RE: Interrupt latency in RTEMS (Zedboard)

2018-03-27 Thread Rehab Massoud
t;BRIARD Sebastien" < sebastien.bri...@thalesaleniaspace.com> wrote: > Good point. Thanks. > > Would you have any idea concerning my other question ? (why I get the same > result for interrupt latency with different values of Tick per microsecond ) > > > > *De :* Rehab Massoud [mail

RE: Interrupt latency in RTEMS (Zedboard)

2018-03-27 Thread Rehab Massoud
13:52, "BRIARD Sebastien" < sebastien.bri...@thalesaleniaspace.com> wrote: > Yeah, hardware limits to 1.5ns if we take in account the max frequency of > the cortex. (That was the more or less 1ns =) ) > > > > *De :* Rehab Massoud [mailto:rehab.mass...@gmail.com] >

Re: Interrupt latency in RTEMS (Zedboard)

2018-03-27 Thread Rehab Massoud
Hi, the smaller theoretical delay accuracy you can measure (without adding to an ASIC cascaded FF) is one clock cycle. I think the maximum frequency that could be achieved on zedboard is not more than 800 MHz, and the maximum Zync's Cortex freq per Zedboard's datasheet is 667 MHz, which means you c

Re: RSB fails to build QEMU

2018-01-21 Thread Rehab Massoud
Hi Stephan, I think simply your problem is at the end of the attached file: " ERROR: glib-2.22 gthread-2.0 is required to compile QEMU. " You just need to install the library as it's named in your Linux distribution. Probably when you pass this also, another library could be missing and you will

MIPS with Qemu

2018-01-02 Thread Rehab Massoud
Hi all, as in https://devel.rtems.org/wiki/TBR/UserManual/Simulators Qemu mips/malta - is said to work with -M malta option. But when I tried different variants of qemu-mips, I get either a segmentation fault, architecture does not exist or a non compatible image. Has anyone succeeded to run qemu-

Re: How to change RTEMS real time interrupt source to external pin of LEON UT699

2017-08-30 Thread Rehab Massoud
Hi, using an external pin to directly trigger an interrupt is a little bit tricky and you will probably need to do some signal conditioning according to the expected shape and nature of the input signal that would appear on the pin. Did you already consider all this? If not then this is where you