yuwen sun / Mbed 2 deprecated Hw3B_Final_SNE_Master

Dependencies:   mbed

main.cpp@0:9456245a7755, 2010-12-03 (annotated)

Committer:
sun831011
Date:
Fri Dec 03 22:49:17 2010 +0000
Revision:
0:9456245a7755

        

        
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#include "mbed.h"





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Serial pc(USBTX, USBRX); // tx, rx





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Serial ss(p9, p10); //tx rx





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Serial ss_sne(p13, p14); //tx rx





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DigitalOut myled1(LED1);





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DigitalOut myled2(LED2);





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DigitalOut masterOut(p23);





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InterruptIn masterIn(p22);





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InterruptIn slaveIn(p21);





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unsigned long counter = 0;





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int divider = 1;





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int pro_flag = 0;  





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int task_flag = 0;





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unsigned long long t1, t2, t3, t4;





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typedef struct timeval {





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    unsigned long tv_sec;





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    unsigned long tv_usec;





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} timeval;





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void Timer0_init(void);





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void Timer0_IRQHandler(void);





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void Sync_protocol(void);





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void getTime(struct timeval *tv);





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int runAtTime (void (*fptr)(void), struct timeval tv);





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void toggle(void);





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void runAtTrigger( );





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void reportToggle(struct timeval *tv);





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long long sne(void);





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int main( )





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{   





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    struct timeval t_run;





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    long long t_run_m;





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    t_run.tv_sec = 1000;





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    t_run.tv_usec = 0;





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    wait(1);





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//    masterIn.rise(&runAtTrigger);





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//    masterIn.fall(&runAtTrigger);





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    slaveIn.rise(&runAtTrigger);





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    slaveIn.fall(&runAtTrigger);





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    Timer0_init( );





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    while (1)





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    {   





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        if (pc.readable( )){





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            t_run_m = sne( );





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            t_run.tv_sec = t_run_m/1000000;





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            t_run.tv_usec = t_run_m%1000000;





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            pc.printf("%lu\n",t_run.tv_sec);





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            pc.printf("%lu\n",t_run.tv_usec);





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        }    





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        if (!task_flag)





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            task_flag = runAtTime (&toggle, t_run);





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        if (pro_flag == 1){





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            Sync_protocol( );





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            pro_flag = 0;





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        }   





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    }





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}





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void Timer0_init(void)





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{





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    LPC_SC->PCLKSEL0 = 0x0066;





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    LPC_SC->PCONP |= 1<<1; // Timer0 Power On





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    LPC_TIM0->MR0 = 2880000000;  // Match count for 30S





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    LPC_TIM0->MCR = 3;     // Interrupt and Reset on Match





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    LPC_TIM0->TCR = 1;     // Enable Timer0  





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    NVIC_SetVector (TIMER0_IRQn, (uint32_t)&Timer0_IRQHandler);





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    NVIC_EnableIRQ(TIMER0_IRQn);





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}





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void Timer0_IRQHandler(void)





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{





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    LPC_TIM0->IR = 1;





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    LPC_TIM0->MR0 = 2880000000;  // Match count for 30S





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    LPC_TIM0->TCR = 1;     // Enable Timer0





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    counter = counter + 1;





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    if ( counter % divider ==0 )





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        pro_flag = 1;





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}





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void Sync_protocol(void)





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{   





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    char x;





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    t1 = counter * 4294967296 + LPC_TIM0->TC;





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    ss.putc('S');





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    pc.printf("t1 = %llu\n", t1);





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    ss.printf("%llu", t1);





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    ss.putc('E');





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    while (1){





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        if (ss.readable( )){





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            x = ss.getc( );





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            t4 = counter * 4294967296 + LPC_TIM0->TC;





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            ss.printf("%llu", t4);





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            ss.putc('E');





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            pc.printf("%c\n", x);





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            pc.printf("t4 = %llu\n", t4);





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            break;





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        }





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    }    





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}





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void getTime(struct timeval *tv){





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    unsigned long ns, hs;





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    ns = LPC_TIM0->TC;





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    hs = counter;





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    tv->tv_sec = hs*30 + ns/100000000;





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    tv->tv_usec = (ns%100000000)/100;





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}





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int runAtTime (void (*fptr)(void), struct timeval tv){





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      struct timeval current_t;





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      getTime(&current_t);





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      if (tv.tv_sec <= current_t.tv_sec && tv.tv_usec <= current_t.tv_usec){





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          (*fptr) ( );





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          return 1;





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      }





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      else 





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          return 0;  





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}





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void toggle(void){





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    masterOut = !masterOut;





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}





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void runAtTrigger(void){





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   struct timeval response_t;





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   reportToggle(&response_t);  





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}





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void reportToggle(struct timeval *tv)





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{





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    getTime(tv);





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    pc.printf("%u\n", tv->tv_sec);





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    pc.printf("%u\n", tv->tv_usec);





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    myled2 = !myled2;   





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}





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long long sne( ){





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    char temp;





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    char incode[100];





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    int i=0;





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    int j=0;





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    long long sum = 0;





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    while ((temp = pc.getc())!= 'E') {    //getchar





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        incode[i] = temp;    //put the original char in incode      





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        i++;





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    } 





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    for (j=1;j<i;j++){





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        sum = (incode[j]-'0')+sum*10;





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    }





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    if (incode[0]=='S'){





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        ss_sne.printf("%llu", sum);





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        ss_sne.putc('E');





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        return sum;





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    }





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    else





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        return 0;





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}