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ChibiOS-Contrib/testhal/KINETIS/MCHCK/PWM
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flabbergast 7d99206f05 [KINETIS] PAL driver: implement PAL_LINE. 2016-05-08 09:09:43 +01:00
..
Makefile [KINETIS] Mass update Makefile (license & asm changes). 2016-04-24 17:12:49 +01:00
README.md [KINETIS] Add new testhal demos (KL27Z,Teensies,MCHCK). 2016-03-22 18:43:20 +00:00
chconf.h [KINETIS] Add new testhal demos (KL27Z,Teensies,MCHCK). 2016-03-22 18:43:20 +00:00
halconf.h [KINETIS] Add new testhal demos (KL27Z,Teensies,MCHCK). 2016-03-22 18:43:20 +00:00
main.c [KINETIS] PAL driver: implement PAL_LINE. 2016-05-08 09:09:43 +01:00
mcuconf.h [KINETIS] Add new testhal demos (KL27Z,Teensies,MCHCK). 2016-03-22 18:43:20 +00:00

README.md

"Soft" PWM demo

The PWM in this demo is "soft", meaning that it does use a hardware timer to run, but the output is not directly routed to a pin; a callback functions which turn a LED on and off are used instead.

Notes

The brightness percentages it goes only up to 9900 (99%) instead of 10000 (100%); otherwise there is a noticeable blink in the top of the cycle. The reason is that the on/off callback functions take too long to execute for this kind of (relatively fast) timer. Likewise, '0' (0%) in the cycle actually means that the LED doesn't get turned off, because the channel notification function that turns the LED off doesn't get called. So in a setup like this one, '1' should be the minimum; although it does mean that the LED is never fully off.