Initial support for native touchio

3 files changed, 152 insertions, 0 deletions

diff --git a/ports/esp32s2/common-hal/touchio/TouchIn.c b/ports/esp32s2/common-hal/touchio/TouchIn.c
new file mode 100644
index 000000000..7d30d1a32
--- /dev/null
+++ b/ports/esp32s2/common-hal/touchio/TouchIn.c
@@ -0,0 +1,109 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2016 Scott Shawcroft for Adafruit Industries
+ *
+ * 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 "shared-bindings/touchio/TouchIn.h"
+#include "py/runtime.h"
+
+#include "driver/touch_pad.h"
+
+static const touch_pad_t touch_pad[] = {
+    TOUCH_PAD_NUM1,
+    TOUCH_PAD_NUM2,
+    TOUCH_PAD_NUM3,
+    TOUCH_PAD_NUM4,
+    TOUCH_PAD_NUM5,
+    TOUCH_PAD_NUM6,
+    TOUCH_PAD_NUM7,
+    TOUCH_PAD_NUM8,
+    TOUCH_PAD_NUM9,
+    TOUCH_PAD_NUM10,
+    TOUCH_PAD_NUM11,
+    TOUCH_PAD_NUM12,
+    TOUCH_PAD_NUM13,
+    TOUCH_PAD_NUM14
+};
+
+static uint16_t get_raw_reading(touchio_touchin_obj_t *self) {
+    uint32_t touch_value;
+    touch_pad_read_raw_data(touch_pad[self->pin], &touch_value);
+    return touch_value;
+}
+
+void common_hal_touchio_touchin_construct(touchio_touchin_obj_t* self,
+        const mcu_pin_obj_t *pin) {
+    if (!pin->has_touch) {
+        mp_raise_ValueError(translate("Invalid pin"));
+    }
+    claim_pin(pin);
+
+    touch_pad_init();
+    touch_pad_config(touch_pad[pin->number]);
+
+    touch_pad_set_fsm_mode(TOUCH_FSM_MODE_TIMER);
+    touch_pad_fsm_start();
+
+    // Initial values for pins will vary, depending on what peripherals the pins
+    // share on-chip.
+
+    // Set a "touched" threshold not too far above the initial value.
+    // For simple finger touch, the values may vary as much as a factor of two,
+    // but for touches using fruit or other objects, the difference is much less.
+
+    self->pin = pin->number;
+    self->threshold = get_raw_reading(self) + 100;
+}
+
+bool common_hal_touchio_touchin_deinited(touchio_touchin_obj_t* self) {
+    return self->pin == 0xff;
+}
+
+void common_hal_touchio_touchin_deinit(touchio_touchin_obj_t* self) {
+    if (common_hal_touchio_touchin_deinited(self)) {
+        return;
+    }
+
+    //touch_pad_deinit();
+
+    reset_pin_number(self->pin);
+    self->pin = 0xff;
+}
+
+bool common_hal_touchio_touchin_get_value(touchio_touchin_obj_t *self) {
+    uint16_t reading = get_raw_reading(self);
+    return reading > self->threshold;
+}
+
+uint16_t common_hal_touchio_touchin_get_raw_value(touchio_touchin_obj_t *self) {
+    return get_raw_reading(self);
+}
+
+uint16_t common_hal_touchio_touchin_get_threshold(touchio_touchin_obj_t *self) {
+    return self->threshold;
+}
+
+void common_hal_touchio_touchin_set_threshold(touchio_touchin_obj_t *self, uint16_t new_threshold) {
+    self->threshold = new_threshold;
+}
diff --git a/ports/esp32s2/common-hal/touchio/TouchIn.h b/ports/esp32s2/common-hal/touchio/TouchIn.h
new file mode 100644
index 000000000..81d80c9dd
--- /dev/null
+++ b/ports/esp32s2/common-hal/touchio/TouchIn.h
@@ -0,0 +1,42 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2016 Scott Shawcroft
+ *
+ * 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_COMMON_HAL_TOUCHIO_TOUCHIN_H
+#define MICROPY_INCLUDED_ESP32S2_COMMON_HAL_TOUCHIO_TOUCHIN_H
+
+#include "common-hal/microcontroller/Pin.h"
+
+#include "py/obj.h"
+
+typedef struct {
+    mp_obj_base_t base;
+    uint8_t pin;
+    uint16_t threshold;
+} touchio_touchin_obj_t;
+
+void touchin_reset(void);
+
+#endif // MICROPY_INCLUDED_ESP32S2_COMMON_HAL_TOUCHIO_TOUCHIN_H
diff --git a/ports/esp32s2/common-hal/touchio/__init__.c b/ports/esp32s2/common-hal/touchio/__init__.c
new file mode 100644
index 000000000..d2290447c
--- /dev/null
+++ b/ports/esp32s2/common-hal/touchio/__init__.c
@@ -0,0 +1 @@
+// No touchio module functions.