pbio/sys/hmi: Fix waiting on Bluetooth to get ready.

When disabling, it should wait while ready, so until not ready.

Fixes 660d728.

This was only working on hubs with the btstack driver due to a change in the pbdrv_bluetooth_is_ready(), but we can revert that now.

Author: laurensvalk

lib/pbio/drv/bluetooth/bluetooth_btstack.c

@@ -627,7 +627,7 @@ void pbdrv_bluetooth_power_on(bool on) {
 }
 
 bool pbdrv_bluetooth_is_ready(void) {
-    return hci_get_state() != HCI_STATE_OFF || !pbdrv_bluetooth_powered_on;
+    return hci_get_state() != HCI_STATE_OFF;
 }
 
 const char *pbdrv_bluetooth_get_hub_name(void) {

lib/pbio/sys/hmi.c

@@ -188,7 +188,7 @@ static pbio_error_t pbsys_hmi_monitor_bluetooth_state(pbio_os_state_t *state) {
 
         // Start with Bluetooth off.
         pbdrv_bluetooth_power_on(false);
-        PBIO_OS_AWAIT_UNTIL(state, pbdrv_bluetooth_is_ready());
+        PBIO_OS_AWAIT_WHILE(state, pbdrv_bluetooth_is_ready());
         // Hack: this is a remnant of pbsys/bluetooth. It needs to be included
         // in the pbdrv_bluetooth_power_on(false) once it is made awaitable.
         static pbio_os_timer_t timer;