Mikroelektronika MIKROE-742 데이터 시트

402

- SOFTWARE AND HARDWARE SOLUTIONS FOR EMBEDDED WORLD

CHAPTER 6

procedure SPI_Glcd_Init(DeviceAddress : 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
var SPExpanderCS  : sbit at PORTB.B1;

SPExpanderRST : 

sbit at PORTB.B0;

SPExpanderCS_Direction  : 

sbit at DDRB.B1;

SPExpanderRST_Direction : 

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);