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Free and open (as much as possible) integrated SDK for ESP8266 chips
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Andrew Andrianov a62293b698 Create portable toolchain 
This commit adds changes required for the toolchain to be
portable:

* Toolchain built is now static
* All SDK headers are installed into the toolchain itself
* All blobs from SDK are installed into toolchain itself
* Toolchain directory name is its GNU_TARGET_NAME by default

This also removes the need to specify the -L and -I flags
while building the actual software to include SDK libraries

Signed-off-by: Andrew Andrianov <andrew@ncrmnt.org>
2014-11-18 15:15:00 +03:00
crosstool-NG@d30ecd31fb Add crosstool-NG submodule. 2014-11-15 20:19:05 +02:00
esptool@023314cb05 Add esptool submodule. 2014-11-18 01:24:38 +02:00
lx106-hal@90cdf910a8 Add lx106-hal submodule. 2014-11-15 23:14:17 +02:00
.gitmodules Add esptool submodule. 2014-11-18 01:24:38 +02:00
Makefile Create portable toolchain 2014-11-18 15:15:00 +03:00
README Espressif uses code from wpa_supplicant. 2014-11-16 15:03:55 +02:00

README 

This repository provides integration scripts to build complete standalone
SDK (with toolchain) for software development for Espressif ESP8266,
ESP8266EX chips.

Complete SDK consists of:

1. Xtensa lx106 architecture toolchain (100% OpenSource), based on
following projects:

https://github.com/jcmvbkbc/crosstool-NG
https://github.com/jcmvbkbc/gcc-xtensa
https://github.com/jcmvbkbc/newlib-xtensa
https://github.com/tommie/lx106-hal

The sourcecode above originates from work done directly by Tensilica Inc.,
Cadence Design Systems, Inc, or their contractors.

2. ESP8266 IoT SDK from Espressif Systems. This component is only partially
open source, some libraries provided as binary blobs. 

http://bbs.espressif.com/viewforum.php?f=5

OpenSource components of SDK are based on:

lwIP, http://savannah.nongnu.org/projects/lwip/
Contiki, http://www.contiki-os.org/
axTLS, http://axtls.sourceforge.net/
wpa_supplicant, http://w1.fi/wpa_supplicant/ (source withheld by Espressif)


Building
========

To build standalone SDK with toolchain, you need GNU/POSIX system (Linux,
BSD, MacOSX, Windows with Cygwin) with standard GNU development tools
installed, like gcc, binutils, flex, bison, etc. For Debian/Ubuntu
install:

sudo apt-get install make unrar autoconf automake libtool gcc g++ gperf \
    flex bison texinfo gawk ncurses-dev libexpat-dev

To start build process run:

make

This will download all necessary components and compile them. Once done,
the toolchain (with Xtensa HAL library) will be available in toolchain/
directory. Add its bin/ subdirectory to execute "xtensa-lx106-elf-gcc"
and other tools.

ESP8266 SDK will be installed in sdk/, to use it, run the compiler with
corresponding include and lib dir flags:

xtensa-lx106-elf-gcc -I$(THISDIR)/sdk/include -L$(THISDIR)/sdk/lib