Difference between revisions of "FPGA loader"

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[[Category: FPGA]]
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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 ==
<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:
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*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
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# load_fpga bramtest_top_apf.bin
spartan slave serial        <<-- on APF9328
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spartan slave parallel      <<-- on APF27, APF51
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</pre>
 
</pre>
  
 
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* For APF6_SP a periph.rbf must be [[Target_Software_Installation#APF6_SP | loaded in U-Boot]] before, the core.rbf can then be loaded under linux with load_fpga:
*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 as parameter. For example:
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<pre class="apf">
 
<pre class="apf">
  # load_fpga bramtest_top_apf.bin
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  # load_fpga firmware.core.rbf
 
</pre>
 
</pre>
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* [[Simple_blinking_LED |  You can find some ready to use bitfiles in ''firmware/leds/blinking_led/bin/'' (blinking LED).]]
  
 
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{{Note| On '''APF6_SP''' the command load_fpga work only throught PCIe, see [[PCIe fpga load]] to know how it works}}
* [[Simple_blinking_LED | You can find some ready to use bitfiles in ''firmware/leds/blinking_led/bin/'' (blinking LED).]]
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{{Note| On apf9328_devfull and on apf27_dev a LED is already soldered on fpga. For apf27_dev the fpga bank1 must be powered with 3.3V (connect pin 39 and pin 1 on J20 header)}}
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==Troubleshots==
 
==Troubleshots==
=== APF27 ===
 
*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>
 
 
=== APF51 ===
 
=== APF51 ===
* do not use a file stored in flash to load the FPGA. Please copy it to the RAM (/tmp) before.
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* Use binary format '''.bin''', bitstream format '''.bit''' doesn't work.
* Use binary format '''.bin''', bitstream format '''.bit''' does'nt work.
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All the troubleshots are handled by the ''/usr/bin/load_fpga'' utility, mentionned above.
 
All the troubleshots are handled by the ''/usr/bin/load_fpga'' utility, mentionned above.
  
 
[[Category:FPGA]]
 
[[Category:FPGA]]

Latest revision as of 07:41, 27 August 2015


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
  • For APF6_SP a periph.rbf must be loaded in U-Boot before, the core.rbf can then be loaded under linux with load_fpga:
 # load_fpga firmware.core.rbf
Note Note: On APF6_SP the command load_fpga work only throught PCIe, see PCIe fpga load to know how it works


Troubleshots

APF51

  • Use binary format .bin, bitstream format .bit doesn't work.

All the troubleshots are handled by the /usr/bin/load_fpga utility, mentionned above.