effect

As shown in the figure:

technological process

User login - > function selection - > corresponding function

thinking

• For the use of the whole software, the acquisition of touch screen coordinate points is indispensable, so we open a separate thread to obtain touch screen coordinate points and run from beginning to end

• Then, considering that there are two forms of password login, we have to open two threads to handle it. We can set a global variable whether to log in, and then cycle all the time when we don't log in, so the problem of login can be solved

• Next is the function page. When the user logs in the interface, he will jump to the function selection page. What I do here is "order now" on the left and "historical order" on the right

• For "order now", what we need to do is to add or reduce each commodity, and finally place an order. After placing an order, we will store the data of this order number in the corresponding file

• For the "historical order", we need to pay attention to the storage, information processing and layout of the order number. I save trouble here, so only 10 records are displayed

• Another is to create a thread to obtain temperature and humidity, and then display it in the upper left corner in real time after the user logs in

code

Main logic flow

In order to understand the process more clearly, I only show main C. please get the rest from Github https://github.com/MangataTS/GEC6818-project

If you can't open it, you can quickly download it from here: http://acm.mangata.ltd/file/2/project.zip

#include <stdio.h>
#include <pthread.h>
#include "picture.h"
#include "getxy.h"
#include "font.h"
#include "UARTdh11.h"
#include "RFID.h"
#include <stdbool.h>
#include <string.h>
#include <termios.h>
#include <stdlib.h>
#include <time.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>

#define true 1
#define false 0
#define PASSLEN 4
//************Material content************
char *number[]={//number
        "sucai/0.bmp",
        "sucai/1.bmp",
        "sucai/2.bmp",
        "sucai/3.bmp",
        "sucai/4.bmp",
        "sucai/5.bmp",
        "sucai/6.bmp",
        "sucai/7.bmp",
        "sucai/8.bmp",
        "sucai/9.bmp",
};
char *del="sucai/del.bmp";
char *login="sucai/login.bmp";
char *background="sucai/back.bmp";
char *whiteblock="sucai/whiteblock.bmp";
char *shownumbers="sucai/shownumbers.bmp";
char *Error_login="sucai/errorlogin.bmp";
char *Login_Logo="sucai/login_logo.bmp";
char *NC[]={
        "sucai/CMWZ.bmp",
        "sucai/FMYZC.bmp",
        "sucai/KKNC.bmp",
        "sucai/LMBH.bmp"
};
char *JGB="sucai/JGB.bmp";
char *XIADAN="sucai/XDCN.bmp";
//************Material content************
int locpass=0;
int tolid = 0;
struct Good{
    int value;
    int number;
    char name[20];
};
int IDok;	//Identification default failed 0 failed 1 succeeded
char a[20][40];
extern char WsdString[20];

void *Pcamera(void *arg);

#if 1
//Initialization, read information from file
void Message_init(){
    FILE *fp_message = fopen("Message_table.txt","r");
    if(fp_message == NULL) {
        fp_message = fopen("Message_table.txt","w");
        fclose(fp_message);
        return;
    }
    char buf[40];
    while(fgets(buf,40,fp_message)){//Read these order information
       strcpy(a[tolid++],buf);
       tolid %= 10;//Limit reading ten
    }
    fclose(fp_message);
}
//Display main interface
void show_Main(){
    show_anybmp(background,0,0);//background
    show_anybmp(Login_Logo,90,90);//logo
    Init_Font();
    Display_characterX(300,0,"Whole milk tea",0x00D2691E,3);
    UnInit_Font();
    //Display numeric keypad
    for(int x = 310,i = 1;i <= 3; ++i,x += 60){
        for(int y = 240,j = 1;j <= 3; ++j,y += 60){
            show_anybmp(number[(i-1)*3+j],x,y);
        }
    }
    show_anybmp(number[0],360,420);//Number 0
    show_anybmp(del,590,240);//Delete key
    show_anybmp(login,590,340);//Login key
    show_anybmp(shownumbers,280,90);//Displays the number entered
}
//Order interface
void show_Right(struct Good *goods){
    Init_Font();
    Clean_Area(0, 0,  800, 480, 0x00FFFFFF);
    printf("YES2\n");
    show_anybmp(NC[0],250,0);
    show_anybmp(NC[1],500,0);
    show_anybmp(NC[2],250,240);
    show_anybmp(NC[3],500,240);
    show_anybmp(JGB,700,0);
    //The upper left corner of the item displays the quantity of the item
    char num[10];
    Clean_Area(250,0,20,20,0x00FF0000);
    sprintf(num,"%d",goods[0].number);
    Display_characterX(250,0,num,0x00FFFFFF,1);

