Updates the setup AP API to be able to update just the security type.

src/freertos_drivers/net_cc32xx/CC32xxWiFi.cxx

@@ -805,18 +805,18 @@ void CC32xxWiFi::wlan_wps_pbc_initiate()
 void CC32xxWiFi::wlan_setup_ap(const char *ssid, const char *security_key,
                                SecurityType security_type)
 {
-    HASSERT(strlen(ssid) <= 32);
-    HASSERT(strlen(security_key) <= 64);
-
-    uint8_t sec_type = security_type_to_simplelink(security_type);
-
-    sl_WlanSet(SL_WLAN_CFG_AP_ID, SL_WLAN_AP_OPT_SSID, strlen(ssid),
-               (uint8_t*)ssid);
-    if (wlanRole == WlanRole::AP)
+    if (ssid)
     {
-        str_populate(this->ssid, ssid);
+        HASSERT(strlen(ssid) <= 32);
+        sl_WlanSet(SL_WLAN_CFG_AP_ID, SL_WLAN_AP_OPT_SSID, strlen(ssid),
+            (uint8_t *)ssid);
+        if (wlanRole == WlanRole::AP)
+        {
+            str_populate(this->ssid, ssid);
+        }
     }
-
+
+    uint8_t sec_type = security_type_to_simplelink(security_type);
     sl_WlanSet(SL_WLAN_CFG_AP_ID, SL_WLAN_AP_OPT_SECURITY_TYPE, 1,
                (uint8_t*)&sec_type);
 
@@ -826,6 +826,7 @@ void CC32xxWiFi::wlan_setup_ap(const char *ssid, const char *security_key,
         return;
     }
 
+    HASSERT(strlen(security_key) <= 64);
     sl_WlanSet(SL_WLAN_CFG_AP_ID, SL_WLAN_AP_OPT_PASSWORD,
                strlen(security_key), (uint8_t*)security_key);
 }

src/freertos_drivers/net_cc32xx/CC32xxWiFi.hxx

@@ -67,10 +67,12 @@ protected:
     {
     }
 
-    /** Setup access point role credentials.
-     * @param ssid access point ssid
-     * @param security_key access point security key
-     * @param security_type specifies security type
+    /** Setup access point role credentials. It is OK to leave ssid as nullptr
+     * or password as nullptr, in which case those properties will not be
+     * changed.
+     * @param ssid access point ssid (name)
+     * @param security_key access point security key (password)
+     * @param security_type specifies security type. Required.
      */
     virtual void wlan_setup_ap(const char *ssid, const char *security_key,
                                SecurityType security_type) = 0;