From a2e1867f69ec2d703a9651e5c36a02b0e14dfd9c Mon Sep 17 00:00:00 2001
From: Jeff Epler <jepler@gmail.com>
Date: Thu, 20 Aug 2020 11:08:00 -0500
Subject: _canio: Minimal implementation for SAM E5x MCUs

Tested & working:

 * Send standard packets
 * Receive standard packets (1 FIFO, no filter)

Interoperation between SAM E54 Xplained running this tree and
MicroPython running on STM32F405 Feather with an external
transceiver was also tested.

Many other aspects of a full implementation are not yet present,
such as error detection and recovery.
---
 py/circuitpy_defns.mk    | 9 +++++++++
 py/circuitpy_mpconfig.h  | 8 ++++++++
 py/circuitpy_mpconfig.mk | 3 +++
 3 files changed, 20 insertions(+)

(limited to 'py')

diff --git a/py/circuitpy_defns.mk b/py/circuitpy_defns.mk
index 6e98af868..2614dc011 100644
--- a/py/circuitpy_defns.mk
+++ b/py/circuitpy_defns.mk
@@ -142,6 +142,9 @@ endif
 ifeq ($(CIRCUITPY_CAMERA),1)
 SRC_PATTERNS += camera/%
 endif
+ifeq ($(CIRCUITPY_CANIO),1)
+SRC_PATTERNS += _canio/%
+endif
 ifeq ($(CIRCUITPY_COUNTIO),1)
 SRC_PATTERNS += countio/%
 endif
@@ -315,6 +318,9 @@ SRC_COMMON_HAL_ALL = \
 	busio/__init__.c \
 	camera/__init__.c \
 	camera/Camera.c \
+	_canio/CAN.c \
+	_canio/Listener.c \
+	_canio/__init__.c \
 	countio/Counter.c \
 	countio/__init__.c \
 	digitalio/DigitalInOut.c \
@@ -384,6 +390,7 @@ $(filter $(SRC_PATTERNS), \
 	_bleio/Address.c \
 	_bleio/Attribute.c \
 	_bleio/ScanEntry.c \
+	_canio/Match.c \
 	_eve/__init__.c \
 	camera/ImageFormat.c \
 	digitalio/Direction.c \
@@ -402,6 +409,8 @@ SRC_SHARED_MODULE_ALL = \
 	_bleio/Attribute.c \
 	_bleio/ScanEntry.c \
 	_bleio/ScanResults.c \
+	_canio/Match.c \
+	_canio/Message.c \
 	_eve/__init__.c \
 	_pixelbuf/PixelBuf.c \
 	_pixelbuf/__init__.c \
diff --git a/py/circuitpy_mpconfig.h b/py/circuitpy_mpconfig.h
index 4272de2ec..d1b12f354 100644
--- a/py/circuitpy_mpconfig.h
+++ b/py/circuitpy_mpconfig.h
@@ -336,6 +336,13 @@ extern const struct _mp_obj_module_t camera_module;
 #define CAMERA_MODULE
 #endif
 
+#if CIRCUITPY_CANIO
+extern const struct _mp_obj_module_t canio_module;
+#define CANIO_MODULE           { MP_OBJ_NEW_QSTR(MP_QSTR__canio), (mp_obj_t)&canio_module },
+#else
+#define CANIO_MODULE
+#endif
+
 #if CIRCUITPY_COUNTIO
 extern const struct _mp_obj_module_t countio_module;
 #define COUNTIO_MODULE        { MP_OBJ_NEW_QSTR(MP_QSTR_countio), (mp_obj_t)&countio_module },
@@ -766,6 +773,7 @@ extern const struct _mp_obj_module_t wifi_module;
     BOARD_MODULE \
     BUSIO_MODULE \
     CAMERA_MODULE \
+    CANIO_MODULE \
     COUNTIO_MODULE \
     DIGITALIO_MODULE \
     DISPLAYIO_MODULE \
diff --git a/py/circuitpy_mpconfig.mk b/py/circuitpy_mpconfig.mk
index 54bdefc6d..9b9bd83b4 100644
--- a/py/circuitpy_mpconfig.mk
+++ b/py/circuitpy_mpconfig.mk
@@ -93,6 +93,9 @@ CFLAGS += -DCIRCUITPY_BUSIO=$(CIRCUITPY_BUSIO)
 CIRCUITPY_CAMERA ?= 0
 CFLAGS += -DCIRCUITPY_CAMERA=$(CIRCUITPY_CAMERA)
 
+CIRCUITPY_CANIO ?= 0
+CFLAGS += -DCIRCUITPY_CANIO=$(CIRCUITPY_CANIO)
+
 CIRCUITPY_DIGITALIO ?= 1
 CFLAGS += -DCIRCUITPY_DIGITALIO=$(CIRCUITPY_DIGITALIO)
 
-- 
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