Mikroelektronika MIKROE-350 Fiche De Données

292

- SOFTWARE AND HARDWARE SOLUTIONS FOR EMBEDDED WORLD

CHAPTER 6

sub function Expander_Read_PortA(dim ModuleAddress as byte) as byte

Byte read.

The function reads byte from Port Expander's PortA.

Parameters : 

- 

ModuleAddress:

Port Expander hardware address, see schematic at the 

bottom of this page 

Port Expander must be initialized. See Expander_Init.

Port Expander's PortA should be configured as input. See Expander_Set_Direc-
tionPortA and Expander_Set_DirectionPortAB routines.

' Read a byte from Port Expander's PORTA
dim read_data as byte
...
Expander_Set_DirectionPortA(0,0xFF)        ' set expander's porta
to be input

...
read_data = Expander_Read_PortA(0)

sub function Expander_Read_PortB(dim ModuleAddress as byte) as byte

Byte read.

The function reads byte from Port Expander's PortB.

Parameters : 

- 

ModuleAddress:

Port Expander hardware address, see schematic at the 

bottom of this page 

Port Expander must be initialized. See Expander_Init.

Port Expander's PortB should be configured as input. See Expander_Set_Direc-
tionPortB and Expander_Set_DirectionPortAB routines.

' Read a byte from Port Expander's PORTB
dim read_data as byte
...
Expander_Set_DirectionPortB(0,0xFF)        ' set expander's portb
to be input

...

read_data = Expander_Read_PortB(0)