == 1:         # if it's plugged into USB power...
+        display.text("Charging!", 15, 90, 240, 4)
+
+    display.text('{:.2f}'.format(voltage) + "v", 15, 10, 240, 5)
+    display.text('{:.0f}%'.format(percentage), 15, 50, 240, 5)
+
+    # Low battery alarm! (you'll need to have GP0 and AUDIO connected with a jumper wire)
+    if percentage < 5:              # if the battery is less than 5%
+        buzzer.set_tone(262)        # then make an annoying noise
+
+    display.update()
+    time.sleep(0.5)