第 29 章 电阻触摸屏—触摸画板
2024-06-11 13:22:36
29.1 触摸屏简介
1.1 电阻式触摸屏检测原理
1.2 电阻触摸屏控制芯片
1.3 电容式触摸屏检测原理
29.2 电阻触摸屏—触摸画板实验
2.1 硬件设计
2.2 软件设计
2.2.1 编程要点
(1) 编写软件模拟 SPI 协议的驱动；
(2) 编写触摸芯片的控制驱动，如发送命令字，获取触摸坐标等；
(3) 编写触摸校正程序；
(4) 编写测试程序检验驱动。
2.2.2 代码分析
1.触摸屏硬件相关宏定义
2.初始化触摸屏控制引脚
3.模拟 SPI 协议的读写时序
4.采集触摸原始数据
5.多次采样求平均值
6.根据原始数据计算坐标值
7.触摸校正
8.触摸检测状态机
9.触摸坐标获取及处理
2.2.3 main 函数
main.c
/********************************************************************************* @file main.c* @author fire* @version V1.0* @date 2013-xx-xx* @brief 触摸画板实验******************************************************************************* @attention** 实验平台:野火 F103-指南者 STM32 开发板 * 论坛 :http://www.firebbs.cn* 淘宝 :https://fire-stm32.taobao.com********************************************************************************/ #include "stm32f10x.h"
#include "./usart/bsp_usart.h"
#include "./lcd/bsp_ili9341_lcd.h"
#include "./lcd/bsp_xpt2046_lcd.h"
#include "./flash/bsp_spi_flash.h"
#include "./led/bsp_led.h"
#include "palette.h"
#include <string.h>int main(void)
{ //LCD 初始化ILI9341_Init(); //触摸屏初始化XPT2046_Init();//从FLASH里获取校正参数，若FLASH无参数，则使用模式3进行校正Calibrate_or_Get_TouchParaWithFlash(3,0);/* USART config */USART_Config(); LED_GPIO_Config();printf("\r\n ********** 触摸画板程序 *********** \r\n"); printf("\r\n 若汉字显示不正常，请阅读工程中的readme.txt文件说明，根据要求给FLASH重刷字模数据\r\n"); //其中0、3、5、6 模式适合从左至右显示文字，//不推荐使用其它模式显示文字 其它模式显示文字会有镜像效果 //其中 6 模式为大部分液晶例程的默认显示方向 ILI9341_GramScan ( 3 ); //绘制触摸画板界面Palette_Init(LCD_SCAN_MODE);while ( 1 ){//触摸检测函数，本函数至少10ms调用一次XPT2046_TouchEvenHandler();}}/* ------------------------------------------end of file---------------------------------------- */palette.h
#ifndef _PALETTE_H
#define _PALETTE_H#include "stm32f10x.h"
#include "./lcd/bsp_ili9341_lcd.h"#define COLOR_BLOCK_WIDTH 40
#define COLOR_BLOCK_HEIGHT 28#define BUTTON_NUM 16
#define PALETTE_START_Y 0
#define PALETTE_END_Y LCD_Y_LENGTH#if 1 //按钮栏在左边#define BUTTON_START_X 0#define PALETTE_START_X (COLOR_BLOCK_WIDTH*2+1)#define PALETTE_END_X LCD_X_LENGTH#else //按钮栏在右边，(存在触摸按键时也会的bug仅用于测试触摸屏左边界)#define BUTTON_START_X (LCD_X_LENGTH-2*COLOR_BLOCK_WIDTH)#define PALETTE_START_X 0#define PALETTE_END_X (LCD_X_LENGTH-2*COLOR_BLOCK_WIDTH)#endif/*LCD 颜色代码，CL_是Color的简写16Bit由高位至低位， RRRR RGGG GGGB BBBB下面的RGB 宏将24位的RGB值转换为16位格式。启动windows的画笔程序，点击编辑颜色，选择自定义颜色，可以获得的RGB值。推荐使用迷你取色器软件获得你看到的界面颜色。
*/
#if LCD_RGB_888
/*RGB888颜色转换*/
#define RGB(R,G,B) ( (R<< 16) | (G << 8) | (B)) /* 将8位R,G,B转化为 24位RGB888格式 */#else
/*RGB565 颜色转换*/
#define RGB(R,G,B) (((R >> 3) << 11) | ((G >> 2) << 5) | (B >> 3)) /* 将8位R,G,B转化为 16位RGB565格式 */
#define RGB565_R(x) ((x >> 8) & 0xF8)
#define RGB565_G(x) ((x >> 3) & 0xFC)
#define RGB565_B(x) ((x << 3) & 0xF8)#endifenum
