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

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

1
Lup Yuen Lee 李立源
Follow

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

lupyuen.github.io/articles/rus

· · Tusky · 1 · 1 · 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
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