binary and invert converion

[Ranjeet Singh]

i am sending data on serial is 3 when is display is this 3 but i can conver in bninary then become 00110011 instead 00000011.and when i invert it then i got 01100110 instead of 11111100 ,why so ?

[Karl Yamashita]

We have no idea what you're doing unless you show some code. And what is "display"?

[JTP1]

Hello. I guess you are mixing Ascii and binary coding. Ascii symbol '3' equals 51 decimal value and it is 00110011 in binary

[Ranjeet Singh]

noting in the code just sent data on serial 

[Ranjeet Singh]

void setup()

{

    Serial.begin(2400);

}

void loop()

{

   int intValue = 1234;

     Serial.println(intValue);

     delay(1000);

}

[Ranjeet Singh]

you are  right ,but how it inverting ?

[Tesla DeLorean]

It's hard to understand what you're explaining here. Show code that's sending the data, and how you determine it's inverted, like a scope or logic analyzer plot.

'3' (the character) and 3 the number are represented differently inside the computer.

Serial UART data is typically shifted least-significant bit FIRST.

Data shifted out at CMOS levels, the line is normally HIGH between bytes, and there is a LOW start bit, and a high STOP bit.

0110000001 with start and stop bits (10 clocked bits in 8N1 format)

RS232 level converters effectively invert the signal. 

[Ranjeet Singh]

how to invert it 

[RhSilicon]

---

@Ranjeet Singh wrote:

how to invert it 

---

Perhaps you are looking for this? (bitwise)

var2 = ~(val1);

STM32duino GPIO Registers and Programming

https://gist.github.com/Vitorbnc/e35f1ff1485d660edf365241dacfa387

[Ranjeet Singh]

this is just make 0 to 1 and 1 to 0 but not inverting as the Microcontroller/CRO invert