{CL_WHITE = RGB(255,255,255), /* 白色 */CL_BLACK = RGB( 0, 0, 0), /* 黑色 */CL_RED = RGB(255, 0, 0), /* 红色 */CL_GREEN = RGB( 0,255, 0), /* 绿色 */CL_BLUE = RGB( 0, 0,255), /* 蓝色 */CL_YELLOW = RGB(255,255, 0), /* 黄色 */CL_GREY = RGB( 98, 98, 98), /* 深灰色 */CL_GREY1 = RGB( 150, 150, 150), /* 浅灰色 */CL_GREY2 = RGB( 180, 180, 180), /* 浅灰色 */CL_GREY3 = RGB( 200, 200, 200), /* 最浅灰色 */CL_GREY4 = RGB( 230, 230, 230), /* 最浅灰色 */CL_BUTTON_GREY = RGB( 195, 195, 195), /* WINDOWS 按钮表面灰色 */CL_MAGENTA = RGB(255, 0, 255), /* 红紫色，洋红色 */CL_CYAN = RGB( 0, 255, 255), /* 蓝绿色，青色 */CL_BLUE1 = RGB( 0, 0, 240), /* 深蓝色 */CL_BLUE2 = RGB( 0, 0, 128), /* 深蓝色 */CL_BLUE3 = RGB( 68, 68, 255), /* 浅蓝色1 */CL_BLUE4 = RGB( 0, 64, 128), /* 浅蓝色1 *//* UI 界面 Windows控件常用色 */CL_BTN_FACE = RGB(236, 233, 216), /* 按钮表面颜色(灰) */CL_BOX_BORDER1 = RGB(172, 168,153), /* 分组框主线颜色 */CL_BOX_BORDER2 = RGB(255, 255,255), /* 分组框阴影线颜色 */CL_MASK = 0x7FFF /* RGB565颜色掩码，用于文字背景透明 */
};typedef struct
{uint16_t start_x; //按键的x起始坐标 uint16_t start_y; //按键的y起始坐标uint16_t end_x; //按键的x结束坐标 uint16_t end_y; //按键的y结束坐标uint32_t para; //颜色按钮中表示选择的颜色，笔迹形状按钮中表示选择的画刷uint8_t touch_flag; //按键按下的标志void (*draw_btn)(void * btn); //按键描绘函数void (*btn_command)(void * btn); //按键功能执行函数，例如切换颜色、画刷}Touch_Button;/*画刷形状列表*/
typedef enum
{LINE_SINGLE_PIXCEL = 0, //单像素线LINE_2_PIXCEL, //2像素线LINE_4_PIXCEL, //4像素线LINE_6_PIXCEL, //6像素线LINE_8_PIXCEL, //8像素线LINE_16_PIXCEL, //16像素线LINE_20_PIXCEL, //20像素线LINE_WITH_CIRCLE, //珠子连线RUBBER, //橡皮}SHAPE;/*画刷参数*/
typedef struct
{uint32_t color;SHAPE shape;}Brush_Style;/*brush全局变量在其它文件有使用到*/
extern Brush_Style brush;void Palette_Init(uint8_t LCD_Mode);
void Touch_Button_Init(void);
void Touch_Button_Down(uint16_t x,uint16_t y);
void Touch_Button_Up(uint16_t x,uint16_t y);
void Draw_Trail(int16_t pre_x,int16_t pre_y,int16_t x,int16_t y,Brush_Style* brush);#endif //_PALETTE_H
palette.c
/********************************************************************************* @file palette.c* @author fire* @version V1.0* @date 2015-xx-xx* @brief 触摸画板应用函数******************************************************************************* @attention** 实验平台:野火 STM32 F429 开发板* 论坛 :http://www.firebbs.cn* 淘宝 :https://fire-stm32.taobao.com********************************************************************************/#include "palette.h"
#include "./lcd/bsp_xpt2046_lcd.h"
#include "./lcd/bsp_ili9341_lcd.h"/*按钮结构体数组*/
Touch_Button button[BUTTON_NUM];/*画笔参数*/
Brush_Style brush;static void Draw_Color_Button(void *btn);
static void Draw_Clear_Button(void *btn);
static void Draw_Shape_Button(void *btn);static void Command_Select_Color(void *btn);
static void Command_Select_Brush(void *btn);
static void Command_Clear_Palette(void *btn);static void LCD_DrawUniLineCircle(uint16_t x1, uint16_t y1, uint16_t x2, uint16_t y2,uint8_t thick );/**
* @brief Palette_Init 画板初始化
* @param 无
* @retval 无
*/
