Add STM32L432 support and STM32L4 series EEPROM emulation

builddefs/mcu_selection.mk

@@ -472,6 +472,40 @@ ifneq ($(findstring STM32G474, $(MCU)),)
   UF2_FAMILY ?= STM32G4
 endif
 
+ifneq (,$(filter $(MCU),STM32L432))
+  # Cortex version
+  MCU = cortex-m4
+
+  # ARM version, CORTEX-M0/M1 are 6, CORTEX-M3/M4/M7 are 7
+  ARMV = 7
+
+  ## chip/board settings
+  # - the next two should match the directories in
+  #   <chibios>/os/hal/ports/$(MCU_FAMILY)/$(MCU_SERIES)
+  MCU_FAMILY = STM32
+  MCU_SERIES = STM32L4xx
+
+  # Linker script to use
+  # - it should exist either in <chibios>/os/common/startup/ARMCMx/compilers/GCC/ld/
+  #   or <keyboard_dir>/ld/
+  MCU_LDSCRIPT ?= STM32L432xC
+
+  # Startup code to use
+  #  - it should exist in <chibios>/os/common/startup/ARMCMx/compilers/GCC/mk/
+  MCU_STARTUP ?= stm32l4xx
+
+  # Board: it should exist either in <chibios>/os/hal/boards/,
+  # <keyboard_dir>/boards/, or drivers/boards/
+  BOARD ?= GENERIC_STM32_L432KC
+
+  PLATFORM_NAME ?= platform_l432
+
+  USE_FPU ?= yes
+
+  # UF2 settings
+  UF2_FAMILY ?= STM32L4
+endif
+
 ifneq (,$(filter $(MCU),STM32L433 STM32L443))
   # Cortex version
   MCU = cortex-m4

common_features.mk

@@ -154,6 +154,12 @@ else
         COMMON_VPATH += $(PLATFORM_PATH)/$(PLATFORM_KEY)/$(DRIVER_DIR)/eeprom
         SRC += eeprom_driver.c
         SRC += eeprom_stm32_L0_L1.c
+      else ifneq ($(filter $(MCU_SERIES),STM32L4xx),)
+        OPT_DEFS += -DEEPROM_DRIVER
+        COMMON_VPATH += $(DRIVER_PATH)/eeprom
+        SRC += eeprom_driver.c
+        SRC += $(PLATFORM_COMMON_DIR)/eeprom_stm32_l4.c
+        SRC += $(PLATFORM_COMMON_DIR)/flash_stm32.c
       else
         # This will effectively work the same as "transient" if not supported by the chip
         SRC += $(PLATFORM_COMMON_DIR)/eeprom_teensy.c

data/schemas/keyboard.jsonschema

@@ -13,7 +13,7 @@
         },
         "processor": {
             "type": "string",
-            "enum": ["cortex-m0", "cortex-m0plus", "cortex-m3", "cortex-m4", "MKL26Z64", "MK20DX128", "MK20DX256", "MK66FX1M0", "STM32F042", "STM32F072", "STM32F103", "STM32F303", "STM32F401", "STM32F405", "STM32F407", "STM32F411", "STM32F446", "STM32G431", "STM32G474", "STM32L412", "STM32L422", "STM32L433", "STM32L443", "GD32VF103", "atmega16u2", "atmega32u2", "atmega16u4", "atmega32u4", "at90usb162", "at90usb646", "at90usb647", "at90usb1286", "at90usb1287", "atmega32a", "atmega328p", "atmega328", "attiny85", "unknown"]
+            "enum": ["cortex-m0", "cortex-m0plus", "cortex-m3", "cortex-m4", "MKL26Z64", "MK20DX128", "MK20DX256", "MK66FX1M0", "STM32F042", "STM32F072", "STM32F103", "STM32F303", "STM32F401", "STM32F405", "STM32F407", "STM32F411", "STM32F446", "STM32G431", "STM32G474", "STM32L412", "STM32L422", "STM32L432", "STM32L433", "STM32L443", "GD32VF103", "atmega16u2", "atmega32u2", "atmega16u4", "atmega32u4", "at90usb162", "at90usb646", "at90usb647", "at90usb1286", "at90usb1287", "atmega32a", "atmega328p", "atmega328", "attiny85", "unknown"]
         },
         "audio": {
             "type": "object",

docs/compatible_microcontrollers.md

@@ -35,6 +35,7 @@ You can also use any ARM chip with USB that [ChibiOS](https://www.chibios.org) s
  * [STM32G474](https://www.st.com/en/microcontrollers-microprocessors/stm32g4x4.html)
  * [STM32L412](https://www.st.com/en/microcontrollers-microprocessors/stm32l4x2.html)
  * [STM32L422](https://www.st.com/en/microcontrollers-microprocessors/stm32l4x2.html)
+ * [STM32L432](https://www.st.com/en/microcontrollers-microprocessors/stm32l4x2.html)
  * [STM32L433](https://www.st.com/en/microcontrollers-microprocessors/stm32l4x3.html)
  * [STM32L443](https://www.st.com/en/microcontrollers-microprocessors/stm32l4x3.html)
 
