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).
  
== Module compilation & installation==
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== Driver installation==
*The first thing you have to do is to activate the driver in the Linux configuration:
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Driver is installed in default Armadeus rootfs.
$ make linux-menuconfig
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*In ''Device Drivers --> Armadeus specific drivers'' select "Armadeus FPGA configuration driver".
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For the hackers, code is located in ''target/linux/modules/fpga/dev_tools/fpga_devtools/''.
*rebuild Linux or the complete rootfs
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$ make
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Once done, you will find the new driver in the /lib/modules/drivers/ of the rootfs
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== Driver usage ==
In the host directory ''target/linux/modules/fpga/dev_tools/fpga_devtools/'' you will find a script named fpgaloader.sh.
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Copy this script on the target and launch it
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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:
  # sh fpgaloader.sh
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<pre class="apf">
This will install the driver.
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  # load_fpga bramtest_top_apf.bin
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</pre>
  
===Remark===
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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:
The default FPGA version is the Spartan3 200k.  
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<pre class="apf">
The version can be changed when installing the module (insmod /lib/modules/drivers/fpgaloader.ko fpga_descriptor=0 for a 200K and 1 for a 400k).  
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# load_fpga firmware.core.rbf
These informations are given by the /proc interface.
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</pre>
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* [[Simple_blinking_LED |  You can find some ready to use bitfiles in ''firmware/leds/blinking_led/bin/'' (blinking LED).]]
  
== Driver usage ==
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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}}
*The FPGA loader driver is usable through the standard Linux filesystem interface. To read the available configurations, do:
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# cat /proc/driver/fpga/loader
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==Troubleshots==
*The displayed sizes correspond to the different FPGA versions supported by the board:
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=== APF51 ===
** 130k: Spartan 200k
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* Use binary format '''.bin''', bitstream format '''.bit''' doesn't work.
** 212k: Spartan 400k
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All the troubleshots are handled by the ''/usr/bin/load_fpga'' utility, mentionned above.
  
*To upload a new firmware (here ''bramtest_top_apf.bin''), write:
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[[Category:FPGA]]
# dd if=bramtest_top_apf.bin of=/dev/fpga/fpgaloader
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Latest revision as of 08:41, 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.