Automatically load fpga_0.94.bit on system startup

Applications, development tools, FPGA, C, WEB
Post Reply
mikhail.zakharov
Posts: 1
Joined: Wed Jan 02, 2019 11:55 pm

Automatically load fpga_0.94.bit on system startup

Post by mikhail.zakharov » Mon Mar 04, 2019 7:15 am

Problem:
I have several C/C++ applications built for the RedPitaya which use the API (rp.so).The manual says, that in order to use the API, I have to load an FPGA image by doing

Code: Select all

cat /opt/redpitaya/fpga/fpga_0.94.bit > /dev/xdevcfg
. When I do it from command line (e.g. console) everything works. When I do not do it, the code crashes with SIGBUS.
I need to load it automatically, before my program starts.

What did I do to solve it
I am starting my program as a linux systemd daemon. A file was created

Code: Select all

#!/bin/bash

cat /opt/redpitaya/fpga/fpga_0.94.bit > /dev/xdevcfg
sleep 2
exec /root/XXX/YYY
The unit file is as follows:

Code: Select all

[Unit]
Description = RedPitaya WaveformGenerator
After = network.target
Requires=ZZZZ

[Service]
Environment="LD_LIBRARY_PATH=/opt/redpitaya/lib"
ExecStart = /root/XXX/YYY.sh

[Install]
WantedBy = multi-user.target
however every other boot the system hangs, blue light is off.

I thought to replace the cat with

Code: Select all

dd if=/opt/redpitaya/fpga/fpga_0.94.bit of=/dev/xdevcfg ibs=1M
so that the entire file is first read then dumped to FPGA. This did not help.

Other system information
RedPitaya 1.1, Latest stable image from
Ecosystem 0.98

Questions
How do I load the bitfile automatically before my application start so that everything does not crash?
I attempted to load it right after local-fs.target is reached (early in the boot process) as well as after multi-user.target is reached (late in the boot process) with the same results.
Should I look instead into configuring FSBL to load the fpga_0.94.bit instead whatever it is loading now?
Or can U-Boot do it?
Is it OK for FSBL to load that bitfile (version 0.94) although the ecosystem is 0.98?

Post Reply
jadalnie klasyczne ekskluzywne meble wypoczynkowe do salonu ekskluzywne meble tapicerowane ekskluzywne meble do sypialni ekskluzywne meble włoskie

Who is online

Users browsing this forum: No registered users and 1 guest