基于ATMEGA8515的SPI驅(qū)動(dòng)ST7565P液晶屏的程序

這是用SPI方式來驅(qū)動(dòng)12864液晶的源程序，液晶屏的控制芯片為ST7565P經(jīng)測試SPI的時(shí)鐘可達(dá)到振蕩頻率的二分頻。比用普通IO口模擬串行的方式快多了。。。

下面貼出源代碼，有詳細(xì)注釋。。。。

本程序簡單實(shí)用，可拿去作簡單參考。。。。

編譯環(huán)境：GCC+AVR STUDIO

單片機(jī)：ATMEGA 8515

晶振： 3.6864M

#include<avr/io.h> //包含頭文件

#include

#define COMMAND 1

#define DATA 0

/////////////////////////////////////////

//數(shù)據(jù)線定義：

// SI==========PB5 //

// A0==========PC0

// CS==========PC2

// RES=========PC1

// SCL=========PB7

//

/////////////////////////////////////////

unsigned char gushi[8][112]PROGMEM=

{

{0x10,0x10,0x92,0x92,0x92,0xF2,0x9E,0x92,0x92,0x92,0x92,0x92,0xFE,0x10,0x10,0x00, //君問歸期未有期

0x00,0x00,0xF8,0x01,0x06,0xE0,0x22,0x22,0x22,0x22,0xE2,0x02,0x02,0xFE,0x00,0x00,

0x00,0xF8,0x00,0x00,0xFF,0x00,0x04,0x84,0x84,0x84,0x84,0x84,0x84,0xFC,0x00,0x00,

0x00,0x04,0xFF,0x54,0x54,0x54,0xFF,0x04,0x00,0xFE,0x22,0x22,0x22,0xFE,0x00,0x00,

0x40,0x40,0x48,0x48,0x48,0x48,0xC8,0xFF,0x48,0x48,0x48,0x48,0x48,0x40,0x40,0x00,

0x00,0x04,0x84,0x44,0xE4,0x34,0x2C,0x27,0x24,0x24,0x24,0xE4,0x04,0x04,0x04,0x00,

0x00,0x04,0xFF,0x54,0x54,0x54,0xFF,0x04,0x00,0xFE,0x22,0x22,0x22,0xFE,0x00,0x00},

{0x40,0x20,0x10,0x0C,0xFE,0x45,0x44,0x44,0x44,0x44,0x44,0x44,0xFD,0x00,0x00,0x00,

0x00,0x00,0xFF,0x00,0x00,0x03,0x02,0x02,0x02,0x02,0x03,0x40,0x80,0x7F,0x00,0x00,

0x00,0x87,0x40,0x30,0x0F,0x00,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x3F,0x00,0x00,

0x42,0x22,0x1B,0x02,0x02,0x0A,0x33,0x62,0x18,0x07,0x02,0x22,0x42,0x3F,0x00,0x00,

0x20,0x20,0x10,0x10,0x08,0x06,0x01,0xFF,0x01,0x02,0x04,0x08,0x18,0x30,0x10,0x00,

0x02,0x01,0x00,0x00,0xFF,0x09,0x09,0x09,0x29,0x49,0xC9,0x7F,0x00,0x00,0x00,0x00,

0x42,0x22,0x1B,0x02,0x02,0x0A,0x33,0x62,0x18,0x07,0x02,0x22,0x42,0x3F,0x00,0x00},

{0x00,0x00,0xFE,0x42,0x42,0x42,0x42,0x7E,0x42,0x42,0x42,0x42,0xFE,0x00,0x00,0x00, //巴山夜雨漲池

0x00,0x00,0xE0,0x00,0x00,0x00,0x00,0xFF,0x00,0x00,0x00,0x00,0x00,0xE0,0x00,0x00,

0x04,0x04,0x84,0xC4,0x3C,0x14,0x85,0x66,0xBC,0x24,0x24,0x24,0xE4,0x24,0x04,0x00,

0x02,0x02,0xF2,0x32,0x52,0x92,0x12,0xFE,0x32,0x52,0x92,0x12,0xF2,0x02,0x02,0x00,

0x10,0x61,0x86,0x60,0xF2,0x12,0x12,0x1E,0x80,0xFF,0xA0,0x90,0x88,0x86,0x80,0x00,

0x24,0x24,0xE4,0xFC,0xA2,0x22,0x22,0x80,0x70,0x00,0xFF,0x40,0x20,0x18,0x00,0x00,

0x10,0x60,0x02,0x8C,0x60,0x80,0xF8,0x40,0x40,0xFE,0x20,0x20,0x10,0xF0,0x00,0x00},