void Palette_Init(uint8_t LCD_Mode)
{uint8_t i;ILI9341_GramScan ( LCD_Mode );/* 整屏清为白色 */LCD_SetBackColor(CL_WHITE);ILI9341_Clear(0,0,LCD_X_LENGTH,LCD_Y_LENGTH); /* 初始化按钮 */Touch_Button_Init();/* 描绘按钮 */for(i=0;i<BUTTON_NUM;i++){button[i].draw_btn(&button[i]);}/* 初始化画笔 */brush.color = CL_BLACK;brush.shape = LINE_SINGLE_PIXCEL;LCD_SetTextColor(brush.color);}/**
* @brief Touch_Button_Init 初始化按钮参数
* @param 无
* @retval 无
*/
void Touch_Button_Init(void)
{/*第一列，主要为颜色按钮*/button[0].start_x = BUTTON_START_X;button[0].start_y = 0;button[0].end_x = BUTTON_START_X+COLOR_BLOCK_WIDTH ;button[0].end_y = COLOR_BLOCK_HEIGHT;button[0].para = CL_BLACK;button[0].touch_flag = 0; button[0].draw_btn = Draw_Color_Button ;button[0].btn_command = Command_Select_Color ;button[1].start_x = BUTTON_START_X;button[1].start_y = COLOR_BLOCK_HEIGHT;button[1].end_x = BUTTON_START_X+COLOR_BLOCK_WIDTH ;button[1].end_y = COLOR_BLOCK_HEIGHT*2;button[1].para = CL_GREY;button[1].touch_flag = 0; button[1].draw_btn = Draw_Color_Button ;button[1].btn_command = Command_Select_Color ;button[2].start_x = BUTTON_START_X;button[2].start_y = COLOR_BLOCK_HEIGHT*2;button[2].end_x = BUTTON_START_X+COLOR_BLOCK_WIDTH ;button[2].end_y = COLOR_BLOCK_HEIGHT*3;button[2].para = CL_BLUE;button[2].touch_flag = 0; button[2].draw_btn = Draw_Color_Button ;button[2].btn_command = Command_Select_Color ;button[3].start_x = BUTTON_START_X;button[3].start_y = COLOR_BLOCK_HEIGHT*3;button[3].end_x = BUTTON_START_X+COLOR_BLOCK_WIDTH ;button[3].end_y = COLOR_BLOCK_HEIGHT*4;button[3].para = CL_CYAN;button[3].touch_flag = 0; button[3].draw_btn = Draw_Color_Button ;button[3].btn_command = Command_Select_Color ;button[4].start_x = BUTTON_START_X;button[4].start_y = COLOR_BLOCK_HEIGHT*4;button[4].end_x = BUTTON_START_X+COLOR_BLOCK_WIDTH ;button[4].end_y = COLOR_BLOCK_HEIGHT*5;button[4].para = CL_RED;button[4].touch_flag = 0; button[4].draw_btn = Draw_Color_Button ;button[4].btn_command = Command_Select_Color ;button[5].start_x = BUTTON_START_X;button[5].start_y = COLOR_BLOCK_HEIGHT*5;button[5].end_x = BUTTON_START_X+COLOR_BLOCK_WIDTH ;button[5].end_y = COLOR_BLOCK_HEIGHT*6;button[5].para = CL_MAGENTA;button[5].touch_flag = 0; button[5].draw_btn = Draw_Color_Button ;button[5].btn_command = Command_Select_Color ;button[6].start_x = BUTTON_START_X;button[6].start_y = COLOR_BLOCK_HEIGHT*6;button[6].end_x = BUTTON_START_X+COLOR_BLOCK_WIDTH ;button[6].end_y = COLOR_BLOCK_HEIGHT*7;button[6].para = CL_GREEN;button[6].touch_flag = 0; button[6].draw_btn = Draw_Color_Button ;button[6].btn_command = Command_Select_Color ; button[7].start_x = BUTTON_START_X;button[7].start_y = COLOR_BLOCK_HEIGHT*7;button[7].end_x = BUTTON_START_X+COLOR_BLOCK_WIDTH ;button[7].end_y = LCD_Y_LENGTH;button[7].para = CL_BUTTON_GREY;button[7].touch_flag = 0; button[7].draw_btn = Draw_Clear_Button ;button[7].btn_command = Command_Clear_Palette ;/*第二列，主要为画刷按钮*/button[8].start_x = BUTTON_START_X + COLOR_BLOCK_WIDTH;button[8].start_y = 0;button[8].end_x = BUTTON_START_X + COLOR_BLOCK_WIDTH*2 ;button[8].end_y = COLOR_BLOCK_HEIGHT;button[8].para = LINE_SINGLE_PIXCEL;button[8].touch_flag = 0; button[8].draw_btn = Draw_Shape_Button ;button[8].btn_command = Command_Select_Brush ;button[9].start_x = BUTTON_START_X + COLOR_BLOCK_WIDTH;button[9].start_y = COLOR_BLOCK_HEIGHT;button[9].end_x = BUTTON_START_X + COLOR_BLOCK_WIDTH*2 ;button[9].end_y = COLOR_BLOCK_HEIGHT*2;button[9].para = LINE_2_PIXCEL;button[9].touch_flag = 0; button[9].draw_btn = Draw_Shape_Button ;button[9].btn_command = Command_Select_Brush ;button[10].start_x =BUTTON_START_X + COLOR_BLOCK_WIDTH;button[10].start_y = COLOR_BLOCK_HEIGHT*2;button[10].end_x = BUTTON_START_X + COLOR_BLOCK_WIDTH*2 ;button[10].end_y = COLOR_BLOCK_HEIGHT*3;button[10].para = LINE_4_PIXCEL;button[10].touch_flag = 0; button[10].draw_btn = Draw_Shape_Button ;button[10].btn_command = Command_Select_Brush ;button[11].start_x = BUTTON_START_X + COLOR_BLOCK_WIDTH;button[11].start_y = COLOR_BLOCK_HEIGHT*3;button[11].end_x = BUTTON_START_X + COLOR_BLOCK_WIDTH*2 ;button[11].end_y = COLOR_BLOCK_HEIGHT*4;button[11].para = LINE_6_PIXCEL;button[11].touch_flag = 0; button[11].draw_btn = Draw_Shape_Button ;button[11].btn_command = Command_Select_Brush ;button[12].start_x = BUTTON_START_X + COLOR_BLOCK_WIDTH;button[12].start_y = COLOR_BLOCK_HEIGHT*4;button[12].end_x = BUTTON_START_X + COLOR_BLOCK_WIDTH*2 ;button[12].end_y = COLOR_BLOCK_HEIGHT*5;button[12].para = LINE_8_PIXCEL;button[12].touch_flag = 0; button[12].draw_btn = Draw_Shape_Button ;button[12].btn_command = Command_Select_Brush ;button[13].start_x = BUTTON_START_X + COLOR_BLOCK_WIDTH;button[13].start_y = COLOR_BLOCK_HEIGHT*5;button[13].end_x = BUTTON_START_X + COLOR_BLOCK_WIDTH*2 ;button[13].end_y = COLOR_BLOCK_HEIGHT*6;button[13].para = LINE_16_PIXCEL;button[13].touch_flag = 0; button[13].draw_btn = Draw_Shape_Button ;button[13].btn_command = Command_Select_Brush ;button[14].start_x = BUTTON_START_X + COLOR_BLOCK_WIDTH;button[14].start_y = COLOR_BLOCK_HEIGHT*6;button[14].end_x = BUTTON_START_X + COLOR_BLOCK_WIDTH*2 ;button[14].end_y = COLOR_BLOCK_HEIGHT*7;button[14].para = LINE_20_PIXCEL;button[14].touch_flag = 0; button[14].draw_btn = Draw_Shape_Button ;button[14].btn_command = Command_Select_Brush ; button[15].start_x = BUTTON_START_X + COLOR_BLOCK_WIDTH;button[15].start_y = COLOR_BLOCK_HEIGHT*7;button[15].end_x = BUTTON_START_X + COLOR_BLOCK_WIDTH*2 ;button[15].end_y = LCD_Y_LENGTH;button[15].para = RUBBER;button[15].touch_flag = 0; button[15].draw_btn = Draw_Shape_Button ;button[15].btn_command = Command_Select_Brush ;
