Refactor the touch sensor driver

components/soc/esp32s2beta/touch_sensor_periph.c

@@ -0,0 +1,35 @@
+// Copyright 2015-2019 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "soc/touch_sensor_periph.h"
+
+/* Store IO number corresponding to the Touch Sensor channel number. */
+/* Note: T0 is an internal channel that does not have a corresponding external GPIO. */
+const int touch_sensor_channel_io_map[SOC_TOUCH_SENSOR_NUM] = {
+    -1,
+    TOUCH_PAD_NUM1_GPIO_NUM,
+    TOUCH_PAD_NUM2_GPIO_NUM,
+    TOUCH_PAD_NUM3_GPIO_NUM,
+    TOUCH_PAD_NUM4_GPIO_NUM,
+    TOUCH_PAD_NUM5_GPIO_NUM,
+    TOUCH_PAD_NUM6_GPIO_NUM,
+    TOUCH_PAD_NUM7_GPIO_NUM,
+    TOUCH_PAD_NUM8_GPIO_NUM,
+    TOUCH_PAD_NUM9_GPIO_NUM,
+    TOUCH_PAD_NUM10_GPIO_NUM,
+    TOUCH_PAD_NUM11_GPIO_NUM,
+    TOUCH_PAD_NUM12_GPIO_NUM,
+    TOUCH_PAD_NUM13_GPIO_NUM,
+    TOUCH_PAD_NUM14_GPIO_NUM
+};