SRV_Channel: add k_min, m_trim and k_max to output min/trim/max values

libraries/SRV_Channel/SRV_Channel.h

@@ -158,6 +158,9 @@ public:
         k_ProfiLED_3            = 131,
         k_ProfiLED_Clock        = 132,
         k_winch_clutch          = 133,
+        k_min                   = 134,  // always outputs SERVOn_MIN
+        k_trim                  = 135,  // always outputs SERVOn_TRIM
+        k_max                   = 136,  // always outputs SERVOn_MAX
         k_nr_aux_servo_functions         ///< This must be the last enum value (only add new values _before_ this one)
     } Aux_servo_function_t;
 

libraries/SRV_Channel/SRV_Channel_aux.cpp

@@ -197,6 +197,19 @@ void SRV_Channels::enable_aux_servos()
             hal.rcout->enable_ch(c.ch_num);
         }
 
+        // output some servo functions before we fiddle with the
+        // parameter values:
+        if (c.function.get() == SRV_Channel::k_min) {
+            c.set_output_pwm(c.servo_min);
+            c.output_ch();
+        } else if (c.function.get() == SRV_Channel::k_trim) {
+            c.set_output_pwm(c.servo_trim);
+            c.output_ch();
+        } else if (c.function.get() == SRV_Channel::k_max) {
+            c.set_output_pwm(c.servo_max);
+            c.output_ch();
+        }
+
         /*
           for channels which have been marked as digital output then the
           MIN/MAX/TRIM values have no meaning for controlling output, as