How does the uart.write function output three bytes of 0XFF 0XFF 0XFF (HEX data, not string data)?

hupozhao

How does the uart.write function output three bytes of 0XFF 0XFF 0XFF (HEX data, not string data)? [Copy link]

 

How does the uart.write function output three bytes of 0XFF 0XFF 0XFF (HEX data, not string data)?

philips_lu

Look at how the header file definition is handled to see if there are any format control characters like the printf function or similar