}/**
* @brief Touch_Button_Down 按键被按下时调用的函数，由触摸屏调用
* @param x 触摸位置的x坐标
* @param y 触摸位置的y坐标
* @retval 无
*/
void Touch_Button_Down(uint16_t x,uint16_t y)
{uint8_t i;for(i=0;i<BUTTON_NUM;i++){/* 触摸到了按钮 */if(x<=button[i].end_x && y<=button[i].end_y && y>=button[i].start_y && x>=button[i].start_x ){if(button[i].touch_flag == 0) /*原本的状态为没有按下，则更新状态*/{button[i].touch_flag = 1; /* 记录按下标志 */button[i].draw_btn(&button[i]); /*重绘按钮*/} }else if(button[i].touch_flag == 1) /* 触摸移出了按键的范围且之前有按下按钮 */{button[i].touch_flag = 0; /* 清除按下标志，判断为误操作*/button[i].draw_btn(&button[i]); /*重绘按钮*/}}}/**
* @brief Touch_Button_Up 按键被释放时调用的函数，由触摸屏调用
* @param x 触摸最后释放时的x坐标
* @param y 触摸最后释放时的y坐标
* @retval 无
*/
void Touch_Button_Up(uint16_t x,uint16_t y)
{uint8_t i; for(i=0;i<BUTTON_NUM;i++){/* 触笔在按钮区域释放 */if((x<button[i].end_x && x>button[i].start_x && y<button[i].end_y && y>button[i].start_y)){ button[i].touch_flag = 0; /*释放触摸标志*/button[i].draw_btn(&button[i]); /*重绘按钮*/ button[i].btn_command(&button[i]); /*执行按键的功能命令*/break;}} }/**
* @brief Draw_Trail 在画板区域描绘触摸轨迹
* @param pre_x 上一点的x坐标
* @param pre_y 上一点的y坐标
* @param x 最新一点的x坐标
* @param y 最新一点的y坐标
* @param brush 画刷参数
* @retval 无
*/
void Draw_Trail(int16_t pre_x,int16_t pre_y,int16_t x,int16_t y,Brush_Style* brush)
{/*设置画板区域为活动窗口,bsp_lcd.c驱动还没有这样的函数，用于限制绘画窗口*/
// RA8875_SetActiveWindow(PALETTE_START_X,PALETTE_START_Y,PALETTE_END_X,PALETTE_END_Y);/*触摸位置在画板区域*/if(x>PALETTE_START_X && pre_x>PALETTE_START_X ){switch(brush->shape) /*根据画刷参数描绘不同的轨迹*/{/* 描绘1像素宽度的轨迹线 */case LINE_SINGLE_PIXCEL: if(pre_x< 0 || pre_y < 0) //新的笔迹{ ILI9341_SetPointPixel(x,y); }else //继续上一次的笔迹{ ILI9341_DrawLine(pre_x,pre_y,x,y);} break;case LINE_2_PIXCEL:if(x-1<PALETTE_START_X||pre_x-1<PALETTE_START_X) //画板左边界break;/* 描绘2像素宽度的轨迹线 */LCD_DrawUniLineCircle(pre_x,pre_y,x,y,1);break;case LINE_4_PIXCEL:if(x-2<PALETTE_START_X||pre_x-2<PALETTE_START_X) //画板左边界break;LCD_DrawUniLineCircle(pre_x,pre_y,x,y,2);break;case LINE_6_PIXCEL:if(x-3<PALETTE_START_X||pre_x-3<PALETTE_START_X) //画板左边界break;LCD_DrawUniLineCircle(pre_x,pre_y,x,y,3);break;case LINE_8_PIXCEL:if(x-4<PALETTE_START_X||pre_x-4<PALETTE_START_X) //画板左边界break;LCD_DrawUniLineCircle(pre_x,pre_y,x,y,4);break;case LINE_16_PIXCEL:if(x-8<PALETTE_START_X||pre_x-8<PALETTE_START_X) //画板左边界break;LCD_DrawUniLineCircle(pre_x,pre_y,x,y,8);break;case LINE_20_PIXCEL:if(x-10<PALETTE_START_X ||pre_x-10<PALETTE_START_X) //画板左边界break;LCD_DrawUniLineCircle(pre_x,pre_y,x,y,10);break;/*描绘带珠子的单像素线*/case LINE_WITH_CIRCLE: if(x-3<PALETTE_START_X||pre_x-3<PALETTE_START_X) //画板左边界break; if(pre_x< 0 || pre_y< 0)//新的笔迹{ ILI9341_SetPointPixel(x,y); }else //继续上一次的笔迹{ ILI9341_DrawLine(pre_x,pre_y,x,y);ILI9341_DrawCircle(x,y,3,1);} break;/*橡皮功能*/ case RUBBER:if(x-20<PALETTE_START_X || //画板左边界x+20>LCD_X_LENGTH || x-20<0 || //液晶左右边界y+20>LCD_Y_LENGTH || y-20<0) //液晶上下边界 break; // if(x>PALETTE_START_X+20){LCD_SetColors(CL_WHITE,CL_WHITE);ILI9341_DrawRectangle( x-40/2,y-40/2,40,40,1); }break;}}/*退出局限画板的绘图窗口，bsp_lcd.c驱动还没有这样的函数，用于限制绘画窗口*/
