char s[8];//要转换成的字符数组
#define BIN(x) itoa(x,s,2)
void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  
  Serial.printf("%s\n",BIN(0x40 | 0x80));
  Serial.printf("%s\n",BIN(~(0x40 | 0x80)));
}

void loop() {
  // put your main code here, to run repeatedly:
  delay(10); // this speeds up the simulation
}