From 1b86e5fc8362a913a0ef7de01cce68c980238fd8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Noralf=20Tr=C3=B8nnes?= <noralf@tronnes.org>
Date: Sun, 7 Oct 2018 20:43:39 +0200
Subject: [PATCH] samd51: Enable functionality to support CPython stdlib

This enables various things in order to support the CPython standard library.

MICROPY_PY_BUILTINS_NOTIMPLEMENTED:
Support NotImplemented for easy conversion of stdlib.
It doesn't do fallbacks though, only raises TypeError.

MICROPY_PY_COLLECTIONS_ORDEREDDICT:
collections.OrderedDict

MICROPY_PY_FUNCTION_ATTRS:
Support function.__name__ for use as key in the function attribute workaround.

MICROPY_PY_IO:
uio module: BytesIO, FileIO, StringIO, TextIOWrapper
Also add 'io' alias.

MICROPY_PY_REVERSE_SPECIAL_METHODS:
Support the __r*__ special methods.

MICROPY_PY_SYS_EXC_INFO:
sys.exc_info() used by unittest when collecting exceptions.

MICROPY_CPYTHON_COMPAT:
Some of the things it adds:

>>> object.__init__
<function>
>>> object.__new__
<function>
>>> object.__class__
<class 'type'>
>>> object().__class__
<class 'object'>
>>> object.__name__
'object'

>>> 'Hello'.encode()
b'Hello'
>>> b'Hello'.decode()
'Hello'

Named tuple field names from string:
namedtuple('Point', 'x y')
---
 ports/atmel-samd/mpconfigport.h | 18 +++++++++++++++---
 1 file changed, 15 insertions(+), 3 deletions(-)

diff --git a/ports/atmel-samd/mpconfigport.h b/ports/atmel-samd/mpconfigport.h
index afdbf0cd82..38eabf7480 100644
--- a/ports/atmel-samd/mpconfigport.h
+++ b/ports/atmel-samd/mpconfigport.h
@@ -20,8 +20,6 @@
 #define MICROPY_COMP_CONST          (1)
 #define MICROPY_COMP_DOUBLE_TUPLE_ASSIGN (1)
 #define MICROPY_COMP_TRIPLE_TUPLE_ASSIGN (1)
-// Turn off for consistency
-#define MICROPY_CPYTHON_COMPAT      (0)
 #define MICROPY_MEM_STATS           (0)
 #define MICROPY_DEBUG_PRINTERS      (0)
 #define MICROPY_ENABLE_GC           (1)
@@ -57,7 +55,6 @@
 #define MICROPY_PY_DESCRIPTORS      (1)
 #define MICROPY_PY_MATH             (0)
 #define MICROPY_PY_CMATH            (0)
-#define MICROPY_PY_IO               (0)
 #define MICROPY_PY_URANDOM          (0)
 #define MICROPY_PY_URANDOM_EXTRA_FUNCS (0)
 #define MICROPY_PY_STRUCT           (0)
@@ -142,14 +139,28 @@ typedef long mp_off_t;
 #define CIRCUITPY_MCU_FAMILY                        samd21
 #define MICROPY_PY_SYS_PLATFORM                     "Atmel SAMD21"
 #define PORT_HEAP_SIZE                              (16384 + 4096)
+#define MICROPY_CPYTHON_COMPAT                      (0)
 #define MICROPY_MODULE_WEAK_LINKS                   (0)
+#define MICROPY_PY_BUILTINS_NOTIMPLEMENTED          (0)
+#define MICROPY_PY_COLLECTIONS_ORDEREDDICT          (0)
+#define MICROPY_PY_FUNCTION_ATTRS                   (0)
+#define MICROPY_PY_IO                               (0)
+#define MICROPY_PY_REVERSE_SPECIAL_METHODS          (0)
+#define MICROPY_PY_SYS_EXC_INFO                     (0)
 #endif
 
 #ifdef SAMD51
 #define CIRCUITPY_MCU_FAMILY                        samd51
 #define MICROPY_PY_SYS_PLATFORM                     "MicroChip SAMD51"
 #define PORT_HEAP_SIZE                              (0x20000) // 128KiB
+#define MICROPY_CPYTHON_COMPAT                      (1)
 #define MICROPY_MODULE_WEAK_LINKS                   (1)
+#define MICROPY_PY_BUILTINS_NOTIMPLEMENTED          (1)
+#define MICROPY_PY_COLLECTIONS_ORDEREDDICT          (1)
+#define MICROPY_PY_FUNCTION_ATTRS                   (1)
+#define MICROPY_PY_IO                               (1)
+#define MICROPY_PY_REVERSE_SPECIAL_METHODS          (1)
+#define MICROPY_PY_SYS_EXC_INFO                     (1)
 #endif
 
 #ifdef LONGINT_IMPL_NONE
@@ -315,6 +326,7 @@ extern const struct _mp_obj_module_t usb_hid_module;
 
 #define MICROPY_PORT_BUILTIN_MODULE_WEAK_LINKS \
     { MP_ROM_QSTR(MP_QSTR_errno), MP_ROM_PTR(&mp_module_uerrno) }, \
+    { MP_ROM_QSTR(MP_QSTR_io), MP_ROM_PTR(&mp_module_io) }, \
     { MP_ROM_QSTR(MP_QSTR_os), MP_ROM_PTR(&os_module) }, \
     { MP_OBJ_NEW_QSTR(MP_QSTR_time), (mp_obj_t)&time_module }, \