Arduino Uart Parity

[Alan_37]

Hi

I need to to use the UART with even parity enabled on an Atmega328p
anyone know what C code I need to add please ?

Found the following on the web but don't know how to implement for flowcode
seems that register UCSR0C is responsible for parity but don't know how to .

void serial_init ( unsigned short ubrr ) {
UBRR0 = ubrr ; // Set baud rate
UCSR0B |= (1 << TXEN0 ); // Turn on transmitter
UCSR0B |= (1 << RXEN0 ); // Turn on receiver
UCSR0C = (3 << UCSZ00 ); // Set for async . operation , no parity ,
// one stop bit , 8 data bits
}

[mnfisher]

From the datasheet:

2023-11-22_21-12-56.jpg (112.82 KiB) Viewed 5460 times

So you need to set bits 4 and 5 correctly,

UCSR0C |= 1 << UPM01; // Set UPM01 to 1
UCSR0C &= ~(1 << UPM00); // Clear UPM00


Martin

[Alan_37]

Hi Martin ,

Thanks for your fast reply , so I put the 2 lines in a c code
and put it after INIT uart is that right ?

I try it and let you know

Thanks again

[mnfisher]

Maybe - you'll probably need to check the UPE flag in UCSR0A to check for errors? If it works

[Alan_37]

Hello Again ,

It works perfectly !!

Thanks so much for your help

[mnfisher]

That's great - thanks for the fast feedback too....