Convert Hexadecimal value to ASCII value manually

[Fan174]

How to convert Hexadecimal value to ASCII value Manually

For example, Value = 0x6B

If I send 0x6B to LCD. It should show 0x6B not k on the screen.

 

[barry]

If you send 0x6B to the LCD, you're sending the ASCII code for “k”.

If you want to display “0x6B“, you need to send 4 ASCII characters. 0x6B==>0x30, 0x78, 0x36, 0x38.

 

[kgavionics]

The actual value is stored in binary, not in hex. If you want to display it in hex, a conversion that has to be made! Is that what you want?

 

[Fan174]

If you send 0x6B to the LCD, you're sending the ASCII code for “k”.

If you want to display “0x6B“, you need to send 4 ASCII characters. 0x6B==>0x30, 0x78, 0x36, 0x38.

Thanks how did you know that 4 ASCII characters have to be sent ? What's the logic behind this ?
Why magical numbers 0x30, 0x78, 0x36, 0x38.? What's the logic behind this ?

 

[KlausST]

Thanks how did you know that 4 ASCII characters have to be sent ? What's the logic behind this ?
Why magical numbers 0x30, 0x78, 0x36, 0x38.? What's the logic behind this ?

... because you expect the display to show 4 characters.

The display works with ASCII coded characters. In C you have to use a "string" as variable.
0x6B (barry accidentally misread the "B" as "8". I´ve corrected this here)
are 4 characters "0x6B":
0: has the ASCII code 0x30, or "0" as string or '0' as single character
x: has the ASCII code 0x78 , or "x" as string or 'x' as single character
6: has the ASCII code 0x36, or ... see above
B: has the ASCII character 0x42, or ... see above

Please do an internet search for "ASCII table".
While ASCII is a standard, your display may use non standard codes.
Thus even better: read the datasheet of your display. (we professionals have to do this, too)

There are libraries for every language that do this for you.

Klaus