HAL_Linux: implement cork()/push() for Raspilot

libraries/AP_HAL_Linux/RCOutput_Raspilot.cpp

@@ -95,7 +95,7 @@ void RCOutput_Raspilot::_update(void)
 {
     int i;
 
-    if (AP_HAL::micros() - _last_update_timestamp < 10000) {
+    if (_corked || AP_HAL::micros() - _last_update_timestamp < 10000) {
         return;
     }
 
@@ -141,4 +141,14 @@ void RCOutput_Raspilot::_update(void)
     _dev->get_semaphore()->give();
 }
 
+void RCOutput_Raspilot::cork(void)
+{
+    _corked = true;
+}
+
+void RCOutput_Raspilot::push(void)
+{
+    _corked = false;
+}
+
 #endif // CONFIG_HAL_BOARD_SUBTYPE == HAL_BOARD_SUBTYPE_LINUX_RASPILOT

libraries/AP_HAL_Linux/RCOutput_Raspilot.h

@@ -15,6 +15,8 @@ public:
     void     write(uint8_t ch, uint16_t period_us);
     uint16_t read(uint8_t ch);
     void     read(uint16_t* period_us, uint8_t len);
+    void     cork(void) override;
+    void     push(void) override;
 
 private:
     void reset();
@@ -25,6 +27,7 @@ private:
     uint32_t _last_update_timestamp;
     uint16_t _frequency;
     uint16_t _period_us[8];
+    bool _corked;
 };
 
 }