add touch alarm support for esp32s2

Author: microdev1

ports/esp32s2/Makefile

@@ -192,6 +192,7 @@ SRC_C += \
 	lib/utils/sys_stdio_mphal.c \
 	lib/netutils/netutils.c \
 	peripherals/timer.c \
+	peripherals/touch.c \
 	peripherals/pcnt.c \
 	peripherals/pins.c \
 	peripherals/rmt.c \

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

@@ -162,6 +162,7 @@ void common_hal_alarm_set_deep_sleep_alarms(size_t n_alarms, const mp_obj_t *ala
 }
 
 void NORETURN alarm_enter_deep_sleep(void) {
+    alarm_touch_touchalarm_prepare_for_deep_sleep();
     // The ESP-IDF caches the deep sleep settings and applies them before sleep.
     // We don't need to worry about resetting them in the interim.
     esp_deep_sleep_start();

ports/esp32s2/common-hal/alarm/touch/TouchAlarm.c

@@ -25,25 +25,81 @@
  */
 
 #include "shared-bindings/alarm/touch/TouchAlarm.h"
+#include "shared-bindings/microcontroller/__init__.h"
+
+#include "peripherals/touch.h"
 
 #include "esp_sleep.h"
 
 void common_hal_alarm_touch_touchalarm_construct(alarm_touch_touchalarm_obj_t *self, const mcu_pin_obj_t *pin) {
-
+    if (pin->touch_channel == TOUCH_PAD_MAX) {
+        mp_raise_ValueError(translate("Invalid pin"));
+    }
+    self->pin = pin;
 }
 
 mp_obj_t alarm_touch_touchalarm_get_wakeup_alarm(size_t n_alarms, const mp_obj_t *alarms) {
-    return mp_const_none;
+    // First, check to see if we match any given alarms.
+    for (size_t i = 0; i < n_alarms; i++) {
+        if (MP_OBJ_IS_TYPE(alarms[i], &alarm_touch_touchalarm_type)) {
+            return alarms[i];
+        }
+    }
+
+    gpio_num_t pin_number = esp_sleep_get_touchpad_wakeup_status();
+
+    alarm_touch_touchalarm_obj_t *alarm = m_new_obj(alarm_touch_touchalarm_obj_t);
+    alarm->base.type = &alarm_touch_touchalarm_type;
+    alarm->pin = NULL;
+
+    // Map the pin number back to a pin object.
+    for (size_t i = 0; i < mcu_pin_globals.map.used; i++) {
+        const mcu_pin_obj_t* pin_obj = MP_OBJ_TO_PTR(mcu_pin_globals.map.table[i].value);
+        if (pin_obj->number == pin_number) {
+            alarm->pin = mcu_pin_globals.map.table[i].value;
+            break;
+        }
+    }
+
+    return alarm;
 }
 
+static uint16_t sleep_touch_pin;
+
 void alarm_touch_touchalarm_set_alarm(alarm_touch_touchalarm_obj_t *self) {
+    sleep_touch_pin |= 1 << self->pin->number;
+    esp_sleep_enable_touchpad_wakeup();
+    esp_sleep_pd_config(ESP_PD_DOMAIN_RTC_PERIPH, ESP_PD_OPTION_ON);
+}
+
+static void configure_sleep_touch_pin(touch_pad_t touch_channel) {
+    // intialize touchpad
+    peripherals_touch_init(touch_channel);
+
+    // configure touchpad for sleep
+    touch_pad_sleep_channel_enable(touch_channel, true);
+    touch_pad_sleep_channel_enable_proximity(touch_channel, false);
+
+    // wait for touch data to reset
+    mp_hal_delay_ms(10);
 
