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63 lines
1.1 KiB
63 lines
1.1 KiB
//
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// Example of basic UART usage
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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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void main()
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{
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// Enable UART with baud rate 9600
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uart_init(9600);
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// --- some examples of printing functions ---
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// Printing a string
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uart_puts("Simple UART example!\r\n");
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// Use _pgm for strings in program memory
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// (PSTR macro is defined in avr/pgmspace.h)
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uart_puts_pgm(PSTR("Program memory string example\r\n"));
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// print a char. This is an alias for uart_tx
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uart_putc('a');
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// print a newline
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uart_nl();
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// Printing numbers is also easy
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// Look in `uart.h` for more info
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uart_putn(123);
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uart_nl();
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// Print int as float (adds decimal point at 4th place from the end)
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uart_puti(31415, 4);
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uart_nl();
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// --- receive example ---
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// Example of listening for input
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while(1) {
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// If something is received
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if (uart_rx_ready()) {
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// Get the received byte
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char c = uart_rx();
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// Send it back, twice
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uart_tx(c);
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uart_tx(c);
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}
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}
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}
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