Added AO PWM page

Author: swatzy

www/en/modules/ROOT/images/GroveAnalogOutPWMBD.png

@@ -14,30 +14,28 @@ image::GrovePicoShieldAnalogConnections.png[]
 
 == Hardware Details
 
-https://wiki.seeedstudio.com/Grove-Dual-Button/#features[Grove Dual Button]
+https://wiki.seeedstudio.com/Grove-Passive-Buzzer/[Grove Passive Buzzer]
 
 
 == Demo Video
 
-Here is a video that shows the set-up and running of the Dual Button Digital Inputs
+Here is a video that shows the set-up and running of the Passive buzzer using a piano scale to demonstrate Frequency and Duty Cycle
 
 video::0-suR8HejsY[youtube]
 
 
 == Example Code
 
-Navigate to >>Scratchpad>>Grove>>Digital Inputs>>Grove Digital In.vi
+Navigate to >>Scratchpad>>Grove>>Analog Output PWM>>**Piano PWM AO.vi**
 
-image::images\grove-digital-inputs\GroveDigitalInProject.png[]
+image::images\GroveAnalogOutputPWMProject.png[]
 
-This particular VI uses the dual buttons. Select the port for the connected Pico and the Grove connector that the board is plugged into. Press the run arrow.
-
-You should now see the button indicators light up when the corresponding button is pressed. The Indicators use a transparent fill for the off state and a brighter Red or Green for the on state.
+This particular VI uses the passive buzzer to make the sound. Select the port for the connected Pico and the Grove connector that the board is plugged into. Press the run arrow.
 
 Links to various other similar boards are also on the Front Panel.
 
-image::images\grove-digital-inputs\GroveDigitalInFP.png[]
+image::images\GroveAnalogOutPWMFP.png[]
 
-On the block diagram you can see that the selected Grove connector dictates the GPIO Pin and we then set the pin to [In]. Next we loop round and event structure and use the timeout to poll the digital inputs. Pressing Stop will fire the Stop event and exit the loop.
+On the block diagram you can see that the selected Grove connector dictates the GPIO Pin and we then wire it to the *Configure PWM.vi* . Next we loop round the event structure waiting for button press events. If a piano key is pressed the corresponding frequency will be entered into the *PWM Write Frequency.vi*. If the duty cycle is high enough a sound of the right key should be heard. Pressing Stop will fire the Stop event and exit the loop.
 
-image::images\grove-digital-inputs\GroveDigitalInBD.png[]
+image::images\GroveAnalogOutPWMBD.png[]

www/en/modules/ROOT/images/GroveAnalogOutPWMFP.png

@@ -35,7 +35,7 @@ You can now click on the switch symbols and the corresponding relay will toggle
 
 image::I2C4ChanSPDTRelayBoardFP.png[]
 
-On the block diagram you can see that the selected Grove connector dictates the GPIO Pin and we then set the pin to [In]. Next we loop round and event structure and use the timeout to poll the digital inputs. Pressing Stop will fire the Stop event and exit the loop.
+On the block diagram you can see that the selected Grove connector dictates the GPIO Pin for the IC2 Port. We set up the IC2 port for the device in **Init.vi**. Next we loop round the event structure and wait for a button on the Front Panel to be pressed. When a switch is detected (event:Switch1,Switch2,Switch3 or Switch4) *Set Switch.vi* recieves the required settings. If the Load button is pressed the new board address is entered and the system re-initialise.  Pressing Stop will fire the Stop event and exit the loop.
 
 
 image::I2C4ChanSPDTRelayBoardBD.png[]