87 lines
2.6 KiB
Python
87 lines
2.6 KiB
Python
# 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.
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from pimoroni import ShiftRegister
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# from picographics import PicoGraphics, DISPLAY_INKY_FRAME as DISPLAY # 5.7"
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# from picographics import PicoGraphics, DISPLAY_INKY_FRAME_4 as DISPLAY # 4.0"
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from picographics import PicoGraphics, DISPLAY_INKY_FRAME_7 as DISPLAY # 7.3"
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from machine import Pin
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display = PicoGraphics(display=DISPLAY)
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display.set_font("bitmap8")
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# Inky Frame uses a shift register to read the buttons
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SR_CLOCK = 8
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SR_LATCH = 9
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SR_OUT = 10
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sr = ShiftRegister(SR_CLOCK, SR_LATCH, SR_OUT)
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# set up the button LEDs
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button_a_led = Pin(11, Pin.OUT)
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button_b_led = Pin(12, Pin.OUT)
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button_c_led = Pin(13, Pin.OUT)
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button_d_led = Pin(14, Pin.OUT)
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button_e_led = Pin(15, Pin.OUT)
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# a handy function we can call to clear the screen
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# display.set_pen(1) is white and display.set_pen(0) is black
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def clear():
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display.set_pen(1)
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display.clear()
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# set up
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clear()
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display.set_pen(0)
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display.text("Press any button!", 10, 10, scale=4)
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display.update()
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while True:
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button_a_led.off()
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button_b_led.off()
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button_c_led.off()
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button_d_led.off()
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button_e_led.off()
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# read the shift register
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# we can tell which button has been pressed by checking if a specific bit is 0 or 1
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result = sr.read()
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button_a = sr[7]
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button_b = sr[6]
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button_c = sr[5]
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button_d = sr[4]
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button_e = sr[3]
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if button_a == 1: # if a button press is detected then...
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button_a_led.on()
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clear() # clear to white
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display.set_pen(4) # change the pen colour
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display.text("Button A pressed", 10, 10, scale=4) # display some text on the screen
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display.update() # update the display
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elif button_b == 1:
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button_b_led.on()
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clear()
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display.set_pen(6)
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display.text("Button B pressed", 10, 50, scale=4)
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display.update()
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elif button_c == 1:
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button_c_led.on()
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clear()
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display.set_pen(5)
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display.text("Button C pressed", 10, 90, scale=4)
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display.update()
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elif button_d == 1:
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button_d_led.on()
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clear()
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display.set_pen(2)
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display.text("Button D pressed", 10, 130, scale=4)
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display.update()
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elif button_e == 1:
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button_e_led.on()
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clear()
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display.set_pen(3)
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display.text("Button E pressed", 10, 170, scale=4)
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display.update()
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