zephyr: Add Ctrl+C handling.

zephyr/Makefile

@@ -51,6 +51,7 @@ SRC_C = main.c \
 	lib/utils/stdout_helpers.c \
 	lib/utils/printf.c \
 	lib/utils/pyexec.c \
+	lib/utils/interrupt_char.c \
 	lib/mp-readline/readline.c \
 	lib/netutils/netutils.c \
 	$(BUILD)/frozen.c \

zephyr/main.c

@@ -9,6 +9,7 @@
 #include "py/gc.h"
 #include "py/stackctrl.h"
 #include "lib/utils/pyexec.h"
+#include "lib/mp-readline/readline.h"
 
 void do_str(const char *src, mp_parse_input_kind_t input_kind) {
     mp_lexer_t *lex = mp_lexer_new_from_str_len(MP_QSTR__lt_stdin_gt_, src, strlen(src), 0);
@@ -44,6 +45,7 @@ int real_main(void) {
     gc_init(heap, heap + sizeof(heap));
     #endif
     mp_init();
+    MP_STATE_PORT(mp_kbd_exception) = mp_obj_new_exception(&mp_type_KeyboardInterrupt);
     pyexec_frozen_module("main.py");
     #if MICROPY_REPL_EVENT_DRIVEN
     pyexec_event_repl_init();

zephyr/mpconfigport.h

@@ -47,6 +47,7 @@ typedef long mp_off_t;
 #define MP_STATE_PORT MP_STATE_VM
 
 #define MICROPY_PORT_ROOT_POINTERS \
+    mp_obj_t mp_kbd_exception; \
     const char *readline_hist[8];
 
 extern const struct _mp_obj_module_t mp_module_socket;

zephyr/mphalport.h

@@ -1,2 +1 @@
 static inline mp_uint_t mp_hal_ticks_ms(void) { return 0; }
-static inline void mp_hal_set_interrupt_char(char c) {}