2020年10月28日 | STM32学习笔记——TFT2.4彩屏显示图片

利用彩屏显示图片需要先完成彩屏的驱动程序，然后在驱动程序的基础上再编写应用程序。

彩屏的驱动程序如果写好的话，就可以一直使用了，精力主要集中在应用程序的编写就可以了，但是移植的话，要移植驱动程序。其实移植也只是改变那些很底层的靠近处理器的那部分代码。

因为STM32F103C8的片上只有64K的FLASH，所以不能存储太多的图片数据，也就不能显示太大的图片。

一下的程序注释的比较详细，看懂了基本上就可以用了。

彩屏驱动程序的头文件lcd.h如下：

#define uchar unsigned char 

#define uint unsigned int

#define Bus_16        //16位数据模式,如果使用8位模式，请注释此语句，如果使用16位模式，请打开此句

#define  LCD_DataPortH P1     //高8位数据口,8位模式下只使用高8位 

#define  LCD_DataPortL P0     //低8位数据口 ,8位模式下低8位可以不接线

#define LCD_WR    GPIO_Pin_2  //WR  引脚定义 P2^5

#define LCD_RS    GPIO_Pin_1  //RS  引脚定义 P2^6

#define LCD_CS    GPIO_Pin_0  //CS  引脚定义 P2^7

#define LCD_RST   GPIO_Pin_11     //RST 引脚定义 P3^3

#define LCD_RD    GPIO_Pin_8  //RD  引脚定义 P3^2

#define  LCD_SIZE_X 240

#define  LCD_SIZE_Y 320

extern  uint colors[];

extern  void  pic_play(uint xStart, uint xEnd, uint yStart, uint yEnd); //显示图片函数

void delayms(int count) ;

//void LCD_Writ_Bus(char VH,char VL);

void LCD_Init(void);

void LCD_Writ_Bus( uint VH, uint VL);

void LCD_Write_COM(char VH,char VL);

void LCD_Write_DATA(char VH,char VL);

void Pant(char VH,char VL);

void Address_set(unsigned int x1,unsigned int y1,unsigned int x2,unsigned int y2);

驱动程序lcd.c文件如下：

#include "stm32f10x_lib.h"

#include "Lcd.h"

//存储图片数据的头文件

//#include "picture.h"

#include "picture_sara.h"

#include "xiaoqian.h"

#include "yang.h"

#define    LCD_rest(x) x ? GPIO_SetBits(GPIOA, LCD_RST):   GPIO_ResetBits(GPIOA, LCD_RST) //自己定义位操作函数

#define    LCD_rd(x)   x ? GPIO_SetBits(GPIOA, LCD_RD) :   GPIO_ResetBits(GPIOA, LCD_RD)

#define    LCD_rs(x)   x ? GPIO_SetBits(GPIOB, LCD_RS) :   GPIO_ResetBits(GPIOB, LCD_RS)

#define    LCD_wr(x)   x ? GPIO_SetBits(GPIOB, LCD_WR) :   GPIO_ResetBits(GPIOB, LCD_WR)

#define    LCD_cs(x)   x ? GPIO_SetBits(GPIOB, LCD_CS) :   GPIO_ResetBits(GPIOB, LCD_CS)

uint colors[]=

{

  0xf800,0x07e0,0x001f,0xffe0,0x0000,0x07ff,0xf81f,0xffff  //颜色数据

};

void LCD_Init(void) //初始化LCD

{

    LCD_rest(1);

    delayms(5);

LCD_rest(0);

delayms(5);

LCD_rest(1);

delayms(5);

LCD_cs(0);  //打开片选使能

//

LCD_Write_COM(0x00,0xE5); LCD_Write_DATA(0x78,0xF0); // set SRAM internal timing

LCD_Write_COM(0x00,0x01); LCD_Write_DATA(0x01,0x00); // set SS and SM bit

LCD_Write_COM(0x00,0x02); LCD_Write_DATA(0x07,0x00); // set 1 line inversion

LCD_Write_COM(0x00,0x03); LCD_Write_DATA(0x10,0x30); // set GRAM write direction and BGR=1.

LCD_Write_COM(0x00,0x04); LCD_Write_DATA(0x00,0x00); // Resize register

LCD_Write_COM(0x00,0x08); LCD_Write_DATA(0x02,0x07); // set the back porch and front porch

LCD_Write_COM(0x00,0x09); LCD_Write_DATA(0x00,0x00); // set non-display area refresh cycle ISC[3:0]

LCD_Write_COM(0x00,0x0A); LCD_Write_DATA(0x00,0x00); // FMARK function

LCD_Write_COM(0x00,0x0C); LCD_Write_DATA(0x00,0x00); // RGB interface setting

LCD_Write_COM(0x00,0x0D); LCD_Write_DATA(0x00,0x00); // Frame marker Position

LCD_Write_COM(0x00,0x0F); LCD_Write_DATA(0x00,0x00); // RGB interface polarity

//

LCD_Write_COM(0x00,0x10); LCD_Write_DATA(0x00,0x00); // SAP, BT[3:0], AP, DSTB, SLP, STB

