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Inky Frame: New button test, old is now button demo.

This commit is contained in:
Phil Howard 2022-10-03 14:37:02 +01:00
parent 9424ae7081
commit 9663be2787
2 changed files with 125 additions and 65 deletions
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85
micropython/examples/inky_frame/button_demo.py Normal file
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@ -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()

105
micropython/examples/inky_frame/button_test.py
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@ -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