Revision 0:3a4635fed714, committed 2015-03-11

Comitter:

adhithyan15

Date:

Wed Mar 11 20:24:51 2015 +0000

Commit message:

Base teacher program for Xbee clicker

Changed in this revision

diff -r 000000000000 -r 3a4635fed714 main.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Wed Mar 11 20:24:51 2015 +0000
@@ -0,0 +1,285 @@
+/**
+ * XBee Example Test
+ * A test application that demonstrates the ability
+ * of transmitting serial data via an XBee module with
+ * an mbed microprocesor.
+ * By: Vlad Cazan
+ * Date: Tuesday, September 29th 2009
+ */
+
+#include "mbed.h"
+#include "rtos.h"
+#include <string>
+#include <vector>
+
+Serial xbee1(p9, p10); //Creates a variable for serial comunication through pin 9 and 10
+DigitalOut rst1(p11); //Digital reset for the XBee, 200ns for reset
+DigitalOut myled(LED3);//Create variable for Led 3 on the mbed
+DigitalOut myled2(LED4);//Create variable for Led 4 on the mbed
+vector<string> studentNames;
+vector<string> serialNumbers;
+vector<string> studentIds;
+Serial pc(USBTX, USBRX);//Opens up serial communication through the USB port via the computer
+char c;
+PinName _tx = p9;
+PinName _rx = p10;
+
+int ConfigMode()
+{
+    int a;
+    Serial DATA(_tx,_rx);
+    wait(2);
+    DATA.printf("+++");
+    while (a != 75) {
+        if (DATA.readable()) {
+            a = DATA.getc();
+        }
+    }
+    wait(1);
+    printf("Configuration Complete!\n\n");
+    return 1;
+}
+
+int GetSerial(int *serial_no)
+{
+    //pc.printf("Start - GetSerial");
+    int sh1,sh2,sh3,sl1,sl2,sl3,sl4;
+    Serial DATA(_tx,_rx);
+    wait_ms(50);
+    DATA.printf("ATSL \r");
+    DATA.scanf ("%2x%2x%2x%2x",&sl1,&sl2,&sl3,&sl4);
+    wait_ms(500);
+    DATA.printf("ATSH \r");
+    DATA.scanf ("%2x%2x%2x",&sh1,&sh2,&sh3);
+ 
+    serial_no[0] = sh1;
+    serial_no[1] = sh2;
+    serial_no[2] = sh3;
+    serial_no[3] = sl1;
+    serial_no[4] = sl2;
+    serial_no[5] = sl3;
+    serial_no[6] = sl4;
+    //pc.printf("End - GetSerial");
+    return 1;
+}
+
+int SetKey(char* key)
+{
+    //pc.printf("Start - SetKey");
+    Serial DATA(_tx,_rx);
+    DATA.printf("ATEE 0 \r");
+    char sec_key[8] = {'h','e','l','l','o','m','o','b'};
+    DATA.scanf ("%*s");
+    wait_ms(1);
+    DATA.printf("ATKY %s \r",sec_key);
+    DATA.scanf ("%*s");
+    //pc.printf("End - SetKey");
+    return 1;
+}
+
+int SetPanId(int pan_id)
+{
+    //pc.printf("Start - PanId");
+    Serial DATA(_tx,_rx);
+    wait_ms(5);
+    DATA.printf("ATID %i\r",pan_id);
+    DATA.scanf ("%*s");
+    //pc.printf("End - PanID");
+    return 1;
+}
+
+int WriteSettings()
+{
+    //pc.printf("Start - WriteSettings");
+    Serial DATA(_tx,_rx);
+    wait_ms(5);
+    DATA.printf("ATWR \r");
+    DATA.scanf ("%*s");
+    //pc.printf("End - WriteSettings");
+    return 1;
+}
+
+int ExitConfigMode()
+{
+    //pc.printf("Start - ExitConfig");
+    Serial DATA(_tx,_rx);
+    wait_ms(5);
+    DATA.printf("ATCN \r");
+    DATA.scanf ("%*s");
+    //pc.printf("End - ExitConfig");
+    return 1;
+}
+
+void Reset()
+{
+    //pc.printf("Start - Reset");
+    rst1 = 0;
+    wait_ms(10);
+    rst1 = 1;
+    wait_ms(1);
+    //pc.printf("End - Reset");
+}
+
+int read_sentence(char* input){
+
+    char tmp;
+    while(!pc.readable());
+    tmp = pc.getc();
+    pc.putc(tmp);
+    int counter = 0;
+    while(tmp != '\n'){
+        input[counter] = tmp;
+        if(pc.readable()){
+            tmp = pc.getc();
+            pc.putc(tmp);
+            counter++;
+        } 
+    }
+    
+    pc.printf("\n");
+    return counter-1;
+}
+
+int read_xbee_sentence(char* input){
+    char tmp;
+    while(!xbee1.readable());
+    tmp = xbee1.getc();
+    int counter = 0;
+    while(tmp != '\n'){
+        input[counter] = tmp;
+        if(xbee1.readable()){
+            tmp = xbee1.getc();
+            counter++;
+        } 
+    }
+    return counter;
+}
+
+void print_assessment_available(void const *args){
+  pc.printf("Broadcasting assessment available message to all the clickers in the room!\n");
+  while(1){
+   xbee1.printf("Available\n");
+   Thread::wait(100);
+  }
+}
+
+int main() {
+    rst1 = 0; //Set reset pin to 0
+    myled = 0;//Set LED3 to 0
+    myled2= 0;//Set LED4 to 0
+    wait_ms(1);//Wait at least one millisecond
+    rst1 = 1;//Set reset pin to 1
+    wait_ms(1);//Wait another millisecond
+    pc.printf("Teacher Machine\n");
+    pc.printf("Start a new assessment? (y/n)\n");
+    char sentence_store[255];
+    char begin_assessment = 'o';
+    char temp;
+    int char_count;
+    while(begin_assessment == 'o'){
+      if(pc.readable()){
+         temp = pc.getc();   
+      }
+      if(temp == 'y' || temp == 'n' || temp == 'Y' || temp == 'N'){
+         begin_assessment = temp;   
+      }
+    }
+    pc.putc(begin_assessment);
+    pc.printf("\n");
+    if(begin_assessment == 'n' || begin_assessment == 'N'){
+      pc.printf("Ok. This program will exit momentarily");   
+    }else{
+        pc.printf("Great! The assessment process begins!\n");
+        pc.printf("We are configuring a few things. Wait for a few seconds!\n");
+        int device_serial[8];
