Change requset type parameter back to uint8_t (fix type cast), support USB indicator pulse

examples/device/usbtmc/src/main.c

@@ -36,12 +36,12 @@
 
 /* Blink pattern
  * - 250 ms  : device not mounted
- * - 1000 ms : device mounted
+ * - 0 ms : device mounted
  * - 2500 ms : device is suspended
  */
 enum  {
   BLINK_NOT_MOUNTED = 250,
-  BLINK_MOUNTED = 1000,
+  BLINK_MOUNTED = 0,
   BLINK_SUSPENDED = 2500,
 };
 
@@ -97,17 +97,46 @@ void tud_resume_cb(void)
 }
 
 //--------------------------------------------------------------------+
-// BLINKING TASK
+// BLINKING TASK + Indicator pulse
 //--------------------------------------------------------------------+
+
+
+volatile uint8_t doPulse = false;
+// called from USB context
+void led_indicator_pulse(void) {
+	doPulse = true;
+}
+
 void led_blinking_task(void)
 {
   static uint32_t start_ms = 0;
   static bool led_state = false;
+  if(blink_interval_ms == BLINK_MOUNTED) // Mounted
+  {
+    if(doPulse)
+    {
+      led_state = true;
+      board_led_write(true);
+      start_ms = board_millis();
+      doPulse = false;
+    }
+    else if (led_state == true)
+    {
+      if ( board_millis() - start_ms < 750) //Spec says blink must be between 500 and 1000 ms.
+      {
+        return; // not enough time
+      }
+      led_state = false;
+      board_led_write(false);
+    }
+  }
+  else
+  {
+    // Blink every interval ms
+    if ( board_millis() - start_ms < blink_interval_ms) return; // not enough time
+    start_ms += blink_interval_ms;
 
-  // Blink every interval ms
-  if ( board_millis() - start_ms < blink_interval_ms) return; // not enough time
-  start_ms += blink_interval_ms;
-
-  board_led_write(led_state);
-  led_state = 1 - led_state; // toggle
+    board_led_write(led_state);
+    led_state = 1 - led_state; // toggle
+  }
 }