Hello,
I am trying to connect the onboard rtc of the LPC55S69 to the time.h functions in newlib:
I have tried defining my own _gettimeofday() function based on this forum post as follows:
#include "LPC55S69_cm33_core0.h"
#include "fsl_common.h"
#include "fsl_rtc.h"
#include <time.h>
#include <reent.h>
#include "assert.h"
int _gettimeofday_r(struct _reent *pReent, struct timeval *tp, void *tzvp)
{
assert(pReent != NULL);
assert(tp != NULL);
if (tp)
{
tp->tv_sec = RTC_GetSecondsTimerCount(RTC); // get the seconds from a clock source
tp->tv_usec = 0; // get the microsconds from a clock source
}
return 0;
}
int _gettimeofday(struct timeval *tp, void *tzvp)
{
return _gettimeofday_r(_impure_ptr, tp, tzvp);
}
However it seems to create the following error(s):
Description Resource Path Location Type
c:/nxp/mcuxpressoide_11.7.1_9221/ide/plugins/com.nxp.mcuxpresso.tools.win32_11.7.1.202301190959/tools/bin/../lib/gcc/arm-none-eabi/10.3.1/../../../../arm-none-eabi/lib/thumb/v8-m.main+fp/hard\libcr_newlib_semihost.a(syscalls.o): in function `_gettimeofday': firmware C/C++ Problem
Description Resource Path Location Type
first defined here firmware line 59 C/C++ Problem
Description Resource Path Location Type
make: *** [makefile:115: all] Error 2 firmware C/C++ Problem
Description Resource Path Location Type
make[1]: *** [makefile:124: firmware.axf] Error 1 firmware C/C++ Problem
Description Resource Path Location Type
make[1]: Target 'main-build' not remade because of errors. firmware C/C++ Problem
Is this not the correct way to define this function?
