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utime: Revert back the ticks_xxx functions to use short ints. 8000 #235
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Side effects on the Lora fucntions have to be tested yet, because LOra uses ticks_cpu() and may use simple difference for timeouts.
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This was referenced Jan 5, 2019
peter-pycom
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The place at which the time for the next transition is noticed moves from the start of the respective block to it's end, when the RGB led has switched. Co-authored-by: robert-hh <robert@hammelrath.com>
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The place at which the time for the next transition is noticed moves from the start of the respective block to it's end, when the RGB led has switched. Co-authored-by: robert-hh <robert@hammelrath.com>
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The ticks_xx functions wrap around at a certain value. For the initial micropython, this values is 2^30-1 (MP short int). For the pycom port, it is 2^32-1. Thats done by simply using C 32 bit integers. This implementation has two drawbacks:
to deal with. That may hurt if for instance ticks_diff and ticks_xx are used a tight timing loop.
So this PR just goes back to the initial code, with was still present in the codebase and just had to be enabled with a config flag in mpconfigport.h.
Only ticks_cpu() is kept, limited to a 2^30 period, since different from the mp.org version is counts us ticks and the timing call is also used by the SX1272 and SX1276 driver. Side effects on the Lora nanogateway have to be tested yet, but I am pretty confident that it works. The ticks_cpu() call itself behaves well with ticks_diff().