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57 lines
1.0 KiB
57 lines
1.0 KiB
6 years ago
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#include <avr/io.h> // register definitions
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#include <avr/pgmspace.h> // storing data in program memory
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#include <avr/interrupt.h> // interrupt vectors
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#include <util/delay.h> // delay functions
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#include <stdint.h> // C header for int types like uint8_t
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#include <stdbool.h> // C header for the bool type
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#include <stdlib.h>
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// Include stuff from the library
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#include "lib/iopins.h"
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#include "lib/usart.h"
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#include "lcd.h"
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// Pins
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#define LED 13
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void _lcd_wait_bf();
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void _lcd_write_byte(uint8_t bb);
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// UART receive handler
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ISR(USART_RX_vect)
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{
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// "ECHO" function:
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uint8_t b = usart_rx();
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usart_tx(b); // send back
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}
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void main()
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{
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usart_init(BAUD_115200);
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usart_isr_rx_enable(true); // enable RX interrupt handler
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// configure pins
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as_output(LED);
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lcd_init();
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// globally enable interrupts (for the USART_RX handler)
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sei();
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uint8_t cnt = 0;
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while (1) {
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lcd_clear();
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lcd_xy(cnt, 0);
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lcd_putc('A'+cnt);
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cnt = (cnt+1)%20;
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pin_toggle(13); // blink the LED
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_delay_ms(100);
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}
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}
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