Requested review changes made

Author: siehputz

ports/esp32s2/supervisor/port.c

@@ -55,8 +55,7 @@
 
 uint32_t* heap;
 uint32_t heap_size;
-extern TaskHandle_t xTaskToNotify;
-
+extern TaskHandle_t sleeping_circuitpython_task;
 STATIC esp_timer_handle_t _tick_timer;
 
 extern void esp_restart(void) NORETURN;
@@ -191,23 +190,23 @@ void port_disable_tick(void) {
 }
 
 TickType_t sleep_time_duration;
-uint32_t NotifyValue = 0;
-BaseType_t notify_wait = 0;
 
 void port_interrupt_after_ticks(uint32_t ticks) {
     sleep_time_duration = (ticks * 100)/1024;
-    xTaskToNotify = xTaskGetCurrentTaskHandle();
+    sleeping_circuitpython_task = xTaskGetCurrentTaskHandle();
 }
 
 void port_sleep_until_interrupt(void) {
 
+    uint32_t NotifyValue = 0;
+
     if (sleep_time_duration == 0) {
         return;
     }
-    notify_wait = xTaskNotifyWait(0x01,0x01,&NotifyValue,
+    xTaskNotifyWait(0x01,0x01,&NotifyValue,
                              sleep_time_duration );
     if (NotifyValue == 1) {
-      xTaskToNotify = NULL;
+      sleeping_circuitpython_task = NULL;
       mp_handle_pending();
     }
 }

ports/esp32s2/supervisor/usb.c

@@ -52,7 +52,7 @@
 StackType_t  usb_device_stack[USBD_STACK_SIZE];
 StaticTask_t usb_device_taskdef;
 
-TaskHandle_t xTaskToNotify = NULL;
+TaskHandle_t sleeping_circuitpython_task = NULL;
 
 // USB Device Driver task
 // This top level thread process all usb events and invoke callbacks
@@ -129,8 +129,10 @@ void tud_cdc_rx_wanted_cb(uint8_t itf, char wanted_char)
     if (mp_interrupt_char == wanted_char) {
         tud_cdc_read_flush();    // flush read fifo
         mp_keyboard_interrupt();
-        if (xTaskToNotify != NULL) {
-          xTaskNotifyGive(xTaskToNotify);
+        // 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);
         }
     }
 }