1.硬件平臺

• CPU：STM32F103ZE
• 屏幕：3.5寸TFTLCD屏
• 觸控：電阻式觸摸屏xpt2046
• SD卡

2.實現功能

1.SD卡設備檢測，文件系統移植，用戶存儲小說和字庫文件；

2.字庫信息加載檢測，自動完成字庫信息加載與更新。本次采用GBK字庫，字體大小有16*16、24*24、32*32三個字庫；

3.觸摸屏校準，上電檢測觸摸屏校準信息；手動進入觸摸屏校準模式

4.小說文件索引，小說文本切換；

5.小說翻頁，字體大小選擇，顏色選擇，返回主目錄；

3.示例效果

?SD卡檢測和觸摸屏校準

?字庫檢測與更新

目錄和小說顯示界面

顏色切換

字體選擇

4.軟件設計

?1.SD卡字庫更新加載

/***********************SD卡字庫更新***********************/
u8 SDcard_DownFont(const TCHAR* path,u32 addr,u16 font_size)
{
  FIL fp;
  u8 res;
  UINT br;
  u32 size;
  u32 cnt=0;
	u16 y=0;
	float load=0,load2=0;
  u8 buff[1024];
	char buff2[20];
  /*1.讀取文件大小*/
  FILINFO file_info;
  f_stat(path,&file_info);
  size=file_info.fsize;
  if(size==0)return 1;
  //printf("文件大小:%u byte\r\n",size);
  /*2.打開文件*/
  res=f_open(&fp,path,FA_READ);
  if(res)
  {
   // printf("文件打開失敗res=%d\r\n",res);
    return 2;
  }
	W25Q64_WriteData(addr-10,(u8 *)"        ",9);//清除標志位
	if(font_size==16)y=100;
	else if(font_size==24)y=140;
	else if(font_size==32)y=180;
	LCD_Display_Str2(20,y,16,(u8 *)"更新進度:",BLACK,WHITE);
	LCD_Refresh();
  while(1)
  {
    f_read(&fp,buff,1024,&br);
    W25Q64_WriteData(addr+cnt,buff,br);
    cnt+=br;
		load=(cnt*1.0/size)*100;
		if(load!=load2)
		{
			load2=load;
			LCD_Display_Str2(30+strlen("更新進度")/2*16,y,16,(u8 *)"        ",WHITE,WHITE);
			snprintf(buff2,sizeof(buff2),"%.1f %%",load2);
			LCD_Display_Str2(30+strlen("更新進度")/2*16,y,16,(u8 *)buff2,RED,WHITE);
			LCD_Refresh();
		}
    //printf("更新進度:%d\r\n",cnt);
    if(br!=1024)break;
  }
	/*寫入標志位*/
	if(font_size==16)
	{
		strcpy((char *)buff,"GBK16_OK");
	}
	else if(font_size==24)
	{
		strcpy((char *)buff,"GBK24_OK");
	}
	else if(font_size==32)
	{
		strcpy((char *)buff,"GBK32_OK");
	}
	W25Q64_WriteData(addr-10,buff,9);//GBK16_OK
  f_close(&fp);//關閉文件
	return 0;
}

