Case study Embedded System Design
finished
Dependencies: C12832 DebouncedInterrupt MMA7660 mbed-rtos mbed
Revision 0:151f0dbf3ca8, committed 2015-02-26
- Comitter:
- cathal66
- Date:
- Thu Feb 26 15:00:42 2015 +0000
- Child:
- 1:57407e283b03
- Commit message:
- fixed problem with push button
Changed in this revision
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/C12832.lib Thu Feb 26 15:00:42 2015 +0000 @@ -0,0 +1,1 @@ +https://mbed.org/users/chris/code/C12832/#7de323fa46fe
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/LM75B.lib Thu Feb 26 15:00:42 2015 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/neilt6/code/LM75B/#fc27dc535ea9
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Thu Feb 26 15:00:42 2015 +0000
@@ -0,0 +1,244 @@
+#include "mbed.h"
+#include "rtos.h"
+#include "C12832.h"
+
+//FINITE STATE MACHINE EVENTS
+#define NO_EVENT 0
+#define TIME_OUT 1
+#define BUTTON_PRESS 2
+
+//STATES
+#define STATE_0 0
+#define STATE_1 1
+#define STATE_2 2
+#define STATE_3 3
+#define STATE_4 4
+#define STATE_5 5
+
+//pass event via message queue
+typedef struct {
+ int event; /* AD result of measured voltage */
+} message_t;
+
+MemoryPool<message_t, 16> mpool;
+Queue<message_t, 16> queue;
+
+//button plus local display
+DigitalIn coin(p14);
+
+C12832 lcd(p5, p7, p6, p8, p11);
+
+//leds for debug
+DigitalOut led_R(p23); //LED RGB red
+DigitalOut led_G(p24); //LED RGB green
+
+DigitalOut led4(LED4); //LED RGB green
+DigitalOut led3(LED3); //LED RGB green
+
+
+void timeout_event(void const *n)
+{
+ //generate local display info
+ lcd.cls();
+ lcd.locate(40,5);
+ lcd.printf("timeout event");
+
+
+ //event via a message queue
+ message_t *message = mpool.alloc();
+ message->event = TIME_OUT;
+ queue.put(message);
+
+ led4 = !led4;
+
+}
+
+
+void button_event_thread(void const *argument) {
+ int button_press=0;
+ while (true) {
+
+ //debouce delay for switch
+
+ if (coin)
+ {
+ button_press = 1;
+ if (button_press == 1 & coin == 0)
+ {
+
+ lcd.cls();
+ lcd.locate(0,1);
+ lcd.printf("button event");
+
+
+ //event via a message queue
+ message_t *message = mpool.alloc();
+ message->event = BUTTON_PRESS;
+ queue.put(message);
+
+ led3 = !led3;
+ button_press = 0;
+ }
+ }
+ else
+ {
+ //button_press = coin;
+ //Thread::wait(100);
+ }
+ }
+}
+
+
+int main (void) {
+
+//Thread fsm(fsm_thread);
+Thread button_event(button_event_thread);
+RtosTimer timer(timeout_event, osTimerPeriodic, (void *)0);
+
+int state = STATE_0;
+
+
+ //start timer with a 2 sec timeout
+ timer.start(2000);
+
+ while (true) {
+ switch(state)
+ {
+ case STATE_0:
+ lcd.cls();
+ lcd.locate(0,2);
+ lcd.printf("FSM START");
+
+ osEvent evt = queue.get();
+ if (evt.status == osEventMessage)
+ {
+ message_t *message = (message_t*)evt.value.p;
+
+
+ if(message->event == BUTTON_PRESS) state = STATE_1;
+ if(message->event == TIME_OUT) state = STATE_0;
+
+ mpool.free(message);
+ }
+
+ timer.start(2000);
+
+ break;
+
+ case STATE_1:
+ lcd.cls();
+ lcd.locate(0,2);
+ lcd.printf("FSM COUNTER 1");
+
+ evt = queue.get();
+ if (evt.status == osEventMessage)
+ {
+ message_t *message = (message_t*)evt.value.p;
+
+
+ if(message->event == BUTTON_PRESS) state = STATE_2;
+ if(message->event == TIME_OUT) state = STATE_0;
+
+ mpool.free(message);
+ }
+
+
+ timer.start(2000);
+
+ break;
+
+ case STATE_2:
+ lcd.cls();
+ lcd.locate(0,2);
+ lcd.printf("FSM COUNTER 2");
+
+ evt = queue.get();
+ if (evt.status == osEventMessage)
+ {
+ message_t *message = (message_t*)evt.value.p;
+
+
+ if(message->event == BUTTON_PRESS) state = STATE_3;
+ if(message->event == TIME_OUT) state = STATE_1;
+
+ mpool.free(message);
+ }
+
+ timer.start(2000);
+
+ break;
+
+ case STATE_3:
+ lcd.cls();
+ lcd.locate(0,2);
+ lcd.printf("FSM COUNTER 3");
+
+ evt = queue.get();
+ if (evt.status == osEventMessage)
+ {
+ message_t *message = (message_t*)evt.value.p;
+
+
+ if(message->event == BUTTON_PRESS) state = STATE_4;
+ if(message->event == TIME_OUT) state = STATE_2;
+
+ mpool.free(message);
+ }
+
+
+ timer.start(2000);
+
+ break;
+
+ case STATE_4:
+ lcd.cls();
+ lcd.locate(0,2);
+ lcd.printf("FSM COUNTER 4");
+
+ evt = queue.get();
+ if (evt.status == osEventMessage)
+ {
+ message_t *message = (message_t*)evt.value.p;
+
+
+ if(message->event == BUTTON_PRESS) state = STATE_5;
+ if(message->event == TIME_OUT) state = STATE_3;
+
+ mpool.free(message);
+ }
+
+ timer.start(2000);
+
+ break;
+
+ case STATE_5:
+ lcd.cls();
+ lcd.locate(0,2);
+ lcd.printf("FSM COUNTER 5");
+
+ evt = queue.get();
+ if (evt.status == osEventMessage)
+ {
+ message_t *message = (message_t*)evt.value.p;
+
+
+ if(message->event == BUTTON_PRESS) state = STATE_5;
+ if(message->event == TIME_OUT) state = STATE_4;
+
+ mpool.free(message);
+ }
+
+
+
+ timer.start(2000);
+
+ break;
+ }//End of switch
+
+ //toggle led for local testing
+ //led2= !led2;
+
+ }//end of while(1)
+
+
+}
\ No newline at end of file
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed-rtos.lib Thu Feb 26 15:00:42 2015 +0000 @@ -0,0 +1,1 @@ +https://mbed.org/users/mbed_official/code/mbed-rtos/#5448826aa700
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Thu Feb 26 15:00:42 2015 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/9ad691361fac \ No newline at end of file