Diff: main.cpp

Revision:

3:7486869c8027

Child:

4:1790aa9234a3

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Tue Mar 31 19:50:37 2020 +0000
@@ -0,0 +1,105 @@
+#include "mbed.h"
+
+DigitalOut myled(LED1);
+// States 
+#define RESET 1
+#define STOP 2
+#define RECORD 3
+#define PLAY 4
+#define ERASE 5
+//  State Machine control global variables
+bool X;     //reset
+bool P;     //play
+bool S;     //stop
+bool R;     //record
+bool E;     //erase
+
+enum sm_state {sRESET,sSTOP,sRECORD,sPLAY,sERASE};
+
+
+void reset(){ 
+    /* reset state:
+        Initial state upon powering up the device
+        1. Cease all motion
+        2. Reset all motors to initial position
+        3. Mutes all audio
+        4. Goes to erase state if reset button is held down for at least 3 seconds
+        5. Goes to stop state according to rotary switch input
+        6. LED goes from green to red
+        NOTE: ONLY exits to stop or erase state 
+    */
+}
+void stop(){
+    /* stop state:
+        Initiated by rotary switch
+        1. Cease all motion
+        2. Stop recording
+        3. Mute all audio
+    */
+}
+void record(){
+    /* record state:
+        Initiated by rotary switch
+        1. Cease all motion
+        2. Begin recording ToF inputs (distance and time)
+        3. Convert distances to corresponding audio frequencies
+        4. Append to list of frequencies
+        5. 
+    */
+}
+void play(){
+    /* play state:
+        Initiated by rotary switch
+        1. wait a few seconds
+        2. begin reading list of frequencies while concurrently:
+            - moving servo motors accordingly
+            - playing corresponding sounds
+    */
+}
+void erase(){
+    /* erase state:
+        erases entire audio recording
+    */
+}
+
+int main() {
+    sm_state curr_state =  sRESET;
+    while(1) {
+        switch(curr_state){
+            case sRESET:
+                if(S) curr_state = sSTOP;
+                break;
+            case sSTOP:
+                if(X){
+                    curr_state = sRESET;
+                }else if(S&R){
+                    curr_state = sRECORD;
+                }else if(S&P){
+                    curr_state = sPLAY;
+                }
+                break;
+            case sRECORD:
+                if(X){
+                    curr_state = sRESET;
+                }else if(R&S){
+                    curr_state = sSTOP;
+                }else if(R&P){
+                    curr_state = sPLAY;
+                }
+                break;
+            case sPLAY:
+                if(X){
+                    curr_state = sRESET;
+                }else if(P&S){
+                    curr_state = sSTOP;
+                }else if(P&R){
+                    curr_state = sPLAY;
+                }
+                break;
+            case sERASE:
+                if(X){
+                    curr_state = sRESET;
+                }
+        }
+    }
+}