Revision 34:5345174bfb30, committed 2015-12-19

Comitter:

DeWayneDennis

Date:

Sat Dec 19 21:47:23 2015 +0000

Parent:

33:2ae9a4eb6433

Commit message:

Final Code

Changed in this revision

diff -r 2ae9a4eb6433 -r 5345174bfb30 GSMLibrary.cpp
--- a/GSMLibrary.cpp	Fri Nov 06 20:49:23 2015 +0000
+++ b/GSMLibrary.cpp	Sat Dec 19 21:47:23 2015 +0000
@@ -1,17 +1,14 @@
 //Libraries
 #include "GSMLibrary.h"
-//#include "gsmqueue.h"
 #include <string.h>
 #include "GPRSInterface.h"
-#include "gsmqueue.h"
+
 //Global defines
-#define TIMEOUTLIMIT (SECONDS_TIMEOUT / 1) //Defines how many "ticks" of the GSM will constitute "timeout" of our "watchdog timer"
 #define NUM_SIZE 500
 
 //External variables
 extern Serial pc;   //To print output to computer
-//extern Serial gsm;  //To communicate with GSM
-extern uint8_t buffer[BUFFER_LENGTH];   //DMA queue
+
 GPRSInterface eth(D1,D0, 19200, "ndo","","");
 /**************************************************
  **          GPRS                                 **
@@ -28,7 +25,6 @@
 
 //Internal variables
 gsm_states gsm_current_state = GSM_INITIALIZE;
-int timeout_count = 0;
 char state_chars[] = "iSJICS";  //For debugging - 1 char to represent each state: init, ok, signalstrength, network, turn off notifications, messagemode, read, phone, writesms, del
 char* serverIP;
 TCPSocketConnection sock;
@@ -60,17 +56,6 @@
     pc.printf("S:%c;", state_chars[gsm_current_state]);
 }
  
-//Advance timeout counter; if timeout, return true
-bool gsm_timeOut()
-{
-    if(++timeout_count >= TIMEOUTLIMIT){
-        timeout_count = 0; 
-        gsm_reset();
-        return true;
-    }
-    else
-        return false;     
-}
 
 //Have the GSM send data - L = long, S = short, hh/mm/ss for time, "lat ns" for latitute, "lon we" for longitude
 void gsm_send_data(float L, float Lref, int hh, int mm, int ss, float lat, char ns, float lon, char we)
@@ -121,7 +106,7 @@
     //header information
     
     //begin get request
-    snprintf(num, NUM_SIZE, "%s", "\r\nGET /index.html?");
+    snprintf(num, NUM_SIZE, "%s", "GET /index.html?");
     strcat(gsm_header, num);
     
     //add query parameters
@@ -136,7 +121,6 @@
     snprintf(num, NUM_SIZE, "%s","Connection: Keep-Alive\r\n\r\n");
     strcat(gsm_header, num);
     
-    
     send = true;
 }
  
@@ -152,7 +136,6 @@
 void gsm_reset()
 {
     gsm_current_state = GSM_INITIALIZE;
-    send = false;
 }
  