{0x00,0x00,0x3F,0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x78,0x20,0x00,

0x00,0x20,0x7F,0x20,0x20,0x20,0x20,0x3F,0x20,0x20,0x20,0x20,0x20,0x7F,0x00,0x00,

0x02,0x01,0x00,0xFF,0x00,0x82,0x41,0x22,0x14,0x09,0x14,0x23,0x40,0xC0,0x40,0x00,

0x00,0x00,0xFF,0x01,0x02,0x04,0x00,0x7F,0x01,0x02,0x44,0x80,0x7F,0x00,0x00,0x00,

0x04,0xFC,0x03,0x00,0x01,0x41,0x81,0x7F,0x00,0xFF,0x42,0x0C,0x30,0x60,0x20,0x00,

0x02,0x01,0x00,0xFF,0x00,0x83,0x40,0x20,0x18,0x07,0x01,0x06,0x18,0xE0,0x40,0x00,

0x08,0x08,0x7C,0x03,0x00,0x00,0x3F,0x40,0x40,0x5F,0x40,0x42,0x44,0x43,0x70,0x00},

{0x80,0x40,0xF0,0x1C,0x07,0xE2,0x24,0x24,0x24,0xE4,0x04,0x04,0xFC,0x04,0x04,0x00, //何當(dāng)共剪西窗燭

0x00,0x00,0x40,0x42,0x5C,0x48,0x40,0x40,0x7F,0x40,0x50,0x4E,0x44,0xC0,0x00,0x00,

0x00,0x10,0x10,0x10,0x10,0xFE,0x10,0x10,0x10,0x10,0xFE,0x10,0x10,0x10,0x00,0x00,

0x00,0x04,0xF4,0x54,0x55,0x56,0x54,0xF4,0x04,0x04,0xE6,0x05,0x04,0xF4,0x04,0x00,

0x02,0xF2,0x12,0x12,0x12,0xFE,0x12,0x12,0x12,0xFE,0x12,0x12,0x12,0xF2,0x02,0x00,

0x00,0x4C,0x44,0xE4,0x54,0x44,0x64,0xD5,0x46,0x44,0x4C,0x54,0xD4,0x24,0x2C,0x00,

0x80,0x60,0x00,0xFF,0x20,0x18,0xF0,0x10,0x10,0xFF,0x12,0x10,0xF0,0x10,0x00,0x00},

{0x00,0x00,0x7F,0x00,0x00,0x07,0x02,0x02,0x02,0x07,0x20,0x40,0x3F,0x00,0x00,0x00,

0x00,0x00,0x20,0x22,0x22,0x22,0x22,0x22,0x22,0x22,0x22,0x22,0x22,0x7F,0x00,0x00,

0x02,0x02,0x82,0x42,0x32,0x1F,0x0A,0x02,0x02,0x06,0x0B,0x32,0xE2,0x42,0x02,0x00,

0x00,0x08,0x8F,0x89,0x49,0x2B,0x1D,0x0B,0x08,0x08,0x08,0x4A,0x8C,0x7B,0x00,0x00,

0x00,0x7F,0x28,0x24,0x22,0x21,0x20,0x20,0x20,0x21,0x22,0x22,0x22,0x7F,0x00,0x00,

0x00,0x00,0x00,0xFF,0x44,0x62,0x55,0x49,0x55,0x43,0x41,0x40,0xFF,0x00,0x00,0x00,

0x40,0x20,0x18,0x07,0x04,0x28,0x63,0x21,0x21,0x3F,0x11,0x15,0x1B,0x30,0x00,0x00},

{0x80,0x88,0x88,0x88,0xFF,0x88,0x88,0x88,0x00,0xFE,0x02,0x02,0x02,0xFE,0x00,0x00, //卻話巴山夜雨時(shí)

