Messages in this thread | | | Date | Thu, 22 Jul 2004 11:01:06 +0200 (CEST) | From | Eva Dominguez <> | Subject | aditional parallel port problems |
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Hi everybody!
Firstable, I have to say that my problem is a Hardware problem, so, if you think this is not the proper forum,tell me please.
My situation is like this: I have a "hand-made" circuit that works with the orders of a parallel port from PC. With this orders, the circuit turn on/off several devices connected to it.
I work with a PC with Suse9.0 (kernel 2.4.21-226-default) with an aditional parallel port in a PCI Multio I/O card with NM9835CV chip.
Besides, I have a C program that send (outb, iopl, ioperm...)the orders to the address of the parallel port I say.
My problem is: when I run this C program with the motherboard paralell port (lp0) the circuit works properly. But, it doesnt work with the aditional parallel port of the card (lp1)
I write in this list because I have changed de operating system some days ago. I had RedHat6.2 (kernel 2.2) and everything worked perfectly with the same card. I have bought other cards but nothing.
I have seen some things:
1. With de PC TURNED ON and TURNED OFF, if I conect the circuit with the motherboard parallel port (lp0) some devices turn on and other turn off. But when if connect the circuit with the parallel port of the card (lp1) different devices turn on/off. All of this happens without executing eny program, only connecting the ports and the circuit with a bus. It seems to be the internal circuits of eacb port. Could it be the cause that nothing works? in this case...how can I change that?
2. The card is "Multi-mode (SPP, EPP, ECP, PS2)". Is possible that the circuit only works with SPP mode. I can change the motherboard parallel port mode (with BIOS) but , how can I change the parallel port mode of the card?
3. Before all this, I have tested the parallel port address of the card and the irq of the slot and I have added to /etc/modules.conf the line: "options parport_pc io=0x378,0x8800 irq=7,5" Later, I have connected a printer to the pararallel port of the card and it prints right. Could the printer force the parallel port of the card to change its own mode to ECP or EPP? If I connect a SPP device, could it force that port to change its mode to SPP and everything works?
4. I have changed the slot of the card and nothing happens.
5. The command "dmesg | grep parport" displays:
"parport0: PC-style at 0x378 irq 7 [PCSPP, TRISTATE, EPP]" (Is this line telling me the mode of the parallel port?? in this case...what does it mean?) "parport1: PC-style at 0x8800 irq 5 [PCSPP, TRISTATE, EPP]" "lp0: using parport0 (interrupt-driven)" "lp1: using parport1 (polling)" 6. I have seen in this mailing list an email about two patches (00_parport and 01_netmos) to work with this kind of chips. I have never installed patches and I dont find help about it. I am not so sure that this patches are the solution of my problem
This is the end of my "little" email. Thank you very much!!
Eva
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