NuttX guides

[jfm92]

We could use this issue to have organized, the development and problem-solving guides.If someone develop some guide I could add to this first message to have more visibility.

Development Guides:

How to register a NuttX general driver in a STM32 board -> #3
How to develop a driver in NuttX -> #9
How to develop an App in Nuttx -> #12 .
How to use serial communication in NuttX -> #10
How to use I2C in NuttX -> #11
How to use SPI in NuttX -> #29
How to use on board Ethernet in NuttX -> #13
How to active/port new features to your board -> #14
How to use an UDP Server/Client over 6LowPan in NuttX -> #23
How to use ADC in NuttX -> #24
How to use the SD card reader in NuttX (This version is only for the Olimex Board)-> #25
Add an external library -> #28

Problem solving:

How to enable the device registration on Olimex-STM32-E407 -> #5
Necessary modifications in Nuttx for Olimex-STM32-E407 to allow external drivers -> #4

Pin configurations of each boards

Olimex-STM32-E407 -> #6
STM32L1 Discovery Kit -> #7
Hercules LaunchXL-TMS57004 -> #8

What do you need to program and use each board:

Olimex-STM32-E407 -> #16
STM32L1 Discovery Kit -> #17
Hercules LaunchXL-TMS57004 -> #18