2 unstable releases
Uses old Rust 2015
0.2.0 | Nov 17, 2018 |
---|---|
0.1.0 | Nov 11, 2018 |
#6 in #driver-for-microchip
11KB
138 lines
Rust Library for the Microchip MCP23X17
In its current incarnation, this only supports I2C but the register map is the same for SPI as well.
Internally, the chip supports a segreggated layout of registers to make
two 8 bit GPIO ports or can interleave the registers to emulate one
16 bit GPIO port. This library works on the former layout and so disables
setting BANK
when calling set_config()
.
use linux_hal::I2cdev;
use mcp23x17::{
Mcp23x17 as Expander,
Port
};
fn main() -> Result<(), Box<Error>> {
let i2c = I2cdev::new("/dev/i2c-1")?;
let mut exp = Expander::new(i2c)?;
exp.select_port(Port::B);
exp.set_direction(0x00)?;
exp.set_data(0xff)?;
}
Implementation details taken from http://ww1.microchip.com/downloads/en/DeviceDoc/20001952C.pdf
The Microchip mcp23x17 GPIO expander -- Now with more Rust
This is a Rust Embedded HAL crate to work with a GPIO expander. I bought this chip just to play with, so don't expect battle hardened code here. Ideally one day it will expose embedded-hal style GPIO pins but that's not a priority.
In fact, nothing here is a priority. Do you feel like making it better? Let me know!
Dependencies
~190KB