27 lines
346 B
C
27 lines
346 B
C
#include "led.h"
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#include "uart.h"
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#define uart0 ((struct uart*)0xc010)
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int main() {
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int c;
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int led = 0;
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while (1) {
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led_write(1 << led);
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c = uart_read(uart0);
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if (c == 'a') {
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led++;
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} else if (c == 'd') {
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led--;
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}
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if (led == 8) {
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led = 0;
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} else if (led < 0) {
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led = 7;
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}
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}
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}
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