suppress HID messages when device is disconnected

aw410k.c

@@ -376,12 +376,17 @@ void startADC() {
 
 // forward HID report after processing
 bool forward_report(uint8_t instance, uint8_t const* report, uint16_t len) {
-	// toggle mute button color if mute button is pressed
+	// forward only if device is connected
-	if ( instance == 0x02 && report[0] == 0x02 && (report[2] & 0x01) ) {
+	if (device_state == DEVICE_ACTIVE) {
-		mute = !mute;
+		// toggle mute button color if mute button is pressed
+		if ( instance == 0x02 && report[0] == 0x02 && (report[2] & 0x01) ) {
+			mute = !mute;
+		}
+
+		return tud_hid_n_report(instance, 0, report, len);
 	}
 
-	return tud_hid_n_report(instance, 0, report, len);
+	return true;
 }
 
 // save RGB configuration to flash

usb_device.c

@@ -79,19 +79,17 @@ void usb_device_main(void) {
 	while (true) {
 		switch ( device_state ) {
 			case DEVICE_ACTIVE:
+				if (!tud_mounted()) {
+					device_state = DEVICE_INACTIVE;
+				}
 				break;
 			case DEVICE_INACTIVE:
 				break;
 			case DEVICE_RESTART:
 				if (tud_disconnect()) {
+					device_state = DEVICE_INACTIVE;
 					sleep_ms(10);
-					if (tud_connect()) {
+					tud_connect();
-						if ( host_state == HOST_INACTIVE ) {
-							device_state = DEVICE_INACTIVE;
-						} else {
-							device_state = DEVICE_ACTIVE;
-						}
-					}
 				}
 				break;
 			default:
@@ -243,6 +241,11 @@ uint16_t tud_hid_get_report_cb(uint8_t instance, uint8_t report_id, hid_report_t
 	return 0;
 }
 
+// Invoked when device is mounted
+void tud_mount_cb(void) {
+	device_state = DEVICE_ACTIVE;
+}
+
 // print message to CDC in raw hex
 void cdc_print_hex(uint8_t const* msg, uint16_t msg_len) {
 	(void) msg;