VirtualWatchdog: provide hw timeout via ctor

Author: 0xc0170

drivers/VirtualWatchdog.cpp

@@ -17,7 +17,6 @@
 #ifdef DEVICE_WATCHDOG
 
 #include "drivers/VirtualWatchdog.h"
-#include "drivers/Watchdog.h"
 
 #define MS_TO_US(x) ((x) * 1000)
 #define US_TO_MS(x) ((x) / 1000)
@@ -34,7 +33,7 @@ VirtualWatchdog *VirtualWatchdog::_first = NULL;
 bool VirtualWatchdog::_is_hw_watchdog_running = false;
 us_timestamp_t VirtualWatchdog::_ticker_timeout = 0;
 
-VirtualWatchdog::VirtualWatchdog(uint32_t timeout, const char *const str): _name(str)
+VirtualWatchdog::VirtualWatchdog(uint32_t timeout, const char *const str, uint32_t watchdog_hw_timeout) : _name(str)
 {
     _current_count = 0;
     _is_initialized = false;
@@ -47,8 +46,8 @@ VirtualWatchdog::VirtualWatchdog(uint32_t timeout, const char *const str): _name
             MBED_MAKE_ERROR(MBED_MODULE_DRIVER_WATCHDOG, MBED_ERROR_INITIALIZATION_FAILED);
         }
         // we use default hw timeout provided by config
-        watchdog.start(Watchdog::watchdog_timeout);
-        _ticker_timeout = MS_TO_US(Watchdog::watchdog_timeout / 2);
+        watchdog.start(watchdog_hw_timeout);
+        _ticker_timeout = MS_TO_US(watchdog_hw_timeout / 2);
         if (_ticker_timeout == 0) {
             _ticker_timeout = 1;
         }

drivers/VirtualWatchdog.h

@@ -26,6 +26,7 @@
 #include "platform/mbed_power_mgmt.h"
 #include "platform/mbed_assert.h"
 #include "platform/SingletonPtr.h"
+#include "drivers/Watchdog.h"
 
 #if DEVICE_LPTICKER
 #include "drivers/LowPowerTicker.h"
@@ -65,11 +66,13 @@ class VirtualWatchdog {
 
     /** Constructor configured with timeout and name for this software watchdog instance.
      *
-     * We start hardware watchdog on  the first run. This set-up uses default watchdog timeout set via config value
-     * MBED_CONF_TARGET_WATCHDOG_TIMEOUT.
+     *  @param timeout Timer timeout
+     *  @param str The name for this watchdog timer
+     *  @param watchdog_hw_timeout The watchdog driver timeout - can be set only once (as soon as watchdog runs, cannot be reconfigured)
      *
      */
-    VirtualWatchdog(uint32_t timeout = 1000, const char *const str = NULL);
+    VirtualWatchdog(uint32_t timeout = 1000, const char *const str = NULL, uint32_t watchdog_hw_timeout = Watchdog::watchdog_timeout);
+
     ~VirtualWatchdog();
 public: