morse code interpretation

Firmware/src/main.c

@@ -29,7 +29,46 @@
 		while (((PINA)&0x08))  \
 			;                  \
 	}
-
+static const char *alpha[] = {
+    ".-",   //A
+    "-...", //B
+    "-.-.", //C
+    "-..",  //D
+    ".",    //E
+    "..-.", //F
+    "--.",  //G
+    "....", //H
+    "..",   //I
+    ".---", //J
+    "-.-",  //K
+    ".-..", //L
+    "--",   //M
+    "-.",   //N
+    "---",  //O
+    ".--.", //P
+    "--.-", //Q
+    ".-.",  //R
+    "...",  //S
+    "-",    //T
+    "..-",  //U
+    "...-", //V
+    ".--",  //W
+    "-..-", //X
+    "-.--", //Y
+    "--..", //Z
+};
+static const char *num[] = {
+    "-----", //0
+    ".----", //1
+    "..---", //2
+    "...--", //3
+    "....-", //4
+    ".....", //5
+    "-....", //6
+    "--...", //7
+    "---..", //8
+    "----.", //9
+    };//stackoverflow.com
 /* clang-format off */ 
 const uint8_t PROGMEM emg_logo[640] =
 {
@@ -138,25 +177,47 @@ int main(void)
         uint32_t counter = 0;
         uint8_t button_state = 1;
         uint8_t button_state_old = 1;
+	char inputstring[6];
+        memset(inputstring, 0, sizeof(inputstring));                 
 	while (1){
         button_state = !(PINA & 0x08);
 
         if( button_state == 1 && button_state_old == 0 ){
             _delay_ms(20);
+            if( counter>=2000 ){
+                for( uint8_t i = 0; i <26; i++){
+                    int a = strcmp(alpha[i], inputstring);       
+                    if(a == 0){
+                        LCD_PutChar("\t"); 
+                        LCD_PutChar(65+i); 
+                    }
+                }
+                //LCD_PutString("\t"); 
+                //LCD_PutString(inputstring);	
+                LCD_PutString("\r\n");
+                //LCD_Clear();
+                memset(inputstring, 0, sizeof(inputstring));             
+            }
             counter = 0;
         }
         if( button_state == 0 && button_state_old == 1 ){
             _delay_ms(20);
-
             /* print to LCD */
-            LCD_Clear();
+            //LCD_Clear();
-            LCD_GotoXY(0, 0);
+            //LCD_GotoXY(0, 0);
-            char msg[20];
+            //char msg[20];
-            sprintf(msg, "time: %d", counter);
+            //sprintf(msg, "time: %d", counter);
-            LCD_PutString(msg);
+            if(counter<500 && counter>=1){
+                LCD_PutString("."); 
+                strcat(inputstring, ".");
+            }
+            else if (counter>=500 && counter<1500){
+                LCD_PutString("-");
+                strcat(inputstring, "-");
+            }
+            //LCD_PutString(msg);
             LCD_Update();
             /* ------------ */	
-
             counter = 0;
         }