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刚刚从网址邮购处买到3310的液晶显示。试了一下，感觉很好，屏幕很清晰，很适合自己做点小项目。参考网站上的例子，用WINAVR(2005/02/14) 重新写了一个驱动，贴出来与大家共享。
网站上的例子, 初始化当中有一点DUG，提出来与大家讨论:
1. PB4当作RES的控制脚不妥当，因为在SPI下，PB4只能是输入，作输出控制RES不妥。
2. 屏幕的最上面一行，显示不停滚动的中文：“欢迎光临本网站！” 好像后面还跟一些乱码(不知是否WINAVR的原因)。我在程序中改变了一下，现在正常了。
//NokiaLCD.h
/***********************************************************************************
Name : NokiaLCD.h
Description : Header file for Nokia 84x48 graphic LCD driver.
Author : 2005-06-24 - TestCode
Compiler : WINAVR Version: 20050214
************************************************************************************/
#ifndef NOKIALCD_INCLUDED
#define NOKIALCD_INCLUDED
#include <avr/pgmspace.h>
#define LCD_X_RES (84)
#define LCD_Y_RES (48)
#define LCD_Array_SIZE ((LCD_X_RES * LCD_Y_RES) / 8)
#define LCD_DC_PORT PORTB // LCDµÚ4½Å£¬ Mega32£ºPB1 µÚ2½Å
#define LCD_DC_DDR DDRB
#define LCD_DC_BIT_NUM (1)
#define LCD_CE_PORT PORTB // LCDµÚ5½Å£¬ Mega32£ºPB0 µÚ1½Å
#define LCD_CE_DDR DDRB
#define LCD_CE_BIT_NUM (0)
#define LCD_RST_PORT PORTA // LCDµÚ8½Å£¬ Mega32£ºPA2 µÚ3½Å
#define LCD_RST_DDR DDRA
#define LCD_RST_BIT_NUM (2)
/*****************************************************************************
* SPI Definitions
*/
#define SPI_PORT PORTB
#define SPI_DDR DDRB //Data direction register
#define SPI_PIN PINB //Port used for SPI
#define SPI_SS_NUM (4) //SPI Slave select, must be set as output
#define SPI_MOSI_NUM (5) //SPI CPU master output
#define SPI_MISO_NUM (6) //SPI CPU master input
#define SPI_SCK_NUM (7) //SPI clock, CPU master
#define delay_1us() _delay_us(1)
#define delay_1ms() _delay_ms(1)
#ifndef BIT
#define BIT(x) (1 << (x))
#endif
enum {LCD_CMD = 0, LCD_DATA = 1};
class NokiaLcd{
private:
unsigned char LcdRow,LcdCol;
void InitLCDSPI(void);
public:
NokiaLcd(unsigned char mRow = LCD_Y_RES,
unsigned char mCol= LCD_X_RES);
void LCD_init(void);
void LCD_clear(void);
void LCD_set_XY(unsigned char X, unsigned char Y);
void LCD_write_string(unsigned char X,unsigned char Y,char *s);
void LCD_write_chinese_string(unsigned char X, unsigned char Y,
unsigned char ch_with,unsigned char num,
unsigned char line,unsigned char row);
void LCD_move_chinese_string(unsigned char X, unsigned char Y, unsigned char T);
void LCD_write_char(unsigned char c);
void LCD_draw_bmp_pixel(unsigned char X,unsigned char Y,PGM_P map,
unsigned char Pix_x,unsigned char Pix_y);
void LCD_write_byte(unsigned char data, unsigned char dc);
void delay_nus(unsigned int n);
void delay_nms(unsigned int n);
};
#endif
/////////////////////////////////////////////////////////////////////////////////
//NokiaLCD.c
/****************************************************************************
Name : NokiaLCD.c
Description : This is a driver for the Nokia 84x48 graphic LCD.
