AP_Scripting: add PWM and GPIO to analog input example

libraries/AP_Scripting/examples/analog_input.lua

@@ -1,18 +0,0 @@
--- 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/examples/analog_input_and_GPIO.lua

@@ -0,0 +1,47 @@
+-- This script is an example of reading a analog pin, PWM in and GPIO
+
+-- for these examples BRD_PWM_COUNT must be 0
+
+-- load the analog pin, there are only 16 of these available
+-- some are used by the main AP code, ie battery monitors
+-- assign them like this in the init, not in the main loop
+local analog = hal.analog_pin()
+analog:set_pin(13) -- typically 13 is the battery input
+
+-- load a input pwm pin
+local pwm_in = PWMSource()
+local pwm_in_fail = PWMSource()
+
+if not pwm_in:set_pin(50) then -- AUX 1
+  gcs:send_text(0, "Failed to setup PWM in on pin 50")
+end
+
+-- there are a few combinations of PWM in that will not work
+-- this is due to the way interrupts are handled, AUX 1 and 6 cannot both
+-- be PWM at once because they use the same interrupt (on Cubes), this should fail
+if not pwm_in_fail:set_pin(55) then -- AUX 6
+  gcs:send_text(0, "Failed to setup PWM in on pin 55")
+end
+
+hal.pin_mode(51,1) -- set AUX 2 to output, hal.pin_mode(51,0) would be input
+
+function update()
+  gcs:send_text(0, string.format("voltage: %0.2f, PWM: %i, input: ", analog:voltage_average(), pwm_in:get_pwm_us()) .. tostring(hal.read(51)))
+
+  -- 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)
+
+  -- pwm_in:get_pwm_us() the latest pwm value in us
+  -- pwm_in:get_pwm_avg_us() the average pwm value in us since the last call
+
+  -- hal.read(pin)
+  -- hal.write(pin, state)
+  -- hal.toggle(pin)
+
+  hal.toggle(51)
+
+  return update, 1000
+end
+
+return update() -- run immediately before starting to reschedule