Mikroelektronika MIKROE-724 データシート

mikroBasic PRO for dsPIC30/33 and PIC24

MikroElektronika

423

Expander_Write_PortAB

Expander_Set_DirectionPortA

sub procedure Expander_Write_PortAB(dim ModuleAddress as byte, dim Data as 

word)

Description The function writes word to Port Expander’s ports.
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 

Nothing.

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.

...

Expander_Set_DirectionPortAB(0, $0000)    ‘ set expander’s porta and portb 

...

Expander_Write_PortAB(0, $AA55)

None.

sub procedure Expander_Set_DirectionPortA(dim ModuleAddress, Data as byte)

Description The function sets Port Expander’s PortA direction.
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. 

Nothing.

Port Expander must be initialized. See Expander_Init.

Expander_Set_DirectionPortA(0,$00)

None.