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Hi friends, I am working on a MS project which requires image processing at EVM6201. I am getting the images with a Tekram framegraber board and camera. Both EVM6201 and framegraber are on PCI bu of my host PC. The CCS accesses to EVM6201 with no problem when the framegraber is not installed. But when both of them are installed, CCS cannot access to EVM6201. I think there may be an I/O conflict. But I have no idea about the solution. As I know, the manuals of neither EVM nor framegraber includes information about setting another I/O address. I will be waiting for your experiences and solution suggestios.... Best Regards.... Ozgur

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Ozgur, There wouldn't be an I/O address conflict, as the EVM does not use I/O ports. The problem is that there must be IRQ (interrupt) sharing), where your PC BIOS or Windows is assigning both boards to the same interrupt. This is not a problem in most cases since that is the way PCI is designed to work with level-sensitive, shareable interrupts. However, there is a software issue involved where the drivers of devices on the same IRQ must support sharing. If the condition that causes an interrupt is not on its board, the driver should indicate so to the OS so the next device driver on the IRQ can look at its interrupt status register and act appropriately. I am aware of several NIC and video cards that have a problem with IRQ sharing. My recommendation is to try moving the boards to different slots to see if the IRQs get assigned differently. You can also play games sometimes with your BIOS settings for IRQs, as well as using the Device Manager to reserve the IRQ and let it assign it to another one. There really isn't one answer for everyone. PCI is intended to make things easier, but many times it becomes "plug and pray". Good luck, Brian wrote: > Hi friends, > I am working on a MS project which requires image processing > at EVM6201. I am getting the images with a Tekram framegraber > board and camera. Both EVM6201 and framegraber are on PCI bu of my > host PC. The CCS accesses to EVM6201 with no problem > when the framegraber is not installed. But when both of them are > installed, CCS cannot access to EVM6201. I think there may be an I/O > conflict. But I have no idea about the solution. As I know, the > manuals of neither EVM nor framegraber includes information about > setting another I/O address. > I will be waiting for your experiences and solution suggestios.... > > Best Regards.... > Ozgur > > To Join: Send an email to > > To Post: Send an email to > > To Leave: Send an email to > > Archives: http://www.egroups.com/group/c6x > > Other Groups: http://www.dsprelated.com

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Brian, I'm sure many of us have experienced all sorts of issues with drivers that don't share interrupts properly. You mentioned that you are aware of several NIC and video card drivers that mis-behave; would you happen to know of any public resources where such offenders are listed? I'm not sure that such a 'Hall of Shame' could exist without attracting lawyers, but it would most certainly be useful, would it not? Jeff Jeff Bateman, Senior Systems Engineer Transtech DSP Corp. 20 Thornwood Drive, Ithaca, NY 14850-1263, USA Voice (607)257-8678 ext. 22 Fax (607)257-8679 http://www.transtech-dsp.com > -----Original Message----- > From: Brian Carlson [mailto:] > Sent: Wednesday, 08 November, 2000 22:29 > To: > Subject: Re: [c6x] I/O conflict between EVM6201 and Framegraber > Ozgur, > > There wouldn't be an I/O address conflict, as the EVM does not use > I/O ports. The problem is that there must be IRQ (interrupt) > sharing), where > your PC BIOS or Windows is assigning both boards to the same interrupt. > This is not a problem in most cases since that is the way PCI is designed > to work with level-sensitive, shareable interrupts. > > However, there is a software issue involved where the drivers of devices > on the same IRQ must support sharing. If the condition that > causes an interrupt > > is not on its board, the driver should indicate so to the OS so > the next device > driver > on the IRQ can look at its interrupt status register and act > appropriately. > > I am aware of several NIC and video cards that have a problem > with IRQ sharing. > My recommendation is to try moving the boards to different slots > to see if the > IRQs get assigned differently. You can also play games sometimes > with your > BIOS settings for IRQs, as well as using the Device Manager to > reserve the IRQ > and let it assign it to another one. There really isn't one answer for > everyone. > > PCI is intended to make things easier, but many times it becomes "plug and > pray". > > Good luck, > Brian > > wrote: > > > Hi friends, > > I am working on a MS project which requires image processing > > at EVM6201. I am getting the images with a Tekram framegraber > > board and camera. Both EVM6201 and framegraber are on PCI bu of my > > host PC. The CCS accesses to EVM6201 with no problem > > when the framegraber is not installed. But when both of them are > > installed, CCS cannot access to EVM6201. I think there may be an I/O > > conflict. But I have no idea about the solution. As I know, the > > manuals of neither EVM nor framegraber includes information about > > setting another I/O address. > > I will be waiting for your experiences and solution suggestios.... > > > > Best Regards.... > > Ozgur > > > > To Join: Send an email to > > > > To Post: Send an email to > > > > To Leave: Send an email to > > > > Archives: http://www.egroups.com/group/c6x > > > > Other Groups: http://www.dsprelated.com > > To Join: Send an email to > > To Post: Send an email to > > To Leave: Send an email to > > Archives: http://www.egroups.com/group/c6x > > Other Groups: http://www.dsprelated.com

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