Added pi-topPULSE description, image and list index

src/en/overlay/pi-top-pulse.md

@@ -0,0 +1,69 @@
+<!--
+---
+name: pi-topPULSE
+class: board
+type: audio,io,led,sensor
+formfactor: HAT
+manufacturer: pi-top
+description: 7×7 RGB LED matrix, speaker and microphone
+url: http://pi-top.com/products/pulse
+github: https://github.com/pi-top/pi-topPULSE
+buy: http://pi-top.com/products/pulse
+image: 'pi-top-pulse.png'
+pincount: 40
+eeprom: setup
+power:
+  '1':
+  '2':
+ground:
+  '6':
+  '9':
+  '14':
+  '20':
+  '25':
+  '30':
+  '34':
+  '39':
+pin:
+  '3':
+    name: SDA
+    mode: i2c
+  '5':
+    name: SCL
+    mode: i2c
+  '8':
+    name: TXD / Transmit
+    direction: output
+    mode: uart
+  '10':
+    name: RXD / Receive
+    direction: input
+    mode: uart
+  '12':
+    name: BCKL (Bit Clock)
+    mode: i2s
+  '35':
+    name: LRCK (Left/Right Clock)
+    mode: i2s
+  '40':
+    name: DOUT
+    mode: i2s
+i2c:
+  '0x24':
+    name: Feature-enable IC
+    device: pca9570
+install:
+  'devices':
+    - 'i2s'
+    - 'i2c'
+  'apt':
+    - 'pt-pulse'
+    - 'python-pt-pulse'
+    - 'python3-pt-pulse'
+-->
+#pi-topPULSE
+
+The pi-topPULSE is a Raspberry Pi HAT and a pi-top/pi-topCEED compatible add-on board comprising of a 7x7 LED array, a speaker and a microphone.
+Additionally the device features ambient lights: 4 around the speaker, and 3 on the underside.
+The speaker uses I2S, and the LEDs and microphone use serial (UART) - Tx and Rx respectively.
+A PCA9570 IC is exposed at I2C address 0x24, which allows for enabling/disabling/probing the on-board speaker, MCU and EEPROM as well as toggling the microphone sampling rate between 16KHz and 22KHz.

src/en/settings.yaml

@@ -96,6 +96,7 @@ overlays:
 - phat-dac
 - pi-cap
 - pi-liter
+- pi-top-pulse
 - piano-hat
 - piborg-ledborg
 - piborg-zeroborg