Adhithya Rajasekaran
Base teacher program for Xbee clicker
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