st7529.c

at91sam9260 lcd驱动st7529

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/mman.h>

#include "st7529.h"
//#include "gpio.h"

unsigned char lcd1[] = 
	{
		#include "lcd1.dat"
	};

unsigned char lcd2[] = 
	{
		#include "lcd2.dat"
	};
	
unsigned char lcd3[] = 
	{
		#include "lcd3.dat"
	};

void write_data(unsigned char data)
{
	ioctl(lcd_fd, LCD_WRITE_DATA, &data);
}

unsigned char read_data(unsigned char data)
{
	ioctl(lcd_fd, LCD_READ_DATA, &data);
	return data;
}
void write_cmd(unsigned char cmd)
{
	ioctl(lcd_fd, LCD_WRITE_CMD, &cmd);
}

void lcd_reset(void)
{

	ioctl(lcd_fd, LCD_RESET,0);
	
}

void lcd_backlight(unsigned char light)
{

	ioctl(lcd_fd, LCD_BACK_LIGHT,&light);
	
}

void lcd_init(void)
{
	write_cmd(CMD_EXT_MODE_OFF);	// EXT=0

	write_cmd(CMD_SLEEP_OUT);		// SLEEP OUT
	write_cmd(CMD_OSC_ON);		// INTERNAL OSCILLATION ON

	write_cmd(CMD_PWR_CTRL);		// POWER CONTROL SET
	write_data(0x08);				// TURN ON BOOSTER first;
	
	usleep(10000);	//10ms
	
	write_cmd(CMD_PWR_CTRL);		// POWER CONTROL SET
	write_data(0x0B);				// TURN ON BOOSTER AND REFERENCE VOLTAGE GENERATION CIRCUIT ;0bh

	write_cmd(CMD_VOL_CTRL);		// (0x81) REFERENCE VOLTAGE SELECT MODE 
#ifdef	LCD_1
	write_data(0x0a);				// REFERENCE VOLTAGE PARAMETER ;16
	write_data(0x05);				// SET REFERENCE VOLTAGE PARAMETER ;04
#else
	write_data(0xA0);
	write_data(0x04);
#endif	

	write_cmd(CMD_DISPLAY_CTRL); 	// DISPLAY CONTROL 
	write_data(0x00);				// CL DIVIDING RATIO ,F1 AND F2 DRIVE PATTERN
	write_data(0x27);				// DRIVER DUTY 1/160
	write_data(0x00);				// FR INVERSE-SET VALUE 16

	write_cmd(CMD_DISPLAY_NORMAL );  // DISPLAY NORMAL(0xA6)

	write_cmd(CMD_COM_SCAN); 		// (0xBB)C0M0-->COM79,C0M159-->COM81
#ifdef	LCD_1
	write_data(0x02); 
#else
	write_data(0x01);
#endif
	
	write_cmd(CMD_DATASCN_DIRECTION); // (0xBC)data scan direction
	
#ifdef	LCD_1
	write_data(0x02);     //inverse mode
	write_data(0x01);     //p3p2p1...
#else
	write_data(0x01);
	write_data(0x00);
#endif
	write_data(0x02);     //3B3P


	write_cmd(CMD_LINEADDR_SET); 	//(0x75)line address set
	write_data(0x00);                             //start line
	write_data(0x9f);                              //end line

	write_cmd(CMD_COLADD_SET);		//(0x15) SET COLUMN ADDRESS 
#ifdef	LCD_1
	write_data(0x1f);// START COLUMN
	write_data(0x54);// ENDCOLUMN
#else
	write_data(0x0F);
	write_data(0x44);
#endif

	write_cmd(CMD_EXT_MODE_ON); // EXT=1

	//==================================================== 
	write_cmd(CMD_SET_GRAY1);// SET GRAY VALUE

	write_data(0X00);// START PARA00
	write_data(0X03);// START PARA03 
	write_data(0X06);// START PARA06
	write_data(0X09);// START PARA09

	write_data(0X0B);// START PARA
	write_data(0X0D);// START PARA
	write_data(0X0E);// START PARA 
	write_data(0X0F);// START PARA
	 
	write_data(0X10);// START PARA
	write_data(0X11);// START PARA
	write_data(0X12);// START PARA 
	write_data(0X14);// START PARA

	write_data(0X16);// START PARA
	write_data(0X18);// START PARA
	write_data(0X1B);// START PARA 
	write_data(0X1F);// START PARA

	write_cmd(CMD_SET_GRAY2);// SET GRAY VALUE

	write_data(0X00);// START PARA00
	write_data(0X03);// START PARA03 
	write_data(0X06);// START PARA06
	write_data(0X09);// START PARA09

	write_data(0X0B);// START PARA
	write_data(0X0D);// START PARA
	write_data(0X0E);// START PARA 
	write_data(0X0F);// START PARA
	 
