[Core] Add support for RISC-V builds and GD32VF103 MCU (#12508)
* Add support for RISC-V builds and GD32VF103 MCU * Add toolchain selection in chibios.mk based on the mcu selected in mcu_selection.mk * Reorder and added comments to chibios.mk to have a streamlined makefile * Add GD32VF103 mcu to possible targets for QMK. * Add STM32 compatibility for GD32VF103 MCU, this is hacky but more efficent then rewriting every driver. * Add GigaDevice DFU bootloader as flash target, please note that dfu-util of at least version 0.10 is needed. * Add analog driver compatibility * Add apa102 bitbang driver compatibility * Add ws2812 bitbang driver compatibility * Add eeprom in flash emulation compatibility * Allow faster re-builds with ccache * Add SiPeed Longan Nano to platform files * Add SiPeed Longan Nano Onekeys * Make quine compatible with other bootloaders * Support builds with picolibc * Add risc-v toolchain to arch and debian/ubuntu scripts
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@ -541,6 +541,37 @@ ifneq (,$(filter $(MCU),STM32L412 STM32L422))
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UF2_FAMILY ?= STM32L4
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endif
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ifneq ($(findstring GD32VF103, $(MCU)),)
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# RISC-V
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MCU = risc-v
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# RISC-V extensions and abi configuration
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MCU_ARCH = rv32imac
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MCU_ABI = ilp32
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MCU_CMODEL = medlow
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## chip/board settings
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# - the next two should match the directories in
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# <chibios>/os/hal/ports/$(MCU_FAMILY)/$(MCU_SERIES)
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MCU_FAMILY = GD32V
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MCU_SERIES = GD32VF103
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# Linker script to use
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# - it should exist either in <chibios>/os/common/startup/RISCV-ECLIC/compilers/GCC/ld/
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# or <keyboard_dir>/ld/
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MCU_LDSCRIPT ?= GD32VF103xB
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# Startup code to use
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# - it should exist in <chibios>/os/common/startup/RISCV-ECLIC/compilers/GCC/mk/
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MCU_STARTUP ?= gd32vf103
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# Board: it should exist either in <chibios>/os/hal/boards/,
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# <keyboard_dir>/boards/, or drivers/boards/
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BOARD ?= SIPEED_LONGAN_NANO
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USE_FPU ?= no
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endif
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ifneq (,$(filter $(MCU),at90usb162 atmega16u2 atmega32u2 atmega16u4 atmega32u4 at90usb646 at90usb647 at90usb1286 at90usb1287))
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PROTOCOL = LUFA
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