sender.cpp

00001 #include "main.h"
00002 
00003 extern Serial pc;
00004 extern Mail<message_t, 16> mailBox;
00005 DigitalOut myled(LED1);
00006 unsigned int trameSize; 
00007 unsigned int trameCounter;
00008 char trameArray[696];
00009 bool trameReady;
00010 
00011 void Sender_init(void)
00012 {
00013     myled = 0;
00014     trameCounter = 1;
00015     trameSize = 0;
00016     trameReady = false;
00017     
00018     // Enable the pins on the device to use TIMER MAT3.0
00019     LPC_PINCON->PINSEL0 |= 3<<20;
00020     
00021     NVIC_SetVector(TIMER3_IRQn, uint32_t(TIMER3_IRQHandler));
00022     
00023     LPC_SC->PCONP |=1<<23;            //timer3 power on
00024     LPC_TIM3->MR0 = TIME;           //100 msec ??
00025     LPC_TIM3->MCR |= 3;              //interrupt and reset control
00026                                     //3 = Interrupt & reset timer3 on match
00027                                     //1 = Interrupt only, no reset of timer3
00028     LPC_TIM3->TC = 0;                   // clear timer counter
00029     LPC_TIM3->PC = 0;                   // clear prescale counter
00030     LPC_TIM3->PR = 0;                   // clear prescale register
00031     LPC_TIM3->TCR = (1 << 1);               //reset Timer3
00032     LPC_TIM3->IR |= 1 << 0;         // Clear MR0 interrupt flag
00033     LPC_TIM3->EMR |= (3 << 4);        // enable MAT 3.0
00034     
00035     
00036     NVIC_EnableIRQ(TIMER3_IRQn);    //enable timer3 interrupt
00037    
00038 }
00039 
00040 extern "C" void TIMER3_IRQHandler (void)
00041 {    
00042     char current = 0;
00043     char previous = 0;
00044     
00045     if((LPC_TIM3->IR & 0x01) == 0x01)   // if MR0 interrupt, proceed
00046      {
00047         LPC_TIM3->IR |= 1 << 0;         // Clear MR0 interrupt flag
00048          
00049         myled =!myled;
00050   
00051         if(trameReady == true) 
00052         {        
00053                       
00054                 if(trameCounter <= trameSize)
00055                 {   
00056                     current = trameArray[trameCounter];
00057                     previous = trameArray[trameCounter-1];
00058                     
00059                     if(current == previous)
00060                     {
00061                         LPC_TIM3->MR0 = (TIME/2);
00062                     } 
00063                     else
00064                     {
00065                         LPC_TIM3->MR0 = (TIME);
00066                     }
00067     
00068                     // next caracter
00069                     trameCounter++;
00070                     
00071                     // Activity light
00072                     myled =!myled;
00073                 }
00074                 else
00075                 {
00076                     // Trame send, wait until a new trame is ready to send
00077                     trameReady = false;
00078                     LPC_TIM3->TCR = 0;
00079                     trameCounter = 1;  
00080                     myled= 0;   
00081                 }
00082             }
00083         }
00084 }
00085 
00086 void Sender_thread(void const *args)
00087 {
00088     Sender_init();
00089     
00090     while(1)
00091     {
00092         if(trameReady == false)
00093         {
00094             osEvent evt = mailBox.get();
00095             if (evt.status == osEventMail) 
00096             {
00097                 message_t *mbTrame = (message_t*)evt.value.p;
00098                 trameSize = mbTrame->size;
00099                 
00100                 strcpy(trameArray, mbTrame->trame.c_str());
00101                 mailBox.free(mbTrame);  
00102                 
00103                 pc.printf("\n\r%s", trameArray);
00104                 pc.printf("\n\r%d", trameSize);
00105                     
00106                 trameReady = true;  
00107                 LPC_TIM3->TCR = 1; 
00108             } 
00109         }
00110     }
00111 }