![]() When you think you’ve got working code, go on to the next step to compile it.īelow is an example implementation, but feel free to use your own. Try to use these two functions to write code in your main function so that whenever the pushbutton is pressed, a “hello world” message will be transmitted through UART.For the timeout, you can pick any value you want. Pass this handle in to HAL_UART_Transmit.The function takes the address of a UART handle, a pointer to the data buffer, the size of the data buffer, and a timeout.ĬubeMX named the handle husart and filled out its attributes in usart.c. Locate the UART Generic chapter and find the function for transmitting for UART in blocking mode, HAL_UART_Transmit.Scroll down to the list of functions, and find the description for HAL_GPIO_ReadPin which takes the port and pin of interest and returns its state. Open the STM32F3 HAL datasheet that you downloaded and find the GPIO Generic Driver chapter.It also encapsulates a lot of the lower layer hardware details that we might otherwise have to worry about. STM’s HAL layer allows us to use the same functions regardless of the particular STM chip we are using, minimizing the number of changes we would have to make if we changed chips. ![]() ![]() We need a function that will allow us to read the pushbutton state and a function to send our message over UART. We will fill the while loop with code that will send “hello world” through UART whenever we push the blue USER pushbutton. *Initialize all configured peripherals */ * Reset of all peripherals, Initializes the Flash interface and the Systick.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |