comparison examples/basic_blink/render.cpp @ 372:db2fe4e1b88e prerelease

Doxygen content added to each example render.cpp.
References to AnalogReadFrame etc. removed from doxygen content.

+/*
+ ____  _____ _        _    
+| __ )| ____| |      / \   
+|  _ \|  _| | |     / _ \  
+| |_) | |___| |___ / ___ \ 
+|____/|_____|_____/_/   \_\.io
+
+ */
+
+/*
+ *
+ * Andrew McPherson and Victor Zappi
+ * Queen Mary, University of London
+ */
+
+/**
+\example 2_digital_blink
+
+Blinking an LED
+---------------
+
+This sketch shows the simplest case of digital out. 
+
+- Connect an LED in series with a 470ohm resistor between P8_07 and ground. 
+
+The led is blinked on and off by setting the digital pin `HIGH` and `LOW` every interval seconds which is set in 
+`render()`.
+
+In `setup()` the pin mode must be set to output mode via `pinMode()`. For example: 
+`pinMode(context, 0, P8_07, OUTPUT)`. 
+In `render()` the output of the digital pins is set by `digitalWrite()`. For example: 
+`digitalWrite(context, n, P8_07, status)` where `status` can be equal to 
+either `HIGH` or `LOW`. When set `HIGH` the pin will give 3.3V, when set to 
+`LOW` 0V.
+
+To keep track of elapsed time we have a sample counter count. When the count reaches 
+a certain limit it switches state to either `HIGH` or `LOW` depending on its current 
+value. In this case the limit is `context->digitalSampleRate*interval` which 
+allows us to write the desired interval in seconds, stored in `interval`.
+*/
+
 #include <Bela.h>
 #include <Utilities.h>
 #include <cmath>
 #include <rtdk.h>