embedded powerpc in VirtexII-pro

- T
- Terrence Mak
  
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posted
20 years ago

Mon, Mar 1, 2004 2:48 AM

Hi,

I am new in using the embeded device (VirtexII-Pro) to implement an algorithm. As I want to count the cpu time of the algorithm , I use the XTime_GetTime(starttime) in the the xtime_l.h library. Also I need to print out the result to a uart by using xil_printf. But the result did not displayed successfully. Please find the program as follows.

Is there any step missed?

Many thanks, Terrence

#include "xgpio.h" #include "xparameters.h" #include "math.h" #include "xtime_l.h"

main() { XGpio gpio_reset, gpio_addr, gpio_data; int i,j=0, count=0,k, site=0; double likelihood[12], probability=0.0, lnL=0.0; XTime *starttime, *endtime; char *output;

xil_printf("start\n"); XTime_GetTime(starttime);

// Start computation

...

//End computation

XTime_GetTime(endtime);

//convert the long long to a string sprintf(output, "%llu", *endtime);

//print the result while(*output){ xil_printf("%c", *output); ++output; }

}

- F
- Frank van Eijkelenburg
  
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posted
20 years ago

Mon, Mar 1, 2004 8:05 AM

Is your "output" pointer pointing to a valid array of chars (in this code it's pointing to somewhere in the memory).

Frank

- L
- Larry McKeogh
  
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posted
20 years ago

Tue, Mar 2, 2004 3:38 PM

Hello Terrece, Try the following:

#include #include #include "xgpio.h" #include "xparameters.h" #include "xtmrctr.h"

#define TIMER_COUNTER_0 0

main(){ int start, end; XTmrCtr timer;

// Initialize the External Timer // XPAR_Timer_DEVICE_ID value below is found in Xparameters.h // for my design it was #define XPAR_OPB_TIMER_1_DEVICE_ID 0 XTmrCtr_Initialize(&timer, XPAR_Timer_DEVICE_ID);

XTmrCtr_Reset(&timer, TIMER_COUNTER_0); start = XTmrCtr_GetValue(&timer, TIMER_COUNTER_0);

// Start timer XTmrCtr_Start(&timer, TIMER_COUNTER_0);

// Start computation

...

//End computation

// Stop timer XTmrCtr_Stop(&timer, TIMER_COUNTER_0); end = XTmrCtr_GetValue(&timer, TIMER_COUNTER_0);

// Print out value to stdio (RS-232) xil_printf("Timer Start value = %d Timer end value = %d \n\r", start, end);

Regards, Larry

Terrence Mak wrote: