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3 jlesech 1 
/**************************************************************************//**
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 * \file input_to_output.c
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 ******************************************************************************/
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/******************************************************************************
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 * Header file inclusions.
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 ******************************************************************************/
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#include <digital_io/digital_io.h>
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#include <avr/io.h>
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#include <util/delay.h>
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/******************************************************************************
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 * Public function definitions.
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 ******************************************************************************/
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/**************************************************************************//**
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 * \fn int main(void)
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 *
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 * \brief Main function.
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 ******************************************************************************/
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int
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main
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(
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    void
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){
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    // Configure PB4 as input.
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    digital_io__pin_position_t input = DIGITAL_IO__PORT_B | DIGITAL_IO__PIN_4;
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    digital_io__configure_pin(input, DIGITAL_IO__DIRECTION__INPUT);
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    // Configure PB5 as output.
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    digital_io__pin_position_t output = DIGITAL_IO__PORT_B | DIGITAL_IO__PIN_5;
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    digital_io__configure_pin(output, DIGITAL_IO__DIRECTION__OUTPUT);
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    for (;;)
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    {
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        // Get input level on PB4.
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        digital_io__level_t level = digital_io__get_pin_level(input);
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        // Set output level on PB5.
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        digital_io__set_pin_level(output, level);
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        _delay_ms(250);
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    }
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    return 0;
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}