    Clean_Area(500,0,20,20,0x00FF0000);
    sprintf(num,"%d",goods[1].number);
    Display_characterX(500,0,num,0x00FFFFFF,1);

    Clean_Area(250,240,20,20,0x00FF0000);
    sprintf(num,"%d",goods[2].number);
    Display_characterX(250,240,num,0x00FFFFFF,1);

    Clean_Area(500,240,20,20,0x00FF0000);
    sprintf(num,"%d",goods[3].number);
    Display_characterX(500,240,num,0x00FFFFFF,1);

    //The upper left corner of the item displays the quantity of the item
    //logo?
    int sum_number = 0;
    int sum_value = 0;
    for(int i = 0;i < 4; ++i){
        sum_number += goods[i].number;//Total quantity
        sum_value += goods[i].value * goods[i].number;//Total value
    }
//    Display_characterX(10,10, "temperature and humidity:", 0x00D2691E,2);
    Display_characterX(10,90,WsdString,0x00D2691E,2);

    Display_characterX(10,300,"number:",0x00D2691E,2);
    sprintf(num,"%d",sum_number);
    Display_characterX(120,300,num,0x00D2691E,2);

    Display_characterX(10,350,"total:",0x00D2691E,2);
    sprintf(num,"%d￥",sum_value);
    Display_characterX(120,350,num,0x00D2691E,2);

    Clean_Area(0,0,250,80,0x00FFD700);//Back button
    Display_characterX(65,20,"return",0x00FFFFFF,3);
    Clean_Area(0,400,250,80,0x00FFD700);//confirm button
    Display_characterX(10,420,"Confirm order",0x00FFFFFF,3);

