* Ladislav Michl <ladis@xxxxxxxxxxxxxx> [180108 22:09]: > On Mon, Jan 08, 2018 at 01:59:31PM -0800, Tony Lindgren wrote: > > * Ladislav Michl <ladis@xxxxxxxxxxxxxx> [180108 15:46]: > > > Here it seems hardware can capture both edges, but I do not see a way > > > how to tell it I want start from either low to high or high to low > > > transition. Clues? > > > > At least dm3730 TRM documents TCM bits [9:8] for TCLR, but you > > probably know that already.. > > > > If you're having hard time getting things starting, maybe something > > like this helps: > > > > stop timer in TCLR register > > configure timer in TCLR > > write some value to TLDR, maybe 0? > > set ST bit in TCLR to start > > Let me clarify it a bit more. I have no problem starting timer and capture > events. I just didn't find a way how to tell hardware I want to start > with for example rising edge, so rising edge goes to TCAR1 and failing edge > to TCAR2. Substracting those gives pulse width. Oh I see, yeah that would be cool :) Maybe you can first configure an interrupt to trigger on rising edge, then configure things for falling edge, then subtract.. Regards, Tony -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
