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commit 15caac8d24461b7dc4dd9863f2e325f980b46a35
Author: raiden00pl <[email protected]>
AuthorDate: Fri Aug 14 08:58:52 2026 +0200

    boards/stm32u0: add nucleo-u083rc support
    
    add nucleo-u083rc support
    
    Signed-off-by: raiden00pl <[email protected]>
    Assisted-by: Claude Code
---
 .../arm/stm32u0/boards/nucleo-u083rc/index.rst     |  56 ++++++
 boards/Kconfig                                     |  15 +-
 boards/arm/stm32u0/common/CMakeLists.txt           |  25 +++
 boards/arm/stm32u0/common/Kconfig                  |   6 +
 boards/arm/stm32u0/common/Makefile                 |  38 ++++
 boards/arm/stm32u0/nucleo-u083rc/CMakeLists.txt    |  23 +++
 boards/arm/stm32u0/nucleo-u083rc/Kconfig           |   8 +
 .../stm32u0/nucleo-u083rc/configs/jumbo/defconfig  |  90 +++++++++
 .../stm32u0/nucleo-u083rc/configs/nsh/defconfig    |  45 +++++
 boards/arm/stm32u0/nucleo-u083rc/include/board.h   | 209 +++++++++++++++++++++
 boards/arm/stm32u0/nucleo-u083rc/scripts/Make.defs |  37 ++++
 boards/arm/stm32u0/nucleo-u083rc/scripts/flash.ld  | 111 +++++++++++
 .../arm/stm32u0/nucleo-u083rc/src/CMakeLists.txt   |  41 ++++
 boards/arm/stm32u0/nucleo-u083rc/src/Make.defs     |  43 +++++
 .../arm/stm32u0/nucleo-u083rc/src/nucleo-u083rc.h  | 104 ++++++++++
 boards/arm/stm32u0/nucleo-u083rc/src/stm32_adc.c   | 133 +++++++++++++
 .../arm/stm32u0/nucleo-u083rc/src/stm32_autoleds.c |  82 ++++++++
 boards/arm/stm32u0/nucleo-u083rc/src/stm32_boot.c  |  83 ++++++++
 .../arm/stm32u0/nucleo-u083rc/src/stm32_bringup.c  | 156 +++++++++++++++
 .../arm/stm32u0/nucleo-u083rc/src/stm32_buttons.c  | 117 ++++++++++++
 .../arm/stm32u0/nucleo-u083rc/src/stm32_userleds.c | 165 ++++++++++++++++
 21 files changed, 1586 insertions(+), 1 deletion(-)

diff --git a/Documentation/platforms/arm/stm32u0/boards/nucleo-u083rc/index.rst 
b/Documentation/platforms/arm/stm32u0/boards/nucleo-u083rc/index.rst
new file mode 100644
index 00000000000..f686bc162f9
--- /dev/null
+++ b/Documentation/platforms/arm/stm32u0/boards/nucleo-u083rc/index.rst
@@ -0,0 +1,56 @@
+================
+ST Nucleo U083RC
+================
+
+.. tags:: chip:stm32, chip:stm32u0, chip:stm32u083
+
+The Nucleo U083RC is a member of the Nucleo-64 board family.
+
+USB not supported yet.
+
+Buttons
+=======
+
+B1 USER: the user button is connected to the I/O PC13 of the STM32
+microcontroller.
+
+Serial Console
+==============
+
+At default USART2 connected to "Virtual COM Port" is used as serial console.
+
+Configurations
+==============
+
+nsh
+---
+
+Configures the NuttShell (nsh) located at apps/examples/nsh.  The
+Configuration enables the serial interfaces on USART2.  Support for
+builtin applications is disabled.
+
+jumbo
+-----
+
+This configuration enables many Apache NuttX features.  This is
+mostly to help provide additional code coverage in CI, but also
+allows for a users to see a wide range of features that are
+supported by the OS.
+
+Enabled features:
+
+- NSH with builtin applications
+
+- OS test (ostest)
+
+- ADC with DMA enabled using A0-A3 pins
+
+- PWM on TIM1 CH1 (PA8, D7)
+
+- Quadrature encoder on TIM3 (PA6/PA7, D12/D11)
+
+- Timer driver on TIM6 (/dev/timer0)
+
+- IWDG and WWDG watchdogs
+
+- button with software debouncing enabled (no RC filter on the board)
diff --git a/boards/Kconfig b/boards/Kconfig
index b53f5edac94..d05381e3843 100644
--- a/boards/Kconfig
+++ b/boards/Kconfig
@@ -3054,6 +3054,15 @@ config ARCH_BOARD_NUCLEO_C092RC
        ---help---
                STMicro NUCLEO C092RC board based on the STMicro STM32C092RC 
MCU.
