User`s guide

C/C++ Library for DOS • 37
5.4 _8111_DI
@ Description
This function is used to read data from digital input port. There are
16-bit digital inputs on the ACL-8111. 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 _8111_DI( int port_number, unsigned char *data )
@ Argument:
port_number: To indicate which port is read, DI_LO_BYTE
or DI_HI_BYTE.
DI_LO_BYTE: bit 0 ~ bit 7,
DI_HI_BYTE: bit8 ~ bit15
data: return value from digital port.
@ Return Code:
ERR_NoError
ERR_BoardNoInit
ERR_PortError
@ Example:
See Demo program . Demo Program 'DI_DEMO.C'