I noticed that you wrote %.2 for the format of the number. The period (".") doesn't make sense in a format string for integer variables. Does it crash if you change the format string to only "%" or "%2" PRIu32? On Apr 7, 2016 4:29 PM, "Theodore Kotsonis" <kotso...@aueb.gr> wrote:
> Hi everyone > > I am trying to use xtimer method. I want to calculate how much miliseconds > do my function. > Is there any xtimer counter to use? > > I tried to use uint43 xtimer_now before and after the method but when I do > the subtraction I get the result but then I get an error on my board > Below is my code > > first_wakeup = xtimer_now(); > printf("%" PRIu32 "\n", first_wakeup); > /*my method*/ > last_wakeup = xtimer_now(); > final_result = last_wakeup - > printf("%.2" PRIu32 "\n", last_wakeup - first_wakeup); > > and this is the error > > 2016-04-07 14:06:16,042 - INFO # Context before hardfault: > 2016-04-07 14:06:16,043 - INFO # r0: 0x00000000 > 2016-04-07 14:06:16,048 - INFO # r1: 0xf134b7e4 > 2016-04-07 14:06:16,048 - INFO # r2: 0x00000328 > 2016-04-07 14:06:16,054 - INFO # r3: 0x2000018c > 2016-04-07 14:06:16,055 - INFO # r12: 0x00000000 > 2016-04-07 14:06:16,055 - INFO # lr: 0x08000fd3 > 2016-04-07 14:06:16,055 - INFO # pc: 0x08000fe4 > 2016-04-07 14:06:16,055 - INFO # psr: 0x21000021 > 2016-04-07 14:06:16,056 - INFO # > 2016-04-07 14:06:16,056 - INFO # FSR/FAR: > 2016-04-07 14:06:16,060 - INFO # CFSR: 0x00008200 > 2016-04-07 14:06:16,060 - INFO # HFSR: 0x40000000 > 2016-04-07 14:06:16,061 - INFO # DFSR: 0x00000008 > 2016-04-07 14:06:16,061 - INFO # AFSR: 0x00000000 > 2016-04-07 14:06:16,066 - INFO # BFAR: 0xf134b7e4 > 2016-04-07 14:06:16,066 - INFO # Misc > 2016-04-07 14:06:16,066 - INFO # EXC_RET: 0xfffffff1 > 2016-04-07 14:06:16,078 - INFO # Attempting to reconstruct state for > debugging... > 2016-04-07 14:06:16,078 - INFO # In GDB: > 2016-04-07 14:06:16,078 - INFO # set $pc=0x8000fe4 > 2016-04-07 14:06:16,079 - INFO # frame 0 > 2016-04-07 14:06:16,079 - INFO # bt > 2016-04-07 14:06:16,079 - INFO # > 2016-04-07 14:06:16,079 - INFO # ISR stack overflowed by at least 48 bytes. > > When I remove this line ( printf("%.2" PRIu32 "\n", last_wakeup - > first_wakeup); ) > my program run without an error > > > All the best > Theodore > > > _______________________________________________ > devel mailing list > devel@riot-os.org > https://lists.riot-os.org/mailman/listinfo/devel >
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