Skip to content

Update uart.c #36

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
roelandkluit wants to merge 1 commit into
base: master
Choose a base branch
from
Open

Update uart.c #36

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
21 changes: 17 additions & 4 deletions uart/uart.c
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -19,11 +19,24 @@
#define PGM_READ_BYTE(x) pgm_read_byte(x)
#endif

// Just enable the UART Tx and set baud rate for 38400 on 3.6864MHz (STK500)
// Just enable the UART Tx and set baud rate for 9600 on F_CPU
// https://www.electronicwings.com/avr-atmega/atmega1632-usart

void UART_init(void) {
UCSRB = (1 << TXEN0);
UBRRL = USE_UART; // SEE HERE: http://wormfood.net/avrbaudcalc.php
#define USART_BAUDRATE 9600
#define BAUD_PRESCALE (((F_CPU / (USART_BAUDRATE * 16UL))) - 1)

void UART_init(void)
{
#ifdef USE_UART
UCSRB |= (1 << TXEN0); /* Turn on transmission and reception */
//UCSRC |= (1 << URSEL) | (1 << UCSZ0) | (1 << UCSZ1);/* Use 8-bit char size */
UBRRL = BAUD_PRESCALE; /* Load lower 8-bits of the baud rate */
UBRRH = (BAUD_PRESCALE >> 8); /* Load upper 8-bits*/
/*
UCSRB = (1 << TXEN0);
UBRRL = USE_UART; // SEE HERE: http://wormfood.net/avrbaudcalc.php
*/
#endif
}

// The classic Tx one character routine
Expand Down