Add preliminary ESP32 platform support (project-chip#411)

* Add helper mk files for ESP32

* Rename to CHIP

* Add ESP32 Device Layer source files

* Rename files and fix formatting

* Add ESP32 platform includes

* Fix names and format

* Add missing source file

* Fix bad filename

* Restyled by astyle

* Restyled by clang-format

* Restyled by whitespace

* Add missing CHIP copyright

Co-authored-by: Restyled.io <[email protected]>

build/esp32/components/chip/component.mk

@@ -0,0 +1,182 @@
+#
+#    Copyright (c) 2020 Project CHIP Authors
+#    Copyright (c) 2018 Nest Labs, Inc.
+#    All rights reserved.
+#
+#    Licensed under the Apache License, Version 2.0 (the "License");
+#    you may not use this file except in compliance with the License.
+#    You may obtain a copy of the License at
+#
+#        http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS,
+#    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#    See the License for the specific language governing permissions and
+#    limitations under the License.
+#
+#    Description:
+#      Component makefile for building CHIP within the ESP32 ESP-IDF environment.
+#
+
+# ==================================================
+# General settings
+# ==================================================
+
+# CHIP source root directory
+CHIP_ROOT              ?= $(realpath $(COMPONENT_PATH)/../../../..)
+
+# Archtecture for which CHIP will be built.
+HOST_ARCH                   := xtensa-unknown-linux-gnu
+
+# Directory into which the CHIP build system will place its output.
+OUTPUT_DIR					:= $(BUILD_DIR_BASE)/chip
+REL_OUTPUT_DIR              := $(shell perl -e 'use File::Spec; use Cwd; print File::Spec->abs2rel(Cwd::realpath($$ARGV[0]), Cwd::realpath($$ARGV[1])) . "\n"' $(OUTPUT_DIR) $(COMPONENT_PATH))
+
+# Directory containing esp32-specific CHIP project configuration files.
+PROJECT_CONFIG_DIR          := $(CHIP_ROOT)/build/config/esp32
+
+# Architcture on which CHIP is being built.
+BUILD_ARCH                  := $(shell $(CHIP_ROOT)/third_party/nlbuild-autotools/repo/third_party/autoconf/config.guess | sed -e 's/[[:digit:].]*$$//g')
+
+# Directory containing the esp32-specific LwIP component sources.
+LWIP_COMPONENT_DIR      	?= $(PROJECT_PATH)/components/lwip
+
+
+# ==================================================
+# Compilation flags specific to building CHIP
+# ==================================================
+
+# Include directories to be searched when building CHIP.
+INCLUDES                    := $(OUTPUT_DIR)/src/include \
+                               $(OUTPUT_DIR)/src/include/CHIP/DeviceLayer/ESP32 \
+                               $(CHIP_ROOT)/src/adaptations/device-layer/trait-support \
+                               $(COMPONENT_INCLUDES)
+
+# Compiler flags for building CHIP
+CFLAGS                      += $(addprefix -I,$(INCLUDES))
+CPPFLAGS                    += $(addprefix -I,$(INCLUDES))
+CXXFLAGS                    += $(addprefix -I,$(INCLUDES))
+
+INSTALL                     := /usr/bin/install
+INSTALLFLAGS                := -C -v
+
+
+# ==================================================
+# Utility Functions
+# ==================================================
+
+QuoteChar = "
+
+DoubleQuoteStr = $(QuoteChar)$(subst $(QuoteChar),\$(QuoteChar),$(subst \,\\,$(1)))$(QuoteChar)
+
+
+# ==================================================
+# CHIP configuration options
+# ==================================================
+
+# ESP-IDF's project.mk fails to define RANLIB appropriately, so we define it here.
+RANLIB                      := $(call dequote,$(CONFIG_TOOLPREFIX))ranlib
+
+CONFIGURE_OPTIONS       	:= AR="$(AR)" CC="$(CC)" CXX="$(CXX)" LD="$(LD)" OBJCOPY="$(OBJCOPY)" RANLIB="$(RANLIB)" \
+                               INSTALL="$(INSTALL) $(INSTALLFLAGS)" \
+                               CFLAGS=$(call DoubleQuoteStr, $(CFLAGS)) \
+                               CPPFLAGS=$(call DoubleQuoteStr, $(CPPFLAGS)) \
+                               CXXFLAGS=$(call DoubleQuoteStr, $(CXXFLAGS)) \
+                               --prefix=$(OUTPUT_DIR) \
+                               --exec-prefix=$(OUTPUT_DIR) \
+                               --host=$(HOST_ARCH) \
+                               --build=$(BUILD_ARCH) \
+                               --with-device-layer=esp32 \
+                               --with-network-layer=all \
+                               --with-target-network=lwip \
+                               --with-lwip=$(LWIP_COMPONENT_DIR) \
+                               --with-inet-endpoint="tcp udp tun dns" \
+                               --with-openssl=no \
+                               --with-logging-style=external \
+                               --with-chip-project-includes= \
+                               --with-chip-system-project-includes= \
+                               --with-chip-inet-project-includes= \
+                               --with-chip-ble-project-includes= \
+                               --with-chip-warm-project-includes= \
+                               --disable-tests \
+                               --disable-tools \
+                               --disable-docs \
+                               --disable-java \
+                               --disable-device-manager
+
+# Enable debug and disable optimization if ESP-IDF Optimization Level is set to Debug.
+ifeq ($(CONFIG_OPTIMIZATION_LEVEL_DEBUG),y)
+CONFIGURE_OPTIONS           += --enable-debug --enable-optimization=no
+else
+CONFIGURE_OPTIONS           +=  --enable-optimization=yes
+endif
+
+
+# ==================================================
+# Configuration for the CHIP ESF-IDF Component
+# ==================================================
+
+# Header directories to be included when building other components that use CHIP.
+# Note that these must be relative to the component source directory.
+COMPONENT_ADD_INCLUDEDIRS 	 = project-config \
+                               $(REL_OUTPUT_DIR)/include
+
+# Linker flags to be included when building other components that use CHIP.
+COMPONENT_ADD_LDFLAGS        = -L$(OUTPUT_DIR)/lib \
+					           -lCHIP \
+					           -lInetLayer \
+					           -lmincrypt \
+					           -lnlfaultinjection \
+					           -lSystemLayer \
+					           -luECC \
+					           -lWarm \
+					           -lDeviceLayer
+
+# Tell the ESP-IDF build system that the CHIP component defines its own build
+# and clean targets.
+COMPONENT_OWNBUILDTARGET 	 = 1
+COMPONENT_OWNCLEANTARGET 	 = 1
+
+
+# ==================================================
+# Build Rules
+# ==================================================
+
+.PHONY : check-config-args-updated
+check-config-args-updated : | $(OUTPUT_DIR)
+	echo $(CHIP_ROOT)/configure $(CONFIGURE_OPTIONS) > $(OUTPUT_DIR)/config.args.tmp; \
+	(test -r $(OUTPUT_DIR)/config.args && cmp -s $(OUTPUT_DIR)/config.args.tmp $(OUTPUT_DIR)/config.args) || \
+	    mv $(OUTPUT_DIR)/config.args.tmp $(OUTPUT_DIR)/config.args; \
+	rm -f $(OUTPUT_DIR)/config.args.tmp;
+
+$(OUTPUT_DIR)/config.args : check-config-args-updated
+	@: # Null action required to work around make's crazy timestamp caching behavior.
+
+$(CHIP_ROOT)/configure : $(CHIP_ROOT)/configure.ac
+	echo "BOOTSTRAP CHIP..."
+	(cd $(CHIP_ROOT) && ./bootstrap)
+
+$(OUTPUT_DIR)/config.status : $(CHIP_ROOT)/configure $(OUTPUT_DIR)/config.args
+	echo "CONFIGURE CHIP..."
+	(cd $(OUTPUT_DIR) && $(CHIP_ROOT)/configure $(CONFIGURE_OPTIONS))
+
+configure-chip : $(OUTPUT_DIR)/config.status
+
+$(OUTPUT_DIR) :
+	echo "MKDIR $@"
+	@mkdir -p "$@"
+
+build-chip : configure-chip
+	echo "BUILD CHIP..."
+	MAKEFLAGS= make -C $(OUTPUT_DIR) --no-print-directory all
+
+install-chip : | build-chip
+	echo "INSTALL CHIP..."
+	MAKEFLAGS= make -C $(OUTPUT_DIR) --no-print-directory install
+
+build : build-chip install-chip
+
+clean:
+	echo "RM $(OUTPUT_DIR)"
+	rm -rf $(OUTPUT_DIR)

src/include/platform/CHIPDeviceEvent.h

@@ -27,16 +27,15 @@
 
 namespace chip {
 namespace DeviceLayer {
-
 namespace DeviceEventType {
 
 enum
 {
-    kFlag_IsPublic                      = 0x8000,
-    kFlag_IsPlatformSpecific            = 0x4000,
-    kFlag_Reserved1                     = 0x2000,
-    kFlag_Reserved2                     = 0x1000,
-    kMaxEventNum                        = 0x0FFF,
+    kFlag_IsPublic           = 0x8000,
+    kFlag_IsPlatformSpecific = 0x4000,
+    kFlag_Reserved1          = 0x2000,
+    kFlag_Reserved2          = 0x1000,
+    kMaxEventNum             = 0x0FFF,
 };
 
