Datasheet

in r16,UBRRH

in r16,UCSRC

ret

C Code Example

(1)

unsigned char USART_ReadUCSRC( void )

{

unsigned char ucsrc;

/* Read UCSRC */

ucsrc = UBRRH;

ucsrc = UCSRC;

return ucsrc;

}

Note: 1. See About Code Examples.

The assembly code example returns the UCSRC value in r16.

Reading the UBRRH contents is not an atomic operation and therefore it can be read as

an ordinary register, as long as the previous instruction did not access the register

location.