 
+config ARCH_BOARD_NUCLEO_U083RC
+       bool "STMicro Nucleo U083RC board"
+       depends on ARCH_CHIP_STM32U083RC
+       select ARCH_HAVE_LEDS
+       select ARCH_HAVE_BUTTONS
+       select ARCH_HAVE_IRQBUTTONS
+       ---help---
+               STMicro NUCLEO U083RC board based on the STMicro STM32U083RC 
MCU.
+
 config ARCH_BOARD_STM32F3_DISCOVERY
        bool "STMicro STM32F3-Discovery board"
        depends on ARCH_CHIP_STM32F303VC
@@ -4060,6 +4069,7 @@ config ARCH_BOARD
        default "stm32f072-discovery"          if ARCH_BOARD_STM32F072_DISCOVERY
        default "nucleo-c071rb"                if ARCH_BOARD_NUCLEO_C071RB
        default "nucleo-c092rc"                if ARCH_BOARD_NUCLEO_C092RC
+       default "nucleo-u083rc"                if ARCH_BOARD_NUCLEO_U083RC
        default "stm32f103-minimum"            if ARCH_BOARD_STM32F103_MINIMUM
        default "stm32f411-minimum"            if ARCH_BOARD_STM32F411_MINIMUM
        default "stm3210e-eval"                if ARCH_BOARD_STM3210E_EVAL
@@ -4665,6 +4675,9 @@ endif
 if ARCH_BOARD_NUCLEO_C092RC
 source "boards/arm/stm32c0/nucleo-c092rc/Kconfig"
 endif
+if ARCH_BOARD_NUCLEO_U083RC
+source "boards/arm/stm32u0/nucleo-u083rc/Kconfig"
+endif
 if ARCH_BOARD_NUCLEO_F722ZE
 source "boards/arm/stm32f7/nucleo-f722ze/Kconfig"
 endif
@@ -5350,7 +5363,7 @@ endif
 if ARCH_CHIP_SAMV7
 source "boards/arm/samv7/common/Kconfig"
 endif
-if ARCH_CHIP_STM32C0 || ARCH_CHIP_STM32F0 || ARCH_CHIP_STM32F1 || 
ARCH_CHIP_STM32F2 || ARCH_CHIP_STM32F3 || ARCH_CHIP_STM32F4 || 
ARCH_CHIP_STM32F7 || ARCH_CHIP_STM32G0 || ARCH_CHIP_STM32G4 || 
ARCH_CHIP_STM32L0 || ARCH_CHIP_STM32L1 || ARCH_CHIP_STM32H7 || 
ARCH_CHIP_STM32H5 || ARCH_CHIP_STM32L5 || ARCH_CHIP_STM32U5 || 
ARCH_CHIP_STM32WB || ARCH_CHIP_STM32WL5 || ARCH_CHIP_STM32N6
+if ARCH_CHIP_STM32C0 || ARCH_CHIP_STM32F0 || ARCH_CHIP_STM32F1 || 
ARCH_CHIP_STM32F2 || ARCH_CHIP_STM32F3 || ARCH_CHIP_STM32F4 || 
ARCH_CHIP_STM32F7 || ARCH_CHIP_STM32G0 || ARCH_CHIP_STM32G4 || 
ARCH_CHIP_STM32L0 || ARCH_CHIP_STM32L1 || ARCH_CHIP_STM32H7 || 
ARCH_CHIP_STM32H5 || ARCH_CHIP_STM32L5 || ARCH_CHIP_STM32U0 || 
ARCH_CHIP_STM32U5 || ARCH_CHIP_STM32WB || ARCH_CHIP_STM32WL5 || 
ARCH_CHIP_STM32N6
 source "boards/arm/common/stm32/Kconfig"
 endif
 if ARCH_CHIP_RP2040
diff --git a/boards/arm/stm32u0/common/CMakeLists.txt 
b/boards/arm/stm32u0/common/CMakeLists.txt
new file mode 100644
index 00000000000..14156a4ba83
--- /dev/null
+++ b/boards/arm/stm32u0/common/CMakeLists.txt
@@ -0,0 +1,25 @@
+# 
##############################################################################
+# boards/arm/stm32u0/common/CMakeLists.txt
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more 
contributor
+# license agreements.  See the NOTICE file distributed with this work for
+# additional information regarding copyright ownership.  The ASF licenses this
+# file to you under the Apache License, Version 2.0 (the "License"); you may 
not
+# use this file except in compliance with the License.  You may obtain a copy 
of
+# the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+# License for the specific language governing permissions and limitations under
+# the License.
+#
+# 
##############################################################################
+
+if(CONFIG_ARCH_BOARD_COMMON)
+  add_subdirectory(${NUTTX_DIR}/boards/arm/common/stm32 stm32_common)
+endif()
diff --git a/boards/arm/stm32u0/common/Kconfig 
b/boards/arm/stm32u0/common/Kconfig
new file mode 100644
index 00000000000..5c48f62a025
--- /dev/null
+++ b/boards/arm/stm32u0/common/Kconfig
@@ -0,0 +1,6 @@
+#
+# For a description of the syntax of this configuration file,
+# see the file kconfig-language.txt in the NuttX tools repository.
