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Nucleo f401re example code install#
Nucleo f401re example code manual#
Nucleo f401re example code code#
Nucleo f401re example code Pc#

Note that as opposed to the LED output, the button handle here does not need to be mutable since we will only be reading it.ġ️⃣ Configure the system clocks: The system clocks need to be configured as they are needed in setting up the UART peripheral. The stm32f4xx_hal crate to import the STMicro STM32F4 series microcontrollers device hardware abstractions on top of the peripheral access API.Įnter fullscreen mode Exit fullscreen mode.The panic_halt crate to define the panicking behavior to halt on panic.The debouncr crate to debounce the button press.The core::fmt crate will allow us to use the writeln! macro for easy printing.

Nucleo f401re example code code#

The cortex_m_rt crate for startup code and minimal runtime for Cortex-M microcontrollers.In this implementation, the following crates are required: The updated flow diagram would look as follows:

Nucleo f401re example code Pc#

I will be sending/printing a value that tracks the number of times the button is pressed to the PC terminal.

I will be leveraging the debouncr crate (yes, that's how the crate name is spelled 😀) to eliminate the effect of button debouncing.

Here, however, I will be adding two things: The application in this post adopts the same algorithmic approach as my previous post.

Nucleo f401re example code manual#

Unless you are using a different board other than the Nucleo-F401RE, you have to check the relevant documentation (reference manual or datasheet) to determine the number of the pin. This is a hardwired pin, meaning you cannot use any other for this setup. The UART Tx line that connects to the PC through the onboard USB bridge is via pin PA2 on the microcontroller.User button connected to pin PC13 on the microcontroller.

LED is connected to pin PA5 on the microcontroller.

On-board Nucleo-F401RE connections will be utilized and include the following: There will be no need for external connections. Some installation instructions for the different operating systems are available in the Discovery Book.

Nucleo f401re example code install#

In addition to the above, you would need to install some sort of serial communication terminal on your host PC. Note that if the code on the git repo is slightly different then it means that it was modified to enhance the code quality or accommodate any HAL/Rust updates. Familiarity with UART communication basics.Īll the code presented in this post in addition to instructions for the environment and toolchain setup are available on the apollolabsdev Nucleo-F401RE git repo.Familiarity with the basic template for creating embedded applications in Rust.To understand the content of this post, you need the following: Additionally, I will not be using interrupts and the example will be set up as a simplex system that transmits in one direction only (towards the PC). I will be leveraging the GPIO button-controlled blinking project from a previous post to print to the console how many times the button has been pressed. In this post, I will be configuring and setting up UART communication with a PC terminal for the Nucleo-F401RE board.

Obviously this does not make UART obsolete, as it has other use cases and some controllers don't support advanced debug to start with. However, for that particular use case, nowadays some microcontrollers have advanced debug features like instruction trace macrocell (aka ITM) that don't leverage the device's own peripheral resources. One of the common past use cases for UART was in development to print output to a PC. Setting up UART serial communication is useful for any type of device-to-device (point-to-point) communication. If you liked this post, please make sure you subscribe to the newsletter here to stay informed about new blog posts. Please be aware that certain concepts in newer posts could depend on concepts in prior posts. This blog post is the third one of a multi-part series of posts where I explore various peripherals in the STM32F401RE microcontroller using embedded Rust at the HAL level.