configs: add preliminary support for STM32F746-DISCOVERY

firmware/config/boards/f746-discovery/board.mk

@@ -0,0 +1,39 @@
+# List of all the board related files.
+BOARDCPPSRC = $(BOARD_DIR)/board_configuration.cpp
+
+DDEFS += -DLED_CRITICAL_ERROR_BRAIN_PIN=Gpio::I1
+
+# Specific MCU
+#CHIBIOS_MCU_TYPE = STM32F746xx
+# This is almost the same, but STM32F746xx is already defined in board.h file in ChibiOS
+# Defining STM32F746xx here will cause redefined error during compilation.
+CHIBIOS_MCU_TYPE = STM32F745xx
+# Stock board.c from ChibiOS
+BOARD_C = $(CHIBIOS)/os/hal/boards/ST_STM32F746G_DISCOVERY/board.c
+# Stock board.h from ChibiOS
+BOARDINC = $(CHIBIOS)/os/hal/boards/ST_STM32F746G_DISCOVERY/
+
+# Default F7 linker script is not compatible
+LDSCRIPT = $(PROJECT_DIR)/hw_layer/ports/stm32/stm32f7/STM32F746xG.ld
+
+# Save some RAM until we enable SDRAM.
+DDEFS += -DEFI_LUA=FALSE
+
+# USB OTG FS connector:
+DDEFS += -DEFI_USB_SERIAL_DM=Gpio::A11
+DDEFS += -DEFI_USB_SERIAL_DP=Gpio::A12
+DDEFS += -DEFI_USB_AF=10
+
+DDEFS += -DEFI_DYNO_VIEW=FALSE
+
+# TODO: Enable ethernet
+#LWIP = yes
+#ALLOW_SHADOW = yes
+#DDEFS += -DCH_CFG_USE_DYNAMIC=TRUE
+#DDEFS += -DEFI_ETHERNET=TRUE
+
+BUNDLE_OPENOCD = yes
+
+DDEFS += -DFIRMWARE_ID=\"f746\"
+DDEFS += -DDEFAULT_ENGINE_TYPE=engine_type_e::MINIMAL_PINS
+DDEFS += -DSTATIC_BOARD_ID=STATIC_BOARD_ID_F746_DISCOVERY

firmware/config/boards/f746-discovery/board_configuration.cpp

@@ -0,0 +1,14 @@
+#include "pch.h"
+
+Gpio getWarningLedPin() {
+	// this board has no warning led
+	return Gpio::Unassigned;
+}
+
+Gpio getCommsLedPin() {
+	return Gpio::Unassigned;
+}
+
+Gpio getRunningLedPin() {
+	return Gpio::Unassigned;
+}

firmware/config/boards/f746-discovery/compile_f746-discovery.sh

@@ -0,0 +1,2 @@
+#!/usr/bin/env bash
+cd ../../.. && bash bin/compile.sh config/boards/f746-discovery/meta-info.env

firmware/config/boards/f746-discovery/meta-info.env

@@ -0,0 +1,3 @@
+SHORT_BOARD_NAME=f746-discovery
+PROJECT_CPU=ARCH_STM32F7
+SKIP_RATE=95