+#
+
+source "boards/arm/common/stm32/Kconfig"
diff --git a/boards/arm/stm32u0/common/Makefile 
b/boards/arm/stm32u0/common/Makefile
new file mode 100644
index 00000000000..4b4f416d9be
--- /dev/null
+++ b/boards/arm/stm32u0/common/Makefile
@@ -0,0 +1,38 @@
+#############################################################################
+# boards/arm/stm32u0/common/Makefile
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.  The
+# ASF licenses this file to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance with the
+# License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+# License for the specific language governing permissions and limitations
+# under the License.
+#
+#############################################################################
+
+include $(TOPDIR)/Make.defs
+
+STM32_BOARD_COMMON_DIR := 
$(TOPDIR)$(DELIM)boards$(DELIM)arm$(DELIM)common$(DELIM)stm32
+STM32_COMMON_SRCDIR := 
$(TOPDIR)$(DELIM)arch$(DELIM)$(CONFIG_ARCH)$(DELIM)src$(DELIM)common$(DELIM)stm32
+
+include board/Make.defs
+include $(STM32_BOARD_COMMON_DIR)$(DELIM)src$(DELIM)Make.defs
+
+DEPPATH += --dep-path board
+
+include $(TOPDIR)/boards/Board.mk
+
+ARCHSRCDIR = $(TOPDIR)$(DELIM)arch$(DELIM)$(CONFIG_ARCH)$(DELIM)src
+BOARDDIR = $(ARCHSRCDIR)$(DELIM)board
+CFLAGS += ${INCDIR_PREFIX}$(BOARDDIR)$(DELIM)include
+CFLAGS += ${INCDIR_PREFIX}$(STM32_COMMON_SRCDIR)
diff --git a/boards/arm/stm32u0/nucleo-u083rc/CMakeLists.txt 
b/boards/arm/stm32u0/nucleo-u083rc/CMakeLists.txt
new file mode 100644
index 00000000000..e9d15dd95de
--- /dev/null
+++ b/boards/arm/stm32u0/nucleo-u083rc/CMakeLists.txt
@@ -0,0 +1,23 @@
+# 
##############################################################################
+# boards/arm/stm32u0/nucleo-u083rc/CMakeLists.txt
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more 
contributor
+# license agreements.  See the NOTICE file distributed with this work for
+# additional information regarding copyright ownership.  The ASF licenses this
+# file to you under the Apache License, Version 2.0 (the "License"); you may 
not
+# use this file except in compliance with the License.  You may obtain a copy 
of
+# the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+# License for the specific language governing permissions and limitations under
+# the License.
+#
+# 
##############################################################################
+
+add_subdirectory(src)
diff --git a/boards/arm/stm32u0/nucleo-u083rc/Kconfig 
b/boards/arm/stm32u0/nucleo-u083rc/Kconfig
new file mode 100644
index 00000000000..1a6d9ae73e4
--- /dev/null
+++ b/boards/arm/stm32u0/nucleo-u083rc/Kconfig
@@ -0,0 +1,8 @@
+#
+# For a description of the syntax of this configuration file,
+# see the file kconfig-language.txt in the NuttX tools repository.
+#
+
+if ARCH_BOARD_NUCLEO_U083RC
+
+endif
diff --git a/boards/arm/stm32u0/nucleo-u083rc/configs/jumbo/defconfig 
b/boards/arm/stm32u0/nucleo-u083rc/configs/jumbo/defconfig
new file mode 100644
index 00000000000..84ec84ee4d6
--- /dev/null
+++ b/boards/arm/stm32u0/nucleo-u083rc/configs/jumbo/defconfig
@@ -0,0 +1,90 @@
+#
+# This file is autogenerated: PLEASE DO NOT EDIT IT.
+#
+# You can use "make menuconfig" to make any modifications to the installed 
.config file.
+# You can then do "make savedefconfig" to generate a new defconfig file that 
includes your
+# modifications.
