Add wifi support via esp-wifi-external for ESP32P4

Adds components/avm_builtins/idf_component.yml that conditionally retreivies and includes the
espressif/esp-wifi-external component for when building for the `esp32p4` target.

Chip specific sdkconfig.defaults.esp32p4 enable the on-board PSRAM, sets the flash size to 16M
(since this is the standard ammount incuded in P4 chips), and configure the use on the on-board
ESP32C6 WiFi module as the wifi host device.

Adds ESP32P4 build tests to CI workflow.

Signed-off-by: Winford <winford@object.stream>

Author: UncleGrumpy

.github/workflows/esp32-build.yaml

@@ -45,7 +45,7 @@ jobs:
       fail-fast: false
 
       matrix:
-        esp-idf-target: ["esp32", "esp32c3"]
+        esp-idf-target: ["esp32", "esp32c3", "esp32p4"]
         language: ['cpp']
         idf-version:
          - 'v5.0.7'
@@ -59,6 +59,13 @@ jobs:
           idf-version: 'v5.0.7'
         - esp-idf-target: "esp32c3"
           idf-version: 'v5.1.5'
+        - esp-idf-target: "esp32p4"
+          idf-version: 'v5.0.7'
+        - esp-idf-target: "esp32p4"
+          idf-version: 'v5.1.5'
+        - esp-idf-target: "esp32p4"
+          idf-version: 'v5.2.3'
+
     steps:
     - name: Checkout repo
       uses: actions/checkout@v4
@@ -152,6 +159,11 @@ jobs:
         tar -xf ${QEMU_RISCV32_DIST} -C /opt && rm ${QEMU_RISCV32_DIST}
 
     - name: Install pytest and pytest-embedded plugins
+      # ESP32P4 is not currently supported by espressif/qemu, but an issue has been opened
+      # (https://github.com/espressif/qemu/issues/127) and marked as "todo" status, but no
+      # expected timeline is available yet.
+      # TODO: remove the following exclusion when ESP32P4 support is added to espressif/qemu
+      if: matrix.esp-idf-target != 'esp32p4'
       run: |
         set -e
         . $IDF_PATH/export.sh
@@ -162,6 +174,8 @@ jobs:
             pytest-embedded-qemu==1.10.3
 
     - name: Build ESP32 tests using idf.py with memory checks
+      # TODO: remove the following exclusion when ESP32P4 support is added to espressif/qemu
+      if: matrix.esp-idf-target != 'esp32p4'
       working-directory: ./src/platforms/esp32/test/
       run: |
         set -e
@@ -179,6 +193,8 @@ jobs:
         idf.py build
 
     - name: Run ESP32 tests using qemu with memory checks build
+      # TODO: remove the following exclusion when ESP32P4 support is added to espressif/qemu
+      if: matrix.esp-idf-target != 'esp32p4'
       working-directory: ./src/platforms/esp32/test/
       timeout-minutes: 10
       run: |
@@ -190,6 +206,8 @@ jobs:
         cp sdkconfig.defaults.backup sdkconfig.defaults
 
     - name: Build ESP32 tests using idf.py
+      # TODO: remove the following exclusion when ESP32P4 support is added to espressif/qemu
+      if: matrix.esp-idf-target != 'esp32p4'
       working-directory: ./src/platforms/esp32/test/
       run: |
         set -e
@@ -200,6 +218,8 @@ jobs:
         idf.py build
 
     - name: Run ESP32 tests using qemu
+      # TODO: remove the following exclusion when ESP32P4 support is added to espressif/qemu
+      if: matrix.esp-idf-target != 'esp32p4'
       working-directory: ./src/platforms/esp32/test/
       timeout-minutes: 10
       run: |

.gitignore

@@ -10,6 +10,8 @@ build/**
 xcode/**
 examples/**/build
 libs/**/build
+src/platforms/esp32/dependencies.lock
+src/platforms/esp32/managed_components/**
 src/platforms/esp32/build/**
 src/platforms/esp32/build/**/*.d
 src/platforms/esp32/test/build/**

CHANGELOG.md

@@ -47,6 +47,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Added `application:get_env/2`
 - Added CodeQL analysis to esp32, stm32, pico, and wasm workflows
 - Added Function.ex and Protocol.ex improving Elixir 1.18 support
+- Added WiFi support for ESP32P4 via esp-wifi-external for build with ESP-IDF v5.4 and later
 
