Revision 106:1b09dd92c3f1, committed 2016-02-25

Comitter:

gelmes

Date:

Thu Feb 25 17:17:04 2016 +0000

Parent:

105:d7ee57473fdb

Commit message:

Simple Color Changing LED. USER_MODE button used as input to switch LED animation state. Simple Button press state machine used.

Changed in this revision

diff -r d7ee57473fdb -r 1b09dd92c3f1 main.cpp
--- a/main.cpp	Thu Feb 25 16:54:54 2016 +0000
+++ b/main.cpp	Thu Feb 25 17:17:04 2016 +0000
@@ -13,14 +13,23 @@
 Color blue(0.0f,0.0f,1.0f);
 Color purple(1.0f,0.0f,1.0f);
 
+//PWM pins used D12, D11, D10
 PwmOut   ledr(D12);
 PwmOut   ledg(D11);
 PwmOut   ledb(D10);
 DigitalIn btn(USER_BUTTON);
 DigitalOut led(LED1);
 
-int state = 0;
+int state = 0; //State of the button animation
+
+/** Fades LED from one value to the next to calculate animation time
+    multiply steps by stepTime
 
+    @param start Starting clor
+    @param finish Ending color
+    @param step Steps to take to get to color
+    @param setTime Time taken by each step
+ */
 bool fadeTo(Color start, Color finish, float steps, double stepTime)
 {
     float rSteps = (finish.r - start.r)/steps;
@@ -49,6 +58,12 @@
     return 1;
 }
 
+/** Fades LED through all standard colors (black, red, yellow, green, teal, blue, purple)
+    to calculate animation time multiply steps by stepTime by 7
+
+    @param steps Number of steps to take
+    @param stepTime Time taken by each step
+ */
 void fadeThruAll(float steps, float stepTime)
 {
     bool cont = 1;
@@ -61,6 +76,11 @@
     if(cont) cont = fadeTo(purple, black, steps, stepTime);
 }
 
+
+/** This is the thread used for controlling the LED rendering state. This state
+    is modified by the btnPresses process through the use of the state global
+    variable.
+*/
 void renderColors(void const * arg)
 {
     while (1) {
@@ -82,6 +102,13 @@
 }
 
 enum SMBtnStates {SMBtnStart, SMBtnPressedOff, SMBtnUnpressedOff, SMBtnPressedOn, SMBtnUnpressedOn} SMBtnState;
+/** This is the thread used to gather button presses information. This is a simple State machine of a button
+    press.
+     ___________      _______________
+    |           |    |               |
+    |SMBtn Start| -> |SMBtnPressedOFF|
+    |___________|    |_______________|
+*/
 void btnPresses(void const * arg)
 {
     while(1) {
@@ -133,6 +160,8 @@
     }
 }
 
+/** Main thread control
+*/
 int main()
 {
     Thread thread1(renderColors);