We need some kind of feedback of button reading so we will be using main.c from Blinky example. If you look you can also see R29 and C15 which are used for debouncing. We need to configure this pin to be input, internal pull-up resitor is not needed because there is one on the board outside of microcontroller. We need to get something like …Build finished… in console.Īs we can see here, the blue button is connected to pin 13 of PORT C: We Build our program (by clicking on hammer on toolbar. Now we need to generate program ( Menu -> Project -> Generate Code) and click on Open Project and now we are ready in SW4STM32 to start coding.įirst we need to check if everything is ready. Now it is time to read some buttons.įirst we need to generate project in CubeMX, we need to select board as in our Blinky example (I will explain later why we are selecting Nucleo board and not our specific microcontroller): ![]() The STM32 MCUs are commonly used in many industrial and commercial products these days.In previous posts I wrote about blinking LED and configuring ports. It is beginner friendly and on top of that, it is free to use, just download the IDE and its respective drive from link below. Out of these, the Keil MDK is the most used one. The Board can be programmed with many Development tool chains which are listed below: NUCLEO-F401RESTM32 Nucleo-64 development board with STM32F401RE MCU, supports Arduino and ST morpho connectivity. The Nucleo Development Board is relatively easy to get started and learn since it has an in-built programmer and debugger. Note: More technical information can be found in the STM32 Nucleo-F401RE Datasheet, linked at the bottom of this page.Īrduino UNO, Arduino Pro Mini, Arduino Mega, Arduino Due, Arduino Leonardo, Raspberry Pi, PIC Development Board, AVR Development Board, MSP430 Launchpad, Intel Edison, ESP32 PC0, PC1, PC2, PC3, PC10, PC11, PC12, PC13, PC14, PC15Ĭan be used to power them module from battery They are also categorized with the table below: The name of the pins can be found in the image above. They comprise of GPIO pins, Analog Pins, Timer Pins, and Power pins. These pins are classified into CN7 and CN10 with each having 38 Pins. These pins can also be used for I2C Communication A4 is SDA and A5 is SCLĬan be used to provide analog reference voltageĪcts as SCK, MISO, MOSI and CS pins respectively for SPI communicationĪcts as Rx and Tx pins respectively for USART communicationĪpart from the Arduino pins, the board also has 76 (38+38) GPIO pins as male headers on either side of the board as shown above. Provides 3.3V as output can also be used to power the MCU Each category pin can be tabulated as follows: The Arduino pins are split into category CN5, CN6, CN8, and CN9. ![]() ![]() The arduino like pins are female connector pins which exactly match the order and position of Arduino UNO pins and hence any Arduino shield can be used with these development boards. The pin one resembles the Arduino UNO and the blue one is the STM32 style ( Morpho). As you can see, there are two sets of pins. The STM32 Nucleo board pinout is shown above. The Board operates with 3.3V supply but a wide voltage range of 7-12V can be provided to the VIN pin since it has an on-board voltage regulator. Similarly, there are two push buttons where one is user programmable, and the other is to reset the Microcontroller. This board also comes with an integrated ST-LINK/V2-1 programmer and debugger hence it is very easy to get started with this board.Īs shown in the image above, there are three LEDs, where LD1 is for indicating USB communication, LD2 is programmable LED, and LD3 indicates power. The Boards pinout is similar to Arduino UNO and has many other additional pins to expand performance. It features the ARM Cortex M4 32-bit STM32F401RET6 microcontroller which is in LQFP64 package. The STM32 Nucleo boards are the official Development Boards from STMicroelectronics.
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