Noob question about bit and byte

[Manu]

Hi,

I have a clue about doing tests on a bit in a byte

byte mot4 = frame.buf[4];
    Serial.print("buff 4 : "); Serial.println (mot4, BIN);
    if ((mot4 & 0x04) == 1) {
      resetCPU();
    }
    if ((mot4 & 0x08) == true) {      
      razconfModule();
      return;
    }

In this example, I try to look if bit 3 is set in byte "mot4" and do something. to do the test I use

if ((mot4 & 0x04) == 1)

But it doesn't operate.
Can someone point me to my problem ?

I know that something like

if ((mot4 >> 3) & 1U) == 1)

can work, but the first method should too ?

Thanks,
Manu

 

[WMXZ]

if ((mot4 & 0x04) == 0x04)

should work

 

[Manu]

Thank, it does

 

[Vam]

Alternatively, != 0 will also work for all these scenarios (or relying on the truthiness of non-zero integers: if (mot4 & 0x04) will also work).