北京邮电大学电子信息嵌入式实验报告.doc

电子工程学院 2008211204嵌入式实验王宁西 08211002电子信息科学与技术专业实验实验报告班级 2008211204姓名 王宁西学号 08211002-第一部分-必做实验:1. 基本实验：搭建PXA270嵌入式LINUX开发软硬件环境；安装LINUX操作系统；安装与配置建立宿主机端交叉编译调试开发环境；配置宿主机 PC 机端的minicom（或超级终端）、TFTP服务、NFS服务，使宿主PC机与PXA270开发板可以通过串口通讯，并开通TFTP和NFS服务。2. 人机接口：键盘驱动；LCD控制；触摸屏数据采集与控制实验；3. 应用实验：完成VGA显示；Web服务器实验；网络文件传输实验；多线程应用实验。4. 应用实验扩展应用：完成USB摄像头驱动与视频采集；GPS实验；GSM/GPRS通讯；视频播放移植；USB蓝牙设备无线通讯；NFS文件服务器；蓝牙视频文件服务器。5. QT实验：完成基本嵌入式图形开发环境搭建；“Hello world！”QT初探；创建一个窗口并添加按钮；对象通信：Signal和Slot；菜单和快捷键；工具条和状态栏；鼠标和键盘事件；对话框；QT的绘图；俄罗斯方块；基于QT的GSM手机在嵌入式LINUX下的设计与实现。实验体会：以前没有接触过LINUX系统，也没有用LINUX、C对硬件进行开发过。此次实验的必做部分提供了详细的实验步骤和一些必要信息，因此必做实验完成起来基本没有难度。但通过必做实验要熟悉驱动程序框架、目标板相关板块开发的细节，以及扩展功能的实现方法。因为此次实验在知识上有一定的跨度，所以必做实验提供的代码对于加深理解和加快学习速度有很大帮助。通过实践和分析实验手册上提供的实验步骤，可以直观地了解每一个步骤的作用及意义。必做实验也为选做实验提供了一个拓展平台，为最后设计综合实验的相关知识进行了强化。-第二部分-选做实验：（以下是本人所选题目以及完成情况）1. 基于LCD、键盘、触摸屏设计实现对PXA270开发系统上的LCD上彩色条竖纹或彩色圆环等变化控制。流程图：Heng() 画横条输入1If判断主程序main开始Main 结束Shu() 画竖条输入0程序：#include #include #include #include / open() close()#include / read() write()#include #define DEVICE_NAM /dev/keypad#define DEVICE_NAME /dev/fb#define VERSION PXA2700EP-LCD-V1.00-060530void showversion(void) printf(*n); printf(t %s tn, VERSION); printf(*nn);/- main -void heng(void)unsigned short buf640*480;int i;int ret;int fd;fd = open(DEVICE_NAME,O_RDWR); for(i=0;i640*480/8;i+) bufi=0x0001; for(i=640*480/8;i640*480*2/8;i+) bufi=0xf800; for(i=640*480*2/8;i640*480*3/8;i+) bufi=0x07ef; for(i=640*480*3/8;i640*480*4/8;i+) bufi=0x001f; for(i=640*480*4/8;i640*480*5/8;i+) bufi=0xffe0; for(i=640*480*5/8;i640*480*6/8;i+) bufi=0x07ff; for(i=640*480*6/8;i640*480*7/8;i+) bufi=0xf81f; for(i=640*480*7/8;i640*480;i+) bufi=0xffff; ret = write(fd,buf,sizeof(buf);void shu(void)unsigned short buf640*480;int i;int j;int ret;int fd;fd=open(DEVICE_NAME,O_RDWR); for(j=0;j480;j+) for(i=640*j;i640*j+640/8;i+) bufi=0x0001; for(i=640*j+640/8;i640*j+640*2/8;i+) bufi=0xf800; for(i=640*j+640*2/8;i640*j+640*3/8;i+) bufi=0x07ef; for(i=640*j+640*3/8;i640*j+640*4/8;i+) bufi=0x001f; for(i=640*j+640*4/8;i640*j+640*5/8;i+) bufi=0xffe0; for(i=640*j+640*5/8;i640*j+640*6/8;i+) bufi=0x07ff; for(i=640*j+640*6/8;i640*j+640*7/8;i+) bufi=0xf81f; for(i=640*j+640*7/8;i0时执行）程序：Pthread.c#include #include #include #include pthread.h#include #include / open() close()#include / read() write()#include #include /#include #include #include #include touch.h#define DEVICE_KEYNAME /dev/keypad#define DEVICE_FBNAME /dev/fb#define BUFFER_SIZE 16int flag=0;Point d;/*-*/ /print circlevoid drawcircle(int x,int y)unsigned short buf640*480;int i,j;int ret;int fd;fd=open(DEVICE_FBNAME,O_RDWR);for(i=0;i480;i+)for(j=0;j640;j+)if (i-y)*(i-y)+(j-x)*(j-x)20000) bufi*640+j=0x07ff;if (i-y)*(i-y)+(j-x)*(j-x)13000) bufi*640+j=0x07ef;if (i-y)*(i-y)+(j-x)*(j-x)lock, NULL); pthread_cond_init(&b-notempty, NULL); pthread_cond_init(&b-notfull, NULL); b-readpos = 0; b-writepos = 0;/*-*/* Store an integer in the buffer */void put(struct prodcons * b, Point data)pthread_mutex_lock(&b-lock); /* Wait until buffer is not full */ while (b-writepos + 1) % BUFFER_SIZE = b-readpos) printf(wait for not fulln); pthread_cond_wait(&b-notfull, &b-lock); /* Write the data and advance write pointer */ b-bufferb-writepos.x = data.x;b-bufferb-writepos.y = data.y; b-writepos+; if (b-writepos = BUFFER_SIZE) b-writepos = 0; /* Signal that the buffer is now not empty */ pthread_cond_signal(&b-notempty);pthread_mutex_unlock(&b-lock);/*-*/* Read and remove an integer from the buffer */void get(struct prodcons * b) Point data;pthread_mutex_lock(&b-lock); /* Wait until buffer is not empty */ while (b-writepos = b-readpos) printf(wait for not emptyn);pthread_cond_wait(&b-notempty, &b-lock); /* Read the data and advance read pointer */ data.x = b-bufferb-readpos.x;data.y = b-bufferb-readpos.y; b-readpos+; if (b-readpos = BUFFER_SIZE) b-readpos = 0; /* Signal that the buffer is now not full */ pthread_cond_signal(&b-notfull); pthread_mutex_unlock(&b-lock);d.x=data.x;d.y=data.y;/ return data;/*-*/Point OVER;Point nn;struct prodcons buffer;/*-*/*-screen input-*/int touchscreen_fd = 0; /* touch screen device handle */ts_event_t ts_CalPointsCAL_POINT_NUM; /* touch screen calibration pBuffer */ / Retrieve an average data from touch screen input deviceint Cal_DataAvg(int ts_handler, ts_event_t * ts_avg, unsigned short max_num) ts_event_t *tmpDataArr; ts_event_t tmpData; unsigned short bp, i; unsigned short count; long tempX, tempY; int ret; static int curr_x = 0, curr_y = 0, curr_p = 0; static int got_curr_x = 0, got_curr_y = 0; int got_curr_p = 0; int next_x, next_y; int got_next_x = 0, got_next_y = 0; struct input_event ev; tmpDataArr = (ts_event_t *)malloc(max_num * sizeof(ts_event_t); if (tmpDataArr = NULL) printf(Error: malloc failed.n); return -1; for (i = 0; i max_num; i+) tmpDataArri.x = 0; tmpDataArri.y = 0; tmpDataArri.pressure = 0; tmpDataArri.flag = -1; / Read a set of data into buffer count = 0;do bp = 0; while (1) memset(&tmpDataArrbp, 0, sizeof(ts_event_t); ret = read(ts_handler, &ev, sizeof(struct input_event); if (ret sizeof(struct input_event) break; if (ev.type = EV_ABS) switch (ev.code) case ABS_X: curr_x = ev.value; break; case ABS_Y: curr_y = ev.value; break; case ABS_PRESSURE: curr_p = ev.value; break; tmpDataArrbp.x = curr_x; tmpDataArrbp.y = curr_y; tmpDataArrbp.pressure = curr_p; if (bp max_num ) bp+; else break; count = bp; while (count = 0); tempX = tempY = 0; for (bp = 0; bp x = tempX / count; ts_avg-y = tempY / count; ts_avg-pressure = 0xffff; / Release free(tmpDataArr);void getpoint(void) char * tsconf_name; Point Screen_PointCAL_POINT_NUM;/* unsigned short x_max, y_max; unsigned short i; */int x_max,y_max;int i; FILE * fp; i = 0;Point xy; touchscreen_fd = open(TOUCHSCREEN_DEV, O_RDONLY); if (touchscreen_fd 0) fprintf (stderr, Cannot open touch screen device %s.n, TOUCHSCREEN_DEV);nn.x=-1; nn.y=-1; /return NULL; else fprintf (stderr, the touch screen device %sis opened.n, TOUCHSCREEN_DEV);fprintf (stderr, please touch the screen to test the driver is workingn); while (1) Cal_DataAvg(touchscreen_fd, &ts_CalPointsi, 10);xy.x=ts_CalPointsi.x;xy.y=ts_CalPointsi.y;flag+;printf(x=%d,y=%d,flag=%dn,xy.x,xy.y,flag);nn=xy;put(&buffer,xy); close(touchscreen_fd);void * screen(void * data) Point n;/* for (n = 0; n %dn, n); put(&buffer, n); */ getpoint(); n.x=-1; n.y=-1; put(&buffer,n); put(&buffer, OVER); printf(screen stopped!n); return NULL;/*-*/void inputpoint()int fd; int ret; unsigned char buff2; char pre_scancode = 0xff;Point xy; fd = open(DEVICE_KEYNAME, O_RDWR); printf(fd = %dn,fd); if (fd = -1) printf(open device %s errorn,DEVICE_KEYNAME); else buff0=0x22; while(1) read(fd,buff,1); if(buff0!