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46 lines
745 B
46 lines
745 B
/** @file beep1.c
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@author M.P. Hayes
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@date 17 Sep 2013
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*/
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#include "system.h"
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#include "pio.h"
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#include "pacer.h"
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#include "button.h"
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#include "delay.h"
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/* Connect piezo tweeter to outermost pins of UCFK4 P1 connector. */
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#define PIEZO_PIO PIO_DEFINE (PORT_D, 6)
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#define LOOP_RATE 880
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int main (void)
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{
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system_init ();
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pio_config_set (PIEZO_PIO, PIO_OUTPUT_LOW);
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button_init ();
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pacer_init (LOOP_RATE);
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while (1)
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{
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pacer_wait ();
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/* Generate annoying tone. */
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pio_output_toggle (PIEZO_PIO);
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/* While button down introduce delay to produce overrun. */
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if (button_down_p (BUTTON1))
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{
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delay_ms (2);
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}
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}
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return 0;
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}
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