 //Next state logic -----------------------------------------------------
@@ -165,8 +148,7 @@
     switch(gsm_current_state)
     {
         case GSM_INITIALIZE:
-            timeout_count = 0;  //No AT commands have been sent: this will send the first one
-            printf(">>>INIT\r\n");
+            //printf(">>>INIT\r\n");
             if (eth.init() != NULL) {
                 printf(">>> Could not initialise. Halting!\n");
                 exit(0);
@@ -174,13 +156,13 @@
             gsm_current_state = GSM_CHECK_SIM;
             break;
         case GSM_CHECK_SIM:
-            printf(">>>CHECK SIM\r\n");
+            //printf(">>>CHECK SIM\r\n");
             if (eth.preInit() == true){
                 gsm_current_state = GSM_JOIN;
             }
             break;
         case GSM_JOIN:
-            printf(">>>JOIN\r\n");
+            //printf(">>>JOIN\r\n");
             int join = eth.connect();
             if (join == false || join < 0){
                 //stay here
@@ -193,7 +175,7 @@
             }
             break;
         case GSM_SERVER_IP:
-            printf(">>>SERVER IP\r\n");
+           // printf(">>>SERVER IP\r\n");
             serverIP = "23.251.149.114";
             if(serverIP != NULL)
             {
@@ -204,7 +186,7 @@
             } 
             break;
         case GSM_CONNECT:
-            printf("\r\n>>>CONNECT TO: %s\r\n", serverIP);
+            //printf("\r\n>>>CONNECT TO: %s\r\n", serverIP);
                 if(sock.connect(serverIP,80)){
                     printf("Connected\r\n");
                     gsm_current_state = GSM_SEND;
@@ -214,19 +196,19 @@
                 } 
             break;  
         case GSM_SEND:
-            printf(">>>READY TO SEND\r\n");
-            waitTicks = 6;
-            if(sock.send_all(gsm_header, contentLength)){
-                printf("Data succesfully sent to server\r\n");
-                gsm_current_state = GSM_WAIT;
+            //printf(">>>READY TO SEND\r\n");
+            if(send){
+                if(sock.send_all(gsm_header, contentLength)){
+                    printf("Data succesfully sent to server\r\n");
+                    gsm_current_state = GSM_SEND;
+                    send = false;
+                }
+                else{
+                    printf("Reconnecting to Server...\r\n");
+                    gsm_current_state = GSM_CONNECT;
+                }
             }
-            else{
-                printf("Reconnecting to Server...\r\n");
-                gsm_current_state = GSM_CONNECT;
-            }
-            
-            
-            //gsm_current_state = GSM_SEND;               
+                         
             break;
         case GSM_WAIT:
             //WAIT BETWEEN CONSECUTIVE SENDS
@@ -241,58 +223,6 @@
             pc.printf("This is a state error\r\n");
     }
 }
-
-//Initialize the GSM
-void gsm_initialize(){ 
-     wait(2.3); //Wait for the GSM to turn on properly before doing this initialization
-      SIM_SCGC6 |= SIM_SCGC6_DMAMUX_MASK; //enabling dmamux clock
-      SIM_SCGC7 |= SIM_SCGC7_DMA_MASK;  // enebaling dma clock
-      //pc.printf("initializing DMA...\r\n");
-     // control register mux, enabling uart3 receive
-     DMAMUX_CHCFG0 |= DMAMUX_CHCFG_ENBL_MASK|DMAMUX_CHCFG_SOURCE(8); 
-     
-     // Enable request signal for channel 0 
-     DMA_ERQ = DMA_ERQ_ERQ0_MASK;
-     
-      // select round-robin arbitration priority
-     DMA_CR |= DMA_CR_ERCA_MASK;
-     
-     //enable error interrupt for DMA0 (commented out because we won't use interrupts for our implementation)
-     //DMA_EEI = DMA_EEI_EEI0_MASK;
-     
-     //Address for buffer
-     DMA_TCD0_SADDR = (uint32_t) &UART_D_REG(UART3_BASE_PTR);
-     DMA_TCD0_DADDR = (uint32_t) buffer;
-     // Set an offset for source and destination address
-     DMA_TCD0_SOFF = 0x00; 
-     DMA_TCD0_DOFF = 0x01; // Destination address offset of 1 byte per transaction
-     
-     // Set source and destination data transfer size
-     DMA_TCD0_ATTR = DMA_ATTR_SSIZE(0) | DMA_ATTR_DSIZE(0);
-     
-     // Number of bytes to be transfered in each service request of the channel
-     DMA_TCD0_NBYTES_MLNO = 0x01;
-     // Current major iteration count
-    //DMA_TCD0_CITER_ELINKNO = DMA_CITER_ELINKNO_CITER(BUFFER_LENGTH);
-    //DMA_TCD0_BITER_ELINKNO = DMA_BITER_ELINKNO_BITER(BUFFER_LENGTH);
-    // Adjustment value used to restore the source and destiny address to the initial value
-    // After reading 'len' number of times, the DMA goes back to the beginning by subtracting len*2 from the address (going back to the original address)
-    DMA_TCD0_SLAST = 0;   // Source address adjustment
-    //DMA_TCD0_DLASTSGA = -BUFFER_LENGTH;  // Destination address adjustment   
-    // Setup control and status register
-    DMA_TCD0_CSR = 0;
-       
-    // enable interrupt call at end of major loop
-    DMA_TCD0_CSR |= DMA_CSR_INTMAJOR_MASK;
-    
-    //Activate dma transfer rx interrupt
-    UART_C2_REG(UART3) |= UART_C2_RIE_MASK;
-    UART_C5_REG(UART3) |= UART_C5_RDMAS_MASK | UART_C5_ILDMAS_MASK | UART_C5_LBKDDMAS_MASK;
-    //activate p fifo register
-    UART_PFIFO_REG(UART3) |= UART_PFIFO_RXFE_MASK; //RXFE and buffer size of 1 word
-    //queueInit();
-    pc.printf("done...\n\r");
-}
  
