No, nothing, that is what I thought of first. I did have a parallel fingerprintscanner, but after I formatted, the problem remains ( and it is pissing me off big time because nobody knows what the problem is
)
Gideon
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| nokia 3310 LCD - Parallel port pins get low http://forum.lcdinfo.com/viewtopic.php?f=8&t=944 |
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| Author: | Gnuitenjong [ Tue Dec 14, 2004 15:44 ] |
| Post subject: | nokia 3310 LCD - Parallel port pins get low |
Hi everybody, I hooked up my nokia 3310 screen to my parallel port, and it works, however after about 30 seconds, the lcd gets blank. I downloaded a parallel port monitor and discovered that after about 30 sec. D0-D7 get low, and then turn high again. Does anyone know what is causing my port to do this? I tried different parallel port settings but that doesn't help. Gideon |
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| Author: | Henri [ Thu Dec 16, 2004 22:32 ] |
| Post subject: | |
Do you have some printer drivers installed that are using the LPT port ? Just guessing here but sounds like something else could be accessing the port also. Anyone else seen similar behaviour ? |
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| Author: | Gnuitenjong [ Wed Dec 22, 2004 20:36 ] |
| Post subject: | |
No, nothing, that is what I thought of first. I did have a parallel fingerprintscanner, but after I formatted, the problem remains ( and it is pissing me off big time because nobody knows what the problem is )
Gideon |
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| Author: | Henri [ Thu Dec 30, 2004 20:16 ] |
| Post subject: | |
Here is mentioned something about XP doing writes to the port: http://www.lvr.com/jansfaq.htm Quote: Q: If a logic 1 is written to the Control Port, bit 0, (Strobe), the PC clears all of the port bits once every five seconds for about a minute.
A: Some versions of Windows XP look for devices by periodically writing to the port. A registry key can disable this behavior. The following registry setting disables the port writes: [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Parport\Parameters] "DisableWarmPoll"=dword:00000001 The following registry setting enables the port writes: [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Parport\Parameters] "DisableWarmPoll"=dword:00000000 You can make these changes in Windows' regedit utility. Or to make the changes automatically, create and save the following text files: DisableWarmBoot.reg contains the following text: Windows Registry Editor Version 5.00 [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Parport\Parameters] "DisableWarmPoll"=dword:00000001 EnableWarmBoot.reg contains the following text: Windows Registry Editor Version 5.00 [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Parport\Parameters] "DisableWarmPoll"=dword:00000000 To change a registry key, run the program. As always, use caution when working with the registry, which contains critical values for configuring and running the PC. After making a change, reboot the PC. Disabling the port writes can also eliminate port timeout errors received in some applications. Thanks to Richard Shotbolt for informing me of this fix. I don't know if this has anything to do with it though. |
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