main.cpp

00001 #include "mbed.h"
00002 
00003 #include "./Parser.h"
00004 #include "./terminal.h"
00005 
00006 #define DEBUG_CMD_PROCESS
00007 
00008 #define LED_ON   1
00009 #define LED_OFF  0
00010 DigitalOut AlarmLED(LED1);
00011 
00012 
00013 #define RXBUFFERSIZE    128
00014 #define RXBUFFERMASK    0x7F
00015 char receiveBuffer[RXBUFFERSIZE];
00016 unsigned char insertPointRxBuffer;
00017 
00018 Serial pc(USBTX, USBRX);            // tx, rx 
00019 void characterReceivedFromPC();
00020 char globalStartofSentence;
00021 bool globalSentenceFromPCReady;
00022 //extern    char *commandTokens[20];
00023 
00024 
00025 
00026 
00027 // initializeRingBufferAndTokenArray: -----------------------------------------
00028 //
00029 //
00030 //-----------------------------------------------------------------------------
00031 void initializeRingBufferAndTokenArray()
00032 {
00033     insertPointRxBuffer = 0;
00034     globalStartofSentence = 0;
00035 
00036     globalSentenceFromPCReady = false;
00037 
00038     //make sure the array is full of address 0x000's
00039     for (int i = 0; i< 20; i++) {
00040         commandTokens[i] = NULL;
00041         }
00042 }//eo initializeRingBufferAndTokenArray:: =====================================
00043 
00044 
00045 
00046 
00047 // initializeSystem: ----------------------------------------------------------
00048 //
00049 //
00050 //-----------------------------------------------------------------------------
00051 
00052 void initializeSystem(void)
00053 {
00054 //    lcd.printf("Hi Brad\n");
00055 //    lcd.locate(0,1);
00056 //    lcd.printf("row 2\n");
00057  
00058     initializeRingBufferAndTokenArray();
00059     initializePCTerminal(&pc);
00060     clearScreen();
00061     
00062     locateCursor(0, 2);
00063     drawBox(30, 10);
00064     pc.attach(characterReceivedFromPC);  // set calback function to be called when a character is received
00065     
00066     AlarmLED = LED_ON;
00067     wait(0.2);  //wait .2 seconds
00068     AlarmLED = LED_OFF;
00069     wait(0.2);  //wait .2 seconds
00070     AlarmLED = LED_ON;
00071     wait(0.2);  //wait .2 seconds
00072     AlarmLED = LED_OFF;
00073 }//eo initializeSystem:: ======================================================
00074 
00075 
00076 
00077 
00078 // characterReceivedFromPC: ---------------------------------------------------
00079 //
00080 //
00081 //-----------------------------------------------------------------------------
00082 
00083 void characterReceivedFromPC()
00084 {
00085     static unsigned char StartofNextSentence = 0;
00086     while(pc.readable()) 
00087         {
00088         receiveBuffer[insertPointRxBuffer] = pc.getc();
00089         if( receiveBuffer[insertPointRxBuffer] == '$' )
00090             {
00091             StartofNextSentence = insertPointRxBuffer;
00092             }
00093         if( receiveBuffer[insertPointRxBuffer] == '\r' ) 
00094             {
00095             receiveBuffer[insertPointRxBuffer] = '\0';
00096 
00097             //makeSentence available to main loop
00098             globalStartofSentence = StartofNextSentence;
00099             globalSentenceFromPCReady = true;
00100             printf("\n\rsentence rec %s\n\r", &receiveBuffer[StartofNextSentence]);
00101             }
00102         insertPointRxBuffer = (insertPointRxBuffer + 1) & RXBUFFERMASK;
00103         }
00104 }//eo characterReceivedFromPC:: ===============================================
00105 
00106 
00107 
00108 // processCommandMessage: -----------------------------------------------------
00109 // transfer one sentence from incoming receive buffer into a command buffer for parsing
00110 //
00111 // 
00112 //-----------------------------------------------------------------------------
00113 
00114 void processCommandMessage()
00115 {
00116     unsigned char fp = globalStartofSentence;  // initalize fetch point from receive buffer
00117     unsigned char ip = 0;                // initilize insert point into command buffer
00118     
00119     // copy the sentence (which contains a command) from the ring buffer (named receiveBuffer) 
00120     // into a normal linear array named commandBuffer
00121     char commandBuffer[60];
00122     #ifdef DEBUG_CMD_PROCESS
00123     printf("\n\r^^Start of sentence:%d\n\r",  fp);
00124     #endif
00125     while(receiveBuffer[fp] != '\0') 
00126         {
00127         #ifdef DEBUG_CMD_PROCESS
00128         if(pc.writeable()) pc.putc(receiveBuffer[fp]);
00129         #endif
00130         commandBuffer[ip] = receiveBuffer[fp];
00131         ip++;
00132         fp = (fp+1) & RXBUFFERMASK;
00133         }
00134     commandBuffer[ip] = '\0';
00135     
00136     parseCommandSentence(commandBuffer);
00137 
00138     #ifdef DEBUG_CMD_PROCESS
00139     // print out the tokens back to the terminal
00140     {
00141     int  i = 0;  
00142     while (strcmp(commandTokens[i],"END OF TOKENS" )) {
00143         pc.printf("$token %i: %s\n\r",i, commandTokens[i]);
00144         i++;     
00145         }
00146     }
00147     #endif
00148         
00149     if(strcmp(commandTokens[0],"$ST" )== 0) 
00150         {
00151         long newtime = atol(commandTokens[1]); 
00152         #ifdef DEBUG_CMD_PROCESS
00153         pc.printf("Setting time to: %l \n\r ", newtime);
00154         #endif
00155         set_time( newtime); 
00156         //int limitValue = atoi(commandTokens[3]);
00157         //if( *commandTokens[2] == 'U') setUpperLimitForChannel(channel, limitValue);   
00158         //if( *commandTokens[2] == 'L') setLowerLimitForChannel(channel, limitValue);                
00159         }
00160 }//eo processCommandMessage:: =================================================
00161 
00162 
00163 
00164 // main: ----------------------------------------------------------------------
00165 //
00166 //
00167 //-----------------------------------------------------------------------------
00168 
00169 int main() {
00170      set_time(1256729737);
00171     initializeSystem();
00172     
00173     while(1) 
00174         {//so infinite loop ...................................................
00175         if( globalSentenceFromPCReady == true ) 
00176             {
00177             processCommandMessage();
00178             globalSentenceFromPCReady = false;
00179             }
00180         
00181         time_t seconds = time(NULL);
00182         
00183         printf("Time as seconds since January 1, 1970 = %d\n", seconds);
00184         
00185         printf("Time as a basic string = %s", ctime(&seconds));
00186  
00187         char buffer[32];
00188         strftime(buffer, 32, "%I:%M %p\n", localtime(&seconds));
00189         printf("Time as a custom formatted string = %s", buffer);
00190         
00191         
00192        
00193         AlarmLED = LED_OFF;
00194         wait(10);
00195         AlarmLED = LED_ON;
00196         wait(1);
00197         }//eo infinite loop :::::::::::::::::::::::::::::::::::::::::::::::::::
00198         
00199 }//eo main ====================================================================
00200 
00201