    //quantity
//  Items in the upper left corner
    Clean_Area(250, 200,  199, 40, 0x00FFF0F5);
    Display_characterX(250,180,"-",0x00D2691E,5);
    Display_characterX(350,180,"+",0x00D2691E,5);
//  Items in the upper right corner
    Clean_Area(500, 200,  199, 40, 0x00FFF0F5);
    Display_characterX(500,180,"-",0x00D2691E,5);
    Display_characterX(600,180,"+",0x00D2691E,5);
//  Items in the lower left corner
    Clean_Area(250, 440,  199, 40, 0x00FFF0F5);
    Display_characterX(250,420,"-",0x00D2691E,5);
    Display_characterX(350,420,"+",0x00D2691E,5);
//  Items in the lower right corner
    Clean_Area(500, 440,  199, 40, 0x00FFF0F5);
    Display_characterX(500,420,"-",0x00D2691E,5);
    Display_characterX(600,420,"+",0x00D2691E,5);
    UnInit_Font();
}
void Faild_login(){
    show_anybmp(Error_login,100,90);
    sleep(1);//Sleep for 1s
    show_Main();//Clear the main interface
    locpass = 0;//Move the password pointer to the beginning
}
//Password thread
int is_in(int x,int y,int startx,int starty,int endx,int endy){//Judge whether the touch point is within this point
    if(x >= startx && x <= endx && y >= starty && y<= endy){//If within this range, 1 is returned
        return 1;
    }
    return 0;
}
//
void *Ppass(void *arg)
{
    char password[4];
    char *banzipassword="4399";//Built in password
    while(!IDok)
    {
//        printf("(%d,%d)\n",x,y);
        if(x == -1 || y == -1) continue;
        if(x > 590 && x < 690 && y > 240 && y < 300){//Click the delete box is_in(x,y,590,240,690,300)
            if(locpass == 0) {//Indicates that the password box is empty
                printf("The password box is empty!\n");
            }
            else{//Delete operation
                locpass--;
                show_anybmp(whiteblock,280+60*locpass,90);//Overwrite previous position
            }
            x = y = 0;
        }
        else if(x > 590 && x < 690 && y > 340 && y < 400){//Click the login box is_in(x,y,590,340,690,400)
            if(locpass != 4){
                printf("Password box is not full!\n");
            }
            else{
                int fg = true;
                for(int i = 0;i < PASSLEN; ++i) {
                    if(password[i] != banzipassword[i]){
                        fg = false;
                    }
                }
                if(fg) {//If so, display the reward picture
                    printf("The password is correct!\n");
                    x = y = 0;
                    IDok = 1;
                    printf("Pass password authentication!\n");
                }
                else {//If you're wrong
                    printf("Wrong password!\n");
                    Faild_login();
                }
            }
            x = y = -1;
        }
        else{
            if(locpass == 4) {//The password box is full
                printf("The password box is full!\n");
            }
            else{//Click the number box
                int locnumber;
                for(int XX = 310,i = 1;i <= 3; ++i,XX += 60){
                    for(int YY = 240,j = 1;j <= 3; ++j,YY += 60){
                        if(x > XX && x < (XX + 60) && y > YY && y < (YY + 60)){//is_in(x,y,XX,YY,XX+60,YY+60)
                            locnumber = (i-1)*3+j;
                            show_anybmp(number[locnumber],280+locpass*60,90);//Displays the number entered
                            password[locpass++] = '0'+locnumber;
                        }
                    }
                }
                if(x > 360 && x < 420 && y > 420 && y < 480) {//Number 0 is_ in(x,y,360,420,420,480)
                    locnumber = 0;
                    show_anybmp(number[locnumber], 280 + locpass * 60, 90);
                    password[locpass++] = '0' + locnumber;
                }
            }
            x = y = -1;
        }
    }
    pthread_exit(NULL); //Exit the thread
}
//RFID thread
void *Prfid(void *arg)
{
    //1. Open serial port device
    int fd = open("/dev/ttySAC1" , O_RDWR|O_NOCTTY);
    if(fd < 0)
    {
        perror ("open failed 1");
        exit(0);
    }
    printf("fd = %d\n",fd);
    //2. Initialize serial port
    set_serial_uart(fd);
    char request[8] = {0};
    get_Sjz(request);
    char fpz[9] = {0};
    get_Fpz(fpz);
    char buf[10] = {0};
    int ret;
    printf("[%d]\n", __LINE__);
    while(!IDok)
    {
        printf("[%d]\n", __LINE__);
        ret = write(fd, request, 7);
        printf("write ret = %d\n",ret);
        for(int i = 0;i < 7; ++i) {
            printf("%x",request[i]);
        }
        putchar('\n');
        ret = read(fd, buf, 10);
        printf("read ret = %d\n",ret);
        printf("buf[2] = %x\n",buf[2]);
        printf("[%d]\n", __LINE__);
        if(ret > 0)
        {
            if(buf[2] == 0)
            {
                printf("Request succeeded\n");
                write(fd, fpz, 8);
                ret = read(fd, buf, 10);
                if(ret > 0)
                {
                    printf("Anti collision\n");
                    if(buf[0] == 0x0a && buf[2] == 0x00){
                        int cardid = (buf[7]<<24) | (buf[6] << 16) | (buf[5] << 8) | buf[4];
                        if(cardid == 0x3D458719){
                            IDok = 1;
                            break;
                        }
                        printf("OX%X\n",cardid);
                        printf("CARDID = 0x%x 0x%x 0x%x 0x%x\n",buf[7],buf[6],buf[5],buf[4]);
                        sleep(2);
                    }
                }
            }
            else
            {
                printf("request was aborted\n");
            }
        }
    }
    printf("exit RFID*****************\n");
    pthread_exit(NULL);	//Exit the thread
}
//Single pop-up window
void submit_table(struct Good *goods){//Submit page
    show_anybmp(XIADAN,200,40);//Display pictures of successful orders
    FILE* fd_table = fopen("Message_table.txt","w");
    char buf[40];
    memset(buf,0,sizeof buf);
    int value = 0;
    for(int i = 0;i < 4; ++i) value += goods[i].value * goods[i].number;
    time_t timep;
    struct tm *p;
    time(&timep);
    p = gmtime(&timep);
    char TIM[20];
    sprintf(TIM,"date:%d-%d-%d ",(int)(1900+p->tm_year),(int)(1+p->tm_mon),(int)p->tm_mday);
    strcat(buf,TIM);
    char HF[20];
    sprintf(HF,"cost: %d",value);
    strcat(buf,HF);
    printf("buf = %s \ntolid = %d\n",buf,tolid);
    strcpy(a[tolid++],buf);
    tolid%=10;
    for(int i = 0;i < 10; ++i) {
        if(strcmp(a[i],""))
            fprintf(fd_table,"%s\n",a[i]);
    }
    fclose(fd_table);
    sleep(1);//Pause for 1s
}

