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基于ATMEGA8515的SPI驅(qū)動ST7565P液晶屏的程序

作者： 時間：2016-11-22 來源：網(wǎng)絡 收藏
這是用SPI方式來驅(qū)動12864液晶的源程序，液晶屏的控制芯片為ST7565P經(jīng)測試SPI的時鐘可達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，有詳細注釋。。。。
本程序簡單實用，可拿去作簡單參考。。。。
編譯環(huán)境：GCC+AVR STUDIO
單片機：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
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
if(select == COMMAND) //傳輸?shù)氖敲?wbr />
{
PORTC &= ~(1<<0); // 根據(jù)ST7565P的數(shù)據(jù)手冊，傳輸命令時A0應該是為低電平
SPIByte(data);
PORTC |= 1<<0; // A0=1
}
else
{
SPIByte(data);
}
PORTC |= 1<<2; //CS= 恢復不使能
}
////////////////////////////////////////////
//寫坐標函數(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));
}
/////////////////////////////////////
//延時函數(shù)
//入口： ms 當延時100毫秒時，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的功能設置解釋：使能SPI；采用主機模式；SPI的傳輸模式為模式3；時鐘頻率為系統(tǒng)時鐘的兩分頻，即 //3.6864/2M
DelayMs(100);
SPIByte(0xFF); //可發(fā)可不發(fā)，無意義
PORTC &= ~(1<<1); //將復位腳拉低
DelayMs(5); //延時5ms，等待電源穩(wěn)定
PORTC |= 1<<1; //將復位腳拉高
DelayMs(5);
LCD_SPISend(COMMAND,0xAE); //將液晶屏的顯示關掉
LCD_SPISend(COMMAND,0xA3); //設置偏壓比
LCD_SPISend(COMMAND,0xA0); //設置SEG 輸出方向
LCD_SPISend(COMMAND,0xC8); //設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); //開始設置α的命令
LCD_SPISend(COMMAND,0x28); //設置α的值，值越大對比度越強，調(diào)整此值影響不太，是微調(diào)的
DelayMs(5);
LCD_SPISend(COMMAND,0x2F); //開啟相關電壓
DelayMs(50);
LCD_SPISend(COMMAND,0xAF); //顯示開
LCD_SPISend(COMMAND,0xF8);
LCD_SPISend(COMMAND,0x01); //此兩條命令是設置升壓比的
DelayMs(500); //不知此延時可否省去，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
//　　何當共剪西窗燭
//　　卻話巴山夜雨時
//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：

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