 //For debugging: print registers related to DMA and UART setup
 void print_registers()

diff -r 2ae9a4eb6433 -r 5345174bfb30 GSMLibrary.h
--- a/GSMLibrary.h	Fri Nov 06 20:49:23 2015 +0000
+++ b/GSMLibrary.h	Sat Dec 19 21:47:23 2015 +0000
@@ -3,8 +3,6 @@
 
 #include "mbed.h"
 
-//#define TIME_CONST 1    //Specify length of each GSM tick (currently called twice every 2 seconds, so an average of every 1 second)
-#define SECONDS_TIMEOUT 30
 #define SMS_END_CHAR "\x1A"     //Character that must be appended to end of text message before it will be sent
 #define SMS_ESCAPE_CHAR "\x1A"  //Character that can be appended to end of text message to abort sending it
 
@@ -19,13 +17,9 @@
 
 //GSM state machine
 void gsm_tick();
-bool gsm_timeOut();
 void gsm_printState();
 void gsm_nextStateLogic();
 
-//Initialize DMA data transfer, and UART3.
-void gsm_initialize();
-
 //returns 1 for ready to send again, 0 for busy.
 bool gsm_ready();
 

diff -r 2ae9a4eb6433 -r 5345174bfb30 gsmqueue.cpp
--- a/gsmqueue.cpp	Fri Nov 06 20:49:23 2015 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,230 +0,0 @@
-#include "gsmqueue.h"
-#include "GSMLibrary.h"
-#include <string.h>
-
-/* gsmqueue.cpp
- * Contains functions to read from the DMA buffer in a queue fashion
- */
- 
-#define LAST_UNPRINTABLE_CHAR 31
-
-//External variables
-extern Serial pc;   //Print data to serial connection with computer
-//Serial gsm(D3,D2);  //UART connection with GSM
-
-//Internal variables for a queue (wrap-around implementation)
-//Note that the DMA (direct memory access) stores data in this queue. Therefore, QUEUETAIL is incremented
-//by the DMA and we only read its value. Our queue's purpose is to read data communicated to us 
-//by the GSM without having to consume processor cycles. Unfortunately when we write data to the Serial
-//port, the DMA will still write it to the buffer. For this reason, the sendCommand() function counts
-//the number of characters we send over UART so we can ignore those characters in the queue.
-char buffer[BUFFER_LENGTH];  //Stores the characters in the queue
-char* queueHead;    //Queue head - marks where to read from next
-char* queueHeadExp; //Expected location of queueHead after gsm.puts() finishes executing
-
-
-//Public functions ------------------------------------------------------------------------------
-//Initialize variables
-void queueInit()
-{
-    //The buffer is initialized in GSMLibrary.cpp
-    queueHead = QUEUETAIL;
-    queueHeadExp = queueHead;
-}
-
-//Send gsm a command (don't forget to flush queue and increment past QUEUETAIL
-//by the number of characters send)
-void sendCommand(char* sPtr)
-{
-    flushQueue();       //This "removes" any characters remaining in the queue
-    int size = strlen(sPtr);
-    if (size > 0 && size <= MAX_SMS_LENGTH)   //Don't send if too long or negative size
-    {
-        //Send the command
-        //gsm.puts(sPtr);
-        //The increment part below: Effectively "removes" characters we just sent from the buffer
-        // by advancing queueHead by size - 1, or size + 2 
-        // size - 1 is because SMS_END_CHAR does not show up on the DMA.
-        // size + 2 is for "\n\r" that gets transmitted after we send the command
-        if (sPtr[size - 1] == SMS_END_CHAR[0])
-        {
-            queueHeadExp = incrementIndex(queueHead, size - 1);
-            // Don't add "\n" because already included in string (this is when we are sending a message)
-        }
-        else
-        {
-            queueHeadExp = incrementIndex(queueHead, size + 2);
-            //gsm.puts("\n"); //make there be a \r\n in what we send (this is perfect.)
-            //Why not "\r\n"? Previously we had thought the extra \r was added due to \r\n coming
-            // through the command line: scanf only removed the \n as whitespace. However, upon
-            // further investigation we realized this behavior occurs because the gsm.puts function
-            // adds a "\r" at the end of your string, independent of whether it was already present
-            // in the string you sent to it. (Except if you only send "\n", in which case it does
-            // not follow it with a "\r".) Thus we need to simply add "\n" because the "\r" is 
-            // already added by the gsm.puts command.
-        }
-        //pc.printf("C:%s\r\n", sPtr); //&debug - to know we have sent this message
-    }
-    else    //Else: error message
-    {
-        //pc.printf("Error: AT command exceeded maximum length");
-        gsm_reset();
-    }
-}
-
-//Return true if GSM has sent complete response already
-//If GSM is idle and queue is not empty, return true
-//If the last command was successfully sent, advance queueHead to queueHeadExp
-bool queueHasResponse()
-{
