Mikroelektronika MIKROE-350 データシート

391

- SOFTWARE AND HARDWARE SOLUTIONS FOR EMBEDDED WORLD

CHAPTER 6

sub procedure SPI_Glcd_Init(dim DeviceAddress as byte)

Nothing.

Initializes the Glcd module via SPI interface.

Parameters : 

- 

DeviceAddress:

SPI expander hardware address, see schematic at the 

bottom of this page 

Global variables : 

- 

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 SPI1_Init and SPI1_Init_Advanced routines. 

' port expander pinout definition
dim SPExpanderCS as sbit at PORTB.B1

SPExpanderRST 

as sbit at PORTB.B0

SPExpanderCS_Direction 

as sbit at DDRB.B1

SPExpanderRST_Direction 

as sbit at DDRB.B0

...

' If Port Expander Library uses SPI1 module :
SPI1_Init_Advanced(_SPI_MASTER, _SPI_FCY_DIV2, _SPI_CLK_HI_TRAIL-
ING)  ' Initialize SPI module used with PortExpander
SPI_Rd_Ptr = @SPI1_Read                ' Pass pointer to SPI

Read function of used SPI module
SPI_Glcd_Init(0)