# max6675-hal
[
](https://github.com/onkoe/max6675-hal)
[
](https://docs.rs/max6675-hal)
[
](https://crates.io/crates/max6675-hal)
[
](https://github.com/onkoe/max6675-hal)
[
](https://github.com/onkoe/max6675-hal/actions)
An `embedded-hal` driver for the MAX6675 digital thermocouple converter.
## Usage
This example code will change depending on which HAL device driver you're using. An `arduino-hal` project's SPI isn't like that of an `esp32-hal` project.
However, you only have to focus on two parts:
1. A CS (chip select) pin as an `OutputPin`
2. Some SPI representation that doesn't exclusively own the CS pin (I'm looking at you, `linux-embedded-hal`!)
Your SPI settings should use MSB (most significant bit) first, target a clock speed of at least 4mhz, and utilize SPI Mode 1.
After both are good, pass them into the `Max6675::new(spi, chip_select)` constructor. Ta-da! Your MAX6675 gets put to good use.
```rust
// first, define what pins you're connecting to
let so_pin = pins.("your miso pin").into_pull_up_input();
let cs_pin = pins.("your cs pin").into_output();
let sck_pin = pins.("your sck/clock pin").into_output();
// you may need a mosi pin for your device's SPI, though the max6675 doesn't use one.
// if so, just pick some pin that you're not using ☺️
let dummy_mosi = pins.("some pin you're not using").into_output();
let (spi, cs) = device-hal::spi::Spi::new(
sck_pin, dummy_mosi, so_pin, cs_pin,
device-hal::spi::Settings {
// pick some settings that roughly align like so:
data_order: MostSignificantFirst,
clock: 4MhzClockSpeed,
mode: embedded_hal::spi::MODE_1,
}
);
let mut max = Max6675::new(spi, cs)?; // your spi and chip select here
let temp = max.read_celsius()? // ayo! we got the temperature
```
## Contributions
Contributions are welcome to this project! Since it's pretty small, feel free to submit a PR whenever. You can also make an issue - I'll likely get to it soon!
## Help
Please don't hesitate to make an issue if you experience any problems!
If you can, please submit a [`hw-probe` report](https://linux-hardware.org/?view=howto) alongside any error messages or useful logs you have!