DAC7678 support (#3441)

Co-authored-by: Jesse Hills <3060199+jesserockz@users.noreply.github.com>

tests/test4.yaml

@@ -80,6 +80,11 @@ sx1509:
 mcp3204:
   cs_pin: GPIO23
 
+dac7678:
+    address: 0x4A
+    id: dac7678_hub1
+    internal_reference: true
+
 sensor:
   - platform: homeassistant
     entity_id: sensor.hello_world
@@ -518,6 +523,38 @@ output:
     pipsolar_id: inverter0
     battery_recharge_voltage:
       id: inverter0_battery_recharge_voltage_out
+  - platform: dac7678
+    dac7678_id: 'dac7678_hub1'
+    channel: 0
+    id: 'dac7678_1_ch0'
+  - platform: dac7678
+    dac7678_id: 'dac7678_hub1'
+    channel: 1
+    id: 'dac7678_1_ch1'
+  - platform: dac7678
+    dac7678_id: 'dac7678_hub1'
+    channel: 2
+    id: 'dac7678_1_ch2'
+  - platform: dac7678
+    dac7678_id: 'dac7678_hub1'
+    channel: 3
+    id: 'dac7678_1_ch3'
+  - platform: dac7678
+    dac7678_id: 'dac7678_hub1'
+    channel: 4
+    id: 'dac7678_1_ch4'
+  - platform: dac7678
+    dac7678_id: 'dac7678_hub1'
+    channel: 5
+    id: 'dac7678_1_ch5'
+  - platform: dac7678
+    dac7678_id: 'dac7678_hub1'
+    channel: 6
+    id: 'dac7678_1_ch6'
+  - platform: dac7678
+    dac7678_id: 'dac7678_hub1'
+    channel: 7
+    id: 'dac7678_1_ch7'
 esp32_camera:
   name: ESP-32 Camera
   data_pins: [GPIO17, GPIO35, GPIO34, GPIO5, GPIO39, GPIO18, GPIO36, GPIO19]