lc75823.c

液晶驱动LC75823的驱动程序源代码

#include "common.h"
#include "lc75823.h"
#include "io.h"
#include "timer.h"

#ifdef LC75823

extern UINT   g_lcd_grid_buffer[];


void LC75823_Write_Buffer()
{
	UINT temp;
	UCHAR i,j,chip_address=LC75823_ADDRESS;

	LCD_STB=0;

	//send chip address
	for(i=0;i<8;i++)
	{
		LCD_CLK=0;
		if(chip_address&0x01)//LSB
			LCD_DATA=1;
		else
			LCD_DATA=0;
		chip_address>>=1;
		LCD_CLK=1;
	}

	LCD_STB=1;

	//send data buffer
	for (j=0;j<LCD_BUFFER_SIZE;j++)
	{
		temp=g_lcd_grid_buffer[j];
		
		if (j==LCD_BUFFER_SIZE-1)
		{
			temp&=0xfff;//last 4 bits is DR,SC BU and *;
		}	
		
		for(i=0;i<16;i++)
		{
			LCD_CLK=0;
			if(temp&0x0001)//LSB
				LCD_DATA=1;
			else
				LCD_DATA=0;
			temp >>= 1;
			LCD_CLK=1;
		}
		
	}

	LCD_STB=0;
	LCD_DATA=1;
	LCD_CLK=1;
	
}

#endif