Author : 2005-06-24 - TestCode
Compiler : WINAVR Version: 20050214
*****************************************************************************/
#include <avr/io.h>
#include <avr/delay.h>
#include "NokiaLCD.h"
#include "english_6x8_pixel.h"
#include "move_chinese_string_pixel.h"
#include "write_chinese_string_pixel.h"
NokiaLcd::NokiaLcd(unsigned char mRow, unsigned char mCol)
: LcdRow(mRow),
LcdCol(mCol)
{
InitLCDSPI();
LCD_init();
}
/*****************************************************************************
* WriteReadSPI: Send character to SPI and return character read back
*/
void NokiaLcd::InitLCDSPI(void)
{
//Set SPI ports as output
SPI_DDR |= SPI_DDR|(1<<SPI_SCK_NUM)|(1<<SPI_MOSI_NUM)|(1<<SPI_SS_NUM);
SPI_PORT = SPI_PORT & (~(1<<SPI_MISO_NUM)); //Turn off pull-up
/* Enable SPI, Master, set clock rate fck/16 */
SPSR |= (1<<SPI2X); // ÉèÖÃSPIʱÖÓ±¶ËÙ
SPCR |= (1<<SPE)|(1<<MSTR); // ʹÄÜSPI½Ó¿Ú£¬Ö÷»úģʽ£¬4MʱÖÓ
}
/*-----------------------------------------------------------------------
Name : LcdInit
Description : Performs MCU SPI & LCD controller initialization.
-----------------------------------------------------------------------*/
void NokiaLcd::LCD_init(void)
{
_delay_ms(30); //30ms power on delay
LCD_DC_DDR |= (1<<LCD_DC_BIT_NUM); //Set DC pin as output
LCD_CE_DDR |= (1<<LCD_CE_BIT_NUM); //Seet Ce pin as output
LCD_RST_DDR |= (1<<LCD_RST_BIT_NUM);//Set reset pin as output
//Toggle display reset pin.
LCD_RST_PORT &= ~(1<<LCD_RST_BIT_NUM);//LCD reset low
delay_1us(); //delay 1us
LCD_RST_PORT |= (1<<LCD_RST_BIT_NUM);
LCD_CE_PORT &= ~(1<<LCD_CE_BIT_NUM);
delay_1us();
LCD_CE_PORT |= (1<<LCD_CE_BIT_NUM);
delay_1us();
LCD_write_byte(0x21, LCD_CMD); // LCD Extended Commands.
LCD_write_byte(0xc8, LCD_CMD); // Set LCD Vop (Contrast).
LCD_write_byte(0x06, LCD_CMD); // Set Temp coefficent.
LCD_write_byte(0x13, LCD_CMD); // LCD bias mode 1:48.
LCD_write_byte(0x20, LCD_CMD); // LCD Standard Commands, Horizontal addressing mode
LCD_clear(); // Lcd clear screen
LCD_write_byte(0x0c, LCD_CMD); // LCD Standard Commands, Horizontal addressing mode
LCD_CE_PORT &= ~(1<<LCD_CE_BIT_NUM); // Deselect Lcd
}
/*-----------------------------------------------------------------------
Name : LCD Clear Screen
Description : LcdClear Screen
-----------------------------------------------------------------------*/
void NokiaLcd::LCD_clear(void)
{
unsigned int i;
LCD_write_byte(0x0c, LCD_CMD);
LCD_write_byte(0x80, LCD_CMD);
for (i=0; i<504; i++)
LCD_write_byte(0, LCD_DATA);
}
/*-----------------------------------------------------------------------
Name : LCD_set_XY
Description : Set Lcd X(Page) Y(Column) position
-----------------------------------------------------------------------*/
void NokiaLcd::LCD_set_XY(unsigned char X, unsigned char Y)
{
LCD_write_byte(0x40 | Y, LCD_CMD); // column
LCD_write_byte(0x80 | X, LCD_CMD); // row
}
/*-----------------------------------------------------------------------
Name : LCD_write_char
Description : Display one ASCII character
-----------------------------------------------------------------------*/
void NokiaLcd::LCD_write_char(unsigned char c)
{
unsigned char line;
c -= 32;
LCD_write_byte(0x00,LCD_DATA);
for (line=0; line<5; line++)
LCD_write_byte(pgm_read_byte(&font6x8[c][line]), LCD_DATA);
}
/*-----------------------------------------------------------------------
Name : LCD_writeString
Description : Write English string to Lcd Screen
-----------------------------------------------------------------------*/
void NokiaLcd::LCD_write_string(unsigned char X,unsigned char Y,char *s)
{
LCD_set_XY(X,Y);
while (*s)
{
LCD_write_char(*s);
++s;
}
}
/*-----------------------------------------------------------------------
Name : LCD_write_chinese_string
Description : Write chinese character string to LCD Screen
Argument(s) : X, Y -> Coordinate for new cursor position.
