Jingyuan Dong / Mbed 2 deprecated Part1_sync_with_getTime_Slave

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main.cpp@0:ae7a710b93e5, 2010-12-04 (annotated)

Committer:
guruimage
Date:
Sat Dec 04 06:53:45 2010 +0000
Revision:
0:ae7a710b93e5
HW3B getTime with Synchronization in Slave

Who changed what in which revision?

UserRevisionLine numberNew contents of line
guruimage 0:ae7a710b93e5 1 #include "mbed.h"
guruimage 0:ae7a710b93e5 2
guruimage 0:ae7a710b93e5 3
guruimage 0:ae7a710b93e5 4 struct timeval
guruimage 0:ae7a710b93e5 5 {
guruimage 0:ae7a710b93e5 6 unsigned long long int tv_sec; /* Seconds. */
guruimage 0:ae7a710b93e5 7 unsigned long long int tv_usec; /* Microseconds. */
guruimage 0:ae7a710b93e5 8 };
guruimage 0:ae7a710b93e5 9 void sync(void);
guruimage 0:ae7a710b93e5 10 void getValue(void);
guruimage 0:ae7a710b93e5 11 void readTime(void);
guruimage 0:ae7a710b93e5 12 void SetupTimer1(void);
guruimage 0:ae7a710b93e5 13 void SetupTimer0(void);
guruimage 0:ae7a710b93e5 14 void Timer1_IRQHandler(void);
guruimage 0:ae7a710b93e5 15 void Timer0_IRQHandler(void);
guruimage 0:ae7a710b93e5 16 unsigned long long int atoi1(char *str);
guruimage 0:ae7a710b93e5 17 void getTime(struct timeval *tv);
guruimage 0:ae7a710b93e5 18 Serial device(p9, p10);
guruimage 0:ae7a710b93e5 19 Serial pc(USBTX, USBRX);
guruimage 0:ae7a710b93e5 20 DigitalOut myled1(LED1);
guruimage 0:ae7a710b93e5 21 DigitalOut myled2(LED2);
guruimage 0:ae7a710b93e5 22 DigitalOut myled3(LED3);
guruimage 0:ae7a710b93e5 23 char* store=new char;
guruimage 0:ae7a710b93e5 24 int i=0;
guruimage 0:ae7a710b93e5 25 int k=0;
guruimage 0:ae7a710b93e5 26 int timeNum=0;
guruimage 0:ae7a710b93e5 27 unsigned long long int t1=0;
guruimage 0:ae7a710b93e5 28 unsigned long long int t2=0;
guruimage 0:ae7a710b93e5 29 unsigned long long int t3=0;
guruimage 0:ae7a710b93e5 30 unsigned long long int t4=0;
guruimage 0:ae7a710b93e5 31 long long int t11=0;
guruimage 0:ae7a710b93e5 32 long long int t22=0;
guruimage 0:ae7a710b93e5 33 long long int t33=0;
guruimage 0:ae7a710b93e5 34 long long int t44=0;
guruimage 0:ae7a710b93e5 35 long long int offset;
guruimage 0:ae7a710b93e5 36 char buffRx[100];
guruimage 0:ae7a710b93e5 37 int handleTrue = 0;
guruimage 0:ae7a710b93e5 38
guruimage 0:ae7a710b93e5 39
guruimage 0:ae7a710b93e5 40 int main() {
guruimage 0:ae7a710b93e5 41 wait(0.001);
guruimage 0:ae7a710b93e5 42 for(int i =0;i<100;i++){
guruimage 0:ae7a710b93e5 43 buffRx[i]=NULL;
guruimage 0:ae7a710b93e5 44 }
guruimage 0:ae7a710b93e5 45 timeval *currentTime = new timeval;
guruimage 0:ae7a710b93e5 46
guruimage 0:ae7a710b93e5 47 SetupTimer1();
guruimage 0:ae7a710b93e5 48
guruimage 0:ae7a710b93e5 49 pc.printf("out of the loop!");
guruimage 0:ae7a710b93e5 50 while(1){
guruimage 0:ae7a710b93e5 51 wait(1);
guruimage 0:ae7a710b93e5 52 sync();
guruimage 0:ae7a710b93e5 53 }
guruimage 0:ae7a710b93e5 54 }
guruimage 0:ae7a710b93e5 55
guruimage 0:ae7a710b93e5 56 void sync(void){
guruimage 0:ae7a710b93e5 57 char temp1[40];
guruimage 0:ae7a710b93e5 58 char temp2[40];
guruimage 0:ae7a710b93e5 59 int numcount=0;
guruimage 0:ae7a710b93e5 60
guruimage 0:ae7a710b93e5 61 t1=(unsigned long long int)(LPC_TIM1->TC+4294967296*timeNum);
guruimage 0:ae7a710b93e5 62 device.putc('s');// send s to initialize synchronization.