+#
+CONFIG_ADC=y
+CONFIG_ANALOG=y
+CONFIG_ARCH="arm"
+CONFIG_ARCH_BOARD="nucleo-u083rc"
+CONFIG_ARCH_BOARD_COMMON=y
+CONFIG_ARCH_BOARD_NUCLEO_U083RC=y
+CONFIG_ARCH_BUTTONS=y
+CONFIG_ARCH_CHIP="stm32u0"
+CONFIG_ARCH_CHIP_STM32=y
+CONFIG_ARCH_CHIP_STM32U083RC=y
+CONFIG_ARCH_CHIP_STM32U0=y
+CONFIG_ARCH_IRQBUTTONS=y
+CONFIG_ARCH_STACKDUMP=y
+CONFIG_BOARDCTL=y
+CONFIG_BOARD_LOOPSPERMSEC=4663
+CONFIG_BUILTIN=y
+CONFIG_DEBUG_FEATURES=y
+CONFIG_DEBUG_FULLOPT=y
+CONFIG_DEBUG_SYMBOLS=y
+CONFIG_DISABLE_ENVIRON=y
+CONFIG_DISABLE_MOUNTPOINT=y
+CONFIG_DISABLE_MQUEUE=y
+CONFIG_DISABLE_POSIX_TIMERS=y
+CONFIG_DISABLE_PSEUDOFS_OPERATIONS=y
+CONFIG_EXAMPLES_ADC=y
+CONFIG_EXAMPLES_ADC_GROUPSIZE=2
+CONFIG_EXAMPLES_ADC_SWTRIG=y
+CONFIG_EXAMPLES_BUTTONS=y
+CONFIG_EXAMPLES_HELLO=y
+CONFIG_EXAMPLES_PWM=y
+CONFIG_EXAMPLES_QENCODER=y
+CONFIG_EXAMPLES_TIMER=y
+CONFIG_EXAMPLES_WATCHDOG=y
+CONFIG_INIT_ENTRYPOINT="nsh_main"
+CONFIG_INIT_STACKSIZE=1536
+CONFIG_INPUT=y
+CONFIG_INPUT_BUTTONS=y
+CONFIG_INPUT_BUTTONS_DEBOUNCE_DELAY=10
+CONFIG_INPUT_BUTTONS_LOWER=y
+CONFIG_INTELHEX_BINARY=y
+CONFIG_LINE_MAX=64
+CONFIG_NFILE_DESCRIPTORS_PER_BLOCK=6
+CONFIG_NSH_BUILTIN_APPS=y
+CONFIG_NSH_FILEIOSIZE=64
+CONFIG_NSH_READLINE=y
+CONFIG_NUNGET_CHARS=0
+CONFIG_POSIX_SPAWN_DEFAULT_STACKSIZE=1536
+CONFIG_PTHREAD_MUTEX_UNSAFE=y
+CONFIG_PTHREAD_STACK_DEFAULT=1536
+CONFIG_PWM=y
+CONFIG_RAM_SIZE=40960
+CONFIG_RAM_START=0x20000000
+CONFIG_RAW_BINARY=y
+CONFIG_RR_INTERVAL=200
+CONFIG_SCHED_WAITPID=y
+CONFIG_SENSORS=y
+CONFIG_SENSORS_QENCODER=y
+CONFIG_SERIAL_TERMIOS=y
+CONFIG_START_DAY=19
+CONFIG_START_MONTH=5
+CONFIG_START_YEAR=2013
+CONFIG_STDIO_DISABLE_BUFFERING=y
+CONFIG_STM32_ADC1=y
+CONFIG_STM32_ADC_MAX_SAMPLES=4
+CONFIG_STM32_DMA1=y
+CONFIG_STM32_IWDG=y
+CONFIG_STM32_PWM_MULTICHAN=y
+CONFIG_STM32_PWR=y
+CONFIG_STM32_TIM1=y
+CONFIG_STM32_TIM1_CH1OUT=y
+CONFIG_STM32_TIM1_CHANNEL1=y
+CONFIG_STM32_TIM1_PWM=y
+CONFIG_STM32_TIM3=y
+CONFIG_STM32_TIM3_QE=y
+CONFIG_STM32_TIM6=y
+CONFIG_STM32_USART2=y
+CONFIG_STM32_WWDG=y
+CONFIG_SYSTEM_NSH=y
+CONFIG_TASK_NAME_SIZE=0
+CONFIG_TESTING_OSTEST=y
+CONFIG_TESTING_OSTEST_STACKSIZE=3072
+CONFIG_TIMER=y
+CONFIG_USART2_SERIAL_CONSOLE=y
diff --git a/boards/arm/stm32u0/nucleo-u083rc/configs/nsh/defconfig 
b/boards/arm/stm32u0/nucleo-u083rc/configs/nsh/defconfig
new file mode 100644
index 00000000000..5f6c73b7ac2
--- /dev/null
+++ b/boards/arm/stm32u0/nucleo-u083rc/configs/nsh/defconfig
@@ -0,0 +1,45 @@
+#
+# This file is autogenerated: PLEASE DO NOT EDIT IT.
+#
+# You can use "make menuconfig" to make any modifications to the installed 
.config file.
+# You can then do "make savedefconfig" to generate a new defconfig file that 
includes your
+# modifications.