+        char sec_key[8] = {'h','e','l','l','o','m','o','b'};
+        int pan_id = 5;
+        int assessment_id = rand() % 100 + 1;
+        ConfigMode();
+        GetSerial(device_serial);
+        SetKey(sec_key);
+        SetPanId(pan_id);
+        WriteSettings();
+        //ExitConfigMode();
+        Reset();
+        pc.printf("Your students will need these parameters to configure their clickers!\n");
+        pc.printf("Channel Number: %d\n", pan_id);
+        pc.printf("How many questions are going to be in the assessment?\n");
+        char_count = read_sentence(sentence_store);
+        int number_of_questions;
+        number_of_questions = atoi (sentence_store);
+        char answer_store[number_of_questions];
+        pc.printf("Please enter the correct answer for each of the questions\n");
+        for(int j = 0;j < number_of_questions; j++){
+            pc.printf("Question %d - Correct Answer: ",j+1);
+            read_sentence(sentence_store);
+            answer_store[j] = sentence_store[0];
+            pc.printf("\n");   
+        }
+        pc.printf("Great! The answer key is now set!\n");
+        pc.printf("The system will start accepting connections\n");
+        pc.printf("Waiting for student clickers to connect!\n");
+        //Thread t(&print_assessment_available);
+        int attack_detector = 0;
+        while (1) {//Neverending Loop
+             // if(pc.readable()){
+            if (xbee1.readable()){
+               string input;
+               char poll_id[255];
+               char_count = read_xbee_sentence(poll_id);
+               char set_poll_id[char_count];
+               for(int i = 0;i < char_count; i++){
+                    set_poll_id[i] = poll_id[i];    
+               }
+               input = string(set_poll_id);
+               pc.printf(input.c_str());
+               pc.printf("\n");
+               if(input.find("C-") != -1 && attack_detector == 0){
+                 int cdash = input.find_last_of("-");
+                 pc.printf("A clicker with #%s is trying to connect\n",input.substr(cdash+1,input.length()-1).c_str());
+                 pc.printf("NReq-%s\n",input.substr(cdash+1,input.length()-1).c_str());
+                 xbee1.printf("NReq-%s\n",input.substr(cdash+1,input.length()-1).c_str());
+                 attack_detector++;
+                 pc.printf("%d",attack_detector);   
+               }else if(input.find("NRes-") != -1 && attack_detector == 1){
+                 pc.printf("The student %s has begun his/her assessment\n",input.substr(15,input.length()-1).c_str());
+                 pc.printf("Requesting his/her ID number\n");
+                 int length = input.length();
+                 int ndash = input.find_last_of("-");
+                 pc.printf("IDReq-%s\n",input.substr(15,length-1).c_str());
+                 xbee1.printf("IDReq-%s\n",input.substr(15,length-1).c_str());
+                 attack_detector++; 
+               }else if(input.find("IDRes-") != -1 && attack_detector == 2){
+                 pc.printf(input.c_str());
+                 pc.printf("The student's ID number is %s\n",input.substr(6,input.length()-1).c_str());
+                 pc.printf("Sending the clicker the question number count\n");
+                 pc.printf("QC-%d-%d\n",assessment_id,number_of_questions);
+                 xbee1.printf("QC-%d-%d\n",assessment_id,number_of_questions);
+                 attack_detector++;   
+               }else if(input.find("QA-") != -1 && attack_detector == 3){
+                 pc.printf("Question count has been acknowledged!\n");
+                 pc.printf("Now waiting for answers to be sent!\n");
+                 attack_detector++;    
+               } else if(input.find("ANS-") != -1 && attack_detector == 4){
+                 pc.printf("Answers from the clicker has been received!\n");
+                 int dash = input.find_last_of("-");
+                 string k = input.substr(dash+1,input.length()-1);
+                 string answer_key;
+                 answer_key = string(answer_store);
+                 int correct = 0;
+                 for(int i = 0; i < answer_key.length(); i++){
+                    if(answer_key[i] == k[i]){
+                      correct++;   
+                    }
+                 }
+                 float grade = (float) (correct/number_of_questions)*100.0;
+                 pc.printf("Output grade - %f\n", grade);
+                 xbee1.printf("GRADE-%f",grade);
+                 attack_detector++;
+                } else if(input.find("AA") != -1){
+                  xbee1.printf("Available\n");   
+                }
+            }
+        }
+     }
+}
\ No newline at end of file

diff -r 000000000000 -r 3a4635fed714 mbed-rtos.lib
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed-rtos.lib	Wed Mar 11 20:24:51 2015 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed-rtos/#63988a2238f7

diff -r 000000000000 -r 3a4635fed714 mbed.bld
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Wed Mar 11 20:24:51 2015 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed/builds/7e07b6fb45cf
\ No newline at end of file