stm32 - ordinary serial port (receive query and interrupt combined)

Serial port experiment

1. Before doing any experiment, import the target file into the library file, then import the header file in the main function, and write the path in FWLIB. Of course, the serial port is no exception.

2. After importing the file, the second step is also port initialization (the function of the initialization statement has been explained later)

After initialization is complete, remember to call in the main function

3. Send data using the serial port

Use USART_SendData(USART1,'9'); to send a byte of data, printf(); can also be used to send a string. When using printf, remember to add it to the main() function

#include "stdio.h" header file, otherwise an error will be reported. Of course, the previous knowledge learned in C language can also be applied to the project, because this is originally written in C language

4. There are two ways to send data to the serial port and let the serial port receive and display it on the serial port.

(1) Query method

The first statement is to check whether the data has been sent, if not, continue to wait

The second statement receives data from the serial port USART_ReceiveData (USART1) and assigns it to the variable USART1_RE defined by us.

The third statement is to increase the received data by one and then output USART_SendData()

(2) Interrupt mode

Of course, before writing any method, you need to initialize the port USART_ITConfig(USART1, USART_IT_RXNE, DISABLE); // Enable serial port receive interrupt

Recommended serial port tools

The following is a simpler use