sys/phydat: add functions for Unix time conversion to phydat #19080
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silkeh
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Area: sys
sys/include/phydat.h
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| int64_t phydat_unix(int16_t year, int16_t month, int16_t day, | ||
| int16_t hour, int16_t minute, int16_t second, | ||
| int32_t offset); |
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Isn't this just a re-implementation of mktime()?
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Yes, with a few differences:
- The time offset is explicit instead of implicit.
- It does not have a DST flag.
- It uses
int64_tinstead oftime_t(int) to avoid Y2K38.
I couldn't find any 64-bit mktime implementation available in RIOT-OS, but please let me know if there is one.
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It uses
int64_tinstead oftime_t(int) to avoid Y2K38.
Are you sure time_t is only 32 bit? For
printf("time_t is %u bit\n", sizeof(time_t) * 8);I get
time_t is 64 bit
on both newlib and picolibc.
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Are you sure time_t is only 32 bit?
No, this depends on the platform. The ARM-based boards I tested use 64-bit time. ESP32, ATmega328 and native, however, give me time_t is 32 bit.
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tests/phydat_unix/Makefile.ci
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| @@ -0,0 +1 @@ | |||
| BOARD_INSUFFICIENT_MEMORY := | |||
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You can create this list by running
make create-Makefile.ci
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Is there documentation for this somewhere? It didn't work for me in the form you suggested (I had to add a BOARD=) or using BUILD_IN_DOCKER=1. It seemed to work by manually running things in the Docker image, however, so I hope it's correct.
Add functionality for calculating Unix timestamps to phydat. This allows one to convert dates received from RTCs and the like to Unix timestamps.
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Contribution description
Add functionality for calculating Unix timestamps to phydat. This allows one to convert dates received from RTCs and the like to Unix timestamps.
This was originally included in #16384, in which it was decided to move it to a separate PR. See the discussion here.
Testing procedure
Tests are included.
Issues/PRs references
None.