Write following code section to C Program Structure: declare ButtonState; // Glo

Question

Write following code section to C

Program Structure: declare ButtonState; // Global variable holding status of button unsigned long ButtonTime; 1/ Holds time to debounce Switch int ButtonNextState( input) // function that is to be called in loop to service the switch switch based on ButtonState Idle: /7 State where nothing has been happening. if input is low, ButtonTime-millis I/ Record time of high to low transition set ButtonState to Wait // Move to Wait state. Turn on LED // Pin 13 high used for debugging Wait: /7 Button has gone low and we are waiting for it to remain low for 5 milliseconds if input is high, 1/ If button has gone high, set ButtonState to Idle // Reset back to Idle. else if (millis () -time 5 // if 5 milliseconds has passed set ButtonState to Low // Move to low state. Turn off LED // Pin 13 low also used for debugging). return 1 // indicating that button has been pressed. Low: // Button is low and has been so for 5 milliseconds if input is high // Once button released. set ButtonState to Idle: end of switch return 0 /1 By default return 0 indicating nothing is happening SetUp: // Function run at the start of the program. Set pin as input. // Check Schematic in Lab 4 for pin number. Set ButtonState to Idle. // Initialize state Loop: // Function continuously called // Check status of button f( ButtonNextState ( digitalRead( input ) ) // switch is connected to pin 4. end of if Send serial message indicating button press / Indicate button has been pressed. Lab Assignment: Prelab: Write the program described in the program section. You are required to use the function call approach described above. You will need to read the button in later labs.

Explanation / Answer

Hi, Here comment and output is not nessesory so I put only code in c.

#include <stdio.h>

#define Idle 0

#define Wait 1

#define Low 2

#define HIGH 1

#define LOW 0

int ButtonState ;

unsigned long ButtonTime;

int Led = 0 ;

int ButtonNextState(int input)

{

switch(ButtonState)

{

case Idel:

if(input == LOW)

{

ButtonTime = millis();

ButtonState = Wait;

Led = 1;

}

break;

case Wait:

if(input == HIGH)

ButtonState = Idle;

else if(millis()-time >= 5)

{

ButtonState = Low;

Led = 0;

return 1;

}

break;

case Low:

if( input == HIGH )

ButtonState = Idle;

break;

}

return 0;

}

int main()

{

int pin = 1; // assuming 1 as a input and 0 as a output

ButtonState = Idle;

while(1)

{

if(ButtonNextState(digitalRead(input)))

printf("Button pressed ");

}

}

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