AP_scripting: add bindings and example for analog inputs

libraries/AP_Scripting/examples/analog_input.lua

@@ -0,0 +1,18 @@
+-- This script is an example of reading a analog pin
+
+-- load the analog pin
+local analog = hal.analog_pin()
+
+analog:set_pin(13) -- typically 13 is the battery input
+
+function update()
+  gcs:send_text(0, string.format("voltage: %0.2f", analog:voltage_average()))
+
+  -- analog:voltage_average() the average voltage since the last call
+  -- analog:voltage_latest() the latest voltage reading
+  -- analog:voltage_average_ratiometric() the average ratiometric voltage (relative to the board 5v)
+
+  return update, 1000
+end
+
+return update() -- run immediately before starting to reschedule

libraries/AP_Scripting/generator/description/bindings.desc

@@ -339,3 +339,9 @@ ap_object AP_HAL::I2CDevice method set_retries void uint8_t 0 20
 ap_object AP_HAL::I2CDevice method write_register boolean uint8_t 0 UINT8_MAX uint8_t 0 UINT8_MAX
 ap_object AP_HAL::I2CDevice method read_registers boolean uint8_t 0 UINT8_MAX &uint8_t'Null 1'literal
 ap_object AP_HAL::I2CDevice method set_address void uint8_t 0 UINT8_MAX
+
+
+ap_object AP_HAL::AnalogSource method set_pin void uint8_t 0 UINT8_MAX
+ap_object AP_HAL::AnalogSource method voltage_average float
+ap_object AP_HAL::AnalogSource method voltage_latest float
+ap_object AP_HAL::AnalogSource method voltage_average_ratiometric float