	write_data(0X10);// START PARA
	write_data(0X11);// START PARA
	write_data(0X12);// START PARA 
	write_data(0X14);// START PARA

	write_data(0X16);// START PARA
	write_data(0X18);// START PARA
	write_data(0X1B);// START PARA 
	write_data(0X1F);// START PARA

	write_cmd(CMD_ANA_SET);		// ANALOG CIRCUIT SET 
	write_data(0x00);				// OSC FREQUENCEY ADJUSTMENT
	write_data(0x01);				// BOOSTER EFFICIENCY SET
	write_data(0x00);				// BIAS SETTING 1/14

	write_cmd(CMD_SOFT_INIT);		// DITHERER OFF

	write_cmd(CMD_EXT_MODE_OFF); 	// EXT=0
	write_cmd(CMD_DISPLAY_ON); 		// display on;
}
///////////////////////////////////////////////////设置XY坐标//////////////////////////////////////////////////////
void set_addr(unsigned char x_pos,unsigned char y_pos)
{
  
	write_cmd(0X30);   //EXT=0
      
	write_cmd(0X75);   //THIRD  COMMAND SET LINE ADDRESS
	write_data(x_pos);  //START LINE
	write_data(159);    //END   LINE
      
	write_cmd(0X15);   //THIRD  COMMAND SET COLUMN ADDRESS
	write_data(y_pos);  //START COLUMN 
	write_data(0x53);  //END   COLUMN
          
}
//////////////////////在坐标XY处开始写入1个点的数据，并且保持处于这列中的其它两个值不变////////////////////////
void write_xy(unsigned char x_pos, unsigned char y_pos, unsigned char data)
{
	unsigned char i, l, j;
	unsigned char mem=0;
	unsigned char data1, data2, data3, col=0, set=0;
	unsigned int  count=0;
     
	i = l = j = 0;
	
	col = y_pos/3;				//[得到Y轴上的列，一些写一个列，一个列里包含3个数据]
	set = y_pos%3;			//[得到块上3个点中的一个]
	
	set_addr( x_pos, col );  	//[因为选择了行不变，而列由3个竖条小列组成，所以一次要写3个点]

	write_cmd(0x5D);       //从RAM内读坐标的值   

	read_data(data1);  //[空读一个头数据]

	data1 = read_data(data1);   //[读取原来的3个点的值]
	data2 = read_data(data2);
	data3 = read_data(data3);
  
	set_addr(x_pos, col);  //在指定坐标的RAM内写入显示值
	
	write_cmd(0x5C);
	
	switch(set)
	{
		case 0:
			data1 = data;
			break;
		case 1:
			data2 = data;
			break;
		case 2:
			data3 = data;
			break;
	}
     
	write_data(data1);    //[写入新点的值，并且保持原来两个点的值不变]
	write_data(data2);
	write_data(data3);
         
}
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////
char display(unsigned char start_x, unsigned char start_y, const unsigned char data[], unsigned char wide, unsigned char height)
{
	unsigned char line=0, col=0;
	unsigned int pos=0;
	
	if( (start_x + wide)>160 || ((start_y + height) >160) )    /*显示边界*/
	{
		return -1;    
	}
    
	for(line=0; line<height; line++)
	{
		for(col=0; col<wide; col++)
		{
			if( (data[(pos>>3)] & (1<<(7-(col%8)))) >0)
			{
				write_xy(start_x + col, start_y + line, 0xff);
			}
			pos++;
		}
		
	}
    
	return 0;
}
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////
void display_bmp(const unsigned char *pic)
{
	unsigned int i, j, k;

	write_cmd(CMD_MEM_WRITE);	//DATA WRITE 
	
	for(j=0; j<160; j++)
	{
		write_data(0x00);
		
		write_data(0x00);
		
		for(i=0; i<160/8; i++)
		{
			for(k=0; k<8;++k)
			{
				if(pic[j*20+i]&(0x80>>k))
					write_data(0x00);
				else
					write_data(0xff);
			}
		}
	}
}

///////////////////////////////////////////////////////////////////////////////////////////////////////////////////
int main (void)
{
	lcd_fd = open("/dev/at91_lcd", O_RDWR);
	
	if ( lcd_fd == -1 )
	{
		printf("Error Opening at91_lcd. \n");
		return -1;
	}
	
	lcd_reset();
	sleep(1);
	
	
	lcd_init();
	
	while(1)
	{
		display_bmp(lcd1);
		
		sleep(1);
		
		display_bmp(lcd2);
		
		sleep(1);
		
		display_bmp(lcd3);
		
		sleep(1);
		
	}
	
	lcd_backlight(0);
	sleep(1);
	lcd_backlight(1);
	
	close(lcd_fd);
}