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Post subject: Mange ISA Hardware...
 Posted: Jun 15, 2005 - 01:39 PM
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Active Member
Joined: Apr 20, 2005
Posts: 80
Location: Italy
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http://www.qnx.com/developers/articles/article_304_2.html&printable=1
in here I found how to work with a PCI device which have no driver.
I read that
Code:
Different buses have different mechanisms for determining which resources have been assigned to the device. On some buses, such as the ISA bus, there's no such mechanism. How do you determine whether an ISA device is present in the system and how it's configured? The answer is card-dependent (with the exception of "PnP" ISA devices).
so my question is: there is a similar guide but referencing to ISA busses?
thanks... |
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Post subject: RE: Mange ISA Hardware...
Posted: Jun 15, 2005 - 04:29 PM
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Senior Member
Joined: Oct 28, 2004
Posts: 265
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| In referencing ISA buses, if it is not a PnP device, then there must be a memory location in the ISA card which you can read and write to. It is this memory address (which should be in the ISA bus memory address range) that you need to map using mmap_device_io() and the pointer returned by this function is used in the in() or out() function to communicate with the device. Hope this help. |
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Matthew Jin
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Post subject:
Posted: Jun 16, 2005 - 09:14 AM
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Joined: Apr 20, 2005
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I solved it just mapping the region (0xD0000) using mmap_device_memory and so using the mapped register as a vector...
it is the only way I found in which it work...
using in/out it access an unknown memory area because it read the same value with the board installed or not... |
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Post subject:
Posted: Jun 16, 2005 - 02:07 PM
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Senior Member
Joined: Mar 02, 2003
Posts: 277
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| by the way,I want to know how to support isa buses in qnx,which command should I add in build file? |
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Post subject:
Posted: Jun 16, 2005 - 02:45 PM
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QNX Master
Joined: Sep 01, 2002
Posts: 2667
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| Nothing is required to support ISA (I don't think QNX support ISA Pnp). It's just there, just like RAM. |
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Post subject:
Posted: Jun 16, 2005 - 02:49 PM
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QNX Master
Joined: Sep 01, 2002
Posts: 2667
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kadalthewizard wrote:
I solved it just mapping the region (0xD0000) using mmap_device_memory and so using the mapped register as a vector...
it is the only way I found in which it work...
using in/out it access an unknown memory area because it read the same value with the board installed or not...
in/out instructions provide access to a different space then using normal address. This is not a QNX concept, this is x86 stuff. One could argue that today in/out are not necessary anymore. In the "old" days, the in/out were very usefull, given CPU could only access 1Meg of ram These IO instruction provide another set of address space outside of normal memory space. |
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Post subject:
Posted: Jun 16, 2005 - 03:34 PM
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Posts: 80
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but there is a way, knowing only the base address, to know the port registers? (or maybe, just the offset for tx and rx or something?)...
in the user manual there's no references to something similar... |
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Post subject:
Posted: Jun 16, 2005 - 07:36 PM
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QNX Master
Joined: Sep 01, 2002
Posts: 2667
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| There is no standard way, it's up to each board to map register as they see fit. You need the documentation. |
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Post subject:
Posted: Jun 17, 2005 - 06:59 AM
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ok..the documentation I can use don't have othing similar...I contact the technical support and they sayd that is useful to use the API function for load the board.
I sayd that I've already do this but it not work ("Board not found" error);
they replyes:
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The CEI-x20 API communicates with the hardware exclusively via direct pointer access relative to the base board address. None of the CEI-x20 boards use i/o ports.
All that the low-level implementation needs to do is pass the mapped address of the board back to the API (via vbtMapBoardAddresses). All board accesses are performed by the API relative to that address, so no API modifications should be necessary.
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but I've already try to do this mmapping the real address and passing it to the function but the result is the same ("board not found") |
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Post subject:
Posted: Jun 17, 2005 - 07:54 PM
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Joined: Sep 01, 2002
Posts: 2667
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"but I've already try to do this mmapping the real address and passing it to the function but the result is the same",
maybe you are doing it wrong. |
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Post subject:
Posted: Jun 20, 2005 - 09:34 PM
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Senior Member
Joined: Oct 28, 2004
Posts: 265
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Here is sample code for doing mmap_io. you need to do ThreadCtl() first for permission purpose.
ok = ThreadCtl(_NTO_TCTL_IO, 0);
if (ok==-1)
{
printf("You do not have permission to start this process\n");
exit(1);
}
io_ptr=mmap_device_io(2,0x1EA);
out8(io_ptr,0x0F); |
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Matthew Jin
Software Engineer
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Post subject:
Posted: Jun 21, 2005 - 01:45 PM
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Active Member
Joined: Apr 20, 2005
Posts: 80
Location: Italy
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I solved Everything!! chenging every mmap with mmap_device_memory (with right args) and forcing some addresses at my address (0xD0000)..
now I've got only one problem(I don't know the size of the mappe area, so I can't correctly manage the addresses) but the technichal support will help me (I hope) |
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Post subject:
Posted: Jun 21, 2005 - 05:36 PM
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Senior Member
Joined: Oct 28, 2004
Posts: 265
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| I think that is hardware dependent. You should see your hardware spec. |
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Matthew Jin
Software Engineer
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Post subject:
Posted: Jun 22, 2005 - 10:03 AM
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Post subject:
Posted: Mar 25, 2008 - 08:14 AM
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Joined: Feb 20, 2008
Posts: 12
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jinma wrote:
Here is sample code for doing mmap_io. you need to do ThreadCtl() first for permission purpose.
[color=green]ok = ThreadCtl(_NTO_TCTL_IO, 0);
if (ok==-1)
{
printf("You do not have permission to start this process\n");
exit(1);
}
io_ptr=mmap_device_io(2,0x1EA);
out8(io_ptr,0x0F);
[/color]
Hi! Can I run below line? because I have not yet receive the card but my teamleader ask me to still write the driver.
Code:
i= in16(io_ptr+0x10);
0x1EA+0x10 still is a port of the card
Thanks!
I'm sorry! I don't know why color of texr is similar. I try to use many colors to....
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