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Class Chip74HC595

Before each use of the Chip74HC595 object, make sure my74HC595.py has been uploaded to / on the ESP32-S3, and then add the statement from my74HC595 import Chip74HC595 to the top of the Python file.

  • Chip74HC595(): An object. By default, 74HC595's DS pin is connected to Pin(14) of ESP32-S3, ST_CP pin is connected to Pin(12), and OE pin is connected to Pin(5). To change the pins: chip=Chip74HC595() or chip=Chip74HC595(12,13,14,5).
  • shiftOut(direction, data): Writes data to the 74HC595.
    • direction: 1/0. 1 means the high-order byte is sent first; 0 means the low-order byte is sent first.
    • data: The one-byte content to send.
  • clear(): Clears the latch data of the 74HC595.

A copy of this module can be found here: reference_code/my74HC595.py

Adapted from Python_Tutorial.pdf — Chapter 14, 74HC595 & LED Bar Graph