+#
+CONFIG_ARCH="arm"
+CONFIG_ARCH_BOARD="nucleo-u083rc"
+CONFIG_ARCH_BOARD_NUCLEO_U083RC=y
+CONFIG_ARCH_BUTTONS=y
+CONFIG_ARCH_CHIP="stm32u0"
+CONFIG_ARCH_CHIP_STM32=y
+CONFIG_ARCH_CHIP_STM32U083RC=y
+CONFIG_ARCH_CHIP_STM32U0=y
+CONFIG_ARCH_IRQBUTTONS=y
+CONFIG_ARCH_STACKDUMP=y
+CONFIG_BOARD_LOOPSPERMSEC=4663
+CONFIG_DEBUG_FULLOPT=y
+CONFIG_DEBUG_SYMBOLS=y
+CONFIG_INIT_ENTRYPOINT="nsh_main"
+CONFIG_INIT_STACKSIZE=1536
+CONFIG_INTELHEX_BINARY=y
+CONFIG_LINE_MAX=64
+CONFIG_NFILE_DESCRIPTORS_PER_BLOCK=6
+CONFIG_NSH_FILEIOSIZE=64
+CONFIG_NSH_READLINE=y
+CONFIG_NUNGET_CHARS=0
+CONFIG_POSIX_SPAWN_DEFAULT_STACKSIZE=1536
+CONFIG_PTHREAD_MUTEX_UNSAFE=y
+CONFIG_PTHREAD_STACK_DEFAULT=1536
+CONFIG_RAM_SIZE=40960
+CONFIG_RAM_START=0x20000000
+CONFIG_RAW_BINARY=y
+CONFIG_RR_INTERVAL=200
+CONFIG_SCHED_WAITPID=y
+CONFIG_START_DAY=19
+CONFIG_START_MONTH=5
+CONFIG_START_YEAR=2013
+CONFIG_STDIO_DISABLE_BUFFERING=y
+CONFIG_STM32_PWR=y
+CONFIG_STM32_USART2=y
+CONFIG_SYSTEM_NSH=y
+CONFIG_TASK_NAME_SIZE=0
+CONFIG_USART2_SERIAL_CONSOLE=y
diff --git a/boards/arm/stm32u0/nucleo-u083rc/include/board.h 
b/boards/arm/stm32u0/nucleo-u083rc/include/board.h
new file mode 100644
index 00000000000..6ebea33bd51
--- /dev/null
+++ b/boards/arm/stm32u0/nucleo-u083rc/include/board.h
@@ -0,0 +1,209 @@
+/****************************************************************************
+ * boards/arm/stm32u0/nucleo-u083rc/include/board.h
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+#ifndef __BOARDS_ARM_STM32U0_NUCLEO_U083RC_INCLUDE_BOARD_H
+#define __BOARDS_ARM_STM32U0_NUCLEO_U083RC_INCLUDE_BOARD_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#ifndef __ASSEMBLY__
+#  include <stdint.h>
+#endif
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/* Clocking *****************************************************************/
+
+/* HSI - Internal 16 MHz RC Oscillator
+ * MSI - Internal multispeed RC Oscillator (100 kHz - 48 MHz)
+ * LSI - 32 kHz RC
+ * HSE - 8 MHz from MCO output of ST-LINK (not fitted by default)
+ * LSE - 32.768 kHz
+ */
+
+#define STM32_BOARD_XTAL        8000000ul          /* 8MHz */
+
+#define STM32_HSI_FREQUENCY     16000000ul         /* 16MHz */
+#define STM32_LSI_FREQUENCY     32000              /* Between 30kHz and 60kHz 
*/
+#define STM32_HSE_FREQUENCY     STM32_BOARD_XTAL
+#define STM32_LSE_FREQUENCY     32768              /* X2 on board */
+
+/* PLL configuration
+ *
+ *   PLL source is HSI16
+ *   VCO input frequency  = 16 MHz / PLLM = 16 MHz (must be 2.66 - 16 MHz)
+ *   VCO output frequency = 16 MHz * PLLN = 112 MHz (must be 96 - 344 MHz)
+ *   PLLP output          = 112 MHz / PLLP = 56 MHz
+ *   PLLQ output          = 112 MHz / PLLQ = 56 MHz
+ *   PLLR output (SYSCLK) = 112 MHz / PLLR = 56 MHz
+ */
+
+#define STM32_PLLCFG_PLLSRC     RCC_PLLCFG_PLLSRC_HSI
+#define STM32_PLLCFG_PLLCFG     (RCC_PLLCFG_PLLPEN | RCC_PLLCFG_PLLREN)
+
+#define STM32_PLLCFG_PLLM       RCC_PLLCFG_PLLM(1)
+#define STM32_PLLCFG_PLLN       RCC_PLLCFG_PLLN(7)
+#define STM32_PLLCFG_PLLP       RCC_PLLCFG_PLLP(2)
+#define STM32_PLLCFG_PLLQ       RCC_PLLCFG_PLLQ(2)
+#define STM32_PLLCFG_PLLR       RCC_PLLCFG_PLLR(2)
+
+#define STM32_VCO_FREQUENCY     ((STM32_HSI_FREQUENCY / 1) * 7)
