Installing OpenOCD from sources - HCE Engineering S.r.l.
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Installing OpenOCD from sources

Most GNU/Linux distributions offer the possibility to install OpenOCD directly using their packages management system, however these package may refer to not so updated releases of the software and this means that some CPUs may not be supported at all! That’s way could be very useful to know how to install OpenOCD from sources in order to get its latest release!

Downloading the code

First of all we need to download the official GIT source or a related mirror (I’m going to use the Spen’s Official OpenOCD Mirror):

The needed extra packages

Once the sources have been downloaded we need some extra packages in order to get them compiled. On my Ubuntu Xenial I used the following command to install such software:

Compiling OpenOCD

Now we are ready! Just enter into the openocd directory and executing the bootstrap script as follow:

After that we can start configuring the sources by using the usual configure script which is able to auto detect our hardware. However we can force any special feature we want by simply adding one or more option arguments as shown below:

In the command above I force the  CMSIS-DAP compliant debugger support which I need to program my SAME70 based board.

When configure script has finished its job we can start the OpenOCD compilation and installation with the usual UNIX commands:

Please, note that I used the -j8 option argument in order to have 8 compilation threads and the sudo command to be able to install the software into the system without permissions erros.

Testing the code

Once the compilation is finished we can test our new OpenOCD as follow (remeber that for this test I used my SAME70 based board). On a terminal we have to execute OpenOCD specifying the board’s script we wish to manage:

Note that the sudo command may be mandatory in case you need to use an USB connection!

Note also that the path /usr/local/share/openocd/scripts/board/atmel_same70_xplained.cfg may vary in case you decide to install OpenOCD into a custom directory.

If everything works well you should see something like the following:

Now we can use different connections types to control OpenOCD. I use the telnet connection as below:

Then I can easily reprogram the CPU’s internal flash with the following commands:

Note that file /tmp/nuttx.hex is the new image I wish to program into my CPU.

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