ADLINK ACL-8216 - Manual (Page 52)

44 • C/C++ Library
5.4 _8216_DI
@ Description
This function is used to read data from digital input port. There are 16
bits of digital input on the ACL-8216. The bit 0 to bit 7 are defined as
low byte and the bit 8 to bit 15 are defined as the high byte.
@ Syntax
int _8216_DI( int port_number, unsigned char *data )
@ Argument
port_number: To indicate which port is read,
DI_LOW_BYTE
or
DI_HIGH_BYTE.
DI_LOW_BYTE: bit 0 ~ bit 7,
DI_HIGH_BYTE: bit8 ~ bit15
data: return value from digital port.
@ Return Code
ERR_NoError
ERR_BoardNoInit
ERR_PortError
@ Example
See demo program 'DI_DEMO.C'
5.5 _8216_DI _Channel
@ Description
This function is used to read data from digital input channels (bit).
There are 16 digital input channels on the ACL-8216. When performs
this function, the digital input port is read and the value of the
corresponding channel is returned.
* channel means each bit of digital input ports.
@ Syntax
int _8216_DI(int di_ch_no, unsigned int *data )
@ Argument
di_ch_no: the DI channel number, the value has
to be set from 0 to 15.
data: return value, either 0 or 1.
@ Return Code
ERR_NoError
ERR_BoardNoInit
ERR_InvalidDIChannel
@ Example
#include "8216.h"