+#define STM32_PLLP_FREQUENCY    (STM32_VCO_FREQUENCY / 2)
+#define STM32_PLLQ_FREQUENCY    (STM32_VCO_FREQUENCY / 2)
+#define STM32_PLLR_FREQUENCY    (STM32_VCO_FREQUENCY / 2)
+
+/* Use the PLL as SYSCLK source (56 MHz) */
+
+#define STM32_SYSCLK_SW         RCC_CFGR_SW_PLL
+#define STM32_SYSCLK_SWS        RCC_CFGR_SWS_PLL
+#define STM32_SYSCLK_FREQUENCY  STM32_PLLR_FREQUENCY
+
+/* AHB clock (HCLK) is SYSCLK (56 MHz) */
+
+#define STM32_RCC_CFGR_HPRE     RCC_CFGR_HPRE_SYSCLK
+#define STM32_HCLK_FREQUENCY    STM32_SYSCLK_FREQUENCY
+
+/* APB clock (PCLK) is HCLK (56 MHz) */
+
+#define STM32_RCC_CFGR_PPRE1    RCC_CFGR_PPRE1_HCLK
+#define STM32_PCLK1_FREQUENCY   STM32_HCLK_FREQUENCY
+#define STM32_PCLK2_FREQUENCY   STM32_PCLK1_FREQUENCY
+
+/* All timers on PCLK x1 (56 MHz) */
+
+#define STM32_TIM1_CLKIN   STM32_PCLK1_FREQUENCY
+#define STM32_TIM2_CLKIN   STM32_PCLK1_FREQUENCY
+#define STM32_TIM3_CLKIN   STM32_PCLK1_FREQUENCY
+#define STM32_TIM6_CLKIN   STM32_PCLK1_FREQUENCY
+#define STM32_TIM7_CLKIN   STM32_PCLK1_FREQUENCY
+#define STM32_TIM15_CLKIN  STM32_PCLK1_FREQUENCY
+#define STM32_TIM16_CLKIN  STM32_PCLK1_FREQUENCY
+
+/* LED definitions **********************************************************/
+
+/* The Nucleo U083RC board has three LEDs.  Two of these are controlled by
+ * logic on the board and are not available for software control:
+ *
+ *   LD1 COM:    LD1 is yellow-green and controlled by the ST-LINK.
+ *   LD3 PWR:    red LED indicates that the board is powered.
+ *
+ * And one can be controlled by software:
+ *
+ *   User LD4:   green LED is a user LED connected to the I/O PA5.
+ */
+
+/* LED index values for use with board_userled() */
+
+#define BOARD_LED1       0 /* User LD4 */
+#define BOARD_NLEDS      1
+
+/* LED bits for use with board_userled_all() */
+
+#define BOARD_LED1_BIT   (1 << BOARD_LED1)
+
+/* If CONFIG_ARCH_LEDs is defined, then NuttX will control the LED on the
+ * board. The following definitions describe how NuttX controls
+ * the LED:
+ *
+ *   SYMBOL              Meaning                  LED1 state
+ *   ------------------  -----------------------  ----------
+ *   LED_STARTED         NuttX has been started   OFF
+ *   LED_HEAPALLOCATE    Heap has been allocated  OFF
+ *   LED_IRQSENABLED     Interrupts enabled       OFF
+ *   LED_STACKCREATED    Idle stack created       ON
+ *   LED_INIRQ           In an interrupt          No change
+ *   LED_SIGNAL          In a signal handler      No change
+ *   LED_ASSERTION       An assertion failed      No change
+ *   LED_PANIC           The system has crashed   Blinking
+ *   LED_IDLE            STM32 is in sleep mode   Not used
+ */
+
+#define LED_STARTED      0
+#define LED_HEAPALLOCATE 0
+#define LED_IRQSENABLED  0
+#define LED_STACKCREATED 1
+#define LED_INIRQ        2
+#define LED_SIGNAL       2
+#define LED_ASSERTION    2
+#define LED_PANIC        1
+
+/* Button definitions *******************************************************/
+
+/* Nucleo U083RC board supports two buttons; only one button is controllable
+ * by software:
+ *
+ *   B1 USER:  user button connected to STM32 I/O PC13.
+ *   B2 RESET: push button connected to NRST; used to RESET the MCU.