 /**
@@ -53,35 +52,47 @@ enum EventTypeRanges
      * Denotes a range of event types that are publicly visible to applications.  Events in this
      * range a generic to all platforms.
      */
-    kRange_Public                       = kFlag_IsPublic,
+    kRange_Public = kFlag_IsPublic,
 
     /**
      * Public, Platform-specific Event Range
      *
      * Denotes a range of platform-specific event types that are publicly visible to applications.
      */
-    kRange_PublicPlatformSpecific       = kFlag_IsPublic | kFlag_IsPlatformSpecific,
+    kRange_PublicPlatformSpecific = kFlag_IsPublic | kFlag_IsPlatformSpecific,
 
     /**
      * Internal Event Range
      *
      * Denotes a range of event types that are internal to the chip Device Layer.  Events in this
      * range a generic to all platforms.
      */
-    kRange_Internal                     = 0,
+    kRange_Internal = 0,
 
     /**
      * Internal, Platform-specific Event Range
      *
      * Denotes a range of platform-specific event types that are internal to the chip Device Layer.
      */
-    kRange_InternalPlatformSpecific     = kFlag_IsPlatformSpecific,
+    kRange_InternalPlatformSpecific = kFlag_IsPlatformSpecific,
 };
 
-inline bool IsPublic(uint16_t eventType) { return (eventType & kFlag_IsPublic) != 0; }
-inline bool IsInternal(uint16_t eventType) { return (eventType & kFlag_IsPublic) == 0; }
-inline bool IsPlatformSpecific(uint16_t eventType) { return (eventType & kFlag_IsPlatformSpecific) != 0; }
-inline bool IsPlatformGeneric(uint16_t eventType) { return (eventType & kFlag_IsPlatformSpecific) == 0; }
+inline bool IsPublic(uint16_t eventType)
+{
+    return (eventType & kFlag_IsPublic) != 0;
+}
+inline bool IsInternal(uint16_t eventType)
+{
+    return (eventType & kFlag_IsPublic) == 0;
+}
+inline bool IsPlatformSpecific(uint16_t eventType)
+{
+    return (eventType & kFlag_IsPlatformSpecific) != 0;
+}
+inline bool IsPlatformGeneric(uint16_t eventType)
+{
+    return (eventType & kFlag_IsPlatformSpecific) == 0;
+}
 
 /**
  * Public Event Types
@@ -96,7 +107,7 @@ enum PublicEventTypes
      *
      * Signals a change in connectivity of the device's WiFi station interface.
      */
-    kWiFiConnectivityChange             = kRange_Public,
+    kWiFiConnectivityChange = kRange_Public,
 
     /**
      * Thread Connectivity Change
@@ -205,7 +216,7 @@ enum PublicEventTypes
  */
 enum InternalEventTypes
 {
-    kEventTypeNotSet                    = kRange_Internal,
+    kEventTypeNotSet = kRange_Internal,
     kNoOp,
     kCallWorkFunct,
     kChipSystemLayerEvent,
@@ -227,9 +238,9 @@ static_assert(kEventTypeNotSet == 0, "kEventTypeNotSet must be defined as 0");
  */
 enum ConnectivityChange
 {
-    kConnectivity_NoChange      = 0,
-    kConnectivity_Established   = 1,
-    kConnectivity_Lost          = -1
+    kConnectivity_NoChange    = 0,
+    kConnectivity_Established = 1,
+    kConnectivity_Lost        = -1
 };
 
 /**
@@ -239,9 +250,9 @@ enum ConnectivityChange
  */
 enum ActivityChange
 {
-    kActivity_NoChange          = 0,
-    kActivity_Started           = 1,
-    kActivity_Stopped           = -1,
+    kActivity_NoChange = 0,
+    kActivity_Started  = 1,
+    kActivity_Stopped  = -1,
 };
 
 inline ConnectivityChange GetConnectivityChange(bool prevState, bool newState)