// RA8875_SetActiveWindow(0,0,LCD_X_LENGTH,LCD_Y_LENGTH);}/**
* @brief Draw_Color_Button 颜色按钮的描绘函数
* @param btn Touch_Button 类型的按键参数
* @retval 无
*/
static void Draw_Color_Button(void *btn)
{Touch_Button *ptr = (Touch_Button *)btn;/*释放按键*/if(ptr->touch_flag == 0){/*背景为功能键相应的颜色*/LCD_SetColors(ptr->para,CL_WHITE);ILI9341_DrawRectangle( ptr->start_x,ptr->start_y,ptr->end_x - ptr->start_x,ptr->end_y - ptr->start_y,1);}else /*按键按下*/{/*白色背景*/LCD_SetColors(CL_WHITE,CL_WHITE);ILI9341_DrawRectangle( ptr->start_x,ptr->start_y,ptr->end_x - ptr->start_x,ptr->end_y - ptr->start_y,1);} /*按钮边框*/LCD_SetColors(CL_BLUE4,CL_WHITE);ILI9341_DrawRectangle( ptr->start_x,ptr->start_y,ptr->end_x - ptr->start_x,ptr->end_y - ptr->start_y,0);}/**
* @brief Draw_Clear_Button 清屏按钮的描绘函数
* @param btn Touch_Button 类型的按键参数
* @retval 无
*/
static void Draw_Clear_Button(void *btn)
{Touch_Button *ptr = (Touch_Button *)btn;/*释放按键*/if(ptr->touch_flag == 0){LCD_SetColors(CL_BUTTON_GREY,CL_WHITE);ILI9341_DrawRectangle( ptr->start_x,ptr->start_y,ptr->end_x - ptr->start_x,ptr->end_y - ptr->start_y,1);LCD_SetColors(CL_RED,CL_BUTTON_GREY);/*选择字体，使用中英文显示时，尽量把英文选择成8*16的字体，*中文字体大小是16*16的，需要其它字体请自行制作字模*//*这个函数只对英文字体起作用*/LCD_SetFont(&Font8x16);ILI9341_DispString_EN_CH( ptr->start_x + (ptr->end_x - ptr->start_x - 16*2 )/2,
// ptr->start_y+15,ptr->start_y+ ((ptr->end_y - ptr->start_y-16)/2), "清屏");}else /*按键按下*/{LCD_SetColors(CL_WHITE,CL_WHITE);ILI9341_DrawRectangle(ptr->start_x,ptr->start_y,ptr->end_x - ptr->start_x,ptr->end_y - ptr->start_y,1);LCD_SetColors(CL_RED,CL_WHITE);/*选择字体，使用中英文显示时，尽量把英文选择成8*16的字体，*中文字体大小是16*16的，需要其它字体请自行制作字模*//*这个函数只对英文字体起作用*/LCD_SetFont(&Font8x16);ILI9341_DispString_EN_CH( ptr->start_x + (ptr->end_x - ptr->start_x - 16*2 )/2,
// ptr->start_y+15, ptr->start_y+ ((ptr->end_y - ptr->start_y-16)/2), "清屏");} /*按钮边框*/LCD_SetColors(CL_BLUE4,CL_WHITE);ILI9341_DrawRectangle(ptr->start_x,ptr->start_y,ptr->end_x - ptr->start_x,ptr->end_y - ptr->start_y,0);}/**
* @brief Draw_Shape_Button 笔刷按钮的描绘函数
* @param btn Touch_Button 类型的按键参数
* @retval 无
*/
static void Draw_Shape_Button(void *btn)
