Datasheet

Expander_Read_PortAB
357
MIKROELEKTRONIKA - SOFTWARE AND HARDWARE SOLUTIONS FOR EMBEDDED WORLD
Libraries
mikroC PRO for AVR
CHAPTER 6
Prototype
unsigned int Expander_Read_PortAB(char ModuleAddress);
Returns Word read.
Description
The function reads word from Port Expander's ports. PortA readings are in the
higher byte of the result. PortB readings are in the lower byte of the result.
Parameters :
- ModuleAddress: Port Expander hardware address, see schematic at
the bottom of this page
Requires
Port Expander must be initialized. See Expander_Init.
Port Expander's PortA and PortB should be configured as inputs. See
Expander_Set_DirectionPortA, Expander_Set_DirectionPortB and
Expander_Set_DirectionPortAB routines.
Example
// Read a byte from Port Expander's PORTA and PORTB
unsigned int read_data;
...
Expander_Set_DirectionPortAB(0,0xFFFF); // set expander's
porta and portb to be input
...
read_data = Expander_Read_PortAB(0);