nimble/ll: Add some ll_sched GPIO debugging

nimble/controller/src/ble_ll_sched.c

@@ -31,6 +31,7 @@
 #include "controller/ble_ll_rfmgmt.h"
 #include "controller/ble_ll_trace.h"
 #include "controller/ble_ll_sync.h"
+#include "ble_ll_priv.h"
 #include "ble_ll_conn_priv.h"
 
 /* XXX: this is temporary. Not sure what I want to do here */
@@ -1469,8 +1470,10 @@ ble_ll_sched_execute_item(struct ble_ll_sched_item *sch)
     }
 
 sched:
+    BLE_LL_DEBUG_GPIO(SCHED_ITEM_CB, 1);
     BLE_LL_ASSERT(sch->sched_cb);
     rc = sch->sched_cb(sch);
+    BLE_LL_DEBUG_GPIO(SCHED_ITEM_CB, 0);
     return rc;
 }
 
@@ -1486,6 +1489,8 @@ ble_ll_sched_run(void *arg)
 {
     struct ble_ll_sched_item *sch;
 
+    BLE_LL_DEBUG_GPIO(SCHED_RUN, 1);
+
     /* Look through schedule queue */
     sch = TAILQ_FIRST(&g_ble_ll_sched_q);
     if (sch) {
@@ -1514,6 +1519,8 @@ ble_ll_sched_run(void *arg)
         }
         ble_ll_rfmgmt_sched_changed(sch);
     }
+
+    BLE_LL_DEBUG_GPIO(SCHED_RUN, 0);
 }
 
 /**
@@ -1787,6 +1794,9 @@ ble_ll_sched_stop(void)
 int
 ble_ll_sched_init(void)
 {
+    BLE_LL_DEBUG_GPIO_INIT(SCHED_ITEM_CB);
+    BLE_LL_DEBUG_GPIO_INIT(SCHED_RUN);
+
     /*
      * Initialize max early to large negative number. This is used
      * to determine the worst-case "early" time the schedule was called. Dont

nimble/controller/syscfg.yml

@@ -345,6 +345,16 @@ syscfg.defs:
             GPIO pin number to debug HCI events flow. Pin is set to high state
             when HCI event is being sent.
         value: -1
+    BLE_LL_DEBUG_GPIO_SCHED_RUN:
+        description: >
+            GPIO pin number to debug scheduler running (on timer). Pin is set
+            to high state while scheduler is running.
+        value: -1
+    BLE_LL_DEBUG_GPIO_SCHED_ITEM_CB:
+        description: >
+            GPIO pin number to debug scheduler item execution times. Pin is set
+            to high state while item is executed.
+        value: -1
 
 # Below settings allow to change scheduler timings. These should be left at
 # default values unless you know what you are doing!