Mikroelektronika MIKROE-724 データシート

mikroBasic PRO for dsPIC30/33 and PIC24

MikroElektronika

419

Expander_Init_Advanced

sub  procedure  Expander_Init_Advanced(dim  byref  rstPort,  rstPin,  haen  as 

byte)p> 

Description Initializes Port Expander using SPI communication.
Parameters - 

rstPort

: Port Expander’s reset port 

- 

rstPin

: Port Expander’s reset pin 

- 

haen

: Port Expander’s hardware address 

Nothing.

- 

SPExpanderCS

: Chip Select line 

- 

SPExpanderRST

: Reset line 

- 

SPExpanderCS_Direction

: Direction of the Chip Select pin 

- 

SPExpanderRST_Direction

: Direction of the Reset pin 

must be defined before using this function. 

SPI module needs to be initialized. See SPIx_Init and SPIx_Init_Advanced routines. 

dim SPExpanderRST as sbit at LATF0_bit

    SPExpanderCS  as sbit at LATF1_bit

    SPExpanderRST_Direction as sbit at TRISF0_bit

    SPExpanderCS_Direction  as sbit at TRISF1_bit

SPI1_Init()               ‘ initialize SPI module

Expander_Init_Advanced(PORTB, 0, 0) ‘ initialize Port Expander

None.

Expander_Read_Byte

sub function Expander_Read_Byte(dim ModuleAddress, RegAddress as byte) as 

Description The function reads byte from Port Expander.
Parameters - 

ModuleAddress

: Port Expander hardware address, see schematic at the bottom of this page 

- 

RegAddress

: Port Expander’s internal register address 

Byte read.

Port Expander must be initialized. See Expander_Init.

dim read_data as byte

...

read_data = Expander_Read_Byte(0,1)

None.