Mikroelektronika MIKROE-442 데이터 시트
mikroBasic PRO for dsPIC30/33 and PIC24
MikroElektronika
423
Expander_Write_PortAB
Expander_Set_DirectionPortA
Prototype
sub procedure Expander_Write_PortAB(dim ModuleAddress as byte, dim Data as
word)
Description The function writes word to Port Expander’s ports.
Parameters -
Parameters -
ModuleAddress
: Port Expander hardware address, see schematic at the bottom of this page
-
Data
: data to be written. Data to be written to PortA are passed in
Data
’s higher byte. Data to be
written to PortB are passed in
Data
’s lower byte
Returns
Nothing.
Requires
Port Expander must be initialized. See Expander_Init.
Port Expander’s PortA and PortB should be configured as outputs. See Expander_Set_DirectionPortA,
Expander_Set_DirectionPortB and Expander_Set_DirectionPortAB routines.
Example
‘ Write a byte to Port Expander’s PORTA and PORTB
...
Expander_Set_DirectionPortAB(0, $0000) ‘ set expander’s porta and portb
to be output
...
Expander_Write_PortAB(0, $AA55)
Notes
None.
Prototype
sub procedure Expander_Set_DirectionPortA(dim ModuleAddress, Data as byte)
Description The function sets Port Expander’s PortA direction.
Parameters -
Parameters -
ModuleAddress
: Port Expander hardware address, see schematic at the bottom of this page
-
Data
: data to be written to the PortA direction register. Each bit corresponds to the appropriate pin of
the PortA register. Set bit designates corresponding pin as input. Cleared bit designates corresponding
pin as output.
Returns
Nothing.
Requires
Port Expander must be initialized. See Expander_Init.
Example
‘ Set Port Expander’s PORTA to be output
Expander_Set_DirectionPortA(0,$00)
Notes
None.