-    if (getGSMIdleBit())
-    {   //If tail has advanced past the end of our last sent command, queue has new data
-        int dataReceived = queueSize(QUEUETAIL) - queueSize(queueHeadExp);
-        if (dataReceived >= 0)
-            queueHead = queueHeadExp;   //Upon equality, last command was successfully sent
-        return (dataReceived > 0);      //Data received only if characters present beyond "equality" point
-    }
-    else
-        return false;   //Still busy; wait until transmission ended
-}
-
-//Find an occurrence of the given string in the buffer.
-//If advanceQueueHead is true, advance queueHead just until a matching string is found.
-//The given string terminates in NULL (\0)
-bool findInQueue(char* str, bool advanceQueueHead)
-{
-    //Check that string to find is not empty
-    if (*str == NULL) return false;
-    
-    char* head = queueHead;
-    while (head != QUEUETAIL)
-    {
-        //Does the character match the begin char?
-        if (*head == *str){
-            //Check the remaining characters
-            char* sPos = str;
-            char* qPos = 0;
-            for (qPos = head; qPos != QUEUETAIL; qPos = incrementIndex(qPos)){
-                //Compare the next char
-                if (*qPos == *sPos)
-                {
-                    ++sPos; //Increment index (prefix incrementation).
-                    if (*sPos == NULL)   //If finished, update head, return true.
-                    {
-                        head = incrementIndex(qPos);
-                        if (advanceQueueHead)
-                            queueHead = head;
-                        return true;
-                    }
-                }
-                else    //Not equal, so exit for loop and try again at a different location
-                    break;
-            }
-        }
-        //Increment queue index for next iteration
-        head = incrementIndex(head);
-    }
-    //We never succeeded, so return false
-    if (advanceQueueHead)
-        queueHead = head;
-    return false;
-}
-
-//Parse through characters until first integer is found
-//Advance qHead until you reach the next non-numeric character
-//Does not read negative integers; returns -1 if unsuccessful
-int parseInt()
-{
-    //Check if queue is empty first
-    if (queueHead == QUEUETAIL) return -1;
-    
-    //Advance to first numeric character
-    while (!isNumeric(queueHead))
-    {
-        queueHead = incrementIndex(queueHead);
-        if (queueHead == QUEUETAIL) return -1;
-    }
-    
-    //Continue until first non-numeric character
-    int val = 0;
-    while (queueHead != QUEUETAIL && isNumeric(queueHead))
-    {
-        val *= 10;
-        val += (int)(*queueHead - '0');
-        queueHead = incrementIndex(queueHead);
-    }
-    return val;
-}
-
-//$debug - print queue elements
-void printQueue()
-{
-    char* qPos = queueHead;
-    pc.printf("Q:");
-    while (qPos != QUEUETAIL)
-    {
-        //Print the current character
-        if (*qPos <= LAST_UNPRINTABLE_CHAR)
-        {
-            if (*qPos == '\n')
-                pc.printf("\\n");
-            else if (*qPos == '\r')
-                pc.printf("\\r");
-            else
-                pc.printf("\0%x", *qPos);
-        }
-        else    
-            pc.printf("%C",*qPos);
-        
-        
-        //Increment index
-        qPos = incrementIndex(qPos);
-    }
-}
-
-
-//Internal functions ---------------------------------------------------------------------------------
-
-//Get the GSM DMA idle bit (if 1, indicates we already received a response)
-bool getGSMIdleBit()
-{
-    return (UART_S1_IDLE_MASK & UART_S1_REG(UART3)) >> UART_S1_IDLE_SHIFT;
-}
-
-//Returns true if the character is numeric
-bool isNumeric(char* qPos)
-{
-    return ('0' <= *qPos && *qPos <= '9');
-}
-
-//Increment queue position by 1 (Note: this function is only used by gsmqueue.cpp)
-char* incrementIndex(char* pointerToIncrement)
-{
-    if((pointerToIncrement + 1) < (buffer + BUFFER_LENGTH))
-        return (pointerToIncrement + 1);
-    else
-        return buffer;
-}
-
-//Increment queue position by n (Note: this function is only used by gsmqueue.cpp)
-char* incrementIndex(char* pointerToIncrement, int n)
-{
-    int initialIndex = pointerToIncrement - buffer;
-    int incrementedIndex = (initialIndex + n) % BUFFER_LENGTH;
-    return incrementedIndex + buffer;
-}
-
-//Get size of the queue from reference point of tail parameter
-int queueSize(char* tail)
-{
-    int headDiff = queueHead - buffer;
-    int tailDiff = tail - buffer;
-    return (tailDiff + BUFFER_LENGTH - headDiff) % BUFFER_LENGTH;
-}
-
-//Clear queue (Note: this function is only used by gsmqueue.cpp)
-void flushQueue()
-{
-    queueHead = QUEUETAIL;   
-}
-

