how to combine two 8 bit registers into a 16 bit variable

[bpramod]

hi friends....
i m using TH0 and TL0 in my program..at the end i need to combine the values of TH0 and TL0 in 16 bit variable...plz tell me wat is logic

 

[bigdogguru]

Here is the basic technique:

unsigned int tvalue = 0x00;

tvalue = TH0;  // Insert the TH0 byte into the lower byte of tvalue
tvalue <<= 8;  // Left shift the lower byte into the higher byte of tvalue
tvalue += TL0; // Insert the TL0 byte into the lower byte of tvalue

You can combine a few of these steps together, however this should give the general idea of how to accomplish the task.

BigDog

 

[alexan_e]

16bit_var= (TH0<<8) | TL0;

Alex

---------- Post added at 09:31 ---------- Previous post was at 09:26 ----------

I think the above works five but just in case you may want to add typecasting too

16bit_var= ((unsigned int)TH0<<8) | TL0;

Alex