FPGA loader: Difference between revisions

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[[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).
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== Driver usage ==
== 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:
<pre class="apf">
<pre class="apf">
  # modprobe fpgaloader
  # load_fpga bramtest_top_apf.bin
fpgaloader v0.9
</pre>
</pre>
 
or
*The FPGA loader driver is usable through the standard Linux filesystem interface. To read the available configuration, do:
<pre class="apf">
<pre class="apf">
  # cat /proc/driver/fpga/loader
  # load_fpga firmware.core.rbf
spartan slave serial
</pre>
</pre>


*To upload a new firmware (here ''bramtest_top_apf.bin''), use:
* [[Simple_blinking_LED |  You can find some ready to use bitfiles in ''firmware/leds/blinking_led/bin/'' (blinking LED).]]
<pre class="apf">
# dd if=bramtest_top_apf.bin of=/dev/fpgaloader
</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:
<pre class="apf">
# load_fpga bramtest_top_apf.bin
</pre>


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


==Troubleshots==
[[Category:FPGA]]
*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>

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