ESP32S2: Support for CountIO

locale/circuitpython.pot

@@ -8,7 +8,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2020-10-21 20:13-0500\n"
+"POT-Creation-Date: 2020-11-04 21:18+0530\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language-Team: LANGUAGE <[email protected]>\n"
@@ -296,6 +296,10 @@ msgstr ""
 msgid "All I2C peripherals are in use"
 msgstr ""
 
+#: ports/esp32s2/peripherals/pcnt_handler.c
+msgid "All PCNT units in use"
+msgstr ""
+
 #: ports/atmel-samd/common-hal/canio/Listener.c
 #: ports/esp32s2/common-hal/canio/Listener.c
 #: ports/stm/common-hal/canio/Listener.c
@@ -1109,7 +1113,8 @@ msgid "Invalid phase"
 msgstr ""
 
 #: ports/atmel-samd/common-hal/audioio/AudioOut.c
-#: ports/atmel-samd/common-hal/touchio/TouchIn.c shared-bindings/pwmio/PWMOut.c
+#: ports/atmel-samd/common-hal/touchio/TouchIn.c
+#: ports/esp32s2/common-hal/touchio/TouchIn.c shared-bindings/pwmio/PWMOut.c
 #: shared-module/rgbmatrix/RGBMatrix.c
 msgid "Invalid pin"
 msgstr ""

ports/esp32s2/Makefile

@@ -188,6 +188,7 @@ SRC_C += \
 	lib/utils/pyexec.c \
 	lib/utils/stdout_helpers.c \
 	lib/utils/sys_stdio_mphal.c \
+	peripherals/pcnt.c \
 	peripherals/pins.c \
 	peripherals/rmt.c \
 	supervisor/shared/memory.c

ports/esp32s2/common-hal/countio/Counter.c

@@ -0,0 +1,84 @@
+/*
+ * 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/countio/Counter.h"
+#include "common-hal/microcontroller/Pin.h"
+
+#include "py/runtime.h"
+#include "supervisor/shared/translate.h"
+
+void common_hal_countio_counter_construct(countio_counter_obj_t* self,
+    const mcu_pin_obj_t* pin) {
+    claim_pin(pin);
+
+    // Prepare configuration for the PCNT unit
+    const pcnt_config_t pcnt_config = {
+        // Set PCNT input signal and control GPIOs
+        .pulse_gpio_num = pin->number,
+        .ctrl_gpio_num = PCNT_PIN_NOT_USED,
+        .channel = PCNT_CHANNEL_0,
+        // What to do on the positive / negative edge of pulse input?
+        .pos_mode = PCNT_COUNT_INC,   // Count up on the positive edge
+        .neg_mode = PCNT_COUNT_DIS,   // Keep the counter value on the negative edge
+    };
+
+    // 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 = pin->number;
+    self->unit = (pcnt_unit_t)unit;
+}
+
+bool common_hal_countio_counter_deinited(countio_counter_obj_t* self) {
+    return self->unit == PCNT_UNIT_MAX;
+}
+
+void common_hal_countio_counter_deinit(countio_counter_obj_t* self) {
+    if (common_hal_countio_counter_deinited(self)) {
+        return;
+    }
+    reset_pin_number(self->pin);
+    peripherals_pcnt_deinit(&self->unit);
+}
+
+mp_int_t common_hal_countio_counter_get_count(countio_counter_obj_t* self) {
+    int16_t count;
+    pcnt_get_counter_value(self->unit, &count);
+    return count+self->count;
+}
+
+void common_hal_countio_counter_set_count(countio_counter_obj_t* self,
+        mp_int_t new_count) {
+    self->count = new_count;
+    pcnt_counter_clear(self->unit);
+}
+
+void common_hal_countio_counter_reset(countio_counter_obj_t* self) {
+   common_hal_countio_counter_set_count(self, 0);
+}

ports/esp32s2/common-hal/countio/Counter.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_COUNTIO_COUNTER_H
+#define MICROPY_INCLUDED_ESP32S2_COMMON_HAL_COUNTIO_COUNTER_H
+
+#include "py/obj.h"
+#include "peripherals/pcnt.h"
+
+typedef struct {
+    mp_obj_base_t base;
+    uint8_t pin;
+    mp_int_t count;
+    pcnt_unit_t unit;
+} countio_counter_obj_t;
+
+#endif // MICROPY_INCLUDED_ESP32S2_COMMON_HAL_COUNTIO_COUNT_H

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

@@ -0,0 +1 @@
+//No countio module functions

ports/esp32s2/mpconfigport.mk

@@ -17,7 +17,7 @@ CIRCUITPY_FULL_BUILD = 1
 CIRCUITPY_AUDIOBUSIO = 0
 CIRCUITPY_AUDIOIO = 0
 CIRCUITPY_CANIO = 1
-CIRCUITPY_COUNTIO = 0
+CIRCUITPY_COUNTIO = 1
 CIRCUITPY_FREQUENCYIO = 0
 CIRCUITPY_I2CPERIPHERAL = 0
 CIRCUITPY_ROTARYIO = 0

ports/esp32s2/peripherals/pcnt.c

@@ -0,0 +1,66 @@
+/*
+ * 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 "peripherals/pcnt.h"
+
+#define PCNT_UNIT_ACTIVE    1
+#define PCNT_UNIT_INACTIVE  0
+
+static uint8_t pcnt_state[4];
+
+int peripherals_pcnt_init(pcnt_config_t pcnt_config) {
+    // Look for available pcnt unit
+    for (uint8_t i = 0; i<=3; i++) {
+        if (pcnt_state[i] == PCNT_UNIT_INACTIVE) {
+            pcnt_config.unit = (pcnt_unit_t)i;
+            pcnt_state[i] = PCNT_UNIT_ACTIVE;
+            break;
+        } else if (i == 3) {
+            return -1;
+        }
+    }
+
+    // Initialize PCNT unit
+    pcnt_unit_config(&pcnt_config);
+
+    // Configure and enable the input filter
+    pcnt_set_filter_value(pcnt_config.unit, 100);
+    pcnt_filter_enable(pcnt_config.unit);
+
+    // Initialize PCNT's counter
+    pcnt_counter_pause(pcnt_config.unit);
+    pcnt_counter_clear(pcnt_config.unit);
+
+    // Everything is set up, now go to counting
+    pcnt_counter_resume(pcnt_config.unit);
+
+    return pcnt_config.unit;
+}
+
+void peripherals_pcnt_deinit(pcnt_unit_t* unit) {
+    pcnt_state[*unit] = PCNT_UNIT_INACTIVE;
+    *unit = PCNT_UNIT_MAX;
+}

ports/esp32s2/peripherals/pcnt.h

@@ -0,0 +1,35 @@
+/*
+ * 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_PCNT_HANDLER_H
+#define MICROPY_INCLUDED_ESP32S2_PERIPHERALS_PCNT_HANDLER_H
+
+#include "driver/pcnt.h"
+
+extern int peripherals_pcnt_init(pcnt_config_t pcnt_config);
+extern void peripherals_pcnt_deinit(pcnt_unit_t* unit);
+
+#endif  // MICROPY_INCLUDED_ESP32S2_PERIPHERALS_PCNT_HANDLER_H