add Ctrl+C for REPL over bleuart

Author: hathach

ports/nrf/drivers/bluetooth/ble_uart.c

@@ -30,6 +30,7 @@
 #include "ble_uart.h"
 #include "ringbuffer.h"
 #include "hal/hal_time.h"
+#include "lib/utils/interrupt_char.h"
 
 #if MICROPY_PY_BLE_NUS
 
@@ -145,6 +146,7 @@ STATIC void gap_event_handler(mp_obj_t self_in, uint16_t event_id, uint16_t conn
     } else if (event_id == 17) {         // disconnect event
         self->conn_handle = 0xFFFF;      // invalid connection handle
         m_connected = false;
+        ble_uart_advertise();
     }
 }
 
@@ -157,7 +159,14 @@ STATIC void gatts_event_handler(mp_obj_t self_in, uint16_t event_id, uint16_t at
             m_cccd_enabled = true;
         } else if (ble_uart_char_rx.handle == attr_handle) {
             for (uint16_t i = 0; i < length; i++) {
-                bufferWrite(mp_rx_ring_buffer, data[i]);
+                #if MICROPY_KBD_EXCEPTION
+                if (data[i] == mp_interrupt_char) {
+                    mp_keyboard_interrupt();
+                } else
+                #endif
+                {
+                    bufferWrite(mp_rx_ring_buffer, data[i]);
+                }
             }
         }
     }