Hugo Pristauz / Mbed 2 deprecated T02_SOS

Tutorial 2 - SOS: This is an embedded program which controls LED1 in order to show a blinking SOS pattern. The tutorial starts to organize helper functions like "morse" in a brick library which will grow and grow with each tutorial. Platform specifics are identified in "bricks/platform.h" by setting proper defines (like LED_INVERTED), which are used to achieve platform independent behaviour. The program has been tested on Nordic nRF51-DK and STM NUCLEO-F303K8, NUCLEO-F401RE and NUCLEO-L476RG.

Dependencies:   mbed

Readme.md

Committer:
hux
Date:
2016-12-10
Revision:
1:10299215b49e

File content as of revision 1:10299215b49e:

T02_SOS - Blinking LED according to Morse SOS pattern

This demo program runs a repeated SOS morse pattern on LED1. 
Helper function morse() is implemented as part of the bricks library (files
bricks/blink.cpp, bricks/blink.h and bricks/target.h.

We need a special header target.h with platformtarget specific definitions.
For example on a NUCLEO board LED1 needs to be assigned with a value of 1 for ON
and 0 for OFF. On a nRF51 board it is exactly the oposite. 

In order to achieve opposite behavour the header target.h defines conditionally
the define LED_INVERTED (only if nRF51 platform board is selected), which is
processed in blink.cpp to proper definitions for LED_ON and LED_OFF.

See blink.cpp:

#ifndef LED_INVERTED
#   define LED_ON  1
#   define LED_OFF 0
#else
#   define LED_ON  0
#   define LED_OFF 1
#endif

To make it running the libraries BLE_API and X_NUCLEO_IDB0XA1 have to be
updated (e.g. to be copied from a working NUCLEO BLE program).

Tested Boards:
   NUCLEO-L476RG, NUCLEO-F303K8, NUCLEO-F401RE
   nRF51-DK