History

Jesus Sanchez-Palencia 595088be09 galileo: Add a bootstrap stack for C runtime All we need to provide to C at this point is a region in memory dedicated to its stack. This is done by allocating a region in .bss and pushing its start address to esp. Since the multiboot spec says it is not safe to rely on the initial stack provided by the bootloader, this patch provides our own stack. Galileo boards have 512Kb of SRAM and 256Mb of DDR3 RAM, so providing 8kb as a start seems safe. Moreover, stack sizes are very application-oriented so it may be too early to provide a bigger (or smaller) stack.		2015-12-21 08:06:14 -02:00
..
bsp	galileo: Add 'debug' rule	2015-12-21 08:06:14 -02:00
contiki-conf.h	galileo: Initial support for Intel Galileo Platform	2015-12-21 08:06:14 -02:00
contiki-main.c	galileo: Initial support for Intel Galileo Platform	2015-12-21 08:06:14 -02:00
galileo.ld	galileo: Initial support for Intel Galileo Platform	2015-12-21 08:06:14 -02:00
loader.S	galileo: Add a bootstrap stack for C runtime	2015-12-21 08:06:14 -02:00
Makefile.customrules-galileo	galileo: Print elf sections sizes after build	2015-12-21 08:06:14 -02:00
Makefile.galileo	galileo: Initial support for Intel Galileo Platform	2015-12-21 08:06:14 -02:00
newlib-syscalls.c	galileo: Initial support for Intel Galileo Platform	2015-12-21 08:06:14 -02:00
README.md	galileo: Add README file	2015-12-21 08:06:14 -02:00
rtimer-arch.h	galileo: Initial support for Intel Galileo Platform	2015-12-21 08:06:14 -02:00

README.md

Intel Galileo Board

This README file contains general information about the Intel Galileo board support. In the following lines you will find information about supported features as well as instructions on how to build, run and debug applications for this platform. The instructions were only test in Linux environment.

Requirements

In order to build and debug the following packages must be installed in your system:

gcc
gdb
openocd

Moreover, in order to debug via JTAG or serial console, you will some extra devices as described in [1] and [2].

Features

This section presents the features currently supported (e.g. device drivers and Contiki APIs) by the Galileo port.

For now, no features are supported.

Building

To build applications for this platform you should first build newlib (in case it wasn't already built). To build newlib you can run the following command:

$ ./platform/galileo/bsp/libc/build_newlib.sh

Once newlib is built, you are ready to build applications. To build applications for Galileo platform you should set TARGET variable to 'galileo'. For instance, building the hello-world application should look like this:

$ cd examples/hello-world/ && make TARGET=galileo

This will generate the 'hello-world.galileo' file which is a multiboot- compliant [3] ELF image. In order to boot the Contiki image, you will need a multiboot-compliant bootloader. In the bsp directory, we provide a helper script which builds the Grub bootloader with multiboot support. To build the bootloader, just run the following command:

$ platform/galileo/bsp/grub/build_grub.sh

Running

So to run Contiki applications in Galileo, we have three main steps: prepare SDcard, connect to console, and boot image. Below follows detailed instructions.

Prepare SDcard

Mount the sdcard in directory /mnt/sdcard.

Copy Contiki binary image to sdcard

$ cp examples/hello-world/hello-world.galileo /mnt/sdcard

Copy grub binary to sdcard

$ cp platform/galileo/bsp/grub/bin/grub.efi /mnt/sdcard

Connect to the console output

Connect the serial cable to your computer as showed in [2].

Choose one terminal emulator such as screen, putty or minicom. Make sure you use keyboard SCO mode (on putty that option is at Terminal -> Keyboard, on the left menu). Connect to /dev/ttyUSB0, use 115200 speed.

Boot Contiki Image

Turn on your board. After a few seconds you should see the following text in the screen:

Press [Enter] to directly boot.
Press [F7]    to show boot menu options.

Press and select the option "UEFI Internal Shell" within the menu. Once you have a shell, run the following commands to run grub application:

$ fs0:
$ grub.efi

You'll reach de grub shell. Now run the following commands to boot Contiki image:

$ multiboot /hello-world.galileo
$ boot

For now, we lack of UART support so you won't see any output. However, you can use JTAG (see next section) to verify that the Contiki is running.

Debugging

This section describes how to debug Contiki via JTAG. The following instructions consider you have the devices: Flyswatter2 and ARM-JTAG-20-10 adapter (see [1]).

Attach the Flyswatter2 to your host computer with an USB cable. Connect the Flyswatter2 and ARM-JTAG-20-10 adapter using the 20-pins head. Connect the ARM-JTAG-20-10 adapter to Galileo Gen2 JTAG port using the 10-pins head.

Once everything is connected, run Contiki as described in "Running" section, but right after loading Contiki image (multiboot command), run the following command:

$ make TARGET=galileo debug

The 'debug' rule will run OpenOCD and gdb with the right parameters. OpenOCD will run in background and its output will be redirected to a log file in the application's path called LOG_OPENOCD. Once gdb client is detached, OpenOCD is terminated.

If you use a gdb front-end, you can define the "GDB" environment variable and your gdb front-end will be used instead of default gdb. For instance, if you want to use cgdb front-end, just run the command:

$ make BOARD=galileo debug GDB=cgdb

References

[1] https://communities.intel.com/message/211778

[2] http://www.intel.com/support/galileo/sb/CS-035124.htm

[3] https://www.gnu.org/software/grub/manual/multiboot/multiboot.html