Printf statement...in ADUC-841

[selvan0201]

Hi Friends...
I am using Analog devices µC ADUC-841 for my application.I am using both adc and dac,and i am displaying the result in serial comm.window,at tat time I need 2 display only 12 bits.But it's displaying 16bits..I am using the printf statement (printf"%02BX %02BX\n",DATAH,DATAL)..Is it a correct way of displaying r anybody tell about this above statement.. Can anybody explain about the printf statement...


Thanks...In Advance...

 

[coshkun]

If you just want to display the result you can sum the datah and datal in an int variable and send it to serial port
For example

int result;
result = (DATAH««8) + DATAL;

 

[sos]

printf take the help from getchar sendchar ultimately so modify that according to what u want

 

[FvM]

With Keil C51, 16 bit values in two consecutive special function registers can be acessed by the sfr16 data type in a single C instruction. The definitions are not included in standard aduc8xx.h-files and have to be added.

sfr16 ADCDATA_L_H    = 0xD9;

12 bit data are extracted by bit mask operations, e. g. (ADCDATA_L_H & 0xfff).