From aacbef56c6d3bd0ba61af84fa1536e4a1f6787fc Mon Sep 17 00:00:00 2001
From: helgibbons <50950368+helgibbons@users.noreply.github.com>
Date: Tue, 21 Jun 2022 10:40:58 +0100
Subject: [PATCH] Add boot button to button test, new LED PWM example

---
 micropython/examples/tufty2040/button_test.py | 14 ++++++++++++--
 micropython/examples/tufty2040/led_pwm.py     | 17 +++++++++++++++++
 2 files changed, 29 insertions(+), 2 deletions(-)
 create mode 100644 micropython/examples/tufty2040/led_pwm.py

diff --git a/micropython/examples/tufty2040/button_test.py b/micropython/examples/tufty2040/button_test.py
index e17ef0cc..69d5465a 100644
--- a/micropython/examples/tufty2040/button_test.py
+++ b/micropython/examples/tufty2040/button_test.py
@@ -14,6 +14,7 @@ button_b = Button(8, invert=False)
 button_c = Button(9, invert=False)
 button_up = Button(22, invert=False)
 button_down = Button(6, invert=False)
+button_boot = Button(23, invert=True)
 
 WHITE = display.create_pen(255, 255, 255)
 BLACK = display.create_pen(0, 0, 0)
@@ -22,6 +23,7 @@ MAGENTA = display.create_pen(255, 0, 255)
 YELLOW = display.create_pen(255, 255, 0)
 RED = display.create_pen(255, 0, 0)
 GREEN = display.create_pen(0, 255, 0)
+BLUE = display.create_pen(0, 0, 255)
 
 WIDTH, HEIGHT = display.get_bounds()
 
@@ -54,7 +56,7 @@ while True:
         display.set_pen(BLACK)
         display.clear()
         display.set_pen(YELLOW)
-        display.text("Button up pressed", 10, 10, WIDTH - 10, 3)
+        display.text("Button UP pressed", 10, 10, WIDTH - 10, 3)
         display.update()
         time.sleep(1)
 
@@ -62,7 +64,15 @@ while True:
         display.set_pen(BLACK)
         display.clear()
         display.set_pen(GREEN)
-        display.text("Button down pressed", 10, 10, WIDTH - 10, 3)
+        display.text("Button DOWN pressed", 10, 10, WIDTH - 10, 3)
+        display.update()
+        time.sleep(1)
+
+    elif button_boot.is_pressed:
+        display.set_pen(BLACK)
+        display.clear()
+        display.set_pen(BLUE)
+        display.text("Button BOOT/USR pressed", 10, 10, WIDTH - 10, 3)
         display.update()
         time.sleep(1)
 
diff --git a/micropython/examples/tufty2040/led_pwm.py b/micropython/examples/tufty2040/led_pwm.py
new file mode 100644
index 00000000..23614bde
--- /dev/null
+++ b/micropython/examples/tufty2040/led_pwm.py
@@ -0,0 +1,17 @@
+# This example shows how you can control the brightness of Tufty's activity LED, using PWM.
+# More about PWM / frequency / duty cycle here: https://projects.raspberrypi.org/en/projects/getting-started-with-the-pico/7
+
+from machine import Pin, PWM
+from time import sleep
+
+pwm = PWM(Pin(25))
+
+pwm.freq(1000)
+
+while True:
+    for duty in range(65025):
+        pwm.duty_u16(duty)
+        sleep(0.0001)
+    for duty in range(65025, 0, -1):
+        pwm.duty_u16(duty)
+        sleep(0.0001)