Hi, I am a newbie to device programming in Linux. I want to use the Parallel port as IO port for glowing some LED's. I am trying to build the kernel with Parallel port support but the kernel does not boots. I have tried following: 1. I tried installing the LCD drivers as directed in the Device-drivers-HowTo page; but it also did not work. The Kernel did not boot after I did ./ktest 2. I wrote a program to SET and clear bits on gpiog (without parallel port support) using a program referred in http://mhonarc.axis.se/dev-etrax/msg02550.html but I did not get any output (voltage) at the LPT pin header. I am using Axis 82 MCM. The method/assumptions I am carrying are: A. I hope the pin which is soldered square in x23 is pin number 1. B. I am measuring the output of the LPT header using Multimeter directly. Is it fine or I require to use some different circuit. I tried to connect LED's to connect to d0 and GND through a step-down resistor of 320 Ohms but the LED did not glow for the set of terminals where multimeter is showing 3.3 volts. I have gone through all the previous mails in the archive regarding Parallel port. But I did not understand them much :( I am also attaching the kernelconfig which had the parallel port setting and which did not work. Thanks in advance, Regards, Alok.
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