diff --git a/micropython/examples/inky_frame/button_demo.py b/micropython/examples/inky_frame/button_demo.py new file mode 100644 index 00000000..42f9bba9 --- /dev/null +++ b/micropython/examples/inky_frame/button_demo.py @@ -0,0 +1,85 @@ +# This example shows you a simple, non-interrupt way of reading Inky Frame's buttons with a loop that checks to see if buttons are pressed. + +from pimoroni import ShiftRegister +from picographics import PicoGraphics, DISPLAY_INKY_FRAME as DISPLAY # 5.7" +# from picographics import PicoGraphics, DISPLAY_INKY_FRAME_4 as DISPLAY # 4.0" +from machine import Pin + +display = PicoGraphics(display=DISPLAY) + +display.set_font("bitmap8") + +# Inky Frame uses a shift register to read the buttons +SR_CLOCK = 8 +SR_LATCH = 9 +SR_OUT = 10 + +sr = ShiftRegister(SR_CLOCK, SR_LATCH, SR_OUT) + +# set up the button LEDs +button_a_led = Pin(11, Pin.OUT) +button_b_led = Pin(12, Pin.OUT) +button_c_led = Pin(13, Pin.OUT) +button_d_led = Pin(14, Pin.OUT) +button_e_led = Pin(15, Pin.OUT) + + +# a handy function we can call to clear the screen +# display.set_pen(1) is white and display.set_pen(0) is black +def clear(): + display.set_pen(1) + display.clear() + + +# set up +clear() +display.set_pen(0) +display.text("Press any button!", 10, 10, scale=4) +display.update() + +while True: + button_a_led.off() + button_b_led.off() + button_c_led.off() + button_d_led.off() + button_e_led.off() + + # read the shift register + # we can tell which button has been pressed by checking if a specific bit is 0 or 1 + result = sr.read() + button_a = sr[7] + button_b = sr[6] + button_c = sr[5] + button_d = sr[4] + button_e = sr[3] + + if button_a == 1: # if a button press is detected then... + button_a_led.on() + clear() # clear to white + display.set_pen(4) # change the pen colour + display.text("Button A pressed", 10, 10, scale=4) # display some text on the screen + display.update() # update the display + elif button_b == 1: + button_b_led.on() + clear() + display.set_pen(6) + display.text("Button B pressed", 10, 50, scale=4) + display.update() + elif button_c == 1: + button_c_led.on() + clear() + display.set_pen(5) + display.text("Button C pressed", 10, 90, scale=4) + display.update() + elif button_d == 1: + button_d_led.on() + clear() + display.set_pen(2) + display.text("Button D pressed", 10, 130, scale=4) + display.update() + elif button_e == 1: + button_e_led.on() + clear() + display.set_pen(3) + display.text("Button E pressed", 10, 170, scale=4) + display.update() diff --git a/micropython/examples/inky_frame/button_test.py b/micropython/examples/inky_frame/button_test.py index 034d6021..62c44db2 100644 --- a/micropython/examples/inky_frame/button_test.py +++ b/micropython/examples/inky_frame/button_test.py @@ -1,12 +1,10 @@ -# This example shows you a simple, non-interrupt way of reading Inky Frame's buttons with a loop that checks to see if buttons are pressed. +# This example allows you to test Inky Frame's buttons +# It does not update the screen. from pimoroni import ShiftRegister -from picographics import PicoGraphics, DISPLAY_INKY_FRAME from machine import Pin +import time -display = PicoGraphics(display=DISPLAY_INKY_FRAME) - -display.set_font("bitmap8") # Inky Frame uses a shift register to read the buttons SR_CLOCK = 8 @@ -15,70 +13,47 @@ SR_OUT = 10 sr = ShiftRegister(SR_CLOCK, SR_LATCH, SR_OUT) -# set up the button LEDs -button_a_led = Pin(11, Pin.OUT) -button_b_led = Pin(12, Pin.OUT) -button_c_led = Pin(13, Pin.OUT) -button_d_led = Pin(14, Pin.OUT) -button_e_led = Pin(15, Pin.OUT) + +# Simple class to debounce button input and handle LED +class Button: + def __init__(self, idx, led, debounce=50): + self.led = Pin(led, Pin.OUT) # LEDs are just regular IOs + self.led.on() + self._idx = idx + self._debounce_time = debounce + self._changed = time.ticks_ms() + self._last_value = None + + def debounced(self): + return time.ticks_ms() - self._changed > self._debounce_time + + def get(self, sr): + value = sr[self._idx] + if value != self._last_value and self.debounced(): + self._last_value = value + self._changed = time.ticks_ms() + return value -# a handy function we can call to clear the screen -# display.set_pen(1) is white and display.set_pen(0) is black -def clear(): - display.set_pen(1) - display.clear() +button_a = Button(7, 11) +button_b = Button(6, 12) +button_c = Button(5, 13) +button_d = Button(4, 14) +button_e = Button(3, 15) -# set up -clear() -display.set_pen(0) -display.text("Press any button!", 10, 10, scale=4) -display.update() - while True: - button_a_led.off() - button_b_led.off() - button_c_led.off() - button_d_led.off() - button_e_led.off() + sr.read() - # read the shift register - # we can tell which button has been pressed by checking if a specific bit is 0 or 1 - result = sr.read() - button_a = sr[7] - button_b = sr[6] - button_c = sr[5] - button_d = sr[4] - button_e = sr[3] + if button_a.get(sr): + button_a.led.toggle() + if button_b.get(sr): + button_b.led.toggle() + if button_c.get(sr): + button_c.led.toggle() + if button_d.get(sr): + button_d.led.toggle() + if button_e.get(sr): + button_e.led.toggle() - if button_a == 1: # if a button press is detected then... - button_a_led.on() - clear() # clear to white - display.set_pen(4) # change the pen colour - display.text("Button A pressed", 10, 10, scale=4) # display some text on the screen - display.update() # update the display - elif button_b == 1: - button_b_led.on() - clear() - display.set_pen(6) - display.text("Button B pressed", 10, 50, scale=4) - display.update() - elif button_c == 1: - button_c_led.on() - clear() - display.set_pen(5) - display.text("Button C pressed", 10, 90, scale=4) - display.update() - elif button_d == 1: - button_d_led.on() - clear() - display.set_pen(2) - display.text("Button D pressed", 10, 130, scale=4) - display.update() - elif button_e == 1: - button_e_led.on() - clear() - display.set_pen(3) - display.text("Button E pressed", 10, 170, scale=4) - display.update() + time.sleep(1.0 / 60) # Poll 60 times/second