void histoy_submit_table() {
    Init_Font();
    Display_characterX(10,30,WsdString,0x00D2691E,2);
    Clean_Area(0, 0,  800, 480, 0x00FFE4E1);//Refresh background
    Display_characterX(280,0,"Historical order",0x00D2691E,4);
    Clean_Area(700, 0, 100, 80, 0x00DCDCDC);//Return box
    Display_characterX(690,15,"return",0x00D2691E,3);
    //This order is the five on the left
    int cnt = 0;
    for(int i = 0;i < 5; ++i) {
        if(strcmp(a[i],"\n") == 0 || strcmp(a[i],"") == 0) continue;
        a[i][strlen(a[i])-1] ='\0';
        Display_characterX(0,80 + cnt * 80,a[i],0x00FFFFFF,2);
        cnt++;
    }
    for(int i = 5;i < 10; ++i) {
        a[i][strlen(a[i])-1] ='\0';
        if(strcmp(a[i],"\n") == 0 || strcmp(a[i],"") == 0) continue;
        if(cnt < 5) {
            Display_characterX(0,80 + cnt * 80,a[i],0x00FFFFFF,2);
        }
        else {
            Display_characterX(400,80 + (cnt-5) * 80,a[i],0x00FFFFFF,2);
        }
        cnt++;
    }
    while(1){
        Clean_Area(0, 0,  200, 80, 0x00FFE4E1);//Refresh background
        Display_characterX(10,30,WsdString,0x00D2691E,2);
        if(x > 700 && x < 800 && y > 0 && y < 80) {//Return box
            UnInit_Font();
            return;
        }
    }
}

void show_check(){
    Init_Font();
    Clean_Area(0, 0,  400, 480, 0x00FFA500);//Left order
    Display_characterX(50,200,"Immediate order",0x00FF4500,4);
    Clean_Area(400, 0,  400, 480, 0x00AFEEEE);//Right historical order
    Display_characterX(450,200,"Historical order",0x00FF4500,4);
    UnInit_Font();
}

