DaVinci™ Video Processors

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interrupts
Related Posts

  • Forum Post: Re: How do I access my Linux drivers (kernel space) from application level (user space)?

    SJackson
    Is there a standard method for a user space application to be notified when the kernel receives an interrupt from a device? For example, whenever a device external to the DaVinci communicates with it via UART or SPI, I would like my application to be notified so that it can handle the incoming message...
    on Jun 16, 2008

  • Forum Post: Re: Finding Interrupt Latency

    Bernie Thompson TI
    Based on the Wiki article regarding the interrupt latency checker you may want to try 'C64x+ CPU Cycle Accurate Simulator, Little Endian' instead, which brings in the 'simc64plus_cpu.cfg'. I have not had a chance to use this tool myself but hopefully the minor simulator configuration...
    on Aug 19, 2008

  • Forum Post: Re: Finding Interrupt Latency

    Bernie Thompson TI
    It looks like there is now an easier way to do this, in particular if you load C:\CCStudio_v3.3\cc\gel\interruptlatencydetector.gel it will give you GEL commands to start and stop the interrupt latency detector. The wiki page has been updated with this, and if you look inside that GEL file it provides...
    on Aug 21, 2008

  • Forum Post: VPBE Interrupt Content (dm6437)

    Elric
    Hi, I was tracing the interrupt code for dm6436 vpbe drivers, but now I am a little confused. At the end of each frame, an interrupt occurs and DDC_VPBEIsr function is executed. DDC_VPBEIsr is mainly in three parts, operations for interlaced mode, operations for progressive mode and callback operations...
    on Nov 5, 2008

  • Forum Post: Re: DVSDK PCI boot and reboot

    Loc
    What is the kind of situation that will cause a "driver reload" and how is the environment - i.e. DM648 register content cleared? Without knowing the exact conditions and operating environment, it is a bit hard to devise a scheme, so following is just an idea. It seems to me there are 3...
    on Jan 16, 2009

  • Forum Post: Re: how to manually map c64+ interrupt service routines

    Bernie Thompson TI
    Assuming you mean to operate without using BIOS to manage interrupts at all I would certainly advise against this, particularly in the DM6437 case, it is just so much easier to just let BIOS handle it and I am not sure if the software collateral is out there to easily do this with the DM6437, you may...
    on Apr 9, 2009

  • Forum Post: how to manually map c64+ interrupt service routines

    MattLipsey
    I know that DSP/BIOS has a handy interrupt dispatcher, but I was wondering how to manually map interrupt service routines (c or assembly) in the c64+ families. In SPRU732, it appears that there is an interrupt service table that could contain jump vectors or maybe even an entire ISR if it was small enough...
    on Apr 8, 2009

  • Forum Post: SEM_post in interrupt leading to context switch before interrupt exit

    AK12231
    Hello, I am using the DaVinci processor and there seems to be a bug in the semaphore implementation in the BIOS: I am calling SEM_post() in an interrupt. This is waking up a task that is pending on this semaphore even before the the interrupt exits. The interrupt is using the dispatcher. Thanks...
    on May 27, 2009

  • Forum Post: Re: Interrupts

    TimHarron
    Can you please provide more context surrounding this problem and the system in general? The only time an interrupt will not 'fire' is if the IER bit or the GIE is disabled. Even if the event is not mapped to one of the CPU interrupts the event still happens - it is just never captured by the...
    on Jun 5, 2009

  • Forum Post: Re: DM6467 external interrupts

    Brad Griffis
    FYI, I recently wrote the following articles related to GPIO which may also be of interest: http://tiexpressdsp.com/index.php?title=Configuring_GPIO_Interrupts http://tiexpressdsp.com/index.php?title=Avoiding_Double_Interrupts_with_the_GPIO_Peripheral http://wiki.davincidsp.com/index.php/Configuring_GPIO_EDMA_Events...
    on Jun 15, 2009

  • Forum Post: DM6467 external interrupts

    Nir Aloni
    From the DM6467 documentation, It is not very clear which GPIO pins can server as external interrupts sources. I am not sure if I understood correctly, but are GPIO0 through GPIO7 the possible external interrupt sources? are there any more? Thank you
    on Jun 15, 2009

  • Forum Post: Can't use intrinsics "_restore_interupts();"

    JeffChen
    HI: My target device is dm6437. The CGT version is 6.1.12 The compiler report as follow: undefined first referenced symbol in file --------- ---------------- __restore_interupts D:\\PROJECT\\xxxxxxx Please help me to solve this problemm, thanks.
    on Nov 5, 2009

  • Forum Post: DM648 QDMA Transfer Completion

    Daniel Nadeau
    I spent a long time trying to get the ACPY3 API working but never got it going so now I am using the QDMA by directly writing into the QDMA registers. I can get the transfers working just fine except for two related problems. I can only get the 0th bit in IPR to go high when a transfer completes. If...
    on Dec 30, 2009

  • Forum Post: Re: How do I access my Linux drivers (kernel space) from application level (user space)?

    Joe Joe
    Juan Gonzales For the most part though, I find that user applications 1) Either poll driver using ioctl, or 2) make blocking call on driver ioctl which return once interrupt is received. Polling interrupt flag via ioctl sounds straight forward vs implementing an event comm link via sysfs/hotplug or...
    on Apr 4, 2011

  • Forum Post: Re: Question on UART and Timer..!!

    Dong-Chan LEE
    Thanks for your replies! I already got two References(Timer, UART). However, How to use the TINTL0? Frankly, for the first time I faced these problems. I had only experience ARM Cortex-M3 and it is solved by Interrupt Vector using C codes. For examples, If the Cortex-M3 is occured...
    on Jul 14, 2011

  • Forum Post: Question on UART and Timer..!!

    Dong-Chan LEE
    Hello, I had start studying TMS320DM6437 EVM(made by Spectrum Digital) with my Intern started a week ago. My Working application is CCS v3.3 and I had success for operating DIP Switch and LED on/off But, I am facing with two problem! First, I can't initializing UART Regsiter. ...
    on Jul 13, 2011

  • Forum Post: how to use dm6437's uart interrupt?

    afshin afshar
    hi i want to use dm6437's uart via interupt How to configure the uart's interrupt ? please help me with some example code tank you
    on Jan 21, 2012

  • Forum Post: The function efs_destroyfile (NDK 1.94) halt the cpu if called repeatedly from software interrupt on dsp DM642

    Video Systems Tech
    Hi all, I am testing an application on a DM642 DSP. I have a hardware interrupt which calls a software interrupt that calls a function “WebUpdate”. Every second this function creates and destroys an xml file using the NDK libraries 1.94: WebUpdate() { efs_destroyfile...
    on Feb 27, 2012

  • Forum Post: how to associate an ISR with a particular non maskable interrupt?

    Sulaiman Sadiq
    i've written an ISR in c code as given below interrupt void int_handler(void) { ..... ..... } i'm using the c64x+ dsp to test it i manually enabled the 1st non maskable interrupt which is INT4 by setting the corresponding bit to 1 in the IER and triggered the interrupt by setting...
    on Apr 6, 2012

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