IBM AR-B3001, Manual, Page: 27 / 41

ACROSSER TECHNOLOGY
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3.5.3 Programming With The C Driver
The AR-B3001's driver for C language is provided with
source program. This program can be compiled without
any modification by TURBO C compiler. To use this
driver with MSC, user has to replace the inport() and
outport() functions in the program with inp() and outp().
The C driver routine is saved as the file name of
"C3001lib.C" in the "C_LIB" sub-directory. The syntax of
this routine is described as bellow:
int c3001lib(int port, int channel);
Where:
int port; /* Base port address */
int channel; /* Channel number */
The returned data is within the range of -4095 to +4095.
If the analog input is out of the range of -5V to +5V, the
returned data will be -4096 or +4096.
Example:
data = c3001lib(0x3e0,0);
printf("Data = %d\n",data);
printf("Voltage = %f\n",data*5.00/4096);