Add support for the XPT2046 touchscreen controller (#1542)

tests/test4.yaml

@@ -100,6 +100,15 @@ binary_sensor:
     on_state:
       then:
         - lambda: 'ESP_LOGI("ar1:", "%d", x);'
+  - platform: xpt2046
+    xpt2046_id: touchscreen
+    id: touch_key0
+    x_min: 80
+    x_max: 160
+    y_min: 106
+    y_max: 212
+    on_state:
+      - lambda: 'ESP_LOGI("main", "key0: %s", (x ? "touch" : "release"));'
 
 climate:
   - platform: tuya
@@ -180,3 +189,28 @@ external_components:
     components: ["bh1750"]
   - source: ../esphome/components
     components: ["sntp"]
+xpt2046:
+  id: touchscreen
+  cs_pin: 17
+  irq_pin: 16
+  update_interval: 50ms
+  report_interval: 1s
+  threshold: 400
+  dimension_x: 240
+  dimension_y: 320
+  calibration_x_min: 3860
+  calibration_x_max: 280
+  calibration_y_min: 340
+  calibration_y_max: 3860
+  swap_x_y: False
+  on_state:
+    - lambda: |-
+        ESP_LOGI("main", "args x=%d, y=%d, touched=%s", x, y, (touched ? "touch" : "release"));
+        ESP_LOGI("main", "member x=%d, y=%d, touched=%d, x_raw=%d, y_raw=%d, z_raw=%d",
+            id(touchscreen).x,
+            id(touchscreen).y,
+            (int) id(touchscreen).touched,
+            id(touchscreen).x_raw,
+            id(touchscreen).y_raw,
+            id(touchscreen).z_raw
+            );