LCD_Write_COM(0x00,0x11); LCD_Write_DATA(0x00,0x07); // DC1[2:0], DC0[2:0], VC[2:0]

LCD_Write_COM(0x00,0x12); LCD_Write_DATA(0x00,0x00); // VREG1OUT voltage

LCD_Write_COM(0x00,0x13); LCD_Write_DATA(0x00,0x00); // VDV[4:0] for VCOM amplitude

LCD_Write_COM(0x00,0x07); LCD_Write_DATA(0x00,0x01);

delayms(50); // Dis-charge capacitor power voltage

LCD_Write_COM(0x00,0x10); LCD_Write_DATA(0x10,0x90); // 1490//SAP, BT[3:0], AP, DSTB, SLP, STB

LCD_Write_COM(0x00,0x11); LCD_Write_DATA(0x02,0x27); // DC1[2:0], DC0[2:0], VC[2:0]

delayms(50); // Delay 50ms

LCD_Write_COM(0x00,0x12); LCD_Write_DATA(0x00,0x1F); //001C// Internal reference voltage= Vci;

delayms(50); // Delay 50ms

LCD_Write_COM(0x00,0x13); LCD_Write_DATA(0x15,0x00); //0x1000//1400   Set VDV[4:0] for VCOM amplitude  1A00

LCD_Write_COM(0x00,0x29); LCD_Write_DATA(0x00,0x27); //0x0012 //001a  Set VCM[5:0] for VCOMH  //0x0025  0034

LCD_Write_COM(0x00,0x2B); LCD_Write_DATA(0x00,0x0D); // Set Frame Rate   000C

delayms(50); // Delay 50ms

LCD_Write_COM(0x00,0x20); LCD_Write_DATA(0x00,0x00); // GRAM horizontal Address

LCD_Write_COM(0x00,0x21); LCD_Write_DATA(0x00,0x00); // GRAM Vertical Address

// ----------- Adjust the Gamma Curve ----------//

LCD_Write_COM(0x00,0x30); LCD_Write_DATA(0x00,0x00);

LCD_Write_COM(0x00,0x31); LCD_Write_DATA(0x07,0x07);

LCD_Write_COM(0x00,0x32); LCD_Write_DATA(0x03,0x07);

LCD_Write_COM(0x00,0x35); LCD_Write_DATA(0x02,0x00);

LCD_Write_COM(0x00,0x36); LCD_Write_DATA(0x00,0x08);//0207

LCD_Write_COM(0x00,0x37); LCD_Write_DATA(0x00,0x04);//0306

LCD_Write_COM(0x00,0x38); LCD_Write_DATA(0x00,0x00);//0102

LCD_Write_COM(0x00,0x39); LCD_Write_DATA(0x07,0x07);//0707

LCD_Write_COM(0x00,0x3C); LCD_Write_DATA(0x00,0x02);//0702

LCD_Write_COM(0x00,0x3D); LCD_Write_DATA(0x1D,0x04);//1604

//------------------ Set GRAM area ---------------//

LCD_Write_COM(0x00,0x50); LCD_Write_DATA(0x00,0x00); // Horizontal GRAM Start Address

LCD_Write_COM(0x00,0x51); LCD_Write_DATA(0x00,0xEF); // Horizontal GRAM End Address

LCD_Write_COM(0x00,0x52); LCD_Write_DATA(0x00,0x00); // Vertical GRAM Start Address

LCD_Write_COM(0x00,0x53); LCD_Write_DATA(0x01,0x3F); // Vertical GRAM Start Address

LCD_Write_COM(0x00,0x60); LCD_Write_DATA(0xA7,0x00); // Gate Scan Line

LCD_Write_COM(0x00,0x61); LCD_Write_DATA(0x00,0x01); // NDL,VLE, REV

LCD_Write_COM(0x00,0x6A); LCD_Write_DATA(0x00,0x00); // set scrolling line

//-------------- Partial Display Control ---------//

LCD_Write_COM(0x00,0x80); LCD_Write_DATA(0x00,0x00);

LCD_Write_COM(0x00,0x81); LCD_Write_DATA(0x00,0x00);

LCD_Write_COM(0x00,0x82); LCD_Write_DATA(0x00,0x00);

LCD_Write_COM(0x00,0x83); LCD_Write_DATA(0x00,0x00);

LCD_Write_COM(0x00,0x84); LCD_Write_DATA(0x00,0x00);

LCD_Write_COM(0x00,0x85); LCD_Write_DATA(0x00,0x00);

//-------------- Panel Control -------------------//

LCD_Write_COM(0x00,0x90); LCD_Write_DATA(0x00,0x10);

LCD_Write_COM(0x00,0x92); LCD_Write_DATA(0x06,0x00);

LCD_Write_COM(0x00,0x07); LCD_Write_DATA(0x01,0x33); // 262K color and display ON

