3 files changed, 90 insertions, 1 deletions
diff --git a/ports/esp32s2/peripherals/pins.h b/ports/esp32s2/peripherals/pins.h
index 8bad937ef..e0f5e7ddf 100644
--- a/ports/esp32s2/peripherals/pins.h
+++ b/ports/esp32s2/peripherals/pins.h
@@ -44,7 +44,7 @@ typedef struct {
     gpio_num_t number;
     uint8_t adc_index:2;
     uint8_t adc_channel:6;
-    uint8_t touch_channel;
+    touch_pad_t touch_channel;
 } mcu_pin_obj_t;
 
 extern const mcu_pin_obj_t pin_GPIO0;
diff --git a/ports/esp32s2/peripherals/touch.c b/ports/esp32s2/peripherals/touch.c
new file mode 100644
index 000000000..6cf33b2bd
--- /dev/null
+++ b/ports/esp32s2/peripherals/touch.c
@@ -0,0 +1,53 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020 microDev
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "components/soc/include/hal/gpio_types.h"
+// above include fixes build error in idf@v4.2
+#include "peripherals/touch.h"
+
+static bool touch_inited = false;
+static bool touch_never_reset = false;
+
+void peripherals_touch_reset(void) {
+    if (touch_inited && !touch_never_reset) {
+        touch_pad_deinit();
+        touch_inited = false;
+    }
+}
+
+void peripherals_touch_never_reset(const bool enable) {
+    touch_never_reset = enable;
+}
+
+void peripherals_touch_init(const touch_pad_t touchpad) {
+    if (!touch_inited) {
+        touch_pad_init();
+        touch_pad_set_fsm_mode(TOUCH_FSM_MODE_TIMER);
+        touch_pad_fsm_start();
+        touch_inited = true;
+    }
+    touch_pad_config(touchpad);
+}
diff --git a/ports/esp32s2/peripherals/touch.h b/ports/esp32s2/peripherals/touch.h
new file mode 100644
index 000000000..218045f39
--- /dev/null
+++ b/ports/esp32s2/peripherals/touch.h
@@ -0,0 +1,36 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020 microDev
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef MICROPY_INCLUDED_ESP32S2_PERIPHERALS_TOUCH_HANDLER_H
+#define MICROPY_INCLUDED_ESP32S2_PERIPHERALS_TOUCH_HANDLER_H
+
+#include "driver/touch_pad.h"
+
+extern void peripherals_touch_reset(void);
+extern void peripherals_touch_never_reset(const bool enable);
+extern void peripherals_touch_init(const touch_pad_t touchpad);
+
+#endif  // MICROPY_INCLUDED_ESP32S2_PERIPHERALS_TOUCH_HANDLER_H