6 Commits (65b79502020d0d364cc90b32c86b254b53ba6cd9)

Author	SHA1	Message	Date
Martin Kojtal	4e0d07d50f	Merge pull request #12897 from kjbracey-arm/tickeropt ... Optimise mbed_ticker_api.c	2020-11-30 16:15:37 +00:00
rogeryou	48524f25ae	add opsi driver	2020-09-16 11:27:23 +08:00
Kevin Bracey	65bc41a96b	Optimise mbed_ticker_api.c ... The generic code in mbed_ticker_api.c uses run-time polymorphism to handle different tickers, and has generic run-time calculations for different ticker widths and frequencies, with a single special-case for 1MHz. Extend the run-time special casing to handle any conversion cases where either the multiply or divide can be done as a shift. This is a speed optimisation for certain platforms. Add a new option `target.custom-tickers`. If turned off, it promises that only USTICKER and LPTICKER devices will be used. This then permits elimination and/or simplification of runtime calculations, saving size and speed. If either both USTICKER and LPTICKER have the same width, or same period numerator or denominator, or only one of them exists, then operations can be hard-coded. This is a significant ROM space saving, and a minor speed and RAM saving. We get to optimise all the calculations, but the run-time polymorphism is retained even if there is only one ticker, as it doesn't significantly affect code size versus direct calls, and the existence of lp_ticker_wrapper and various us_ticker optimisations requires it, even if only LPTICKER is available.	2020-09-14 13:25:10 +03:00
Kevin Bracey	6423633122	Add documentation for LP_TICKER defines ... They're now potentially useful, so document them as per the US_TICKER defines.	2020-09-14 13:25:08 +03:00
talorion	e55421aaa4	pwmout - add read methods for period and pulsewidth	2020-09-02 13:39:08 +02:00
Rajkumar Kanagaraj	993ed3b975	Refactor hal directory	2020-08-25 14:57:07 +01:00