Mikroelektronika MIKROE-742 데이터 시트

This example demonstrates how to communicate Lcd via the SPI module, using
serial to parallel convertor MCP23S17.

program SPI_Lcd;

var text : array[16] of char;

// Port Expander module connections
var SPExpanderRST : sbit at PORTB.B0;

SPExpanderCS  : 

sbit at PORTB.B1;

SPExpanderRST_Direction : 

sbit at DDRB.B0;

SPExpanderCS_Direction  : 

sbit at DDRB.B1;

// End Port Expander module connections

text := 'mikroElektronika';
// If Port Expander Library uses SPI1 module

SPI1_Init();                           // Initialize SPI module

used with PortExpander

Spi_Rd_Ptr := @SPI1_Read;              // Pass pointer to SPI Read

function of used SPI module

// If Port Expander Library uses SPI2 module

// SPI2_Init();                        // Initialize SPI module

used with PortExpander

// Spi_Rd_Ptr = @SPI2_Read;            // Pass pointer to SPI Read

function of used SPI module

SPI_Lcd_Config(0);           // Initialize Lcd over SPI interface

SPI_Lcd_Cmd(LCD_CLEAR);                // Clear display
SPI_Lcd_Cmd(LCD_CURSOR_OFF);           // Turn cursor off

SPI_Lcd_Out(1,6, 'mikroE');            // Print text to Lcd, 1st

row, 6th column

SPI_Lcd_Chr_CP('!');                   // Append '!'

SPI_Lcd_Out(2,1, text); // Print text to Lcd, 2nd row, 1st column

end.

420

- SOFTWARE AND HARDWARE SOLUTIONS FOR EMBEDDED WORLD

CHAPTER 6