+    uint32_t touch_value;
+    touch_pad_sleep_channel_read_smooth(touch_channel, &touch_value);
+    touch_pad_sleep_set_threshold(touch_channel, touch_value * 0.1); //10%
+}
+
+void alarm_touch_touchalarm_prepare_for_deep_sleep(void) {
+    for (uint8_t i = 1; i <= 14; i++) {
+        if ((sleep_touch_pin & 1 << i) != 0) {
+            configure_sleep_touch_pin((touch_pad_t)i);
+        }
+    }
 }
 
 bool alarm_touch_touchalarm_woke_us_up(void) {
     return false;
 }
 
 void alarm_touch_touchalarm_reset(void) {
-
+    sleep_touch_pin = 0;
 }

ports/esp32s2/common-hal/alarm/touch/TouchAlarm.h

@@ -39,6 +39,7 @@ typedef struct {
 mp_obj_t alarm_touch_touchalarm_get_wakeup_alarm(size_t n_alarms, const mp_obj_t *alarms);
 // Check for the wake up alarm from pretend deep sleep.
 void alarm_touch_touchalarm_set_alarm(alarm_touch_touchalarm_obj_t *self);
+void alarm_touch_touchalarm_prepare_for_deep_sleep(void);
 bool alarm_touch_touchalarm_woke_us_up(void);
 void alarm_touch_touchalarm_reset(void);
 

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

@@ -28,15 +28,7 @@
 
 #include "py/runtime.h"
 #include "driver/touch_pad.h"
-
-bool touch_inited = false;
-
-void touchin_reset(void) {
-    if (touch_inited) {
-        touch_pad_deinit();
-        touch_inited = false;
-    }
-}
+#include "peripherals/touch.h"
 
 static uint16_t get_raw_reading(touchio_touchin_obj_t *self) {
     uint32_t touch_value;
@@ -54,16 +46,10 @@ void common_hal_touchio_touchin_construct(touchio_touchin_obj_t* self,
     }
     claim_pin(pin);
 
-    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((touch_pad_t)pin->touch_channel);
+    // initialize touchpad
+    peripherals_touch_init((touch_pad_t)pin->touch_channel);
 
-    // wait for "raw data" to reset
+    // wait for touch data to reset
     mp_hal_delay_ms(10);
 
     // Initial values for pins will vary, depending on what peripherals the pins

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

@@ -27,16 +27,13 @@
 #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"
+#include "common-hal/microcontroller/Pin.h"
 
 typedef struct {
     mp_obj_base_t base;
     const mcu_pin_obj_t * pin;
     uint16_t threshold;
 } touchio_touchin_obj_t;
 
-void touchin_reset(void);
-
 #endif // MICROPY_INCLUDED_ESP32S2_COMMON_HAL_TOUCHIO_TOUCHIN_H

ports/esp32s2/peripherals/touch.c

@@ -0,0 +1,46 @@
+/*
+ * 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/touch.h"
+
+static bool touch_inited = false;
+
+void peripherals_touch_reset(void) {
+    if (touch_inited) {
+        touch_pad_deinit();
+        touch_inited = false;
+    }
+}
+
+void peripherals_touch_init(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);
+}

ports/esp32s2/peripherals/touch.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_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_init(touch_pad_t touchpad);
+
+#endif  // MICROPY_INCLUDED_ESP32S2_PERIPHERALS_TOUCH_HANDLER_H

ports/esp32s2/supervisor/port.c

@@ -44,7 +44,6 @@
 #include "common-hal/ps2io/Ps2.h"
 #include "common-hal/pulseio/PulseIn.h"
 #include "common-hal/pwmio/PWMOut.h"
-#include "common-hal/touchio/TouchIn.h"
 #include "common-hal/watchdog/WatchDogTimer.h"
 #include "common-hal/wifi/__init__.h"
 #include "supervisor/memory.h"
@@ -54,6 +53,7 @@
 #include "peripherals/rmt.h"
 #include "peripherals/pcnt.h"
 #include "peripherals/timer.h"
+#include "peripherals/touch.h"
 #include "components/esp_rom/include/esp_rom_uart.h"
 #include "components/heap/include/esp_heap_caps.h"
 #include "components/xtensa/include/esp_debug_helpers.h"
@@ -164,7 +164,7 @@ void reset_port(void) {
 #endif
 
 #if CIRCUITPY_TOUCHIO_USE_NATIVE
-    touchin_reset();
+    peripherals_touch_reset();
 #endif
 
 #if CIRCUITPY_WATCHDOG