0x40,0x41,0x4E,0xC4,0x00,0x20,0x24,0x24,0x24,0x24,0xFC,0x22,0x22,0x22,0x20,0x00,

0x00,0x00,0xFE,0x42,0x42,0x42,0x42,0x7E,0x42,0x42,0x42,0x42,0xFE,0x00,0x00,0x00,

0x00,0x00,0xE0,0x00,0x00,0x00,0x00,0xFF,0x00,0x00,0x00,0x00,0x00,0xE0,0x00,0x00,

0x04,0x04,0x84,0xC4,0x3C,0x14,0x85,0x66,0xBC,0x24,0x24,0x24,0xE4,0x24,0x04,0x00,

0x02,0x02,0xF2,0x32,0x52,0x92,0x12,0xFE,0x32,0x52,0x92,0x12,0xF2,0x02,0x02,0x00,

0x00,0xFC,0x44,0x44,0x44,0xFC,0x10,0x90,0x10,0x10,0x10,0xFF,0x10,0x10,0x10,0x00},

{0x00,0x10,0x3C,0x13,0x10,0x08,0x0A,0x1C,0x08,0xFF,0x00,0x08,0x10,0x0F,0x00,0x00,

0x00,0x00,0x00,0x7F,0x20,0x10,0x00,0x7E,0x22,0x22,0x23,0x22,0x22,0x7E,0x00,0x00,

0x00,0x00,0x3F,0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x78,0x20,0x00,

0x00,0x20,0x7F,0x20,0x20,0x20,0x20,0x3F,0x20,0x20,0x20,0x20,0x20,0x7F,0x00,0x00,

0x02,0x01,0x00,0xFF,0x00,0x82,0x41,0x22,0x14,0x09,0x14,0x23,0x40,0xC0,0x40,0x00,

0x00,0x00,0xFF,0x01,0x02,0x04,0x00,0x7F,0x01,0x02,0x44,0x80,0x7F,0x00,0x00,0x00,

0x00,0x07,0x04,0x04,0x04,0x07,0x00,0x00,0x03,0x40,0x80,0x7F,0x00,0x00,0x00,0x00},

};

////////////////////////////////

//發(fā)送一個(gè)字節(jié)到ST7565P并等待發(fā)送完畢

//入口：要發(fā)送的字節(jié)

//返回值：無

////////////////////////////////

void SPIByte(unsigned char byte)

{

SPDR = byte; //寫數(shù)據(jù)

while(!(SPSR & (1<//等待發(fā)送完成

}

////////////////////////////////////////////////

//將一個(gè)字節(jié)發(fā)送的ST7565P的函數(shù)

//入口參數(shù)： select ,data

//select:根據(jù)此值確定發(fā)送給ST7565P的是數(shù)據(jù)還是命令

//data: 要發(fā)送給ST7565的一個(gè)字節(jié)

//返回值：無

////////////////////////////////////////////////

void LCD_SPISend(unsigned char select,unsigned char data)

{

PORTC &= ~(1<<2); // CS=0 芯片使能信號(hào)

if(select == COMMAND) //傳輸?shù)氖敲?wbr />

{

PORTC &= ~(1<<0); // 根據(jù)ST7565P的數(shù)據(jù)手冊(cè)，傳輸命令時(shí)A0應(yīng)該是為低電平

SPIByte(data);

PORTC |= 1<<0; // A0=1

}

else

{

SPIByte(data);

}

PORTC |= 1<<2; //CS= 恢復(fù)不使能

}

////////////////////////////////////////////

//寫坐標(biāo)函數(shù)

//入口參數(shù)：x y

//y: 頁面地址，此液晶將顯示區(qū)域分為9個(gè)頁面，y的值域0~8

//x: 列地址，值域：0~127

//返回值：無

////////////////////////////////////////////

void LCD_XYSet(unsigned char x,unsigned char y)

{

LCD_SPISend(COMMAND,0xB0|y); //y的值為0~8

LCD_SPISend(COMMAND,0x10|(x>>4));

LCD_SPISend(COMMAND,0x00|(x&0x0F));

