OsmocomBB » Nuttx-bb

NuttX compilation was done using CodeSourcery arm-2010.09-51-arm-none-eabi.bin, other toolchain could fail.

NuttX can be configured differently depending on what we want.

The possible configs are:

 * compal_e88/nsh_highram : for the gta02 using the osmocon for the romloader

 * compal_e99/nsh_highram : for the c155 using osmocon + loader.compalram.bin as a loader

 * compal_e99/nsh_compalram : for the c155 using osmocon to load it

nsh is the nuttx shell(nuttx can also run standalone apps without a shell).

== standalone nuttx ==

if you want a standalone nuttx(without linking to osmocombb for the drivers) do the following:

{{{

make clean

make distclean

}}}

Remove sercomm directories:

{{{

$ rm -rf drivers/sercomm

$ rm -rf include/nuttx/sercomm

}}}

Remove sercomm reference at drivers/Makefile:

{{{

-include sercomm/Make.defs

}}}

Then configure nuttx:

{{{

$ cd nuttx/tools

$ ./configure.sh compal_e99/nsh_highram

}}}

Then apply manually the following pseudo-diff in nuttx/.config :

{{{

-CONFIG_SERCOMM_CONSOLE=y

+CONFIG_SERCOMM_CONSOLE=n

-CONFIG_DISABLE_ENVIRON=y

+CONFIG_DISABLE_ENVIRON=n

+CONFIG_STDIO_LINE_BUFFER=y

}}}

And then remove the following lines from nuttx/Make.defs:

{{{

  OSMODIR                 = $(TOPDIR)/../../osmocom-bb

  EXTRA_LIBS              = $(OSMODIR)/src/target/firmware/comm/libcomm.a \

                            $(OSMODIR)/src/shared/libosmocore/build-target/src/.libs/libosmocore.a \

                            $(OSMODIR)/src/target/firmware/calypso/libcalypso.a \

                            $(OSMODIR)/src/target/firmware/comm/libcomm.a

                          # ^^^ Stupid hack! Why do I have to put it twice???

}}}

Compile NuttX:

{{{

$ cd nuttx

$ make

}}}

Load nuttx.bin into Motorola C155, because nuttx.bin is bigger than 64k, you should load chainload.compalram.bin together, use this command:

{{{

./osmocom-bb/src/host/osmocon/osmocon -p /dev/ttyUSB0 -m c155 /osmocom-bb/src/target/firmware/board/compal_e99/chainload.compalram.bin -c nuttx.bin

}}}