#endif

int main(int argc, char *argv[])
{
    IDok = 0;
    //Initialize device file
    Message_init();//Historical order
    lcd_init();		//LCD screen
    ts_init();		//touch screen
    //Start coordinate acquisition thread
    pthread_t coordTid;
    pthread_create(&coordTid, NULL, getxy, NULL);	//Real time coordinate acquisition
    show_Main();
    //Identity authentication: password identification or RFID
    pthread_t passTid, rfidTid, cameraTid, dht11Tid;
    pthread_create(&passTid, NULL, Ppass, NULL);		//Create password thread
    pthread_create(&rfidTid, NULL, Prfid, NULL);		//Create rfid thread
    pthread_create(&dht11Tid, NULL, funcTH, NULL);		//Create dht11 thread - > temperature and humidity
    while(!IDok);	//Until authentication is successful
    show_check();
    while(1) {
        Init_Font();
        Clean_Area(0, 0,  200, 80, 0x00FFA500);//Temperature and humidity
        Display_characterX(10,10,WsdString,0x00D2691E,2);
        UnInit_Font();
        if(x > 0 && x < 400 && y > 0 && y < 480) {//Left entry point list
            x = y = -1;
            struct Good G[4];
            memset(G,0,sizeof G);
            for(int i = 0;i < 4; ++i) G[i].number = 0;
            G[0].value = 13;//Strawberry balls
            G[1].value = 10;//Honey grapefruit
            G[2].value = 12;//Cocoa milk tea
            G[3].value = 11;//Lemon mint 
            show_Right(G);
            while(1) {
                Init_Font();
                Clean_Area(0, 80,  200, 80, 0x00FFFFFF);//Left order
                Display_characterX(10,90,WsdString,0x00D2691E,2);
                UnInit_Font();
                if(x > 250 && x < 350 && y > 200 && y < 240) {//Delete in upper left corner
                    printf("LEFT_UP_DEL\n");
                    if(G[0].number)
                        G[0].number--;
                    show_Right(G);
                    x = y = -1;
                }
                else if(x > 350 && x < 450 && y > 200 && y < 240) {//Increase in upper left corner
                    printf("LEFT_UP_ADD\n");
                    G[0].number++;
                    show_Right(G);
                    x = y = -1;
                }
                else if(x > 500 && x < 600 && y > 200 && y < 240) {//Delete in the upper right corner
                    printf("RIGHT_UP_DEL\n");
                    if(G[1].number)
                        G[1].number--;
                    show_Right(G);
                    x = y = -1;
                }
                else if(x > 600 && x < 700 && y > 200 && y < 240) {//Increase in upper right corner
                    printf("RIGHT_UP_ADD\n");
                    G[1].number++;
                    show_Right(G);
                    x = y = -1;
                }
                else if(x > 250 && x < 350 && y > 440 && y < 480) {//Delete in the lower left corner
                    printf("LEFT_DOWN_DEL\n");
                    if(G[2].number)
                        G[2].number--;
                    show_Right(G);
                    x = y = -1;
                }
                else if(x > 350 && x < 450 && y > 440 && y < 480) {//Increase of left lower foot
                    printf("LEFT_DOWN_ADD\n");
                    G[2].number++;
                    show_Right(G);
                    x = y = -1;
                }
                else if(x > 500 && x < 600 && y > 440 && y  < 480) {//Delete in the lower right corner
                    printf("LEFT_DOWN_DEL\n");
                    if(G[3].number)
                        G[3].number--;
                    show_Right(G);
                    x = y = -1;
                }
                else if(x > 600 && x < 700 && y > 440 && y < 480) {//Increase in lower right corner
                    printf("RIGHT_DOWN_ADD\n");
                    G[3].number++;
                    show_Right(G);
                    x = y = -1;
                }
                else if(x > 0 && x < 250 && y > 400 && y < 480) {//Demand for order submission
                    printf("SUBMIT_S\n");
                    if(G[0].number + G[1].number + G[2].number + G[3].number == 0){//If it is not selected, it cannot be submitted
                        x = y = -1;
                        continue;
                    }
                    submit_table(G);
                    show_Right(G);
                    x = y = -1;
                }
                else if(x > 0 && x < 250 && y > 0 && y < 80) {//Return to the previous interface
                    x = y = -1;
                    show_check();
                    break;
                }
            }
            x = y = -1;
        }
        else if(x > 400 && x < 800 && y > 0 && y < 480){//Enter historical order
            x = y = -1;
            histoy_submit_table();
            x = y = -1;
            show_check();
        }

    }
    //Resource release
    lcd_close();	//LCD screen
    ts_close();		//touch screen
    return 0;
}

There are many notes here. I believe you can understand them. I won't repeat them one by one

Some small pits

1. After obtaining coordinates every time, be sure to clear them, or manually assign a coordinate point that will not be used, otherwise it will continue to point

2. The serious problem is that the refresh frequency is too high

3. The coordinate points of the control must be planned in advance

4. This font The H font is slightly tilted, so don't try to correct it

5. My makefile has been modified. If you want to run directly, you have to change the makefile. You don't have to say how to change it

6. If the RFID module does not respond, the wire may be loose

7. The read function of RFID module thread is blocked. The reason is unknown

8. Look back