Log time in milliseconds

[ahmedadelfarid]

I am on measuring the intervals by which some interrupt occurs.

I want to log the time at which the interrupt occurs. It may by less than 1 ms.

What I could do, is to use the function "TimeStr()" but ius resolution is in seconds, so what I could get is something like that:

[12:25:10]
[12:25:10]
[12:25:11]
[12:25:11]
[12:25:11]
[12:25:11]
[12:25:11]
[12:25:11]
[12:25:11]
[12:25:11]
[12:25:11]
[12:25:11]
[12:25:11]
[12:25:11]
[12:25:11]
[12:25:11]
[12:25:11]
[12:25:11]
[12:25:11]
[12:25:12]
[12:25:12]

I want to measure these times in less than milliseconds.

Thanks

[LuisG]

If you use the FormatDateTimeString function, you should be able to display millisecond resolution. Here is some sample code:

#define DATETIME_FORMATSTRING "[%H:%M:%S.%f]"

double currDateTime;
int bufferLen;

char *dateTimeBuffer = NULL;
GetCurrentDateTime (&currDateTime);
bufferLen = FormatDateTimeString (currDateTime, DATETIME_FORMATSTRING, NULL, 0);
dateTimeBuffer = malloc (bufferLen + 1);
FormatDateTimeString (currDateTime, DATETIME_FORMATSTRING, dateTimeBuffer, bufferLen + 1 );

[GuenterMueller]

Windows provides a function called QueryPerformanceCounter. This provides excellent accuracy.

Regards, Guenter