GPIO PINS ON NUCLEO F401RE HOW TO
GPIO PINS ON NUCLEO F401RE INSTALL

Add labels to the SCK and MOSI signals by clicking on “Click to add description”, then open the Protocol Analyzers tab, add and connect the SPI protocol analyzer: Observe how the “Hello, World” message got decoded.

Then double-click on any of the solid blocks in the SCK or MOSI signals to zoom in to see the actual signal: Observe the typical SPI signal waveform: the SCK clock generates monotonous clock pulses during the transmission and the MOSI signal (Master Output Slave Input) transmits the data one bit at a time.

Click in the “Trigger” column of the NSS signal so that the data frame gets aligned to the falling edge (start of transmission).

Finally click on the connected signals in the Analyzer2Go window to immediately see the live SPI signal: Observe the repeated pattern: the NSS signal goes from 1 to 0 (indicating the start of a transmission), then the SCK and MOSI signals quickly change the values and the NSS gets back to 1.

Do not forget to connect the ground between the 2 boards:

Then connect the relevant SPI signals (MOSI, SCLK and NSS) to the inputs of the logic analyzer board that are shown in the Analyzer2Go window.

First start Analyzer2Go, connect the board you want to use as a logic analyzer and select it in the list: If you don’t have the Nucleo-F411RE board, you can use any of the other boards supported by Analyzer2Go or an external logic analyzer. In this tutorial will use Analyzer2Go and the ST NUCLEO-F411RE board to capture and analyze the signals.

Now we will use a logic analyzer to observe the SPI signals produced by the board.

Set a breakpoint on the first call to HAL_GPIO_WritePin() and start debugging.

Build the project and ensure that is succeeds without any errors:.

Note that we manually control the NSS signal by setting the PA4 pin value to 0 before the transmission and setting it back 1 after the transmission. For STM32F407VG we will use pins PA4-PA7 with SPI1 (note tha alternate function number that is AF5 in this case): First of all, locate the datasheet for your STM32 device and find the pins that can be used for SPI. Now we will modify the project to send a basic message over the STM32 SPI interface.

Click “Finish” to generate the basic project and ensure it builds.

Connect your board to the computer and click ‘Detect’ to automatically detect your ST-Link interface: For most STM32 devices programmable via ST-Link we recommend using OpenOCD.

Finally specify your debugging settings.

Select the default “LEDBlink” example and click “Next”:.

In this tutorial we will use the STM32F4Discovery board that uses the STM32F407VG chip, however the techniques described here will work for other chips as well:

On the next page select your STM32 device.

Proceed with the default settings on the first page:.

Start Visual Studio and open the VisualGDB Embedded Project Wizard:.

GPIO PINS ON NUCLEO F401RE INSTALL

We will use an STM32F4Discovery board to demonstrate the SPI and a Nucleo-F411RE board with Analyzer2Go to capture and analyze the generated SPI signals.īefore you begin, install Visual Studio and VisualGDB: We will configure the SPI in several different modes, show how they affect the generated signal and setup the double-buffered mode to demonstrate continuous uninterrupted mode.

GPIO PINS ON NUCLEO F401RE HOW TO

For example If the port has 16 pins, you can set them as best suits your needs: 8 input and 8 output, or 7 input and 9 output, or any other combination.This tutorial shows how to use the SPI interface of the STM32 devices using the STM32CubeMX HAL API.Each GPIO pin can be freely set to function as either an input or an output.As an output port, it can be used to drive outside operations based on CPU instructions and calculation results-for example, to drive an LED display based on calculation results, or to output drive signals to a motor.As an input port, it can be used to communicate to the CPU the ON/OFF signals received from switches, or the digital readings received from sensors.A GPIO (general-purpose input/output) port handles both incoming and outgoing digital signals.11 Setting the Value of a Register Pin using C Language.2.1 Basic structure of a standard I/O port bit.

Gpio pins on nucleo f401re