2.獲取小說文件信息

/*SD卡操作函數*/
typedef struct FILE_info
{
	char file_name[100];
	u32 file_size;
	u16 y;/*在屏幕位置*/
	struct FILE_info *next;
	struct FILE_info *pre;
}FILE_INFO;
FILE_INFO *story_head=NULL;
/*創建鏈表*/
FILE_INFO *List_CreateHead(FILE_INFO *head)
{
	if(head!=NULL)return head;
	head=malloc(sizeof(FILE_INFO));
	head->next=NULL;
	head->pre=NULL;
	return head;
}
/*添加節點*/
FILE_INFO *List_AddNode(FILE_INFO *head)
{
	if(head==NULL)return NULL;//鏈表頭不存在
	FILE_INFO *phead=head;
	while(phead->next!=NULL)
	{
		phead=phead->next;
	}
	FILE_INFO *new_node=malloc(sizeof(FILE_INFO));
	new_node->pre=phead;
	phead->next=new_node;
	new_node->next=NULL;
	return new_node;
}
/*遍歷節點*/
void List_PrintNode(FILE_INFO *head)
{
	u16 x=20,y=50;
	LCD_Display_Str2(LCD_WIDTH/2-24,10,16,(u8 *)"書 架",BLACK,WHITE);
	if(head==NULL)return ;//鏈表頭不存在
	FILE_INFO *phead=head;
	while(phead->next!=NULL)
	{
		phead=phead->next;
		phead->y=y;
		LCD_Display_Str2(x,phead->y,16,(u8 *)phead->file_name,DARKBLUE,WHITE);//顯示字符串
		y+=35;
		//printf("%s,%d\r\n",phead->file_name,phead->file_size);
	}
	LCD_Refresh();
}
u16 List_CheckNode(FILE_INFO *head,u16 y,u8 *file_name)
{
	if(head==NULL)return 0;//鏈表頭不存在
	FILE_INFO *phead=head;
	while(phead->next!=NULL)
	{
		phead=phead->next;
		if(y<=phead->y+26 && y>=phead->y-5)
		{
			strcpy((char *)file_name,phead->file_name);
			return phead->y;
		}
	}
	return 0;//未找到 
}
/*************************************目錄遍歷(讀取小說文件信息)************************/
u8 FATFS_printDir(const TCHAR* path)
{
  DIR dp;
  u8 res;
	u8 stat=0;
	story_head=List_CreateHead(story_head);//創建鏈表頭
  res=f_opendir(&dp,path);
  FILINFO file_info;
  if(res)
  {
    printf("打開目錄失敗res=%d\r\n",res);
		free(story_head);//釋放鏈表頭
    return 1;
  }
	FILE_INFO *temp=NULL;
  while(1)
  {
    res=f_readdir(&dp,&file_info);
    if(res!=FR_OK || file_info.fname[0]==0)break;
		if(strstr(file_info.fname,".txt"))
		{
			temp=List_AddNode(story_head);
			if(temp==NULL)
			{
				stat=2;//動態分配空間失敗
				goto AA;
			}
			//printf("文件名:%s,",file_info.fname);
			strcpy(temp->file_name,file_info.fname);//文件名
			if(file_info.fattrib == AM_ARC)//普通文件
			{
				temp->file_size=file_info.fsize;//文件大小
				//printf("文件大小:%u byte\r\n",file_info.fsize);
			}
		}
  }
AA:
	f_closedir(&dp);//關閉目錄
	List_PrintNode(story_head);
	return stat;
}

3.讀取小說內容，翻頁，字體選擇、顏色切換

/*打開小說*/
u8 buff_read[4098];
const u16 font_corlour[]={BLACK,BLUE,RED,LIGHTGREEN};
void FATFS_ReadFile(const char *file_name)
{
	FIL fp;//文件指針
	u8 res=0;
	UINT br;
	u32 font_buff[20];//保存每頁字節數據
	u16 font_cnt=0;
	u16 font_len=0;
	u16 font_size=16;//字體大小
	u16 x=0,y=20;
	u8 corlour=0;
	char name[100];
	snprintf(name,sizeof(name),"0:/Text/%s",file_name);
	res=f_open(&fp,name,FA_READ);//打開文件
	if(res)
	{
		printf("文件打開失敗res=%d\r\n",res);
		return ;
	}
	u8 *p;
	u16 x1,y1;
	u8 stat=0;
	while(1)
	{	
		if(stat)
		{
			buff_read[0]=stat;
			stat=0;
			res=f_read(&fp,&buff_read[1],4095,&br);
			br++;
			buff_read[br]='\0';
		}
		else
		{
			res=f_read(&fp,buff_read,4096,&br);
			buff_read[br]='\0';
		}
		p=buff_read;
		while(*p)
		{
			font_len=LCD_Display_Str(x,y,font_size,p,font_corlour[corlour]);//顯示字符串
			LCD_Refresh();
			while(1)
			{
				res=XPT2046_ReadXY();//觸摸屏檢測
				if(res)
				{
					x1=xpt2046_info.x;
					y1=xpt2046_info.y;	
					while(T_PEN==0){}//等待松開
					//printf("x1=%d,y1=%d\r\n",x1,y1);
					if((x1>=212 && x1<=320) && (y1>=416 && y1<=480))//返回
					{
						LcdFill(0,0,320,480,WHITE);
						List_PrintNode(story_head);
						return ;
					}
					else if((x1>=106 && x1<=210) && (y1>=416 && y1<=480))//字體顏色
					{
						corlour++;
						if(corlour>=4)corlour=0;
						LcdFill(0,0,320,410,WHITE);
						break;
					}
					else if((x1>=1 && x1<=105) && (y1>=416 && y1<=480))//字體大小調節
					{
						if(font_size==16)font_size=24;
						else if(font_size==24)font_size=32;
						else if(font_size==32)font_size=16;
						LcdFill(0,0,320,410,WHITE);
						break;
					}
					else if(x1>160 && y1<=380)
					{
						p+=font_len&0x7fff;
						if(*p!='\0')
						{
							font_buff[font_cnt++]=font_len&0x7fff;
							LcdFill(0,0,320,410,WHITE);
							break;
						}
						else 
						{
							if(font_len&0x8000)
							{
								stat=*(p-1);
							}
							LcdFill(0,0,320,410,WHITE);
							break;
						}
					}
					else if(x1<160 && y1<=380)
					{
						if(p!=buff_read && font_cnt>0)
						{
							font_cnt--;
							p-=font_buff[font_cnt];
							LcdFill(0,0,320,410,WHITE);
							break;
						}
					}
				}
			}
		}

