mbed-os

Commit Graph

Author	SHA1	Message	Date
Kevin Bracey	57310729d4	wait_us optimization As the timer code became more generic, coping with initialization on demand, and variable width and speed us_ticker_api implementations, wait_us has gradually gotten slower and slower. Some platforms have reportedly seen overhead of wait_us() increase from 10µs to 30µs. These changes should fully reverse that drop, and even make it better than ever. Add fast paths for platforms that provide compile-time information about us_ticker. Speed and code size is improved further if: * Timer has >= 2^32 microsecond range, or better still is 32-bit 1MHz. * Platform implements us_ticker_read() as a macro * Timer is initialised at boot, rather than first use The latter initialisation option is the default for STM, as this has always been the case.	2019-06-14 10:22:08 +03:00
Martin Kojtal	e52bb68f93	tests: astyle fix All tests should comply to our coding standard now	2018-08-03 10:23:38 +01:00
Przemyslaw Stekiel	c32ccf69b1	Add tests for ticker HAL API.	2018-05-25 12:04:32 -05:00

Author

SHA1

Message

Date

Kevin Bracey

57310729d4

wait_us optimization

As the timer code became more generic, coping with initialization on
demand, and variable width and speed us_ticker_api implementations,
wait_us has gradually gotten slower and slower.

Some platforms have reportedly seen overhead of wait_us() increase from
10µs to 30µs. These changes should fully reverse that drop, and even
make it better than ever.

Add fast paths for platforms that provide compile-time information about
us_ticker. Speed and code size is improved further if:

* Timer has >= 2^32 microsecond range, or better still is 32-bit 1MHz.
* Platform implements us_ticker_read() as a macro
* Timer is initialised at boot, rather than first use

The latter initialisation option is the default for STM, as this has
always been the case.

2019-06-14 10:22:08 +03:00

Martin Kojtal

e52bb68f93

tests: astyle fix

All tests should comply to our coding standard now

2018-08-03 10:23:38 +01:00

Przemyslaw Stekiel

c32ccf69b1

Add tests for ticker HAL API.

2018-05-25 12:04:32 -05:00

3 Commits (e74fbcd79ebaf7f2891a93669ff74b79b04e4b99)