// bitFunctions
// demonstrates using the bit functions
byte flags = 0; // these examples set, clear or read bits in a variable called flags.


// bitSet example
void setFlag( int flagNumber)
{
bitSet(flags, flagNumber);
}
// bitClear example
void clearFlag( int flagNumber)
{
bitClear(flags, flagNumber);
}
// bitPosition example
int getFlag( int flagNumber)
{
return bitRead(flags, flagNumber);
}
void setup()
{
Serial.begin(9600);
}
void loop()
{
showFlags();
setFlag(2); // set some flags;
setFlag(5);
showFlags();
clearFlag(2);
showFlags();
delay(10000); // wait a very long time
}
// reports flags that are set
void showFlags()
{
for(int flag=0; flag < 8; flag++)
{
if(getFlag(flag) == true)
Serial.print("* bit set for flag ");
else
Serial.print("bit clear for flag ");
Serial.println(flag);
}
Serial.println();
}