Help playing with 12bit bytes ??

[ellisp83]

Hi i was hoping sum body could help me?

i want to combine 2 bytes(4bit MSByte + 8bit LSByte) into a single 12bit bit

e.g 1000 combined with 11110000 = 100011110000

Does anyone know of ways of doing this in ASM, C or even flowcode V3?

I would really appreciate anyone's help with this matter

Thanks
Ellisp83

[JohnCrow]

Hi
Have a look at this way of using a flowchart to combine/split 2 x 8bit bytes. Hope this might help.

http://www.matrixmultimedia.com/mmforum ... ine#p24561

[medelec35]

Hi ellisp83,
I believe this is the link John is referring to:
http://www.matrixmultimedia.com/mmforum ... 618#p22618

If you get stuck after reading posts and looking at flowchart John kindly posted then we can help you further.

Martin

[JohnCrow]

Hi Martin
Id just been seaching for your post, to link to that as well

[Spanish_dude]

Hi,

Code: Select all

int _12_bit_var; // 2 bytes
char _4_bit_MSnibble = 0x08; // 1 byte, 0000 1000
char _8_bit_LSByte = 0xF0; // 1 byte, 1111 0000

_12_bit_var = ((0x0F & _4_bit_MSB) << 8) | _8_bit_LSByte;

That should do it.
If you don't understand it, read Martin's post or just ask if you still don't get it .

Nicolas

[ellisp83]

Thanks to all you guys !!!!

I am using this function to combine msbyte and lsbyte of the raw data i recieved from the SHT11 temp and humidity sensor.
So i can then perform the calculation Rhlinear = C1+C2* SOrh+C3*SOrh*
in order to get the true humidity reading to display on my LCD 16x2

Thanks to everyone again !!

Ellisp83