=pre_scancode) xy.x=nn.x;xy.y=nn.y; if(buff0!=0xff) if(buff0=0x02) xy.y=xy.y+50; printf(push 2n); if(buff0=0x04) xy.x=xy.x-50; printf(push 4n);if(buff0=0x06) xy.x=xy.x+50; printf(push 6n);if(buff0=0x08) xy.y=xy.y-50; printf(push 8n); if(xy.x0) xy.x=0; /rectifyif(xy.y=640) xy.x=640-1;if(xy.y=480) xy.y=480-1;if(xy.x!=nn.x)|(xy.y!=nn.y)flag+;printf(x=%d,y=%d,flag=%dn,xy.x,xy.y,flag);nn.x=xy.x; nn.y=xy.y;put(&buffer,xy); /if pre pre_scancode = buff0; /while/else ret=close(fd);void * keyboard(void * data) Point n; int i=0;/* while (1) d = get(&buffer); if (d = OVER ) break; printf( %d-getn, d); */ inputpoint(); n.x=-1; n.y=-1; put(&buffer,n); printf(keyboard stopped!n); return NULL;/*-*/void * outp(void * data) /Point d; while (1) if(flag0)flag-;get(&buffer);printf(d=%d,%d flag=%dn,d.x,d.y,flag);if (d.x=-1 & d.y=-1 )break;printf(draw:x=%d,y=%dn,d.x,d.y);drawcircle(d.x,d.y); printf(drawing finished!n); return NULL;/*-*/int main(void) pthread_t th_a, th_b, th_c; void * retval;OVER.x=-1;OVER.y=-1;nn.x=320; nn.y=240; init(&buffer); pthread_create(&th_a, NULL, keyboard, 0); pthread_create(&th_b, NULL, screen, 0);pthread_create(&th_c, NULL, outp, 0); /* Wait until screen and keyboard finish. */ pthread_join(th_a, &retval); pthread_join(th_b, &retval);pthread_join(th_c, &retval); return 0;*说明*Drawcircle(int x, int y) 以(x,y)为中心，画小半径6000，中半径13000，大半径20000的圆环。Cal_DataAvg(int ts_handler, ts_event_t *ts_avg, unsigned short max_num) 从触屏上获取触点坐标(x,y)，存入全局变量nn中。 Nn为Point类型。Inputpoint() 在nn坐标的基础上，从键盘输入进行控制*3. 在QT环境下的图形界面应用程序设计。流程图：（简易计算器）CCounter类顶层对话框建立按键通信显示、反馈信号CDigitalButton对按键功能的实现Main.cpp对顶层对话框类的调用程序：CCounter.h/* * 文件名：CCounter.cpp* 类名：CCounter* 功能：计算器* 作者：WNX* 时间：2011年10月17日* 版本：0.01* */#ifndef _CCELLPHONE_H_#define _CCELLPHONE_H_#include / 包含Qt头文件#include #include #include #include #include #include CDigitalButton.h/ 包含自定义头文件#define iWidthDigital50/ 数字按钮宽度#define iHeightDigital50/ 数字按钮高度#define iWidthOther100/ 其它按钮宽度#define iHeightOther40/ 其它按钮高度#define cAppWidth(iWidthDigital*4)/ 总宽度#define cAppHeight(iWidthDigital*4+iHeightOther*2)/ 总高度#define iWidthOn100/On按钮宽度#define iWidthCancel100/ Cancel按钮宽度#define DisLenth 5#define cDigital1/ 没用到#define cErro2#define cCall3class CCounter : public QDialogQ_OBJECT/ Never forget it when using signal&slotpublic:CCounter ( QWidget * parent = 0, const char * name = 0, bool modal = true );/ 重载构造函数，默认模态CCounter();protected:QLCDNumber *m_pLCD;CDigitalButton *m_pDigitalBtn11;QPushButton *m_pOn;QPushButton *m_pCancel;QPushButton *AddButton;QPushButton *SubButton;QPushButton *MulButton;QPushButton *DivButton;QPushButton *EqlButton;QString m_strLCD;int m_stateLCD;protected:void InitConnect(void);/ 初始化Signal/Slot的连接void InitButton(void);/ 初始化各个按钮public slots:/ 定义插槽void ClearLCDNumber();void AddLCDNumber( const QString& str );void DeleteLCDNumber();void Culculate();void IncCounter();void SubCounter();void MulCounter();void DivCounter();signals:/ 定义信号void LCDChanged( const QString& str );private:int counter;int fh; / +1,-2,*3,/4,=5int flag; /0:clear; 1:un-doint ans;#endifCCounter.cpp#include CCounter.hCCounter:CCounter ( QWidget * parent, const char * name, bool modal ):QDia