You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
54 lines
1.3 KiB
C
54 lines
1.3 KiB
C
#include <avr/io.h>
|
|
#include "uart.h"
|
|
|
|
static int uart_putchar(char c, FILE *stream);
|
|
|
|
FILE uart_output = FDEV_SETUP_STREAM(uart_putchar, NULL, _FDEV_SETUP_WRITE);
|
|
|
|
void uart_init()
|
|
{
|
|
DDRD |= 1 << 1; // TX
|
|
UART_BAUD_REGH = (BAUDRATE>>8);
|
|
UART_BAUD_REGL = BAUDRATE; // set baud rate
|
|
|
|
UART_CTRL_REGB |= (1<<UART_TXEN_BM)
|
|
//|(1<<UART_RXEN_BM)
|
|
|(1<<UART_RXCIE_BM); // enable receiver and transmitter
|
|
|
|
UART_CTRL_REGC |= (1<<UART_URSEL_BM)
|
|
|(1<<UART_UCSZ0_BM)
|
|
|(1<<UART_UCSZ1_BM); // 8bit data format
|
|
|
|
stdout = &uart_output;
|
|
}
|
|
|
|
static int uart_putchar(char c, FILE *stream) {
|
|
if (c == '\n') {
|
|
uart_putchar('\r', stream);
|
|
}
|
|
loop_until_bit_is_set(UART_CTRL_REGA, UART_UDRE_BM);
|
|
UART_DATA_REG = c;
|
|
return 0;
|
|
}
|
|
|
|
void read_sync(char buffer[], uint8_t buffersize, uint8_t * bufferindex){
|
|
for(int i=0; i < buffersize; i++){
|
|
buffer[i]=0;
|
|
}
|
|
*bufferindex=0;
|
|
|
|
char input;
|
|
do{
|
|
while ((UART_CTRL_REGA & (1 << UART_RXC_BM)) == 0);
|
|
input = UART_DATA_REG;
|
|
|
|
putchar(input); //echo
|
|
buffer[*bufferindex]=input;
|
|
*bufferindex=*bufferindex+1;
|
|
}while(!(input == '\n' || input == '\r'));
|
|
buffer[*bufferindex]=0;
|
|
putchar('\n');
|
|
}
|
|
|
|
|