 ### Changed
 

src/platforms/esp32/components/avm_builtins/Kconfig

@@ -90,12 +90,12 @@ config AVM_ENABLE_I2C_RESOURCE_NIFS
 
 config AVM_ENABLE_NETWORK_PORT_DRIVER
     bool "Enable network port driver"
-	depends on ESP_WIFI_ENABLED || ESP_HOST_WIFI_ENABLED || ESP32_WIFI_ENABLED
+	depends on ESP_WIFI_ENABLED || ESP_HOST_WIFI_ENABLED || ESP32_WIFI_ENABLED || ESP_WIFI_REMOTE_ENABLED
     default y
 
 config AVM_ENABLE_SOCKET_PORT_DRIVER
     bool "Enable socket port driver"
-	depends on ESP_WIFI_ENABLED || ESP_HOST_WIFI_ENABLED || ESP32_WIFI_ENABLED || ETH_ENABLED
+	depends on ESP_WIFI_ENABLED || ESP_HOST_WIFI_ENABLED || ESP32_WIFI_ENABLED || ETH_ENABLED || ESP_WIFI_REMOTE_ENABLED
     default y
 
 config AVM_ENABLE_SPI_PORT_DRIVER
@@ -112,17 +112,17 @@ config AVM_ENABLE_OTP_CRYPTO_NIFS
 
 config AVM_ENABLE_OTP_SOCKET_NIFS
     bool "Enable OTP Socket NIFs"
-	depends on ESP_WIFI_ENABLED || ESP_HOST_WIFI_ENABLED || ESP32_WIFI_ENABLED || ETH_ENABLED
+	depends on ESP_WIFI_ENABLED || ESP_HOST_WIFI_ENABLED || ESP32_WIFI_ENABLED || ETH_ENABLED || ESP_WIFI_REMOTE_ENABLED
     default y
 
 config AVM_ENABLE_OTP_NET_NIFS
     bool "Enable OTP Net NIFs"
-	depends on ESP_WIFI_ENABLED || ESP_HOST_WIFI_ENABLED || ESP32_WIFI_ENABLED || ETH_ENABLED
+	depends on ESP_WIFI_ENABLED || ESP_HOST_WIFI_ENABLED || ESP32_WIFI_ENABLED || ETH_ENABLED || ESP_WIFI_REMOTE_ENABLED
     default y
 
 config AVM_ENABLE_OTP_SSL_NIFS
     bool "Enable OTP SSL NIFs"
-	depends on ESP_WIFI_ENABLED || ESP_HOST_WIFI_ENABLED || ESP32_WIFI_ENABLED || ETH_ENABLED
+	depends on ESP_WIFI_ENABLED || ESP_HOST_WIFI_ENABLED || ESP32_WIFI_ENABLED || ETH_ENABLED || ESP_WIFI_REMOTE_ENABLED
     default y
 
 endmenu

src/platforms/esp32/components/avm_builtins/idf_component.yml

@@ -0,0 +1,20 @@
+# SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: AtomVM Contributors
+#
+## IDF Component Manager Manifest File
+dependencies:
+  # # Put list of dependencies here
+  # # For components maintained by Espressif:
+  # component: "~1.0.0"
+  # # For 3rd party components:
+  # username/component: ">=1.0.0,<2.0.0"
+  # username2/component2:
+  #   version: "~1.0.0"
+  #   # For transient dependencies `public` flag can be set.
+  #   # `public` flag doesn't have an effect dependencies of the `main` component.
+  #   # All dependencies of `main` are public by default.
+  #   public: true
+
+  espressif/esp_wifi_remote:
+    rules:
+     - if: "idf_version >= 5.4"

src/platforms/esp32/sdkconfig.defaults.esp32p4

@@ -0,0 +1,15 @@
+# SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: AtomVM Contributors
+#
+# ESP32-P4 Flash and PSRAM
+CONFIG_ESPTOOLPY_FLASHMODE_QIO=y
+CONFIG_ESPTOOLPY_FLASHSIZE_16MB=y
+CONFIG_PARTITION_TABLE_CUSTOM=y
+CONFIG_SPIRAM=y
+
+# esp-wifi-external config for ESP32-C6 esp_wifi_hosted via SDIO
+# (default options for esp32-p4-function-ev-board)
+CONFIG_LWIP_PPP_VJ_HEADER_COMPRESSION=n
+CONFIG_SLAVE_IDF_TARGET_ESP32C6=y
+CONFIG_WIFI_RMT_EXTRA_IRAM_OPT=n
+CONFIG_WIFI_RMT_SLP_IRAM_OPT=n