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Basic support for GPIOs 0-15.

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Start new 'core' component for low-level parts

Progress towards #8
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Angus Gratton 2015-06-05 11:46:25 +10:00
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@ -59,6 +59,15 @@ Some binary libraries appear to contain unattributed open source code:
* libnet80211.a & libwpa.a appear to be based on FreeBSD net80211/wpa, or forks of them. ([See this issue](https://github.com/SuperHouse/esp-open-rtos/issues/4)).
* libudhcp has been removed from esp-open-rtos. It was released with the Espressif RTOS SDK but udhcp is GPL licensed.
## Code Structure
* `examples` contains a range of example projects (one per subdirectory). Check them out!
* `include` contains header files from Espressif RTOS SDK, relating to the binary libraries & Xtensa core.
* `core` contains source & headers for low-level ESP8266 functions & peripherals. `core/include/esp` contains useful headers for peripheral access, etc. Still being fleshed out. Minimal to no FreeRTOS dependencies.
* `FreeRTOS` contains FreeRTOS implementation, subdirectory structure is the standard FreeRTOS structure. `FreeRTOS/source/portable/esp8266/` contains the ESP8266 port.
* `lwip` and `axtls` contain the lwIP TCP/IP library and the axTLS TLS library ('libssl' in the esp8266 SDKs), respectively. See [Third Party Libraries](https://github.com/SuperHouse/esp-open-rtos/wiki/Third-Party-Libraries) wiki page for details.
## Licensing
* BSD license (as described in LICENSE) applies to original source files, [lwIP](http://lwip.wikia.com/wiki/LwIP_Wiki), and [axTLS](http://axtls.sourceforge.net/). lwIP is Copyright (C) Swedish Institute of Computer Science. axTLS is Copyright (C) Cameron Rich.