Lup Yuen Lee 李立源

Will talk I2C on Apache RTOS and ? Let's find out!

github.com/lupyuen/rust-i2c-nu

1
Lup Yuen Lee 李立源

Apache exposes an ioctl() interface for the I2C Port ... Let's call it from

github.com/lupyuen/rust-i2c-nu

1
Lup Yuen Lee 李立源

Here's how we call 's I2C Interface from ... The "unsafe" way

github.com/lupyuen/rust-i2c-nu

1
Lup Yuen Lee 李立源

Here are the I2C Types ... Ported from C to

github.com/lupyuen/rust-i2c-nu

1
Lup Yuen Lee 李立源

Our I2C App reads a BME280 Register correctly! 🎉

github.com/lupyuen/rust-i2c-nu

1
Lup Yuen Lee 李立源

Embedded HAL defines a standard API for I2C Operations ... Let's wrap the I2C ioctl() Commands and expose as Rust Embedded HAL interfaces

github.com/lupyuen/rust-i2c-nu

1
Lup Yuen Lee 李立源

We wrap the I2C ioctl() interface ... And expose as Embedded HAL

github.com/lupyuen/rust-i2c-nu

1
Lup Yuen Lee 李立源

Here's how we call Embedded HAL to read an I2C Register ... Our I2C App is much simpler now!

github.com/lupyuen/rust-i2c-nu

1
Lup Yuen Lee 李立源

Our App writes to an I2C Register ... By calling Embedded HAL

github.com/lupyuen/rust-i2c-nu

1
Lup Yuen Lee 李立源

Logic Analyser shows that on wrote the Wrong Value to our I2C Register ... Let's fix this 🤔

github.com/lupyuen/rust-i2c-nu

1
Lup Yuen Lee 李立源

has a peculiar I2C Port that uses I2C Sub Addresses ... Let's make it work with Embedded HAL

github.com/lupyuen/rust-i2c-nu

1
Lup Yuen Lee 李立源

Still having problems with I2C Writes ... And the peculiar I2C Sub Addresses ... Grrr 😬

github.com/lupyuen/rust-i2c-nu

1
Lup Yuen Lee 李立源

Trying all combinations of I2C Read / Write / Sub Address ... Till we find one that works on 👍

github.com/lupyuen/rust-i2c-nu

1
Lup Yuen Lee 李立源

I2C Write on works ONLY when we do an I2C Read AFTER the I2C Write ... So quirky! 🤔

github.com/lupyuen/rust-i2c-nu

1
Lup Yuen Lee 李立源

now writes correctly to I2C Registers! 🎉 There's an extra I2C Read at the end, but it should be harmless

github.com/lupyuen/rust-i2c-nu

1
Lup Yuen Lee 李立源

What happens if writes to an I2C Register without reading it afterwards? The I2C Write gets truncated or zeroed 🤔

github.com/lupyuen/rust-i2c-nu

1
Lup Yuen Lee 李立源

Now that Embedded HAL runs OK on Apache RTOS ... Let's test the Rust Driver for BME280 Sensor!

github.com/lupyuen/rust-i2c-nu

1
Lup Yuen Lee 李立源

We add the Driver for BME280 Sensor to our App ... By editing Cargo.toml

github.com/lupyuen/rust-i2c-nu

1
Lup Yuen Lee 李立源

Here's how we read the BME280 Sensor in our App for RTOS

github.com/lupyuen/rust-i2c-nu

1
Lup Yuen Lee 李立源

Driver for BME280 Sensor ... Runs OK on Apache RTOS! 🎉

github.com/lupyuen/rust-i2c-nu

1
Lup Yuen Lee 李立源
Follow

Embedded HAL for Apache RTOS has been published on crates.io ... Ready to be used in your own NuttX Rust Apps! 👍

github.com/lupyuen/rust-i2c-nu

· · Tusky · 1 · 0 · 2
Lup Yuen Lee 李立源

talks to BME280 I2C Sensor on and Apache RTOS ... All shall be explained in this article

lupyuen.github.io/articles/rus

1
Lup Yuen Lee 李立源

Here's how our app reads the BME280 Sensor ... On Apache RTOS

lupyuen.github.io/articles/rus

1
Lup Yuen Lee 李立源

Connecting BME280 Sensor to and ... For Apache RTOS

lupyuen.github.io/articles/rus

1+
Lup Yuen Lee 李立源

Running the Driver for BME280 Sensor ... On Apache RTOS

lupyuen.github.io/articles/rus

1
Lup Yuen Lee 李立源

Driver for BME280 Sensor works on Apache RTOS ... Without any changes!

lupyuen.github.io/articles/rus

1
Lup Yuen Lee 李立源

What's inside the Embedded HAL for Apache RTOS

lupyuen.github.io/articles/rus

1
Lup Yuen Lee 李立源

Reading an I2C Register with on Apache RTOS

lupyuen.github.io/articles/rus

1
Lup Yuen Lee 李立源

Here's how we write an I2C Register with on Apache RTOS

lupyuen.github.io/articles/rus

1
Lup Yuen Lee 李立源

Here's how we read the Bosch BME280 Sensor with ... On and Apache RTOS

lupyuen.github.io/articles/rus

0
Kreyren :verified:

@lupyuen What is that used for?

1
Lup Yuen Lee 李立源

@kreyren That's the Bosch BME280 Sensor for Temperature, Humidity and Air Pressure: bosch-sensortec.com/products/e

1
Kreyren :verified:

@lupyuen Hmm.. can it arduino?

1
Lup Yuen Lee 李立源

@kreyren Yep there's a BME280 Driver for Arduino: create.arduino.cc/projecthub/d

0
Sign in to participate in the conversation
CleverLibre Social

CleverLibre Social is an inclusive social instance for open discussion, learning, and community.
All cultures welcome.
Hate speech and harassment strictly forbidden.

Trending now

Resources

Developers

What is Mastodon?

social.cleverlibre.org

More…

v3.5.19-qoto · Privacy policy