+ */
+
+#define BUTTON_USER      0  /* User B1 */
+#define NUM_BUTTONS      1
+
+#define BUTTON_USER_BIT  (1 << BUTTON_USER)
+
+/* Alternate function pin selections ****************************************/
+
+/* USART */
+
+/* USART1 at arduino D0/D1:
+ *   USART1_RX - PB7
+ *   USART1_TX - PB6
+ */
+
+#define GPIO_USART1_RX      (GPIO_USART1_RX_2|GPIO_SPEED_HIGH)    /* PB7 */
+#define GPIO_USART1_TX      (GPIO_USART1_TX_2|GPIO_SPEED_HIGH)    /* PB6 */
+
+/* By default the USART2 is connected to STLINK Virtual COM Port:
+ *   USART2_RX - PA3
+ *   USART2_TX - PA2
+ */
+
+#define GPIO_USART2_RX      (GPIO_USART2_RX_1|GPIO_SPEED_HIGH)    /* PA3 */
+#define GPIO_USART2_TX      (GPIO_USART2_TX_1|GPIO_SPEED_HIGH)    /* PA2 */
+
+/* PWM on TIM1:
+ *   TIM1_CH1 - PA8 (D7)
+ */
+
+#define GPIO_TIM1_CH1OUT    (GPIO_TIM1_CH1OUT_1|GPIO_SPEED_HIGH)  /* PA8 */
+
+/* Qencoder on TIM3:
+ *   TIM3_CH1IN - PA6 (D12)
+ *   TIM3_CH2IN - PA7 (D11)
+ */
+
+#define GPIO_TIM3_CH1IN     (GPIO_TIM3_CH1IN_1|GPIO_SPEED_HIGH)   /* PA6 */
+#define GPIO_TIM3_CH2IN     (GPIO_TIM3_CH2IN_1|GPIO_SPEED_HIGH)   /* PA7 */
+
+/* DMA channels *************************************************************/
+
+/* ADC */
+
+#define ADC1_DMA_CHAN DMAMAP_DMA1_ADC1     /* DMA1 */
+
+#endif /* __BOARDS_ARM_STM32U0_NUCLEO_U083RC_INCLUDE_BOARD_H */
diff --git a/boards/arm/stm32u0/nucleo-u083rc/scripts/Make.defs 
b/boards/arm/stm32u0/nucleo-u083rc/scripts/Make.defs
new file mode 100644
index 00000000000..814e9dae238
--- /dev/null
+++ b/boards/arm/stm32u0/nucleo-u083rc/scripts/Make.defs
@@ -0,0 +1,37 @@
+############################################################################
+# boards/arm/stm32u0/nucleo-u083rc/scripts/Make.defs
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.  The
+# ASF licenses this file to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance with the
+# License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+# License for the specific language governing permissions and limitations
+# under the License.
+#
+############################################################################
+
+include $(TOPDIR)/.config
+include $(TOPDIR)/tools/Config.mk
+include $(TOPDIR)/arch/arm/src/armv6-m/Toolchain.defs
+
+LDSCRIPT = flash.ld
+ARCHSCRIPT += $(BOARD_DIR)$(DELIM)scripts$(DELIM)$(LDSCRIPT)
+
+CFLAGS := $(ARCHCFLAGS) $(ARCHOPTIMIZATION) $(ARCHCPUFLAGS) $(ARCHINCLUDES) 
$(ARCHDEFINES) $(EXTRAFLAGS)
+CXXFLAGS := $(ARCHCXXFLAGS) $(ARCHOPTIMIZATION) $(ARCHCPUFLAGS) 
$(ARCHXXINCLUDES) $(ARCHDEFINES) $(EXTRAFLAGS)
+CPPFLAGS := $(ARCHINCLUDES) $(ARCHDEFINES) $(EXTRAFLAGS)
+AFLAGS := $(CFLAGS) -D__ASSEMBLY__
+
+NXFLATLDFLAGS1 = -r -d -warn-common
+NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) 
-T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat-pcrel.ld -no-check-sections
+LDNXFLATFLAGS = -e main -s 2048
diff --git a/boards/arm/stm32u0/nucleo-u083rc/scripts/flash.ld 
b/boards/arm/stm32u0/nucleo-u083rc/scripts/flash.ld
new file mode 100644
index 00000000000..5bf02e498f8
--- /dev/null
+++ b/boards/arm/stm32u0/nucleo-u083rc/scripts/flash.ld
@@ -0,0 +1,111 @@
+/****************************************************************************
+ * boards/arm/stm32u0/nucleo-u083rc/scripts/flash.ld
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/* The STM32U083RCT6 has 256KB of FLASH beginning at address 0x0800:0000 and
+ * 40Kb of SRAM at address 0x20000000 (32Kb SRAM1 + 8Kb backup SRAM2).
+ *
+ * When booting from FLASH, FLASH memory is aliased to address 0x0000:0000
+ * where the code expects to begin execution by jumping to the entry point in
+ * the 0x0800:0000 address range.