}

/////////////////////////////////////

//延時(shí)函數(shù)

//入口： ms 當(dāng)延時(shí)100毫秒時(shí)，ms的值為100即可

//返回值：無

/////////////////////////////////////

void DelayMs(volatile unsigned int ms)

{

volatile unsigned int i;

volatile unsigned int j;

for(i=0;i

{

j=280;

while(j--);

}

}

//////////////////////////////////////////////////////

//初始化SPI及液晶屏的函數(shù)

//入口：無

//返回值：無

/////////////////////////////////////////////////////

void LCD_Init(void)

{

SPCR = 0x5C;

SPSR |= 1<

//SPI的功能設(shè)置解釋：使能SPI；采用主機(jī)模式；SPI的傳輸模式為模式3；時(shí)鐘頻率為系統(tǒng)時(shí)鐘的兩分頻，即 //3.6864/2M

DelayMs(100);

SPIByte(0xFF); //可發(fā)可不發(fā)，無意義

PORTC &= ~(1<<1); //將復(fù)位腳拉低

DelayMs(5); //延時(shí)5ms，等待電源穩(wěn)定

PORTC |= 1<<1; //將復(fù)位腳拉高

DelayMs(5);

LCD_SPISend(COMMAND,0xAE); //將液晶屏的顯示關(guān)掉

LCD_SPISend(COMMAND,0xA3); //設(shè)置偏壓比

LCD_SPISend(COMMAND,0xA0); //設(shè)置SEG 輸出方向

LCD_SPISend(COMMAND,0xC8); //設(shè)置公共端輸出掃描方向

LCD_SPISend(COMMAND,0x25); //調(diào)整 (1 + Rb/Ra) ratio 值，調(diào)整此值影響很大

LCD_SPISend(COMMAND,0x81); //開始設(shè)置α的命令

LCD_SPISend(COMMAND,0x28); //設(shè)置α的值，值越大對(duì)比度越強(qiáng)，調(diào)整此值影響不太，是微調(diào)的

DelayMs(5);

LCD_SPISend(COMMAND,0x2F); //開啟相關(guān)電壓

DelayMs(50);

LCD_SPISend(COMMAND,0xAF); //顯示開

LCD_SPISend(COMMAND,0xF8);

LCD_SPISend(COMMAND,0x01); //此兩條命令是設(shè)置升壓比的

DelayMs(500); //不知此延時(shí)可否省去，不過了安全起見，初次調(diào)試保留為好。。

}

////////////////////////////////////////

//清屏函數(shù)

//入口：無

//返回值：無

///////////////////////////////////////

void Clear_Display(void)

{

unsigned char i;

unsigned char j;

for(i=0;i<8;i++)

{

LCD_XYSet(0,i);

for(j=0;j<128;j++)

{

LCD_SPISend(DATA,0); //傳輸數(shù)據(jù)

}

}

}

////////////////////////////////

//顯示一首李商隱的詩歌：

//　　君問歸期未有期

//　　巴山夜雨漲秋池

//　　何當(dāng)共剪西窗燭

//　　卻話巴山夜雨時(shí)

//入口：無

//返回值：無

////////////////////////////////

void Gushi_Display(void)

{

unsigned char i;

unsigned char j;

for(i=0;i<8;i++)

{

LCD_XYSet(8,i);

for(j=0;j<112;j++)

{

LCD_SPISend(DATA,__LPM(&gushi[i][j]));

}

}

}

int main(void)

{

DDRB = 0xFF; //將IO口配置為輸出

PORTB = 0xFF; //讓IO口都輸出高電平

DDRC = 0xFF; //配置為輸出

PORTC = 0xFF; //輸出高電平

DelayMs(1);

LCD_Init(); //初始化的函數(shù)

Clear_Display(); //清屏函數(shù)

Gushi_Display();

while(1)

{

}

}

編譯結(jié)果如下：

AVR Memory Usage

----------------

Device: atmega8515

Program: 1688 bytes (20.6% Full)

(.text + .data + .bootloader)

Data: 0 bytes (0.0% Full)

(.data + .bss + .noinit)

Build succeeded with 0 Warnings...

顯示效果如下：