Add metta send/receive status line

Birds don't blink (not used for metta send/receive status)

talismetta/talismetta.ino

 #define YOURBIRD_X 53
 #define YOURBIRD_Y 5
 
-
+#define STATUS_SEND_MILLIS 1000
+#define STATUS_RECEIVE_MILLIS 1058 // 2X23X23 to make things resonate
+#define STATUS_COLOR TFT_SKYBLUE
 
 #define SEND_INTERVAL 3000
 unsigned long next_send = 0;
 };
 
 frameType frames[NUM_FRAMES] = {
-  FRAME_ME, FRAME_US, FRAME_U,
-  FRAME_U, FRAME_US, FRAME_U,
-  FRAME_U, FRAME_US, FRAME_ME
+  FRAME_ME, FRAME_ME, FRAME_US, 
+  FRAME_U, FRAME_U, FRAME_US, 
+  FRAME_US, FRAME_US, FRAME_US
 };
 
 const unsigned short *frame2image(frameType frame, bool is_salam, bool metta_from_me, bool metta_from_you) {
 TFT_eSprite rightSprite = TFT_eSprite(&tft);
 TFT_eSprite mybirdSprite = TFT_eSprite(&tft);
 TFT_eSprite yourbirdSprite = TFT_eSprite(&tft);
+TFT_eSprite statusSprite = TFT_eSprite(&tft);
 
 
 // lifted from MacAddress.c
   yourbirdSprite.createSprite(YOURBIRD_WIDTH, YOURBIRD_HEIGHT);
   yourbirdSprite.setSwapBytes(true);
   yourbirdSprite.pushImage(0, 0, YOURBIRD_WIDTH, YOURBIRD_HEIGHT, yourbird);
+
+  statusSprite.createSprite(240, 18);
+  statusSprite.setSwapBytes(true);
 }
 
 void do_scroll(const unsigned short *left_image, const unsigned short *right_image, unsigned long start_time, unsigned long freeze_duration, unsigned long scroll_duration, bool is_reverse) {
   }
 }
 
+void do_status(bool is_send) {
+  unsigned long cycle = is_send ? STATUS_SEND_MILLIS : STATUS_RECEIVE_MILLIS;
+  float quotient = float(millis() % cycle) / cycle;
+  if (!is_send) {
+    quotient = 1.0 - quotient;
+  }
+  int32_t r_in = 130 * quotient; // a bit larger than 240/2
+  int32_t r_out = 130 * pow(quotient, 0.75); // grows faster
+
+  statusSprite.fillSprite(TFT_BLACK);
+  statusSprite.fillEllipse(120, 9, r_out, 10, STATUS_COLOR);
+  statusSprite.fillEllipse(120, 9, r_in, 10, TFT_BLACK);
+  statusSprite.pushToSprite(&background, 0, 116, TFT_BLACK);
+}
+
 void loop() {
   unsigned long nowmillis = millis();
   if (digitalRead(BUTTON1PIN) == LOW) {
     0, 0, 240, 135,
     frame2image(frames[current_frame], is_salam, metta_from_me_since, metta_from_you));
 
-  // mybird (steady, pulse if metta_from_me_Since)
-  if (!metta_from_me_since || frames[current_frame] == FRAME_ME) {
+  // mybird (always on)
+  if (true /* !metta_from_me_since || frames[current_frame] == FRAME_ME || frames[current_frame] == FRAME_US */) {
     mybirdSprite.pushToSprite(&background, MYBIRD_X, MYBIRD_Y, TFT_BLACK);
   }
 
-  // yourbird (steady if nearby, heart beat if metta_from_you)
-  if (nearby && (!metta_from_you || frames[current_frame] == FRAME_U)) {
+  // yourbird (if nearby)
+  if (nearby /* && (!metta_from_you || frames[current_frame] == FRAME_U || frames[current_frame] == FRAME_US) */) {
     yourbirdSprite.pushToSprite(&background, YOURBIRD_X, YOURBIRD_Y, TFT_BLACK);
   }
 
+  // "send" status
+  if (metta_from_me_since) {
+    do_status(true);
+  }
+
+  // "receive" status
+  if (metta_from_you) {
+    do_status(false);
+  }
 
   // Scroll overlays
   if (outro_start) { // Outro scroll overlay