{Touch_Button *ptr = (Touch_Button *)btn;uint16_t i;/* 背景颜色 没按下时为灰色，按下时为白色*/ if(ptr->touch_flag ==0 ){LCD_SetColors(CL_BUTTON_GREY,CL_WHITE);ILI9341_DrawRectangle( ptr->start_x,ptr->start_y,ptr->end_x - ptr->start_x,ptr->end_y - ptr->start_y,1);/*显示文字时的背景颜色*/ LCD_SetColors(CL_BLUE4,CL_BUTTON_GREY);ILI9341_DrawRectangle( ptr->start_x,ptr->start_y,ptr->end_x - ptr->start_x,ptr->end_y - ptr->start_y,0);}else{LCD_SetColors(CL_WHITE,CL_WHITE);ILI9341_DrawRectangle( ptr->start_x,ptr->start_y,ptr->end_x - ptr->start_x,ptr->end_y - ptr->start_y,1);/*显示文字时的背景颜色*/ LCD_SetColors(CL_BLUE4,CL_WHITE);ILI9341_DrawRectangle( ptr->start_x,ptr->start_y,ptr->end_x - ptr->start_x,ptr->end_y - ptr->start_y,0);}LCD_SetColors(CL_BLACK,CL_WHITE); /*根据画刷形状描绘按钮图案*/switch(ptr->para){case LINE_SINGLE_PIXCEL: LCD_SetColors(CL_BLACK,CL_WHITE);ILI9341_DrawLine(ptr->start_x+20,ptr->start_y+(ptr->end_y-ptr->start_y)/2,ptr->end_x-20,ptr->start_y+(ptr->end_y-ptr->start_y)/2);break; case LINE_2_PIXCEL:LCD_DrawUniLineCircle(ptr->start_x+20,ptr->start_y+(ptr->end_y-ptr->start_y)/2,ptr->end_x-20,ptr->start_y+(ptr->end_y-ptr->start_y)/2,1);break;case LINE_4_PIXCEL:LCD_DrawUniLineCircle(ptr->start_x+20,ptr->start_y+(ptr->end_y-ptr->start_y)/2,ptr->end_x-20,ptr->start_y+(ptr->end_y-ptr->start_y)/2,2);break;case LINE_6_PIXCEL:LCD_DrawUniLineCircle(ptr->start_x+20,ptr->start_y+(ptr->end_y-ptr->start_y)/2,ptr->end_x-20,ptr->start_y+(ptr->end_y-ptr->start_y)/2,3);break;case LINE_8_PIXCEL:LCD_DrawUniLineCircle(ptr->start_x+20,ptr->start_y+(ptr->end_y-ptr->start_y)/2,ptr->end_x-20,ptr->start_y+(ptr->end_y-ptr->start_y)/2,4);break;case LINE_16_PIXCEL:LCD_DrawUniLineCircle(ptr->start_x+20,ptr->start_y+(ptr->end_y-ptr->start_y)/2,ptr->end_x-20,ptr->start_y+(ptr->end_y-ptr->start_y)/2,8 );break;case LINE_20_PIXCEL:LCD_DrawUniLineCircle(ptr->start_x+20,ptr->start_y+(ptr->end_y-ptr->start_y)/2,ptr->end_x-20,ptr->start_y+(ptr->end_y-ptr->start_y)/2,10);break;case LINE_WITH_CIRCLE: LCD_SetColors(CL_BLACK,CL_WHITE); ILI9341_DrawLine(ptr->start_x+5,ptr->start_y+(ptr->end_y-ptr->start_y)/2,ptr->end_x-5,ptr->start_y+(ptr->end_y-ptr->start_y)/2);for(i=0;i<((ptr->end_x - ptr->start_x-10)/10);i++){ILI9341_DrawCircle( ptr->start_x+5+i*10,ptr->start_y+(ptr->end_y-ptr->start_y)/2,3,1);}break;case RUBBER:LCD_SetColors(CL_WHITE,CL_BLACK);ILI9341_DrawRectangle( ptr->start_x+((ptr->end_x - ptr->start_x -24)/2),ptr->start_y+ ((ptr->end_y - ptr->start_y-24 -16)/2),24,24,1 ); LCD_SetColors(CL_RED,CL_BUTTON_GREY); /*选择字体，使用中英文显示时，尽量把英文选择成8*16的字体，*中文字体大小是24*24的，需要其它字体请自行制作字模*//*这个函数只对英文字体起作用*/LCD_SetFont(&Font8x16);ILI9341_DispString_EN_CH( ptr->start_x+(ptr->end_x - ptr->start_x -16*2)/2,ptr->start_y+ ((ptr->end_y - ptr->start_y-24 -16)/2)+24, "橡皮");break;}}/**
* @brief Command_Select_Color 切换画刷颜色，颜色按键的功能执行函数
* @param btn Touch_Button 类型的按键参数
* @retval 无
*/
static void Command_Select_Color(void *btn)
{Touch_Button *ptr = (Touch_Button *)btn;brush.color = ptr->para; LCD_SetColors(brush.color,CL_WHITE);if(brush.shape == RUBBER){brush.shape = LINE_SINGLE_PIXCEL;}}/**
* @brief Command_Select_Brush 切换画刷颜色，画刷按键的功能执行函数
* @param btn Touch_Button 类型的按键参数
* @retval 无
*/
