CK_Code

void setup()
{
  Serial.begin(115200);
}

void loop()
{
  unsigned char ch = 0xFF & 0x80;
  int i;
  for (i = 0; i <= 8; i++, ch = ch >> 1)
  {
    //  printf("i=%d:valor:%d\n", i, ch);
    Serial.print("i :");
    Serial.print(i);
    Serial.print("  ch :");
    Serial.println(ch);
  }
  Serial.println( );
  delay(300);