simplify startup display pattern, extend default timeout

.hgtags

@@ -1 +1,2 @@
 b4caefc05db1ac8c142e4427a59d7771e3ae1d38 WORKS_1
+78b8b97f294d32c8d383ece023b32cd8076805f0 WORKS_2

src/display.c

@@ -55,15 +55,9 @@ uint8_t digitValues[] = { EMPTY_ID, EMPTY_ID, EMPTY_ID };
 
 
 void displayInit(void *handleArg) {
-  for (tPin d = DIGIT_0; d <= DIGIT_2; d++) {
-    gpioSetPin(d, LOW);
   for (tPin s = SEG_A; s <= SEG_F; s++) {
-      gpioSetPin(s, HIGH);
-      ms_active_delay(INIT_CYCLE_DELAY);
     gpioSetPin(s, LOW);
   }
-    gpioSetPin(d, HIGH);
-  }
   for (tPin d = DIGIT_2; d >= DIGIT_0; d--) {
     gpioSetPin(d, LOW);
     gpioSetPin(SEG_G, HIGH);

src/main.c

@@ -41,7 +41,7 @@ int main() {
   timeInit();
   schInit();
 
-  schAdd(powerDown, NULL, 600000, 0);
+  schAdd(powerDown, NULL, 1800000, 0);   // default thermometer power down timeout: 30min
 
   // interrupts are required for delay function in displayInit();
   __enable_interrupt();