xPC Target DMM-32DX-AT A/D Driver problem.
in [Matlab]
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From: Gordon Weast on 18 Dec 2009 15:29 Sam, I just couldn't put this problem down. We have been testing the MM-32DX on our older TargetBox machines with no problems. These are 266 and 400 MHz Pentium processors. We also have an Athena II from Diamond that uses a VIA processor running at 850 MHz. In the default configuration of this machine, the MM-32 DX shows problems here. I get lots of glitches in the output and occasionally I also see the AD reset message. The MM-32X board we have also shows problems on this CPU. The older MM-32 board works perfectly. This CPU benchmarks out to be just as fast as a 400 MHz PII. The VIA wins by consuming much less power. After trying a bunch of things, I finally looked in the BIOS and I found an interesting setting for the speed of the PC104 expansion bus. This CPU has a Phoenix BIOS and the setting is under the Advanced section. The choices are 'normal', 'accelerated' and 'turbo'. The default setting is 'normal' which shows the problems. I then tried 'accelerated' and the problems went away. The A/D readings are perfect. Finally I tried 'turbo' and the results were worse than 'normal' mode. So, as far as I can tell, the problems you're seeing are hardware compatibility issues between the MM-32 DX and the CPU board you're using. If the machine has a BIOS setting that allows you to tune the PC104 bus (probably identified as the ISA bus), that may allow you to find a working setting. If you can't adjust it, then you may need to find a different CPU board. Gordon Weast xPC Target Development The MathWorks Sam wrote: > Gordon: > > Thanks for the update. I will take it up with support. > > Just out of curiosity, what kind of CPU are you using for your test setup? I > can look around to see if i can get that CPU. > > regards, > > Gordon Weast <gweast(a)mathworks.com> wrote in message > <hg6d8i$pku$1(a)fred.mathworks.com>... >> Sam, >> >> This really sounds like a hardware revision issue. Please contact >> MathWorks tech support and open a problem report. Mention this email as a >> starting point. We may need to borrow your board to see what's different >> about it. >> >> We have our DX board in a test setup where we're doing exactly what you are >> trying to do and our board works fine. >> >> Gordon Weast xPC Target Development The MathWorks >>
From: Sam on 21 Dec 2009 10:55
Gordon: Thanks for the update. I checked to see if there was a setting in the BIOS of my CPU for PC104 bus but I could not see any in the CPU boards that I have. All CPUs have the 'General Software Embedded BIOS'. Based on your input I pulled in 3 CPUs that I could find here (Pentium III 800 Mhz, Pentium III 900 MHz and Pentium M 1.8 GHz) 1. I tried the 32DX-AT and 32X-AT boards on the Pentium III @ 800 Mhz CPU and it shows glitches in the measurement on 32X-AT and near zero readings on the 32DX-AT board. The 32-AT board works fine on this CPU. 2. I tried the 32DX-AT and 32X-AT boards on the Pentium III @ 900 Mhz CPU and it shows a lot of glitches in the measurement. The 32-AT board works fine on this CPU. 3. I tried the 32DX-AT and 32X-AT boards on the Pentium M based 1.8 Ghz CPU. The the 32DX-AT board shows the near zero measurements. However, it works fine with the 32-AT and the 32X-AT board. I considered the Athena II as an option but it does not have the PC104 plus bus which i need for another I/O card. Since 32X-AT boards are still available I am going to work with the 1.8GHz + 32X-AT board combination for now. I will work with your tech support to obtain a recommendation for a CPU with a PC104-plus bus that will also work with the 32DX-AT board. regards, Gordon Weast <gweast(a)mathworks.com> wrote in message <4B2BE629.7010004(a)mathworks.com>... > Sam, > > I just couldn't put this problem down. > > We have been testing the MM-32DX on our older TargetBox machines with > no problems. These are 266 and 400 MHz Pentium processors. > > We also have an Athena II from Diamond that uses a VIA processor running > at 850 MHz. In the default configuration of this machine, the MM-32 DX > shows problems here. I get lots of glitches in the output and occasionally > I also see the AD reset message. The MM-32X board we have also shows problems > on this CPU. The older MM-32 board works perfectly. This CPU benchmarks > out to be just as fast as a 400 MHz PII. The VIA wins by consuming much > less power. > > After trying a bunch of things, I finally looked in the BIOS and I found > an interesting setting for the speed of the PC104 expansion bus. This CPU > has a Phoenix BIOS and the setting is under the Advanced section. The > choices are 'normal', 'accelerated' and 'turbo'. The default setting is > 'normal' which shows the problems. I then tried 'accelerated' and the > problems went away. The A/D readings are perfect. Finally I tried 'turbo' > and the results were worse than 'normal' mode. > > So, as far as I can tell, the problems you're seeing are hardware compatibility > issues between the MM-32 DX and the CPU board you're using. If the machine > has a BIOS setting that allows you to tune the PC104 bus (probably identified > as the ISA bus), that may allow you to find a working setting. > > If you can't adjust it, then you may need to find a different CPU board. > > Gordon Weast > xPC Target Development > The MathWorks > > Sam wrote: > > Gordon: > > > > Thanks for the update. I will take it up with support. > > > > Just out of curiosity, what kind of CPU are you using for your test setup? I > > can look around to see if i can get that CPU. > > > > regards, > > > > Gordon Weast <gweast(a)mathworks.com> wrote in message > > <hg6d8i$pku$1(a)fred.mathworks.com>... > >> Sam, > >> > >> This really sounds like a hardware revision issue. Please contact > >> MathWorks tech support and open a problem report. Mention this email as a > >> starting point. We may need to borrow your board to see what's different > >> about it. > >> > >> We have our DX board in a test setup where we're doing exactly what you are > >> trying to do and our board works fine. > >> > >> Gordon Weast xPC Target Development The MathWorks > >> |