Nucleo stm32 tutorial1/6/2024 ![]() We can find the pin where LED is connected to in this pdf on page 66. – add delays in loop so that we can see that LED blinks – create a loop in the main section of main.c We need to do a couple of things before the LED will start blinking: Double click on it and it will open in editor. Now we need to open main.c and start adding our program. Here is where we will start to program our blinky with our own code. This means that program has been properly compiled without errors. It might take a while but at the end you must see text like this in console. Now click on Build Project (a little hammer on toolbar). This means that you have properly installed CubeMX and SW4STM32. You should get this popup window from SW4STM32. Click on Open Project and the project will be imported in SW4STM32. Now select in menu Project > Generate Code.Īfter project is generated a popup window will show. The rest you can leave as it is and click Ok. Project Name is just a name for your program (I use a practice for not using any space in names, I use underscore instead of space).įor Project Location I would suggest the place of your SW4STM32 workspace. You need to enter Project Name, Project Location and set Toolchain / IDE to SW4STM32. All we need is to tell the Cube whrere to store our program and which compiler we will be using. The setting we need for our Blinky are already set. Finally select NUCLEO-F401RE because our microcontroller is STM32F401RET6. In the MCU Series select STM32F4 -> F401RE. As Board select Nucleo64, because our board fits in this group. As vendor select ST as this is only option. At the top select tab named Board Selector it is easier ths way and some setting that are specific to this board are already configured. This is window for selecting microcontroller/board we will be using. Purpose of this tutorial is just to get LED to blink. We won’t go into details about each line of code. The whole code for this tutorial is on my repository.As mentioned in previous article in this one I will explain how to blink LED on Nucleo F401RE using STM32CubeMX and SW4STM32. We can now use: printf(“Celtics 2022 Champs!\r\n”) HAL_UART_Transmit(&huart2,stringMsg,sizeof(stringMsg),10) Now, instead of using this to transmit messages via serial port: unsigned char stringMsg = "Celtics 2022 Champs!\r\n" We also add a ferror function that would handle (although here it does nothing) errors in UART.Īll in all, this should be what it looks like: This is what is required so that the UART channel is diverted to printf(): Next, define a struct below the MX_GPIO_INIT function:īelow this line, create an instance of the struct and name it _stdout: For this, we need the stdio library.Īdd a reference to the stdio library just below “main.h”: We can further simplify printing out messages via serial by using the printf() function. With the STM32F1 connected to the PC using the USB port, we use terminal apps like Putty to view the message: ![]() This prints out the given string as long as the STM32F1 is on. HAL_UART_Transmit(&huart2,stringMsg,sizeof(stringMsg),10) // Sending in normal mode Unsigned char stringMsg = "Celtics 2022 Champs!\r\n" //Data to send Locate the line with the infinite loop (while (1)) and insert the following: /* USER CODE BEGIN WHILE */ The function requires the UART typedef, a char array for the message to be sent, the size of that char array, and a timeout period. HAL_StatusTypeDef HAL_UART_Transmit(UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size, uint32_t Timeout) Of course, this is also generated by STM32CubeMX:Īll that is left is to call the transmit function to send messages via serial. This is used to initiate everything that needs to be initiated in order to use the serial port. In main.c, you’ll notice a typedef for UART2. Here's a separate tutorial on how to use STM32CubeMX to generate code. If you choose to open the project, Keil V5 should start up and you have your ready-to-use code. In contrast, the STM32 Blue Pill, which uses an STM32F103C8, has pins PA11 and PA12 (USART1) wired to its USB port.Īssign the pins PA2 and PA3 to their USART equivalents as shown, using STM32CubeMX: The reason behind this choice is that for the Nucleo-64 F103B, the USB port is wired directly to these pins. This tutorial will use the PA2 and PA3 pins which house USART2 TX and RX pins respectively. Like most microcontrollers, the STM32F103RB has dedicated serial pins. Here's a refresher on serial communication just in case you need it. But how can we implement it with STM32F1? Placing the right messages in the right place will help you save hours in figuring out what went wrong in your code. Arduino programmers are very familiar with Serial. Needless to say, a serial output is a necessary tool in debugging embedded system applications. ![]()
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