ch_with -> Chinese Character width
num -> number of characters to display
line -> start line of the chinese character
row ->Space lines between each char
-----------------------------------------------------------------------*/
void NokiaLcd::LCD_write_chinese_string(unsigned char X, unsigned char Y,
unsigned char ch_with,unsigned char num,
unsigned char line,unsigned char row)
{
unsigned char i,n;
LCD_set_XY(X,Y); //ÉèÖóõʼλÖÃ
for (i=0;i<num;)
{
for (n=0; n<ch_with*2; n++) //дһ¸öºº×Ö
{
if (n==ch_with) //дºº×ÖµÄÏ°벿·Ö
{
LCD_set_XY((X+(ch_with+row)*i),Y+1);
}
LCD_write_byte(pgm_read_byte(&write_chinese_string[line+i][n]),LCD_DATA);
}
i++;
LCD_set_XY((X+(ch_with+row)*i),Y);
}
}
/*-----------------------------------------------------------------------
Name : LCD_move_chinese_string
Description : move the chinese string line on the screen;
Argument(s) : X, Y -> Coordinate for new cursor position.
T -> moving speed
-----------------------------------------------------------------------*/
void NokiaLcd::LCD_move_chinese_string (unsigned char X, unsigned char Y, unsigned char T)
{
unsigned char i,n,j=0;
unsigned char buffer_h[84]={0};
unsigned char buffer_l[84]={0};
for (i=0; i<96; i++)
{
buffer_h[83] = pgm_read_byte(&move_chinese_string[i/12][j]);
buffer_l[83] = pgm_read_byte(&move_chinese_string[i/12][j+12]);
j++;
if (j==12) j=0;
for (n=0; n<83; n++)
{
buffer_h[n]=buffer_h[n+1];
buffer_l[n]=buffer_l[n+1];
}
LCD_set_XY(X,Y);
for (n=0; n<83; n++)
{
LCD_write_byte(buffer_h[n],LCD_DATA);
}
LCD_set_XY(X,Y+1);
for (n=0; n<83; n++)
{
LCD_write_byte(buffer_l[n],LCD_DATA);
}
delay_nms(T);
}
}
/*-----------------------------------------------------------------------
Name : LCD_draw_bmp_pixel
Description : draw a picture on the Lcd screen
Argument(s) : X, Y -> start position on thelcd screen
map ->picture array on the flash
Pix_x ->picture height (pixes)
Pix_y ->picture width (pixes)
-----------------------------------------------------------------------*/
void NokiaLcd::LCD_draw_bmp_pixel(unsigned char X,unsigned char Y,PGM_P map,
unsigned char Pix_x,unsigned char Pix_y)
{
unsigned int i,n;
unsigned char row;
if (Pix_y%8==0) row=Pix_y/8; //Cal. the total page numbers
else
row=Pix_y/8+1;
for (n=0;n<row;n++)
{
LCD_set_XY(X,Y);
for(i=0; i<Pix_x; i++)
{
LCD_write_byte(pgm_read_byte( &map[i+n*Pix_x]), LCD_DATA);
}
Y++; //go to next page
}
}
/*-----------------------------------------------------------------------
Name : LCD_write_byte
Description : Sends data to display controller.
Argument(s) : data -> Data to be sent
cd -> Command or data (see/use enum)
-----------------------------------------------------------------------*/
void NokiaLcd::LCD_write_byte(unsigned char data, unsigned char command)
{
LCD_CE_PORT &= ~(1<<LCD_CE_BIT_NUM); // Enable SPI
if (command == LCD_CMD) // Send command
LCD_DC_PORT &= ~(1<<LCD_DC_BIT_NUM);
else
LCD_DC_PORT |= (1<<LCD_DC_BIT_NUM); // Send data
SPDR = data; // Load data to SPDR
while ((SPSR & 0x80) == 0); // Wait until data sent
LCD_CE_PORT |= (1<<LCD_CE_BIT_NUM); // ¹Ø±ÕLCD
}
void NokiaLcd::delay_nus(unsigned int n) //delay n us
{
unsigned int i=0;
for (i=0;i<n;i++)
_delay_us(1);
}
void NokiaLcd::delay_nms(unsigned int n) //Delay n ms
{
unsigned int i=0;
for (i=0;i<n;i++)
_delay_ms(1);
}
如果大家感兴趣，可以附上全文。
-----此内容被testcode于2005-06-25,12:42:04编辑过
-----此内容被testcode于2005-06-25,22:50:39编辑过 |
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发表于 2005-6-25 12:40:07
楼主
