FPGA loader: Difference between revisions

From ArmadeusWiki
No edit summary
No edit summary
 
(12 intermediate revisions by 4 users not shown)
Line 1: Line 1:
[[Category: FPGA]]
On this page, you will find all the informations needed to use the Linux FPGA loader driver.
On this page, you will find all the informations needed to use the Linux FPGA loader driver.
This driver allows you to load the FPGA of your APF board from Linux userspace/shell (ie FPGA reprogrammation after Linux boot).
This driver allows you to load the FPGA of your APF board from Linux userspace/shell (ie FPGA reprogrammation after Linux boot).
Line 8: Line 10:


== Driver usage ==
== Driver usage ==
<pre class="apf">
# modprobe fpgaloader
fpgaloader v0.9
</pre>


*The FPGA loader driver is usable through the standard Linux filesystem interface. To read the available configuration, do:
*To upload a new firmware, use the small helper script that can do all the job for you (load driver and then firmware). Just call it with the bitfile (.rbf for APF6SP and .bin for the other boards) as parameter. For example:
<pre class="apf">
<pre class="apf">
# cat /proc/driver/fpga/loader
# load_fpga bramtest_top_apf.bin
spartan slave serial        <<-- on APF9328
spartan slave parallel      <<-- on APF27
</pre>
</pre>
 
or
*To upload a new firmware (here ''bramtest_top_apf.bin''), use:
<pre class="apf">
<pre class="apf">
  # dd if=bramtest_top_apf.bin of=/dev/fpgaloader
  # load_fpga firmware.core.rbf
</pre>
</pre>


*Since 3.1 release, there is a small helper script that can do all the job for you (load driver and then firmware). Just call it with the bitfile as parameter. For example:
* [[Simple_blinking_LED |  You can find some ready to use bitfiles in ''firmware/leds/blinking_led/bin/'' (blinking LED).]]
<pre class="apf">
# load_fpga bramtest_top_apf.bin
</pre>


* [[Simple_blinking_LED |  You can find some ready to use bitfiles in ''firmware/leds/blinking_led/bin/'' (blinking LED).]]


==Troubleshots==
*If the dd is executed just after the modprobe an error may occur (no space left on device). This can be avoid with this small script:
<pre class="apf">
modprobe fpgaloader
while [ ! -c /dev/fpgaloader ]; do
    usleep 1000
done
dd if=bramtest_top_apf.bin of=/dev/fpgaloader
</pre>
This is one of the things that is done by the ''/usr/bin/load_fpga'' utility, mentionned above.


[[Category:FPGA]]
[[Category:FPGA]]

Latest revision as of 14:03, 3 October 2025


On this page, you will find all the informations needed to use the Linux FPGA loader driver. This driver allows you to load the FPGA of your APF board from Linux userspace/shell (ie FPGA reprogrammation after Linux boot).

Driver installation

Driver is installed in default Armadeus rootfs.

For the hackers, code is located in target/linux/modules/fpga/dev_tools/fpga_devtools/.

Driver usage

  • To upload a new firmware, use the small helper script that can do all the job for you (load driver and then firmware). Just call it with the bitfile (.rbf for APF6SP and .bin for the other boards) as parameter. For example:
 # load_fpga bramtest_top_apf.bin

or

 # load_fpga firmware.core.rbf