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# SPDX-FileCopyrightText: 2021 ladyada for Adafruit Industries
# SPDX-License-Identifier: MIT
"""
'shift_in_out_demo.py'.
=================================================
shifts data into and out of a data pin
"""
import time
import board
import digitalio
import simpleio
# set up clock, data, and latch pins
clk = digitalio.DigitalInOut(board.D12)
data = digitalio.DigitalInOut(board.D11)
latch = digitalio.DigitalInOut(board.D10)
clk.direction = digitalio.Direction.OUTPUT
latch.direction = digitalio.Direction.OUTPUT
while True:
data_to_send = 256
# shifting 256 bits out of data pin
latch.value = False
data.direction = digitalio.Direction.OUTPUT
print("shifting out...")
simpleio.shift_out(data, clk, data_to_send, msb_first=False)
latch.value = True
time.sleep(3)
# shifting 256 bits into the data pin
latch.value = False
data.direction = digitalio.Direction.INPUT
print("shifting in...")
simpleio.shift_in(data, clk)
time.sleep(3)
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