Merge pull request adafruit#3614 from microDev1/rotaryio-S2

ESP32S2: Support for RotaryIO

Author: tannewt

ports/esp32s2/common-hal/rotaryio/IncrementalEncoder.c

@@ -0,0 +1,86 @@
+/*
+ * 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 "common-hal/rotaryio/IncrementalEncoder.h"
+#include "common-hal/microcontroller/Pin.h"
+
+#include "py/runtime.h"
+#include "supervisor/shared/translate.h"
+
+void common_hal_rotaryio_incrementalencoder_construct(rotaryio_incrementalencoder_obj_t* self,
+    const mcu_pin_obj_t* pin_a, const mcu_pin_obj_t* pin_b) {
+    claim_pin(pin_a);
+    claim_pin(pin_b);
+
+    // Prepare configuration for the PCNT unit
+    const pcnt_config_t pcnt_config = {
+        // Set PCNT input signal and control GPIOs
+        .pulse_gpio_num = pin_a->number,
+        .ctrl_gpio_num = pin_b->number,
+        .channel = PCNT_CHANNEL_0,
+        // What to do on the positive / negative edge of pulse input?
+        .pos_mode = PCNT_COUNT_DEC,   // Count up on the positive edge
+        .neg_mode = PCNT_COUNT_INC,   // Keep the counter value on the negative edge
+        // What to do when control input is low or high?
+        .lctrl_mode = PCNT_MODE_REVERSE, // Reverse counting direction if low
+        .hctrl_mode = PCNT_MODE_KEEP,    // Keep the primary counter mode if high
+    };
+
+     // Initialize PCNT unit
+    const int8_t unit = peripherals_pcnt_init(pcnt_config);
+    if (unit == -1) {
+        mp_raise_RuntimeError(translate("All PCNT units in use"));
+    }
+
+    self->pin_a = pin_a->number;
+    self->pin_b = pin_b->number;
+    self->unit = (pcnt_unit_t)unit;
+}
+
+bool common_hal_rotaryio_incrementalencoder_deinited(rotaryio_incrementalencoder_obj_t* self) {
+    return self->unit == PCNT_UNIT_MAX;
+}
+
+void common_hal_rotaryio_incrementalencoder_deinit(rotaryio_incrementalencoder_obj_t* self) {
+    if (common_hal_rotaryio_incrementalencoder_deinited(self)) {
+        return;
+    }
+    reset_pin_number(self->pin_a);
+    reset_pin_number(self->pin_b);
+    peripherals_pcnt_deinit(&self->unit);
+}
+
+mp_int_t common_hal_rotaryio_incrementalencoder_get_position(rotaryio_incrementalencoder_obj_t* self) {
+    int16_t count;
+    pcnt_get_counter_value(self->unit, &count);
+    return (count/2)+self->position;
+}
+
+void common_hal_rotaryio_incrementalencoder_set_position(rotaryio_incrementalencoder_obj_t* self,
+        mp_int_t new_position) {
+    self->position = new_position;
+    pcnt_counter_clear(self->unit);
+}

ports/esp32s2/common-hal/rotaryio/IncrementalEncoder.h

@@ -0,0 +1,40 @@
+/*
+ * 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_COMMON_HAL_ROTARYIO_INCREMENTALENCODER_H
+#define MICROPY_INCLUDED_ESP32S2_COMMON_HAL_ROTARYIO_INCREMENTALENCODER_H
+
+#include "py/obj.h"
+#include "peripherals/pcnt.h"
+
+typedef struct {
+    mp_obj_base_t base;
+    uint8_t pin_a, pin_b;
+    mp_int_t position;
+    pcnt_unit_t unit;
+} rotaryio_incrementalencoder_obj_t;
+
+#endif // MICROPY_INCLUDED_ESP32S2_COMMON_HAL_ROTARYIO_INCREMENTALENCODER_H

ports/esp32s2/common-hal/rotaryio/__init__.c

@@ -0,0 +1 @@
+// No rotaryio module functions.

ports/esp32s2/common-hal/touchio/TouchIn.c

@@ -3,7 +3,7 @@
  *
  * The MIT License (MIT)
  *
- * Copyright (c) 2016 Scott Shawcroft for Adafruit Industries
+ * 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

ports/esp32s2/common-hal/touchio/TouchIn.h

@@ -3,7 +3,7 @@
  *
  * The MIT License (MIT)
  *
- * Copyright (c) 2016 Scott Shawcroft
+ * 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

ports/esp32s2/mpconfigport.mk

@@ -20,7 +20,7 @@ CIRCUITPY_CANIO = 1
 CIRCUITPY_COUNTIO = 1
 CIRCUITPY_FREQUENCYIO = 0
 CIRCUITPY_I2CPERIPHERAL = 0
-CIRCUITPY_ROTARYIO = 0
+CIRCUITPY_ROTARYIO = 1
 CIRCUITPY_NVM = 0
 # We don't have enough endpoints to include MIDI.
 CIRCUITPY_USB_MIDI = 0