1 files changed, 70 insertions, 7 deletions

diff --git a/src/testapp1/main.c b/src/testapp1/main.c
index b305372..117551a 100644
--- a/src/testapp1/main.c
+++ b/src/testapp1/main.c
@@ -6,18 +6,45 @@
 #include "delay.h"
 #include "morse.h"
 
-
+/* Definitions for pins */
 #define PORTB_PTT (1 << 0)
+#define PORTB_SYNCn (1 << 2)
 #define PORTB_LED (1 << 4)
 
-volatile uint8_t Timer;        /* Timer (100Hz increment) */
+/* Specify ID here */
+static const uint8_t renard_id = 0;
+
+static const uint8_t num_renards_cycle = 4;
+// colon (:) represents ERROR
+static const char letters[] = "eish:";
+static const char unique_letter = letters[renard_id];
+
+volatile uint8_t reset_time;
+volatile uint8_t systick;        /* Timer (100Hz increment) */
+volatile uint8_t seconds;
+volatile uint16_t minutes;
 
 /*---------------------------------------------------------*/
 /* 100Hz timer interrupt generated by OC2                  */
 /*---------------------------------------------------------*/
 ISR(TIMER1_COMPA_vect)
 {
-    Timer++;
+    systick++;
+    if (systick == 10) {
+        systick = 0;
+        seconds += 1;
+    }
+
+    if (seconds == 60) {
+        seconds = 0;
+        minutes++;
+    }
+
+    if (reset_time) {
+        reset_time = 0;
+        seconds = 0;
+        minutes = 0;
+    }
 }
 
 static int inittimer(void)
@@ -76,6 +103,11 @@ void dit(void)
 
 int main(void)
 {
+    systick = 0;
+    seconds = 0;
+    minutes = 0;
+    reset_time = 0;
+
     /* Enable PTT output on PB0 */
 #if PTT_LOGIC_LOW
     PORTB = PORTB_PTT;
@@ -86,14 +118,45 @@ int main(void)
     /* initialise timer interrupt */
     inittimer();
 
+    static char *morse_string = "MO ";
+    morse_string[2] = unique_letter;
+
+    const int permanent = (unique_letter == ':');
+
     delay_ms(12*DIT_DURATION);
-    morse("HB9EGM");
+    morse("HB9HI");
     delay_ms(12*DIT_DURATION);
 
     while (1) {
-        // morse code !
-        morse("MOH");
-        delay_ms(6*DIT_DURATION);
+        if ((PINB & PORTB_SYNCn) == 0) {
+            reset_time = 1;
+        }
+
+        if (permanent) {
+            morse(morse_string);
+            delay_ms(6*DIT_DURATION);
+        }
+        else if (minutes >= 10) { // see README.md
+            /* renard id 0: start at (k * num_renards_cycle) * 60, end at (k * num_renards_cycle) * 60 + 55 */
+            const int in_timeslot = (minutes % num_renards_cycle) == renard_id;
+
+            if (in_timeslot && seconds < 55) {
+                morse(morse_string);
+                delay_ms(6*DIT_DURATION);
+            }
+            else {
+                delay_ms(DIT_DURATION);
+            }
+        }
+        else {
+            /* renard id 0: start every 30s, with an additional 2s offset depending on renard_id */
+            const uint32_t second_offset = seconds % 30;
+
+            if (second_offset == 2 * renard_id) {
+                morse_char(unique_letter);
+                delay_ms(1000); // avoid retrigger in same second
+            }
+        }
     }
 
     return 0;