		font_cnt=0;
		memset(buff_read,0,sizeof(buff_read));
		if(br!=4096)break;
	}
}

4.主函數main.c，硬件初始化，觸摸屏校準，字體檢測與更新，主界面顯示

#include "stm32f10x.h"
#include "beep.h"
#include "led.h"
#include "key.h"
#include "delay.h"
#include "usart.h"
#include "w25q64.h"
#include "at24c08.h"
#include "timer.h"
#include 
#include "xpt2046.h"
#include "nt35310.h"
#include "sram.h"
#include 
#include "ff.h"http://文件系統頭文件
#include "sdcard.h"
u8 SDcard_DownFont(const TCHAR* path,u32 addr,u16 font_size);//字庫更新
u8 FATFS_printDir(const TCHAR* path);//遍歷目錄
u16 List_CheckNode(FILE_INFO *head,u16 y,u8 *file_name);//查找文件
void FATFS_ReadFile(const char *file_name);//讀文件
FATFS fs;
int main()
{
	u16 y=0;
	char buff[30];
  u8 res=0;
  Beep_Init();
  Led_Init();
  Key_Init();
  Usartx_Init(USART1,115200,72);
  printf("串口初始化完成\r\n");
  W25Q64_Init();
  IIC_Init();
  LCD_Init();
  Sram_Init();
  XPT2046_Init();//初始化
	Touch_Calibration();
AA:
	LCD_Clear(WHITE);//清屏函數
	LCD_Refresh();
	LCD_Display_Str2(20,20,16,(u8 *)"SD卡狀態",RED,WHITE);
  res=f_mount(&fs,"0:",1);//磁盤掛載
  if(res)
	{
		printf("SD卡掛載失敗ERR=%d\r\n",res);
		snprintf(buff,sizeof(buff),"err%d",res);
		LCD_Display_Str2(20+strlen("SD卡狀態")*12+20,20,16,(u8 *)buff,RED,WHITE);
		LCD_Display_Str2(20,50,16,(u8 *)"請檢查SD卡是否插入!",RED,WHITE);
		LCD_Refresh();
		Delay_Ms(500);
		goto AA;
	}
	else LCD_Display_Str2(20+strlen("SD卡狀態")*12+20,20,16,(u8 *)"OK",RED,WHITE);
	/*字庫檢測*/
	LCD_Display_Str2(LCD_WIDTH/2-strlen("字庫檢測")/2*16,40,16,(u8 *)"字庫檢測",RED,WHITE);
	LCD_Refresh();