guruimage 0:ae7a710b93e5 63 device.attach(&getValue);
guruimage 0:ae7a710b93e5 64 if(handleTrue == 1){
guruimage 0:ae7a710b93e5 65 myled1=!myled1;
guruimage 0:ae7a710b93e5 66 handleTrue = 0;
guruimage 0:ae7a710b93e5 67 k=0;
guruimage 0:ae7a710b93e5 68 if(buffRx[0] == 'd'){
guruimage 0:ae7a710b93e5 69 t4=(unsigned long long int)(LPC_TIM1->TC+4294967296*timeNum);
guruimage 0:ae7a710b93e5 70 myled2=!myled2;
guruimage 0:ae7a710b93e5 71
guruimage 0:ae7a710b93e5 72 }
guruimage 0:ae7a710b93e5 73 for(int i=0; i<40;i++){
guruimage 0:ae7a710b93e5 74 temp1[i]=NULL;
guruimage 0:ae7a710b93e5 75 temp2[i]=NULL;
guruimage 0:ae7a710b93e5 76 }
guruimage 0:ae7a710b93e5 77 if(buffRx[1] == 'm'){
guruimage 0:ae7a710b93e5 78 for(int i=2;buffRx[i]!='f';i++){
guruimage 0:ae7a710b93e5 79 temp1[i-2]=buffRx[i];
guruimage 0:ae7a710b93e5 80 numcount = i;
guruimage 0:ae7a710b93e5 81 }
guruimage 0:ae7a710b93e5 82 t2=atoi1(temp1);
guruimage 0:ae7a710b93e5 83 for(int i=0; i<40;i++){
guruimage 0:ae7a710b93e5 84 temp1[i]=NULL;
guruimage 0:ae7a710b93e5 85 }
guruimage 0:ae7a710b93e5 86
guruimage 0:ae7a710b93e5 87 for(int i=numcount+2;buffRx[i]!='n';i++){
guruimage 0:ae7a710b93e5 88 temp2[i-numcount-2]=buffRx[i];
guruimage 0:ae7a710b93e5 89 }
guruimage 0:ae7a710b93e5 90 numcount=0;
guruimage 0:ae7a710b93e5 91 t3=atoi1(temp2);
guruimage 0:ae7a710b93e5 92
guruimage 0:ae7a710b93e5 93 for(int i=0; i<40;i++){
guruimage 0:ae7a710b93e5 94 temp2[i]=NULL;
guruimage 0:ae7a710b93e5 95 }
guruimage 0:ae7a710b93e5 96
guruimage 0:ae7a710b93e5 97 t11=(long long int)t1;
guruimage 0:ae7a710b93e5 98 t22=(long long int)t2;
guruimage 0:ae7a710b93e5 99 t33=(long long int)t3;
guruimage 0:ae7a710b93e5 100 t44=(long long int)t4;
guruimage 0:ae7a710b93e5 101 offset = (long long int)(((t22-t11)-(t44-t33))/2);
guruimage 0:ae7a710b93e5 102 //LPC_TIM1->TC=LPC_TIM1->TC-offset;
guruimage 0:ae7a710b93e5 103 for(int i=0;buffRx[i]!=NULL;i++){
guruimage 0:ae7a710b93e5 104 buffRx[i]=NULL;
guruimage 0:ae7a710b93e5 105 }
guruimage 0:ae7a710b93e5 106 //pc.printf("\r\nOffset is %llu!\r\n",offset);
guruimage 0:ae7a710b93e5 107 }
guruimage 0:ae7a710b93e5 108 }
guruimage 0:ae7a710b93e5 109 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);
guruimage 0:ae7a710b93e5 110
guruimage 0:ae7a710b93e5 111 }
guruimage 0:ae7a710b93e5 112
