Its UART driver developed on STM32 using KEIL software
1.void UART_init(unsigned short uart,unsigned long BR) uart - uart number 1,2,3 BR - buard rate (9600,115200,...)
2.void Write_UART(char mesg,unsigned short uart) This function enables sending a character through UART
3.char Read_UART(unsigned short uart); Reading function from UART
4.void Write_UART_string(char str[],unsigned short uart); function used for sending multiple character message through uart.