cupi_shift | Rust crate for manipulating shift registers

cupi_shift is a Rust library typically used in Internet of Things (IoT), Raspberry Pi, Arduino applications. cupi_shift has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can download it from GitHub.

This crate provides an interface, Shifter that makes it trivially easy to manipulate shift registers with a Raspberry Pi (thanks to CuPi). Internally it keeps track of each shift register's state, allowing you to manipulate each pin individually as if it were a regular GPIO pin!. Why would you want to do this? The Raspberry Pi only has 17 usable GPIO pins. Pin expanders like the MCP23017 can add up to 16 more per chip (at a cost of about ~$2-3/each) but they work over I2C which is slow (on the Raspberry Pi anyway). With shift registers like the 74HC595 (~$0.05-0.10/each) you can add a nearly infinite amount of output pins and refresh them as fast as the hardware supports. You can even use many sets of 3 pins to run multiple chains of shift registers in parallel.