Blue Bridge Cup embedded Hal library USART_ TX

Hardware design

Pins used

PA10 ---------- USART1_RX Serial port receiving pin For receiving data
PA9 ---------- USART1_TX Serial port 1 sending pin Used to send data
PA8 ---------- USART1_CK “ Serial port synchronization pin ” There is the function of sending data synchronously （ This pin needs to be used when sending and receiving data synchronously , The serial port generally uses asynchronous data sending and receiving , No need to send and receive data synchronously ）

Knowledge point

1、sprintf Function usage
Example ：
int counter = 0;
char str[40];
sprintf(str, “%04d:Hello,world.\r\n”, counter);
The experimental results are as follows ：

sprintf Knowledge Links ：sprintf

2、HAL_USART_Transmit usage

HAL_USART_Transmit(&husart1,(unsigned char *)str, strlen(str), 50);
Parameters 1： The pointer A serial port 1
Parameters 2： Array of characters to send
Parameters 3： The length of the contents in the character array
Parameters 4： Timeout time ms

The function is described as follows ：

Serial debugging assistant —AccessPort

AccessPort User manual

Blue Bridge Cup -HAL library -USART_RX