boards: Add CUSTOM_ESP32 board.

Signed-off-by: Damien George <[email protected]>

Author: dpgeorge

boards/CUSTOM_ESP32/CMakeLists.txt

@@ -0,0 +1,30 @@
+# Top-level cmake file for building MicroPython on ESP32.
+# Nothing in here needs to be customised, it will work for any board.
+
+cmake_minimum_required(VERSION 3.12)
+
+# Set the location of MicroPython, the esp32 port, and the board directory.
+get_filename_component(PROJECT_DIR "../.." ABSOLUTE)
+#get_filename_component(MICROPY_TOP "../../lib/micropython" ABSOLUTE)
+#set(MICROPY_PORT_DIR ${MICROPY_TOP}/ports/esp32)
+set(MICROPY_PORT_DIR ${PROJECT_DIR}/lib/micropython/ports/esp32)
+get_filename_component(MICROPY_BOARD_DIR "." ABSOLUTE)
+
+# Define the output sdkconfig so it goes in the build directory.
+set(SDKCONFIG ${CMAKE_BINARY_DIR}/sdkconfig)
+
+# Include board config; this is expected to set SDKCONFIG_DEFAULTS (among other options).
+include(${MICROPY_BOARD_DIR}/mpconfigboard.cmake)
+
+# Concatenate all sdkconfig files into a combined one for the IDF to use.
+file(WRITE ${CMAKE_BINARY_DIR}/sdkconfig.combined.in "")
+foreach(SDKCONFIG_DEFAULT ${SDKCONFIG_DEFAULTS})
+    file(READ ${SDKCONFIG_DEFAULT} CONTENTS)
+    file(APPEND ${CMAKE_BINARY_DIR}/sdkconfig.combined.in "${CONTENTS}")
+endforeach()
+configure_file(${CMAKE_BINARY_DIR}/sdkconfig.combined.in ${CMAKE_BINARY_DIR}/sdkconfig.combined COPYONLY)
+set(SDKCONFIG_DEFAULTS ${CMAKE_BINARY_DIR}/sdkconfig.combined)
+
+# Include main IDF cmake file and define the project.
+include($ENV{IDF_PATH}/tools/cmake/project.cmake)
+project(micropython)

boards/CUSTOM_ESP32/README.md

@@ -0,0 +1,10 @@
+This directory contains board definition files for an esp32-based board.
+
+To build it make sure the IDF has been installed and the environment set up,
+for example using `export $IDF_PATH/export.sh`.  Then build with:
+
+    $ idf.py build
+
+To deploy the firmware to the board:
+
+    $ idf.py -p /dev/ttyUSB0 flash

boards/CUSTOM_ESP32/main/CMakeLists.txt

@@ -0,0 +1,4 @@
+# Include MicroPython ESP32 component.
+get_filename_component(MICROPY_DIR "../../../lib/micropython" ABSOLUTE)
+set(PROJECT_DIR ${MICROPY_DIR}/ports/esp32)
+include(${PROJECT_DIR}/main/CMakeLists.txt)

boards/CUSTOM_ESP32/manifest.py

@@ -0,0 +1,2 @@
+freeze("$(PORT_DIR)/modules")
+freeze("$(BOARD_DIR)/../../src/utils", "xxd.py")

boards/CUSTOM_ESP32/mpconfigboard.cmake

@@ -0,0 +1,17 @@
+# Define the chip variant.
+set(IDF_TARGET esp32)
+
+# Set the sdkconfig fragments.
+set(SDKCONFIG_DEFAULTS
+    ${MICROPY_PORT_DIR}/boards/sdkconfig.base
+    ${MICROPY_PORT_DIR}/boards/sdkconfig.ble
+)
+
+# Set the user C modules to include in the build.
+set(USER_C_MODULES
+    ${PROJECT_DIR}/src/cmodules/cexample/micropython.cmake
+    ${PROJECT_DIR}/src/cmodules/cexample2/micropython.cmake
+)
+
+# Set the manifest file for frozen Python code.
+set(MICROPY_FROZEN_MANIFEST ${MICROPY_BOARD_DIR}/manifest.py)

boards/CUSTOM_ESP32/mpconfigboard.h

@@ -0,0 +1,2 @@
+#define MICROPY_HW_BOARD_NAME "Custom ESP32 board"
+#define MICROPY_HW_MCU_NAME "ESP32"

boards/CUSTOM_ESP32/partitions.csv

@@ -0,0 +1,7 @@
+# Notes: the offset of the partition table itself is set in
+# $IDF_PATH/components/partition_table/Kconfig.projbuild.
+# Name,   Type, SubType, Offset,  Size, Flags
+nvs,      data, nvs,     0x9000,  0x6000,
+phy_init, data, phy,     0xf000,  0x1000,
+factory,  app,  factory, 0x10000, 0x180000,
+vfs,      data, fat,     0x200000, 0x200000,