static void Command_Select_Brush(void *btn)
{Touch_Button *ptr = (Touch_Button *)btn;brush.shape =(SHAPE) ptr->para;LCD_SetColors(brush.color,CL_WHITE);
}/**
* @brief Command_Select_Brush 切换画刷颜色，清屏按键的功能执行函数
* @param btn Touch_Button 类型的按键参数
* @retval 无
*/
static void Command_Clear_Palette(void *btn)
{LCD_SetColors(CL_WHITE,CL_WHITE);ILI9341_DrawRectangle( PALETTE_START_X,PALETTE_START_Y, PALETTE_END_X-(PALETTE_START_X+1), PALETTE_END_Y-PALETTE_START_Y ,1);}#define ABS(X) ((X) > 0 ? (X) : -(X))/*** @brief 在两点之间描绘轨迹* @param x1: specifies the point 1 x position.* @param y1: specifies the point 1 y position.* @param x2: specifies the point 2 x position.* @param y2: specifies the point 2 y position.* @retval None*/
static void LCD_DrawUniLineCircle(uint16_t x1, uint16_t y1, uint16_t x2, uint16_t y2,uint8_t thick )
{int16_t deltax = 0, deltay = 0, x = 0, y = 0, xinc1 = 0, xinc2 = 0, yinc1 = 0, yinc2 = 0, den = 0, num = 0, numadd = 0, numpixels = 0, curpixel = 0;deltax = ABS(x2 - x1); /* The difference between the x's */deltay = ABS(y2 - y1); /* The difference between the y's */x = x1; /* Start x off at the first pixel */y = y1; /* Start y off at the first pixel */if (x2 >= x1) /* The x-values are increasing */{xinc1 = 1;xinc2 = 1;}else /* The x-values are decreasing */{xinc1 = -1;xinc2 = -1;}if (y2 >= y1) /* The y-values are increasing */{yinc1 = 1;yinc2 = 1;}else /* The y-values are decreasing */{yinc1 = -1;yinc2 = -1;}if (deltax >= deltay) /* There is at least one x-value for every y-value */{xinc1 = 0; /* Don't change the x when numerator >= denominator */yinc2 = 0; /* Don't change the y for every iteration */den = deltax;num = deltax / 2;numadd = deltay;numpixels = deltax; /* There are more x-values than y-values */}else /* There is at least one y-value for every x-value */{xinc2 = 0; /* Don't change the x for every iteration */yinc1 = 0; /* Don't change the y when numerator >= denominator */den = deltay;num = deltay / 2;numadd = deltax;numpixels = deltay; /* There are more y-values than x-values */}for (curpixel = 0; curpixel <= numpixels; curpixel++){//判断边界if(x+thick>LCD_X_LENGTH || x-thick<0 || //液晶左右边界y+thick>LCD_Y_LENGTH || y-thick<0 ) //液晶上下边界continue;ILI9341_DrawCircle(x,y,thick,1); /* Draw the current pixel */num += numadd; /* Increase the numerator by the top of the fraction */if (num >= den) /* Check if numerator >= denominator */{num -= den; /* Calculate the new numerator value */x += xinc1; /* Change the x as appropriate */y += yinc1; /* Change the y as appropriate */}x += xinc2; /* Change the x as appropriate */y += yinc2; /* Change the y as appropriate */}
}/* ------------------------------------------end of file---------------------------------------- */
**
其他配置：
**
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