From 0f4f4c754430dd956fd5fadef68dc8f17efbc8ac Mon Sep 17 00:00:00 2001
From: Scott Shawcroft <scott@chickadee.tech>
Date: Mon, 19 Sep 2016 16:56:42 -0700
Subject: [PATCH] atmel-samd: Add sys, fix import and increase the size of the
 heap.

---
 atmel-samd/Makefile       |  1 -
 atmel-samd/main.c         | 19 ++++++++++++++++++-
 atmel-samd/mpconfigport.h |  5 +++--
 3 files changed, 21 insertions(+), 4 deletions(-)

diff --git a/atmel-samd/Makefile b/atmel-samd/Makefile
index 1acd8f34ee..623e7827f3 100644
--- a/atmel-samd/Makefile
+++ b/atmel-samd/Makefile
@@ -156,7 +156,6 @@ SRC_C = \
 	lib/fatfs/option/ccsbcs.c \
 	lib/timeutils/timeutils.c \
 	lib/utils/stdout_helpers.c \
-	lib/utils/printf.c \
 	lib/utils/pyexec.c \
 	lib/libc/string0.c \
 	lib/mp-readline/readline.c
diff --git a/atmel-samd/main.c b/atmel-samd/main.c
index 4b7cafd4db..fa9838c7a0 100644
--- a/atmel-samd/main.c
+++ b/atmel-samd/main.c
@@ -157,13 +157,18 @@ void init_flash_fs() {
 }
 
 static char *stack_top;
-static char heap[8192];
+static char heap[16384];
 
 void reset_mp() {
     #if MICROPY_ENABLE_GC
     gc_init(heap, heap + sizeof(heap));
     #endif
     mp_init();
+    mp_obj_list_init(mp_sys_path, 0);
+    mp_obj_list_append(mp_sys_path, MP_OBJ_NEW_QSTR(MP_QSTR_)); // current dir (or base dir of the script)
+    mp_obj_list_append(mp_sys_path, MP_OBJ_NEW_QSTR(MP_QSTR__slash_flash));
+    mp_obj_list_append(mp_sys_path, MP_OBJ_NEW_QSTR(MP_QSTR__slash_flash_slash_lib));
+    mp_obj_list_init(mp_sys_argv, 0);
 
     MP_STATE_PORT(mp_kbd_exception) = mp_obj_new_exception(&mp_type_KeyboardInterrupt);
 
@@ -225,12 +230,24 @@ void gc_collect(void) {
     gc_dump_info();
 }
 
+mp_lexer_t *fat_vfs_lexer_new_from_file(const char *filename);
 mp_lexer_t *mp_lexer_new_from_file(const char *filename) {
+    #if MICROPY_VFS_FAT
+    return fat_vfs_lexer_new_from_file(filename);
+    #else
+    (void)filename;
     return NULL;
+    #endif
 }
 
+mp_import_stat_t fat_vfs_import_stat(const char *path);
 mp_import_stat_t mp_import_stat(const char *path) {
+    #if MICROPY_VFS_FAT
+    return fat_vfs_import_stat(path);
+    #else
+    (void)path;
     return MP_IMPORT_STAT_NO_EXIST;
+    #endif
 }
 
 void mp_keyboard_interrupt(void) {
diff --git a/atmel-samd/mpconfigport.h b/atmel-samd/mpconfigport.h
index f4e3de9365..c8efcac524 100644
--- a/atmel-samd/mpconfigport.h
+++ b/atmel-samd/mpconfigport.h
@@ -27,7 +27,7 @@
 #define MICROPY_HELPER_LEXER_UNIX   (0)
 #define MICROPY_ENABLE_SOURCE_LINE  (0)
 #define MICROPY_ENABLE_DOC_STRING   (0)
-#define MICROPY_ERROR_REPORTING     (MICROPY_ERROR_REPORTING_TERSE)
+#define MICROPY_ERROR_REPORTING     (MICROPY_ERROR_REPORTING_NORMAL)
 #define MICROPY_BUILTIN_METHOD_CHECK_SELF_ARG (0)
 #define MICROPY_PY_ASYNC_AWAIT      (0)
 #define MICROPY_PY_BUILTINS_BYTEARRAY (1)
@@ -49,7 +49,7 @@
 #define MICROPY_PY_CMATH            (1)
 #define MICROPY_PY_IO               (0)
 #define MICROPY_PY_STRUCT           (1)
-#define MICROPY_PY_SYS              (0)
+#define MICROPY_PY_SYS              (1)
 #define MICROPY_MODULE_FROZEN_MPY   (1)
 #define MICROPY_CPYTHON_COMPAT      (0)
 #define MICROPY_LONGINT_IMPL        (MICROPY_LONGINT_IMPL_NONE)
@@ -70,6 +70,7 @@
 #define MICROPY_REPL_AUTO_INDENT    (1)
 #define MICROPY_HW_ENABLE_DAC       (1)
 #define MICROPY_ENABLE_FINALISER    (1)
+#define MICROPY_USE_INTERNAL_PRINTF (1)
 
 // type definitions for the specific machine