Hi
Please I got this message while trying to verify my code expected identifier before '(' token
here is the full code below
/Exercise5:Turn on LED when the button is pressed and keep it on after it is released including simple debouncing.if the button is held
brightness changes/
#define LED 9 //the pin for the LED
#define BUTTON 7 //input pin where pushbutton is connected
int val= 0; //stores state of input pin
int old_val=0; //stores the previous value of val
int state = 0; //0=LED off while 1=LED on
int brightness = 128; //stores the brightness value
unsigned long startTime=0; //when did we begin pressing?
void setup()
{
pinMode(LED,OUTPUT) ; //tell arduino LED is an output
pinMode(BUTTON,INPUT); //and BUTTON is an input
}
void loop()
{
val=digitalRead(BUTTON); //read input value and store it
//check if there was a transition
if ((val==HIGH) && (old_val==LOW))
{
state=1-state; //change the state from off to on or viceversa
startTime= millis(); //millis() is the Arduino clock
//it returns how many milliseconds have passed since the board has been reset
//this line remembers when the button was last pressed
delay(10);
}
//check whether the button is being held down
if (val==HIGH) && (old_val==HIGH))
{
//if the button is held for more than 500ms
if (state==1 && (millis() -startTime) > 500)
{
brightness ++ ; //increment brightness by 1
delay(10); //delay to avoid brightness going up too fast
if (brightness > 255)
{
//255 is the max brightness
brightness=0; //if we go over 255 lets go back to 0
}
}
}
old_val = val ; //val is now old lets store it
if (state==1) {
analogWrite(LED,BRIGHTNESS); //turn LED on at current brightness level
}
else
{
analogWrite(LED,0); //turn LED OFF
}
}
I'm a Newbie on this..please any help
Thanks!!
