embedded powerpc in VirtexII-pro

[Terrence Mak]

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;
}

}

 

[Frank van Eijkelenburg]

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

Frank

"Terrence Mak" <stmak@se.cuhk.edu.hk> wrote in message
news:c1u8a3$24vn$2@justice.itsc.cuhk.edu.hk...

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;
}

}

 

[Larry McKeogh]

Hello Terrece,
Try the following:

#include <stdio.h>
#include <math.h>
#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:

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;
}

}