guruimage 0:ae7a710b93e5 113 void getValue(void){
guruimage 0:ae7a710b93e5 114 buffRx[k]=device.getc();
guruimage 0:ae7a710b93e5 115 //pc.printf("%c",buffRx[k]);
guruimage 0:ae7a710b93e5 116 if(buffRx[k]=='n'){
guruimage 0:ae7a710b93e5 117 handleTrue = 1;
guruimage 0:ae7a710b93e5 118 }
guruimage 0:ae7a710b93e5 119 k++;
guruimage 0:ae7a710b93e5 120 }
guruimage 0:ae7a710b93e5 121
guruimage 0:ae7a710b93e5 122 void SetupTimer1(void)
guruimage 0:ae7a710b93e5 123 {
guruimage 0:ae7a710b93e5 124 LPC_SC->PCONP |= 1 << 2; // Power on Timer`
guruimage 0:ae7a710b93e5 125 LPC_SC->PCLKSEL0 |= 1 << 4;
guruimage 0:ae7a710b93e5 126 LPC_TIM1->TCR = 0x2; // Reset and set to timer mode
guruimage 0:ae7a710b93e5 127 LPC_TIM1->CTCR = 0x0;
guruimage 0:ae7a710b93e5 128 LPC_TIM1->PR = 0; // No prescale
guruimage 0:ae7a710b93e5 129 LPC_TIM1->MR0 = 0xFFFFFFFF; // Match count for 100mS
guruimage 0:ae7a710b93e5 130 LPC_TIM1->MCR = 3; // Interrupt and Reset on Match
guruimage 0:ae7a710b93e5 131 LPC_TIM1->TCR = 1; // Enable Timer
guruimage 0:ae7a710b93e5 132
guruimage 0:ae7a710b93e5 133 // Enable the ISR vector
guruimage 0:ae7a710b93e5 134 NVIC_SetVector (TIMER1_IRQn, (uint32_t)&Timer1_IRQHandler);
guruimage 0:ae7a710b93e5 135 NVIC_EnableIRQ(TIMER1_IRQn);
guruimage 0:ae7a710b93e5 136 }
guruimage 0:ae7a710b93e5 137 void Timer1_IRQHandler(void)
guruimage 0:ae7a710b93e5 138 {
guruimage 0:ae7a710b93e5 139 timeNum++;
guruimage 0:ae7a710b93e5 140 LPC_TIM1->IR = 1;
guruimage 0:ae7a710b93e5 141 }
guruimage 0:ae7a710b93e5 142
guruimage 0:ae7a710b93e5 143 void getTime(struct timeval *tv) {
guruimage 0:ae7a710b93e5 144 tv->tv_sec=(unsigned long long int)((LPC_TIM1->TC+4294967296*timeNum-offset)/96000000);
guruimage 0:ae7a710b93e5 145 tv->tv_usec=(unsigned long long int)((LPC_TIM1->TC+4294967296*timeNum-offset)/96000);
guruimage 0:ae7a710b93e5 146 }
guruimage 0:ae7a710b93e5 147
guruimage 0:ae7a710b93e5 148
guruimage 0:ae7a710b93e5 149 unsigned long long int atoi1(char *str){
guruimage 0:ae7a710b93e5 150 unsigned long long int result=0;
guruimage 0:ae7a710b93e5 151 for(int i =0;str[i]!=NULL;i++){
guruimage 0:ae7a710b93e5 152 int temp = str[i]-'0';
guruimage 0:ae7a710b93e5 153 result=result*10+temp;
guruimage 0:ae7a710b93e5 154 }
guruimage 0:ae7a710b93e5 155 return result;
guruimage 0:ae7a710b93e5 156 }