Actions
Forum Thread Details
  • State Not Answered
  • Replies 2 replies
  • Subscribers 267 subscribers
  • Views 297 views
  • Users 0 members are here
Related

xil_printf and interrupt problem

Former Member

Hi Experts,
I design a simple hardware to copy a BRAM buffer from PL unit of my zedboard to internal memory .
when BRAM buffer is filled an interrupt occurs and my Interrupt service routine copies data from BRAM to internal memory.
But when I use xil_printf to show buffer contents onscreen, I find that my interrupt routine does not called anymore  and pends until xil_printf function calls finishes.

Does xil_printf pends interrupt?
Regards
Mehrdad,

  • 0

    Hi mehrdad_58,

    Hmmm, that is a rather strange behavior.  How is it that you know for sure that your interrupt routine is no longer being called until xil_printf() completes?

    If you take a look at ps7_cortexa9_0libsrcstandalone_v3_09_asrcxil_printf.c is making repeated calls to XUartPs_IsTransmitFull() which is found in the ps7_cortexa9_0libsrcstandalone_v3_09_asrcxuartps_hw.h file.  That printf() code does not appear to be tampering with interrupts at all.  Are you sure that your ISR is being called asynchronously as an interrupt handler?

    Regards,

    -Kevin

  • 0 in reply to zedhed

    Dear Kevin,
    Thanks for the answer,
    I find what was the problem.
    In interrupt routines which are generated from PL to PS, routine is supposed to clear the pend bit of generated interrupt by writing 1 to dedicated bit position of interrupt pend register.

    I also should mention that I use Xcugic routines to handle interrupt and my interrupt line is connected to F2P pins of zynq processor.
    Anyway thanks for the answer.