Merge pull request #3647 from DavePutz/issue3579

Issue3579 - Check for CTRL-C During sleep on esp32s2

Author: tannewt

ports/esp32s2/supervisor/esp_port.h

@@ -0,0 +1,35 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2019 Lucian Copeland 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.
+ */
+
+#ifndef MICROPY_INCLUDED_ESP32S2_SUPERVISOR_PORT_H
+#define MICROPY_INCLUDED_ESP32S2_SUPERVISOR_PORT_H
+
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+
+extern TaskHandle_t sleeping_circuitpython_task;
+
+#endif // MICROPY_INCLUDED_ESP32S2_SUPERVISOR_PORT_H

ports/esp32s2/supervisor/port.c

@@ -30,6 +30,8 @@
 #include "supervisor/port.h"
 #include "boards/board.h"
 #include "modules/module.h"
+#include "py/runtime.h"
+#include "supervisor/esp_port.h"
 
 #include "freertos/FreeRTOS.h"
 #include "freertos/task.h"
@@ -199,25 +201,28 @@ void port_disable_tick(void) {
     esp_timer_stop(_tick_timer);
 }
 
-TickType_t sleep_time_set;
 TickType_t sleep_time_duration;
+
 void port_interrupt_after_ticks(uint32_t ticks) {
-    sleep_time_set = xTaskGetTickCount();
-    sleep_time_duration = ticks / portTICK_PERIOD_MS;
-    // esp_sleep_enable_timer_wakeup(uint64_t time_in_us)
+    sleep_time_duration = (ticks * 100)/1024;
+    sleeping_circuitpython_task = xTaskGetCurrentTaskHandle();
 }
 
 void port_sleep_until_interrupt(void) {
-    // FreeRTOS delay here maybe.
-    // Light sleep shuts down BLE and wifi.
-    // esp_light_sleep_start()
+
+    uint32_t NotifyValue = 0;
+
     if (sleep_time_duration == 0) {
         return;
     }
-    vTaskDelayUntil(&sleep_time_set, sleep_time_duration);
+    xTaskNotifyWait(0x01,0x01,&NotifyValue,
+                             sleep_time_duration );
+    if (NotifyValue == 1) {
+      sleeping_circuitpython_task = NULL;
+      mp_handle_pending();
+    }
 }
 
-
 // Wrap main in app_main that the IDF expects.
 extern void main(void);
 void app_main(void) {

ports/esp32s2/supervisor/usb.c

@@ -52,6 +52,8 @@
 StackType_t  usb_device_stack[USBD_STACK_SIZE];
 StaticTask_t usb_device_taskdef;
 
+TaskHandle_t sleeping_circuitpython_task = NULL;
+
 // USB Device Driver task
 // This top level thread process all usb events and invoke callbacks
 void usb_device_task(void* param)
@@ -114,3 +116,23 @@ void init_usb_hardware(void) {
                              usb_device_stack,
                              &usb_device_taskdef);
 }
+/**
+ * Callback invoked when received an "wanted" char.
+ * @param itf           Interface index (for multiple cdc interfaces)
+ * @param wanted_char   The wanted char (set previously)
+ */
+void tud_cdc_rx_wanted_cb(uint8_t itf, char wanted_char)
+{
+    (void) itf; // not used
+    // Workaround for using lib/utils/interrupt_char.c
+    // Compare mp_interrupt_char with wanted_char and ignore if not matched
+    if (mp_interrupt_char == wanted_char) {
+        tud_cdc_read_flush();    // flush read fifo
+        mp_keyboard_interrupt();
+        // CircuitPython's VM is run in a separate FreeRTOS task from TinyUSB.
+        // So, we must notify the other task when a CTRL-C is received.
+        if (sleeping_circuitpython_task != NULL) {
+          xTaskNotifyGive(sleeping_circuitpython_task);
+        }
+    }
+}