SunFounder ESP32 Manual page 437

# Define the hc595_shift function to shift data into the 74HC595 shift register
def
hc595_shift(dat):
# Set the RCLK pin to low
rclk.off()
# Iterate through each bit (from 7 to 0)
for bit in range(7, -1, -1):
# Extract the current bit from the input data
value = 1 &
# Set the SRCLK pin to low
srclk.off()
# Set the value of the SDI pin
sdi.value(value)
# Clock the current bit into the shift register by setting the SRCLK pin to high
srclk.on()
# Latch the data into the storage register by setting the RCLK pin to high
rclk.on()
# Initialize the random seed
random.seed(time.ticks_us())
num = 1
button_state = False
# Define the button callback function to toggle the button state
def button_callback(pin):
global button_state
not
button_state =
# Attach the button callback function to the falling edge of the button pin
button.irq(trigger=machine.Pin.IRQ_FALLING, handler=button_callback)
# Continuously display the current digit on the 7-segment display, scrolling if
is not pressed
while True:
# Display the current digit on the 7-segment display
hc595_shift(SEGCODE[num])
# If the button is pressed and button state is True
if
button_state:
pass
# If the button is pressed again and button state is False, generate a new
digit
if not button_state:
num = random.randint(1, 6)
3.38. 6.6 Digital Dice
(dat >> bit)
button_state
SunFounder ESP32 Starter Kit
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button␣
random␣
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