GBK_16:
	W25Q64_ReadData(GBK_16_ADDR-10,(u8*)buff,9);//GBK16_OK
	if(strstr(buff,"GBK16_OK"))
	{
		LCD_Display_Str2(20,60,16,(u8 *)"GBK16    OK",RED,WHITE);
		LCD_Refresh();
	}
	else 
	{
		LCD_Display_Str2(20,60,16,(u8 *)"GBK16    NO",RED,WHITE);
		LCD_Display_Str2(LCD_WIDTH/2-strlen("更新GBK16字庫")/2*16,80,16,(u8 *)"更新GBK16字庫",RED,WHITE);
		LCD_Refresh();
		if(SDcard_DownFont("0:/font/GBK_16.DZK",GBK_16_ADDR,16))//字庫更新
		{
			LCD_Display_Str2(LCD_WIDTH/2-strlen("                 ")/2*16,80,16,(u8 *)"                 ",WHITE,WHITE);
			LCD_Display_Str2(10,80,16,(u8 *)"請將GBK_16.DZK放到/font/目錄下,重啟!",BLACK,WHITE);
			LCD_Refresh();
		}
		else 
		{
			LCD_Display_Str2(LCD_WIDTH/2-strlen("                 ")/2*16,80,16,(u8 *)"                 ",WHITE,WHITE);
			LCD_Display_Str2(20,100,16,(u8 *)"                   ",WHITE,WHITE);
			LCD_Refresh();
			goto GBK_16;
		}
	}
	/*GBK24_OK*/
GBK_24:
	W25Q64_ReadData(GBK_24_ADDR-10,(u8*)buff,9);
	if(strstr(buff,"GBK24_OK"))
	{
		LCD_Display_Str2(20,100,16,(u8 *)"GBK24    OK",RED,WHITE);
		LCD_Refresh();
	}
	else 
	{
		LCD_Display_Str2(20,100,16,(u8 *)"GBK24    NO",RED,WHITE);
		LCD_Display_Str2(LCD_WIDTH/2-strlen("更新GBK24字庫")/2*16,120,16,(u8 *)"更新GBK24字庫",RED,WHITE);
		LCD_Refresh();
		if(SDcard_DownFont("0:/font/GBK_24.DZK",GBK_24_ADDR,24))//字庫更新
		{
			LCD_Display_Str2(LCD_WIDTH/2-strlen("                 ")/2*16,120,16,(u8 *)"                 ",WHITE,WHITE);
			LCD_Display_Str2(10,120,16,(u8 *)"請將GBK_24.DZK放到/font/目錄下,重啟!",BLACK,WHITE);
			LCD_Refresh();
		}
		else 
		{
			LCD_Display_Str2(LCD_WIDTH/2-strlen("                 ")/2*16,120,16,(u8 *)"                 ",WHITE,WHITE);
			LCD_Display_Str2(20,140,16,(u8 *)"                   ",WHITE,WHITE);
			LCD_Refresh();
			goto GBK_24;
		}
	}
	/*GBK32_OK*/
GBK_32:
	W25Q64_ReadData(GBK_32_ADDR-10,(u8*)buff,9);
	if(strstr(buff,"GBK32_OK"))
	{
		LCD_Display_Str2(20,140,16,(u8 *)"GBK32    OK",RED,WHITE);
		LCD_Refresh();
	}
	else 
	{
		LCD_Display_Str2(20,140,16,(u8 *)"GBK32    NO",RED,WHITE);
		LCD_Refresh();
		LCD_Display_Str2(LCD_WIDTH/2-strlen("更新GBK32字庫")/2*16,160,16,(u8 *)"更新GBK32字庫",RED,WHITE);
		LCD_Refresh();
		if(SDcard_DownFont("0:/font/GBK_32.DZK",GBK_32_ADDR,32))//字庫更新
		{
			LCD_Display_Str2(LCD_WIDTH/2-strlen("                 ")/2*16,160,16,(u8 *)"                 ",WHITE,WHITE);
			LCD_Display_Str2(10,160,16,(u8 *)"請將GBK_32.DZK放到/font/目錄下,重啟!",BLACK,WHITE);
			LCD_Refresh();
		}
		else 
		{
			LCD_Display_Str2(LCD_WIDTH/2-strlen("                 ")/2*16,160,16,(u8 *)"                 ",WHITE,WHITE);
			LCD_Display_Str2(20,180,16,(u8 *)"                   ",WHITE,WHITE);
			LCD_Refresh();
			goto GBK_32;
		}
	}
	Delay_Ms(1000);
	Delay_Ms(1000);
	Delay_Ms(1000);
	LCD_Clear(WHITE);//清屏函數
	LCD_Refresh();
	FATFS_printDir("0:/Text/");
  while(1)
  {  
		res=XPT2046_ReadXY();
		if(res)
		{
			//printf("x,y=%d,%d\r\n",xpt2046_info.x,xpt2046_info.y);
			y=List_CheckNode(story_head,xpt2046_info.y,(u8 *)buff);
			if(y)
			{
				LcdFill(0,y-8,320,y+24,LIGHTGREEN);
				LCD_Display_Str2(20,y,16,(u8 *)buff,DARKBLUE,LIGHTGREEN);//顯示字符串
				LCD_Refresh();
				while(T_PEN==0){}//等待松開
				LcdFill(0,0,320,480,WHITE);
				OLED_DrawRectangle(1, 415, 319,479,BLACK);//繪制矩形
				OLED_DrawRectangle(2, 416, 318,478,BLACK);//繪制矩形
				LCD_DrawLine(105, 415, 105, 479,BLACK);
				LCD_DrawLine(106, 415, 106, 479,BLACK);
				LCD_DrawLine(211, 415, 211, 479,BLACK);
				LCD_DrawLine(212, 415, 212, 479,BLACK);
				LCD_Display_Str2(5,415+20,24,(u8 *)"字體大小",BLACK,WHITE);//顯示字符串
				LCD_Display_Str2(106+5,415+20,24,(u8 *)"字體顏色",BLACK,WHITE);//顯示字符串
				LCD_Display_Str2(212+29,415+20,24,(u8 *)"返回",BLACK,WHITE);//顯示字符串
				LCD_Refresh();
				FATFS_ReadFile(buff);
			}
		}
  }
}