I'm trying to use the DMTimer pins (gpio2[2...5]) to measure pulse width using the 25MHz clock. I've successfully tested the software using a button connected to the 3.3v rail. The pinmux is set to mode 2 forcthose pins and pull up/down are disabled. The timers are set up in capture mode with interrupts enabled on the edge transitions. Using the button the interrupts occur and the time between the edges is derived from the captured timer values.
However, when I connect a signal generator outputting a 3.3v amplitude square wave at 50Hz to a timer pin, no interrupts occur. Looking on a 'scope at the input to the timer pin the pulse train amplitude has dropped to about 1 volt. Can anyone suggest possible cause for this drop in amplitude? Thanks for any suggestions. Bob Stewart -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
