2020年03月30日 | 基于ATMEGA8515的SPI驱动ST7565P液晶屏的程序

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      //包含头文件 

#include 

#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<} 

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

//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    { 

        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<//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。。