基于ATMEGA8515的SPI驱动ST7565P液晶屏的程序(原创)

来源：互联网发布：linux系统ping 编辑：程序博客网时间：2024/05/29 09:25

这是用SPI方式来驱动12864液晶的源程序，液晶屏的控制芯片为ST7565P经测试SPI的时钟可达到振荡频率的二分频。比用普通IO口模拟串行的方式快多了。。。

下面贴出源代码，有详细注释。。。。

本程序简单实用，可拿去作简单参考。。。。

编译环境：GCC+AVR STUDIO

单片机：ATMEGA 8515

晶振： 3.6864M

#include<avr/io.h> //包含头文件

#include<avr/pgmspace.h>

#define COMMAND 1

#define DATA 0

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

//数据线定义：

// 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, //君问归期未有期

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, //巴山夜雨涨池

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, //何当共剪西窗烛

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, //却话巴山夜雨时

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},

};

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

//发送一个字节到ST7565P并等待发送完毕

//入口：要发送的字节

//返回值：无

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

void SPIByte(unsigned char byte)

{

SPDR =byte; //写数据

while(!(SPSR &(1<<SPIF))); //等待发送完成

}

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

//将一个字节发送的ST7565P的函数

//入口参数： select ,data

//select:根据此值确定发送给ST7565P的是数据还是命令

//data: 要发送给ST7565的一个字节

//返回值：无

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

void LCD_SPISend(unsigned char select,unsigned chardata)

{

PORTC&= ~(1<<2); // CS=0芯片使能信号

if(select == COMMAND) //传输的是命令

{

PORTC &=~(1<<0); //根据ST7565P的数据手册，传输命令时A0应该是为低电平

SPIByte(data);

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

}

else

{

SPIByte(data);

}

PORTC|= 1<<2; //CS=恢复不使能

}

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

//写坐标函数

//入口参数：x y

//y: 页面地址，此液晶将显示区域分为9个页面，y的值域0~8

//x: 列地址，值域：0~127

//返回值：无

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

void LCD_XYSet(unsigned char x,unsigned chary)

{

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

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

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

}

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

//延时函数

//入口： ms 当延时100毫秒时，ms的值为100即可

//返回值：无

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

void DelayMs(volatile unsigned int ms)

{

volatile unsigned inti;

volatile unsigned intj;

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

{

j=280;

while(j--);

}

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

//初始化SPI及液晶屏的函数

//入口：无

//返回值：无

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

void LCD_Init(void)

{

SPCR =0x5C;

SPSR|= 1<<SPI2X;

//SPI的功能设置解释：使能SPI；采用主机模式；SPI的传输模式为模式3；时钟频率为系统时钟的两分频，即 //3.6864/2M

DelayMs(100);

SPIByte(0xFF); //可发可不发，无意义

PORTC&= ~(1<<1); //将复位脚拉低

DelayMs(5); //延时5ms，等待电源稳定

PORTC|= 1<<1; //将复位脚拉高

DelayMs(5);

LCD_SPISend(COMMAND,0xAE); //将液晶屏的显示关掉

LCD_SPISend(COMMAND,0xA3); //设置偏压比

LCD_SPISend(COMMAND,0xA0); //设置SEG输出方向

LCD_SPISend(COMMAND,0xC8); //设置公共端输出扫描方向

LCD_SPISend(COMMAND,0x25); //调整 (1 +Rb/Ra) ratio 值，调整此值影响很大

LCD_SPISend(COMMAND,0x81); //开始设置α的命令

LCD_SPISend(COMMAND,0x28); //设置α的值，值越大对比度越强，调整此值影响不太，是微调的

DelayMs(5);

LCD_SPISend(COMMAND,0x2F); //开启相关电压

DelayMs(50);

LCD_SPISend(COMMAND,0xAF); //显示开

LCD_SPISend(COMMAND,0xF8);

LCD_SPISend(COMMAND,0x01); //此两条命令是设置升压比的

DelayMs(500); //不知此延时可否省去，不过了安全起见，初次调试保留为好。。

}

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

//清屏函数

//入口：无

//返回值：无

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

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); //传输数据

}

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

//显示一首李商隐的诗歌：

//　　君问归期未有期

//　　巴山夜雨涨秋池

//　　何当共剪西窗烛

//　　却话巴山夜雨时

//入口：无

//返回值：无

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

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; //将IO口配置为输出

PORTB= 0xFF; //让IO口都输出高电平

DDRC =0xFF; //配置为输出

PORTC= 0xFF; //输出高电平

DelayMs(1);

LCD_Init(); //初始化的函数

Clear_Display(); //清屏函数

Gushi_Display();

while(1)

{

}

编译结果如下：

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...

显示效果如下：

0 0