Merge pull request #2 from TeXitoi/add-bmp280

Add basic BMP280 support

Cargo.toml

@@ -2,10 +2,10 @@
 name = "bme280"
 version = "0.1.0"
 authors = ["Sean Bruton <[email protected]>"]
-description = "A rust device driver for the Bosch BME280 temperature, humidity, and atmospheric pressure sensor"
+description = "A rust device driver for the Bosch BME280 temperature, humidity, and atmospheric pressure sensor and the Bosch BMP280 temperature, and atmospheric pressure sensor"
 repository = "https://github.com/uber-foo/bme280-rs"
 license = "MIT OR Apache-2.0"
-keywords = ["bme280", "temperature", "pressure", "humidity"]
+keywords = ["bme280", "bmp280", "temperature", "pressure", "humidity"]
 categories = ["embedded", "no-std", "hardware-support"]
 
 [dependencies]

README.md

@@ -1,6 +1,6 @@
 # bme280
 
-A rust device driver for the Bosch BME280 temperature, humidity, and atmospheric pressure sensor.
+A rust device driver for the Bosch BME280 temperature, humidity, and atmospheric pressure sensor and the Bosch BMP280 temperature and atmospheric pressure sensor.
 
 WARNING: This library is under active development. It is not currently intended
 for production use.

src/lib.rs

@@ -8,7 +8,7 @@
 )]
 #![no_std]
 
-//! A platform agnostic Rust driver for the Bosch BME280, based on the
+//! A platform agnostic Rust driver for the Bosch BME280 and BMP280, based on the
 //! [`embedded-hal`](https://github.com/japaric/embedded-hal) traits.
 //!
 //! ## The Device
@@ -17,6 +17,9 @@
 //! is a highly accurate sensor for atmospheric temperature, pressure, and
 //! relative humidity.
 //!
+//! The [Bosch BMP280](https://www.bosch-sensortec.com/bst/products/all_products/bmp280)
+//! is a highly accurate sensor for atmospheric temperature, and pressure.
+//!
 //! The device has I²C and SPI interfaces (SPI is not currently supported).
 //!
 //! ## Usage
@@ -70,6 +73,7 @@ const BME280_RESET_ADDR: u8 = 0xE0;
 const BME280_SOFT_RESET_CMD: u8 = 0xB6;
 
 const BME280_CHIP_ID: u8 = 0x60;
+const BMP280_CHIP_ID: u8 = 0x58;
 const BME280_CHIP_ID_ADDR: u8 = 0xD0;
 
 const BME280_DATA_ADDR: u8 = 0xF7;
@@ -180,7 +184,7 @@ pub struct Measurements<E> {
     pub temperature: f32,
     /// pressure in pascals
     pub pressure: f32,
-    /// percent relative humidity
+    /// percent relative humidity (`0` with BMP280)
     pub humidity: f32,
     _e: PhantomData<E>,
 }
@@ -342,7 +346,7 @@ where
 
     fn verify_chip_id(&mut self) -> Result<(), Error<E>> {
         let chip_id = self.read_register(BME280_CHIP_ID_ADDR)?;
-        if chip_id == BME280_CHIP_ID {
+        if chip_id == BME280_CHIP_ID || chip_id == BMP280_CHIP_ID {
             Ok(())
         } else {
             Err(Error::UnsupportedChip)