diff -r 2ae9a4eb6433 -r 5345174bfb30 gsmqueue.h
--- a/gsmqueue.h	Fri Nov 06 20:49:23 2015 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,54 +0,0 @@
-#ifndef GSMQUEUE_H
-#define GSMQUEUE_H
-
-/* gsmqueue.h
- * Contains functions to read from the DMA buffer in a queue fashion
- */
-
-//Memory block of char size alocated for DMA
-#define BUFFER_LENGTH 2000
-#define MAX_SMS_LENGTH 700    //Absolute SMS length max = 900 (let's do 700 to be safe)
-#define QUEUETAIL (char*)DMA_TCD0_DADDR
-
-
-//Public functions ------------------------------------------------------------------------------
-//Initialize variables 
-void queueInit();
-
-//Send gsm a command
-void sendCommand(char* sPtr);
-
-//Return 1 if queue has data and the GSM is done transmitting its response
-bool queueHasResponse();
-
-//Find an occurrence of the given string in the buffer.
-//If advanceQueueHead is true, advance queueHead just until a matching string is found.
-bool findInQueue(char* str, bool advanceQueueHead);
-
-//Parse through characters until first integer is found
-int parseInt();
-
-//Print queue elements
-void printQueue();   //for debugging
-
-
-//Internal functions ------------------------------------------------------------------------------
-//Get the GSM DMA idle bit (if 1, indicates we aren't in the process of receiving a response)
-bool getGSMIdleBit();
-
-//Returns true if the character is numeric
-bool isNumeric(char* qPos);
-
-//Increment queue position by 1 (Note: this function is only used by gsmqueue.cpp)
-char* incrementIndex(char* pointerToIncrement);
-
-//Increment queue position by n (Note: this function is only used by gsmqueue.cpp)
-char* incrementIndex(char* pointerToIncrement, int n);
-
-//Get size of the queue from reference point of tail parameter
-int queueSize(char* tail);
-
-//Clear queue (Note: this function is only used by gsmqueue.cpp)
-void flushQueue();
-
-#endif
\ No newline at end of file