LCD_cs(1);  //关闭片选使能

} 

void delayms(int count)  // 

{

        int i,j;

        for(i=0;i

                for(j=0;j<100;j++);

}

#ifdef  Bus_16    //条件编译-16位数据模式   

void LCD_Writ_Bus(uint VH , uint VL)   //并行数据写入函数

{

  //LCD_DataPortH=VH;   //高位P1口

//屏蔽高8位  将数据送到PA0-PA7

GPIOA->BSRR = VH & 0x00ff;   

    GPIOA->BRR  = (~VH) & 0x00ff;

   //GPIO_SetBits(GPIOA,  VH & 0x00ff);

   //GPIO_ResetBits(GPIOA, (~ VH & 0x00ff));

    //LCD_DataPortL=VL;   //低位P0口

//屏蔽低8位  将数据送到PB8-PB15

GPIOB->BSRR = (VL)<<8 & 0xff00;   

    GPIOB->BRR  = ((~VL)<<8) & 0xff00;

LCD_wr(0);

LCD_wr(1);

}

#else //条件编译-8位数据模式 

void LCD_Writ_Bus(char VH,char VL)   //并行数据写入函数

{

     //LCD_DataPortH=VH;  //八位模式都用P0口送数据

     //LCD_wr(0);

//LCD_wr(1);

//LCD_DataPortH=VL; //八位模式都用P0口送数据

//LCD_wr(0);

//LCD_wr(1);

}

#endif

void LCD_Write_COM(char VH,char VL)  //发送命令

{

    LCD_rs(0);

LCD_Writ_Bus(VH,VL);

}

void LCD_Write_DATA(char VH,char VL) //发送数据

{

    LCD_rs(1);

LCD_Writ_Bus(VH,VL);

}

void Pant(char VH,char VL)    //涂满全屏函数

{

int i,j;

LCD_cs(0);  //打开片选使能

Address_set(0,0,239,319);

    for(i=0;i<320;i++)

 {

  for (j=0;j<240;j++)

    {

          LCD_Write_DATA(VH,VL);

    }

  }

     LCD_cs(1);  //关闭片选使能

}

void Address_set(unsigned int x1,unsigned int y1,unsigned int x2,unsigned int y2) //设置地址范围函数

{

LCD_Write_COM(0x00,0x20);LCD_Write_DATA(x1>>8,x1);   //设置X坐标位置

    LCD_Write_COM(0x00,0x21);LCD_Write_DATA(y1>>8,y1);   //设置Y坐标位置

    LCD_Write_COM(0x00,0x50);LCD_Write_DATA(x1>>8,x1);   //开始X

LCD_Write_COM(0x00,0x52);LCD_Write_DATA(y1>>8,y1);   //开始Y

    LCD_Write_COM(0x00,0x51);LCD_Write_DATA(x2>>8,x2);   //结束X

LCD_Write_COM(0x00,0x53);LCD_Write_DATA(y2>>8,y2);   //结束Y

    LCD_Write_COM(0x00,0x22);  

}

void  pic_play(uint Start_X, uint End_X,uint Start_Y,uint End_Y)

{

   uint m;

   //LCD_CS = 0;

   GPIO_ResetBits(GPIOB,LCD_CS);  //打开片选

   Address_set(Start_X,Start_Y,End_X,End_Y) ; //指定图片显示的范围

  // LCD_RS  = 1; 

   GPIO_SetBits(GPIOB, LCD_RS);   //关闭片选

   //循环把图片的所有数据依次写入

   Address_set(0,0,141,79);    //用彩屏显示图片时，一定要注意图片长宽比例，如果长宽比例不对的话，显示的图片就会变形

   //例如本幅图片取模软件输出的长宽为(177,100)，所以在这里图片的显示范围必须设为(0,0,176,99)，即x范围为0~176，y的范围为

   //0~99.这样图片才能正常显示，否则图片就会变形。

   for(m=0;m<22728/2;m++)   //这里的35400这个数字指定显示图片的范围，因为该图的数据总共只有35400个，所以这里指定

   //整幅图都显示出来。如果这个数比35400小，则只显示该图的一部分。

   {

       LCD_Write_DATA(gImage_sara[m*2+1],gImage_sara[m*2]);

   }

Address_set(0,90,65,189);  //一定要注意保持比例

for(m=0;m<13200/2;m++)

{

    LCD_Write_DATA(gImage_xiaoqian[m*2+1],gImage_xiaoqian[m*2]);

}

    Address_set(75,90,137,189); //一定要注意保持比例

for(m=0;m<12600/2;m++)

{

    LCD_Write_DATA(gImage_yang[m*2+1],gImage_yang[m*2]);

}

   //LCD_CS = 1;

   GPIO_SetBits(GPIOB, LCD_CS);  //关闭片选

}

主程序main.c

在主程序中完成对系统的初始化配置，利用彩屏的驱动程序完成图片的显示等功能，程序如下：

#include "stm32f10x_lib.h"

#include "lcd.h"

GPIO_InitTypeDef GPIO_InitStructure;   //定义GPIO初始化的结构体变量