README.txt
^^^^^^^^^^
This is the README file for the NuttX port to the ZiLog ZNEO MCU.
ZDS-II Compiler Versions
^^^^^^^^^^^^^^^^^^^^^^^^
4.10.2
The ZDS-II version 4.10.2 will not compile NuttX. It reports "internal
errors" on some of the files. Upgrades to ZDS-II are available for
download from the Zilog website: http://www.zilog.com/software/zds2.asp
4.11.0
NuttX compiles correctly with the newer 4.11.0 version of the ZDS-II
toolchain. However, I have found a few issues:
- The code will not run without the -reduceopt option. There is,
apparently, some optimization related issue. This issue has not
been analyzed as of this writing.
- Not all NuttX logic will not run with the -regvars option. There is
at least one failure that has been reported to ZiLOG as incident 81400.
- The Pascal add-on interpreter includes a large switch statement and
exposes another compiler problem. This is reported as incident 81459.
4.11.1
As of this writing (30 September 2010), the latest release of ZDS-II for the
ZNEO is 4.11.1. It is unknown if this release includes fixes for incidents
81400 and 81459 or not. It is unknown if the code will run without -reduceopt
either. (Basically, it compiles with 4.11.1, but is untested with that version).
If you use any version of ZDS-II other than 4.11.1 or if you install ZDS-II
at any location other than the default location, you will have to modify
two files: (1) configs/z16f2800100zcog/*/setenv.sh and (2)
configs/z16f2800100zcog/*/Make.defs. Simply edit these two files, changing
4.11.1 to whatever.
Issues
^^^^^^
There are several, important open issues with the ZNEO port (8 as of this writing).
See the TODO file in the top-level NuttX directory. One of these should be
mentioned here because it causes a failure to compile Nuttx:
Description: The file drivers/mmcsd/mmcsd_sdio.c generates an internal compiler
error like:
mmcsd\mmcsd_sdio.c
Internal Error(0503) On line 2524 of "MMCSD\MMCSD_SDIO.C"
File <c3>, Args(562,46)
Status: Open. Recommended workaround: remove mmcsd_sdio.c from
drivers/mmcsd/Make.defs. There is no SDIO support for the Z16 anyway
Priority: Low
This is bug in ZDS-II. It was discovered in version 4.11.0 and still exists
in version 4.11.1.
Configuration Subdirectories
^^^^^^^^^^^^^^^^^^^^^^^^^^^^
- source/ and include/
These directories contain common logic for all z16f2800100zcog
configurations.
Variations on the basic z8f162800100zcog configuration are maintained
in subdirectories. To configure any specific configuration, do the
following steps:
cd <nuttx-top-directory>/tools
./configure.sh z16f2800100zcog/<sub-directory>
cd <nuttx-top-directory>
make
Where <sub-directory> is the specific board configuration that you
wish to build. The following board-specific configurations are
available:
- ostest
This builds the examples/ostest application for execution from FLASH.
See examples/README.txt for information about ostest.
- pashello
Configures to use examples/pashello for execution from FLASH
See examples/README.txt for information about pashello.
Check out any README.txt files in these <sub-directory>s.
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