@@ -53,4 +54,4 @@ There is limited support for one of Atmel's ATSAM microcontrollers, that being t
 
 ### GigaDevice
 
-[ChibiOS-Contrib](https://github.com/ChibiOS/ChibiOS-Contrib) has support for the GigaDevice [GD32VF103 series](https://www.gigadevice.com/products/microcontrollers/gd32/risc-v/mainstream-line/gd32vf103-series/) microcontrollers and provides configurations for the [SiPeed Longan Nano](https://longan.sipeed.com/en/) development board that uses this microcontroller. It is largely pin and feature compatible with STM32F103 and STM32F303 microcontrollers.
+[ChibiOS-Contrib](https://github.com/ChibiOS/ChibiOS-Contrib) has support for the GigaDevice [GD32VF103 series](https://www.gigadevice.com/products/microcontrollers/gd32/risc-v/mainstream-line/gd32vf103-series/) microcontrollers and provides configurations for the [SiPeed Longan Nano](https://longan.sipeed.com/en/) development board that uses this microcontroller. It is largely pin and feature compatible with STM32F103 and STM32F303 microcontrollers.

lib/python/qmk/constants.py

@@ -13,7 +13,7 @@
 MAX_KEYBOARD_SUBFOLDERS = 5
 
 # Supported processor types
-CHIBIOS_PROCESSORS = 'cortex-m0', 'cortex-m0plus', 'cortex-m3', 'cortex-m4', 'MKL26Z64', 'MK20DX128', 'MK20DX256', 'MK66FX1M0', 'STM32F042', 'STM32F072', 'STM32F103', 'STM32F303', 'STM32F401', 'STM32F407', 'STM32F411', 'STM32F446', 'STM32G431', 'STM32G474', 'STM32L412', 'STM32L422', 'STM32L433', 'STM32L443', 'GD32VF103'
+CHIBIOS_PROCESSORS = 'cortex-m0', 'cortex-m0plus', 'cortex-m3', 'cortex-m4', 'MKL26Z64', 'MK20DX128', 'MK20DX256', 'MK66FX1M0', 'STM32F042', 'STM32F072', 'STM32F103', 'STM32F303', 'STM32F401', 'STM32F407', 'STM32F411', 'STM32F446', 'STM32G431', 'STM32G474', 'STM32L412', 'STM32L422', 'STM32L432', 'STM32L433', 'STM32L443', 'GD32VF103'
 LUFA_PROCESSORS = 'at90usb162', 'atmega16u2', 'atmega32u2', 'atmega16u4', 'atmega32u4', 'at90usb646', 'at90usb647', 'at90usb1286', 'at90usb1287', None
 VUSB_PROCESSORS = 'atmega32a', 'atmega328p', 'atmega328', 'attiny85'
 

platforms/chibios/boards/GENERIC_STM32_L432KC/board/board.mk

@@ -0,0 +1,9 @@
+# List of all the board related files.
+BOARDSRC = $(CHIBIOS)/os/hal/boards/ST_NUCLEO32_L432KC/board.c
+
+# Required include directories
+BOARDINC = $(CHIBIOS)/os/hal/boards/ST_NUCLEO32_L432KC
+
+# Shared variables
+ALLCSRC += $(BOARDSRC)
+ALLINC  += $(BOARDINC)

platforms/chibios/boards/GENERIC_STM32_L432KC/configs/board.h

@@ -0,0 +1,18 @@
+/* Copyright 2021 @ lokher (https://www.keychron.com)
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+#pragma once
+
+#include_next "board.h"

platforms/chibios/boards/GENERIC_STM32_L432KC/configs/config.h

@@ -0,0 +1,27 @@
+/* Copyright 2021 @ lokher (https://www.keychron.com)
+ *
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/* Address for jumping to bootloader on STM32 chips. */
+/* It is chip dependent, the correct number can be looked up by checking against ST's application note AN2606.
+ */
+#define STM32_BOOTLOADER_ADDRESS 0x1FFF0000
+
+#define PAL_STM32_OSPEED_HIGHEST PAL_STM32_OSPEED_HIGH
+
+#ifndef EARLY_INIT_PERFORM_BOOTLOADER_JUMP
+#    define EARLY_INIT_PERFORM_BOOTLOADER_JUMP TRUE
+#endif