Hi,<br><br>I'm a new driver writer and i'm trying to understand how to deal with XGpio. My goal is writing a small piece of code that can turn leds on and off. I think this driver should do it:<br><br><br><div style="margin-left: 40px;">
#include <linux/init.h><br>#include <linux/module.h><br><br>#include "xgpio.h"<br>#include "xgpio_ioctl.h"<br>#include "xparameters.h"<br><br>XGpio led;<br><br>static int myteste_init(void)<br>
{<br> XGpio_Initialize (&led, LEDs_4Bit);<br>
XGpio_SetDataDirection(&led,1,0); <br> XGpio_DiscreteWrite(&led,1,0xf); <br> printk (KERN_ALERT "LEDS: Turn off\n");<br> <br> return 0;<br>}<br><br>static int myteste_exit(void)<br>
{<br> <br> XGpio_DiscreteWrite(&led,1,0x0); <br> printk (KERN_ALERT "LEDS: Turn on\n"); <br> return 0;<br>}<br><br>module_init(myteste_init);<br>module_exit(myteste_exit);<br><br></div>But i have this error:<br>
<div style="margin-left: 40px;">ERROR: "XGpio_SetDataDirection" [drivers/char/mytest/mytest.ko] undefined!<br>ERROR: "XGpio_Initialize" [drivers/char/mytest/mytest.ko] undefined!<br>ERROR: "XGpio_DiscreteWrite" [drivers/char/mytest/mytest.ko] undefined!<br>
<br></div>Any suggestion? This is the makefile:<br> EXTRA_CFLAGS += -I$(TOPDIR)/drivers/xilinx_common<br> EXTRA_CFLAGS += -I$(TOPDIR)/drivers/char/xilinx_gpio<br> obj-$(CONFIG_MY_TEST) := mytest.o<br><br><br>
Is there any way to use *.dts instead xparameters.h<br><br>Thanks,<br>Bruno<br><br><br>
<br><br><div class="gmail_quote">On Tue, Oct 21, 2008 at 9:08 PM, John Linn <span dir="ltr"><<a href="mailto:John.Linn@xilinx.com" target="_blank">John.Linn@xilinx.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div link="blue" vlink="purple" lang="EN-US">
<div><div>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">Hi Bruno,</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">I don't think you can do what
you're trying to do, unless I'm misunderstanding or just not smart
enough.</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">The EDK from Xilinx ships with drivers
that are not Linux drivers. Those functions in main below are intended
for a standalone (no RTOS) system such they can't just be called from a
user app in Linux. You are sort of trying to create a user mode driver
with what you are doing.</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">There is a character mode gpio driver in
the Xilinx git tree, git://<a href="http://git.xilinx.com/linux-2.6-xlnx.git" target="_blank">git.xilinx.com/linux-2.6-xlnx.git</a> that has been used
previously. I don't currently test that driver as we're in
the process of getting a flattened gpio driver that is not char driver ready
for mainline.</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">I plan to take a look at the char mode
gpio driver today as there's another question regarding it on the list.</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">Thanks,</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">John</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></p>
</div><div style="border-style: none none none solid; border-color: -moz-use-text-color -moz-use-text-color -moz-use-text-color blue; border-width: medium medium medium 1.5pt; padding: 0in 0in 0in 4pt;"><div>
<div>
<div style="text-align: center;" align="center"><font face="Times New Roman" size="3"><span style="font-size: 12pt;">
<hr align="center" width="100%" size="2">
</span></font></div>
<p><b><font face="Tahoma" size="2"><span style="font-size: 10pt; font-family: Tahoma; font-weight: bold;">From:</span></font></b><font face="Tahoma" size="2"><span style="font-size: 10pt; font-family: Tahoma;"> linuxppc-embedded-bounces+john.linn=<a href="http://xilinx.com" target="_blank">xilinx.com</a>@<a href="http://ozlabs.org" target="_blank">ozlabs.org</a>
[mailto:<a href="mailto:linuxppc-embedded-bounces%2Bjohn.linn" target="_blank">linuxppc-embedded-bounces+john.linn</a>=<a href="http://xilinx.com" target="_blank">xilinx.com</a>@<a href="http://ozlabs.org" target="_blank">ozlabs.org</a>] <b><span style="font-weight: bold;">On Behalf Of </span></b>Bruno Monteiro<br>
<b><span style="font-weight: bold;">Sent:</span></b> Tuesday, October 21, 2008
8:36 AM<br>
<b><span style="font-weight: bold;">To:</span></b> <a href="mailto:linuxppc-embedded@ozlabs.org" target="_blank">linuxppc-embedded@ozlabs.org</a><br>
<b><span style="font-weight: bold;">Subject:</span></b> Compile program using XGpio</span></font></p>
</div>
<p><font face="Times New Roman" size="3"><span style="font-size: 12pt;"> </span></font></p>
</div><p><font face="Times New Roman" size="3"><span style="font-size: 12pt;">Hi all,<div><div></div><div><br>
<br>
I'm working with a Virtex2p. I have a running system using:</div></div></span></font></p><div><div></div><div>
<ul type="disc">
<li><font face="Times New Roman" size="3"><span style="font-size: 12pt;">EDK 9.1</span></font></li>
<li><font face="Times New Roman" size="3"><span style="font-size: 12pt;">Crosstool-ng (svn)</span></font></li>
<li><font face="Times New Roman" size="3"><span style="font-size: 12pt;">linux-2.6-xlnx</span></font></li>
<li><font face="Times New Roman" size="3"><span style="font-size: 12pt;">BusyBox 1.12.1</span></font></li>
</ul>
<p style="margin-bottom: 12pt;"><font face="Times New Roman" size="3"><span style="font-size: 12pt;">Now, i'm trying to build
a small program that turn off leds. I guess it should be something like this:</span></font></p>
<div style="margin-left: 30pt;">
<p style="margin-bottom: 12pt;"><font face="Times New Roman" size="3"><span style="font-size: 12pt;">void main (void){<br>
XGpio led; <br>
XGpio_Initialize (&led, XPAR_LEDS_4BIT_DEVICE_ID);<br>
XGpio_SetDataDirection(&led,1,0);<br>
XGpio_DiscreteWrite(&led,1,0xf); <br>
}</span></font></p>
</div>
<p style="margin-bottom: 12pt;"><font face="Times New Roman" size="3"><span style="font-size: 12pt;"><br>
I want to know how to compile it (without EDK). Any suggestion? <br>
<br>
<br>
Thanks,<br>
Bruno Monteiro </span></font></p>
</div></div></div>
</div>
<br clear="all"><div> This email and any attachments are intended for the sole use of the named recipient(s) and contain(s) confidential information that may be proprietary, privileged or copyrighted under applicable law. If you are not the intended recipient, do not read, copy, or forward this email message or any attachments. Delete this email message and any attachments immediately.
</div></div>
</blockquote></div><br>