Marco Rubio
Example code displaying how to use and implement the mbed RTOS along with a simple state machine used to capture button presses.
Fork of
mbed-rtos
by 
mbed official
Revision 105:d7ee57473fdb, committed 2016-02-25
- Comitter:
- gelmes
- Date:
- Thu Feb 25 16:54:54 2016 +0000
- Parent:
- 104:07314541bd12
- Child:
- 106:1b09dd92c3f1
- Commit message:
- Finished Simple Color Changing LED. Used Push Button State Machine and Created two threads, one for LED pulses and one for Button State Machine.
Changed in this revision
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/color.cpp Thu Feb 25 16:54:54 2016 +0000
@@ -0,0 +1,9 @@
+#include "color.h"
+
+Color::Color(float red, float green, float blue)
+{
+ r = red;
+ g = green;
+ b = blue;
+};
+
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/color.h Thu Feb 25 16:54:54 2016 +0000
@@ -0,0 +1,14 @@
+#ifndef COLOR_H
+#define COLOR_H
+class Color
+{
+public:
+ float r;
+ float g;
+ float b;
+ Color(float red, float green, float blue);
+
+};
+
+
+#endif
\ No newline at end of file
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Thu Feb 25 16:54:54 2016 +0000
@@ -0,0 +1,141 @@
+
+#include "mbed.h"
+#include "rtos.h"
+#include "color.h"
+
+
+//Set Up all basic colors
+Color black(0.0f,0.0f,0.0f);
+Color red(1.0f,0.0f,0.0f);
+Color yellow(1.0f,1.0f,0.0f);
+Color green(0.0f,1.0f,0.0f);
+Color teal(0.0f,1.0f,1.0f);
+Color blue(0.0f,0.0f,1.0f);
+Color purple(1.0f,0.0f,1.0f);
+
+PwmOut ledr(D12);
+PwmOut ledg(D11);
+PwmOut ledb(D10);
+DigitalIn btn(USER_BUTTON);
+DigitalOut led(LED1);
+
+int state = 0;
+
+bool fadeTo(Color start, Color finish, float steps, double stepTime)
+{
+ float rSteps = (finish.r - start.r)/steps;
+ float gSteps = (finish.g - start.g)/steps;
+ float bSteps = (finish.b - start.b)/steps;
+
+ steps = 1/steps;
+
+ float rStepsCounter = 1.0f - start.r;
+ float gStepsCounter = 1.0f - start.g;
+ float bStepsCounter = 1.0f - start.b;
+ int stateBefore = state; //Used as a temporary variable
+ // and print what the measured voltage should be (assuming VCC = 3.3v)
+ for (float i = 0.0f; i < 1.0f; i += steps) {
+ rStepsCounter -= rSteps;
+ gStepsCounter -= gSteps;
+ bStepsCounter -= bSteps;
+
+ ledr = rStepsCounter ;
+ ledg = gStepsCounter;
+ ledb = bStepsCounter;
+
+ Thread::wait(stepTime*1000);
+ if (stateBefore != state) return 0;
+ }
+ return 1;
+}
+
+void fadeThruAll(float steps, float stepTime)
+{
+ bool cont = 1;
+ cont = fadeTo(black, red, steps, stepTime);
+ if(cont) cont = fadeTo(red, yellow, steps, stepTime);
+ if(cont) cont = fadeTo(yellow, green, steps, stepTime);
+ if(cont) cont = fadeTo(green, teal, steps, stepTime);
+ if(cont) cont = fadeTo(teal, blue, steps, stepTime);
+ if(cont) cont = fadeTo(blue, purple, steps, stepTime);
+ if(cont) cont = fadeTo(purple, black, steps, stepTime);
+}
+
+void renderColors(void const * arg)
+{
+ while (1) {
+ switch(state) {
+ case 0:
+ fadeThruAll(100.0f, 0.025f);
+ break;
+ case 1:
+ fadeThruAll(1.0f,0.1f);
+ break;
+ case 2:
+ state = 0;
+ break;
+ default:
+ state = 0;
+ break;
+ }
+ }
+}
+
+enum SMBtnStates {SMBtnStart, SMBtnPressedOff, SMBtnUnpressedOff, SMBtnPressedOn, SMBtnUnpressedOn} SMBtnState;
+void btnPresses(void const * arg)
+{
+ while(1) {
+ switch(SMBtnState) {
+ case SMBtnStart:
+ SMBtnState = SMBtnUnpressedOff;
+ break;
+ case SMBtnUnpressedOff:
+ if(!btn) SMBtnState = SMBtnPressedOn;
+ break;
+ case SMBtnPressedOn:
+ if(btn) {
+ SMBtnState = SMBtnUnpressedOn;
+ state++;
+ led = 1;
+ }
+ break;
+ case SMBtnUnpressedOn:
+ if(!btn) SMBtnState = SMBtnPressedOff;
+ break;
+ case SMBtnPressedOff:
+ if(btn) {
+ SMBtnState = SMBtnUnpressedOff;
+ state++;
+ led = 0;
+ }
+ break;
+ default:
+ SMBtnState = SMBtnStart;
+ break;
+ }
+
+ switch(SMBtnState) {
+ case SMBtnStart:
+ SMBtnState = SMBtnUnpressedOff;
+ break;
+ case SMBtnUnpressedOff:
+ break;
+ case SMBtnPressedOn:
+ break;
+ case SMBtnUnpressedOn:
+ break;
+ case SMBtnPressedOff:
+ break;
+ default:
+ SMBtnState = SMBtnStart;
+ break;
+ }
+ }
+}
+
+int main()
+{
+ Thread thread1(renderColors);
+ Thread thread2(btnPresses);
+ while(true) {};
+}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Thu Feb 25 16:54:54 2016 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/252557024ec3 \ No newline at end of file