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42 lines
631 B
42 lines
631 B
//
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// Example of UART with interrupts
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//
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#include <avr/io.h>
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#include <util/delay.h>
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#include <avr/pgmspace.h>
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#include <avr/interrupt.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include "lib/uart.h"
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#include "lib/stream.h"
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// UART receive interrupt vector
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ISR(USART_RX_vect)
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{
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uint8_t c = uart_rx();
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// print character and it's code
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uart_tx(c);
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uart_tx(' ');
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put_u8(uart, c);
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put_nl(uart);
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}
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void main()
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{
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// Set up UART at speed 9600 baud
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uart_init(9600);
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// Enable receive ISR
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uart_isr_rx(1);
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// Enable interrupts
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sei();
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// Greeter string
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put_str_P(uart, PSTR("UART receiver with ISR\r\n"));
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while(1);
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}
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