Revision 0:ae7a710b93e5, committed 2010-12-04

Comitter:

guruimage

Date:

Sat Dec 04 06:53:45 2010 +0000

Commit message:

HW3B getTime with Synchronization in Slave

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Sat Dec 04 06:53:45 2010 +0000
@@ -0,0 +1,156 @@
+#include "mbed.h"
+
+
+ struct timeval
+{
+ unsigned long long int  tv_sec;        /* Seconds. */
+ unsigned long long int tv_usec;    /* Microseconds. */
+};
+void sync(void);
+void getValue(void);
+void readTime(void);
+void SetupTimer1(void);
+void SetupTimer0(void);
+void Timer1_IRQHandler(void);
+void Timer0_IRQHandler(void);
+unsigned long long int atoi1(char *str);
+void getTime(struct timeval *tv);
+Serial device(p9, p10);
+Serial pc(USBTX, USBRX);
+DigitalOut myled1(LED1);
+DigitalOut myled2(LED2);
+DigitalOut myled3(LED3);
+char* store=new char;
+int i=0;
+int k=0;
+int timeNum=0;
+unsigned long long int t1=0;
+unsigned long long int t2=0;
+unsigned long long int t3=0;
+unsigned long long int t4=0;
+long long int t11=0;
+long long int t22=0;
+long long int t33=0;
+long long int t44=0;
+long long int offset;
+char buffRx[100];
+int handleTrue = 0;
+
+
+int main() {
+wait(0.001);
+for(int i =0;i<100;i++){
+  buffRx[i]=NULL;
+}
+timeval *currentTime = new timeval;
+
+   SetupTimer1();
+   
+   pc.printf("out of the loop!");
+   while(1){
+       wait(1);
+       sync();      
+   }
+}
+   
+void sync(void){
+  char temp1[40];
+  char temp2[40];
+  int numcount=0;
+
+  t1=(unsigned long long int)(LPC_TIM1->TC+4294967296*timeNum);
+  device.putc('s');// send s to initialize synchronization.
+  device.attach(&getValue);
+  if(handleTrue == 1){
+        myled1=!myled1;
+       handleTrue = 0;
+       k=0;
+     if(buffRx[0] == 'd'){
+          t4=(unsigned long long int)(LPC_TIM1->TC+4294967296*timeNum);
+          myled2=!myled2;
+        
+     }
+     for(int i=0; i<40;i++){
+           temp1[i]=NULL;
+           temp2[i]=NULL;
+           }
+     if(buffRx[1] == 'm'){
+          for(int i=2;buffRx[i]!='f';i++){
+              temp1[i-2]=buffRx[i];
+              numcount = i;
+          }
+          t2=atoi1(temp1);
+           for(int i=0; i<40;i++){
+           temp1[i]=NULL;
+           }
+
+          for(int i=numcount+2;buffRx[i]!='n';i++){
+              temp2[i-numcount-2]=buffRx[i];
+          }
+          numcount=0;
+          t3=atoi1(temp2);
+         
+          for(int i=0; i<40;i++){
+            temp2[i]=NULL;
+          }
+
+          t11=(long long int)t1;
+          t22=(long long int)t2;
+          t33=(long long int)t3;
+          t44=(long long int)t4;
+          offset = (long long int)(((t22-t11)-(t44-t33))/2);
+           //LPC_TIM1->TC=LPC_TIM1->TC-offset;
+       for(int i=0;buffRx[i]!=NULL;i++){
+         buffRx[i]=NULL;
+      }
+          //pc.printf("\r\nOffset is %llu!\r\n",offset);
+     }
+      }
+      pc.printf("\r\nT1: %llu, T2: %llu, T3: %llu T4: %llu timeNum: %d\r\nOffset is %lld!\r\n",t1,t2,t3,t4, timeNum,offset);
+          
+}
+
+void getValue(void){
+  buffRx[k]=device.getc();
+  //pc.printf("%c",buffRx[k]);
+  if(buffRx[k]=='n'){
+      handleTrue = 1;
+  }
+      k++;
+}
+
+void SetupTimer1(void)
+{
+ LPC_SC->PCONP |= 1 << 2;     // Power on Timer`
+ LPC_SC->PCLKSEL0 |= 1 << 4;
+ LPC_TIM1->TCR = 0x2;         // Reset and set to timer mode
+ LPC_TIM1->CTCR = 0x0;
+ LPC_TIM1->PR = 0;            // No prescale
+ LPC_TIM1->MR0 = 0xFFFFFFFF;        // Match count for 100mS
+ LPC_TIM1->MCR = 3;           // Interrupt and Reset on Match
+ LPC_TIM1->TCR = 1;           // Enable Timer
+
+ // Enable the ISR vector
+ NVIC_SetVector (TIMER1_IRQn, (uint32_t)&Timer1_IRQHandler);
+ NVIC_EnableIRQ(TIMER1_IRQn);
+}
+void Timer1_IRQHandler(void)
+{
+ timeNum++;
+ LPC_TIM1->IR = 1;
+}
+
+void getTime(struct timeval *tv) {
+      tv->tv_sec=(unsigned long long int)((LPC_TIM1->TC+4294967296*timeNum-offset)/96000000);
+      tv->tv_usec=(unsigned long long int)((LPC_TIM1->TC+4294967296*timeNum-offset)/96000);
+}
+
+
+unsigned long long int atoi1(char *str){
+unsigned long long int result=0;
+for(int i =0;str[i]!=NULL;i++){
+int temp = str[i]-'0';
+result=result*10+temp;
+}
+return result;
+}
\ No newline at end of file

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Sat Dec 04 06:53:45 2010 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed/builds/e2ac27c8e93e