+ */
+
+MEMORY
+{
+  flash (rx) : ORIGIN = 0x08000000, LENGTH = 256K
+  sram (rwx) : ORIGIN = 0x20000000, LENGTH = 40K
+}
+
+OUTPUT_ARCH(arm)
+EXTERN(_vectors)
+ENTRY(_stext)
+
+SECTIONS
+{
+    .text :
+    {
+        _stext = ABSOLUTE(.);
+        *(.vectors)
+        *(.text .text.*)
+        *(.fixup)
+        *(.gnu.warning)
+        *(.rodata .rodata.*)
+        *(.gnu.linkonce.t.*)
+        *(.glue_7)
+        *(.glue_7t)
+        *(.got)
+        *(.gcc_except_table)
+        *(.gnu.linkonce.r.*)
+        _etext = ABSOLUTE(.);
+    } > flash
+
+    .init_section : ALIGN(4) {
+        _sinit = ABSOLUTE(.);
+        KEEP(*(SORT_BY_INIT_PRIORITY(.init_array.*) 
SORT_BY_INIT_PRIORITY(.ctors.*)))
+        KEEP(*(.init_array EXCLUDE_FILE(*crtbegin.o *crtbegin?.o *crtend.o 
*crtend?.o) .ctors))
+        _einit = ABSOLUTE(.);
+    } > flash
+
+    .ARM.extab ALIGN(4): {
+        *(.ARM.extab*)
+    } > flash
+
+    .ARM.exidx : ALIGN(4) {
+        __exidx_start = ABSOLUTE(.);
+        *(.ARM.exidx*)
+        __exidx_end = ABSOLUTE(.);
+    } > flash
+
+    _eronly = ABSOLUTE(.);
+
+    .data : ALIGN(4) {
+        _sdata = ABSOLUTE(.);
+        *(.data .data.*)
+        *(.gnu.linkonce.d.*)
+        CONSTRUCTORS
+        . = ALIGN(4);
+        _edata = ABSOLUTE(.);
+    } > sram AT > flash
+
+    .bss : ALIGN(4) {
+        _sbss = ABSOLUTE(.);
+        *(.bss .bss.*)
+        *(.gnu.linkonce.b.*)
+        *(COMMON)
+        . = ALIGN(8);
+        _ebss = ABSOLUTE(.);
+    } > sram
+
+    /* Stabs debugging sections. */
+
+    .stab 0 : { *(.stab) }
+    .stabstr 0 : { *(.stabstr) }
+    .stab.excl 0 : { *(.stab.excl) }
+    .stab.exclstr 0 : { *(.stab.exclstr) }
+    .stab.index 0 : { *(.stab.index) }
+    .stab.indexstr 0 : { *(.stab.indexstr) }
+    .comment 0 : { *(.comment) }
+    .debug_abbrev 0 : { *(.debug_abbrev) }
+    .debug_info 0 : { *(.debug_info) }
+    .debug_line 0 : { *(.debug_line) }
+    .debug_pubnames 0 : { *(.debug_pubnames) }
+    .debug_aranges 0 : { *(.debug_aranges) }
+}
diff --git a/boards/arm/stm32u0/nucleo-u083rc/src/CMakeLists.txt 
b/boards/arm/stm32u0/nucleo-u083rc/src/CMakeLists.txt
new file mode 100644
index 00000000000..c9d04cf601e
--- /dev/null
+++ b/boards/arm/stm32u0/nucleo-u083rc/src/CMakeLists.txt
@@ -0,0 +1,41 @@
+# 
##############################################################################
+# boards/arm/stm32u0/nucleo-u083rc/src/CMakeLists.txt
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more 
contributor
+# license agreements.  See the NOTICE file distributed with this work for
+# additional information regarding copyright ownership.  The ASF licenses this
+# file to you under the Apache License, Version 2.0 (the "License"); you may 
not
+# use this file except in compliance with the License.  You may obtain a copy 
of
+# the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+# License for the specific language governing permissions and limitations under
+# the License.
+#
+# 
##############################################################################
+
+set(SRCS stm32_boot.c stm32_bringup.c)
+
+if(CONFIG_ARCH_LEDS)
+  list(APPEND SRCS stm32_autoleds.c)
+else()
+  list(APPEND SRCS stm32_userleds.c)
+endif()
+
+if(CONFIG_ARCH_BUTTONS)
+  list(APPEND SRCS stm32_buttons.c)
+endif()
+
+if(CONFIG_ADC)
+  list(APPEND SRCS stm32_adc.c)
+endif()
+
+target_sources(board PRIVATE ${SRCS})
+
+set_property(GLOBAL PROPERTY LD_SCRIPT "${NUTTX_BOARD_DIR}/scripts/flash.ld")
diff --git a/boards/arm/stm32u0/nucleo-u083rc/src/Make.defs 
b/boards/arm/stm32u0/nucleo-u083rc/src/Make.defs
new file mode 100644
index 00000000000..4d854dfee66
--- /dev/null
+++ b/boards/arm/stm32u0/nucleo-u083rc/src/Make.defs
@@ -0,0 +1,43 @@
+############################################################################
+# boards/arm/stm32u0/nucleo-u083rc/src/Make.defs
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.  The
+# ASF licenses this file to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance with the
+# License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+# License for the specific language governing permissions and limitations
+# under the License.
+#
+############################################################################
+
+include $(TOPDIR)/Make.defs
+
+CSRCS = stm32_boot.c stm32_bringup.c
+
+ifeq ($(CONFIG_ARCH_LEDS),y)
+CSRCS += stm32_autoleds.c
+else
+CSRCS += stm32_userleds.c
+endif
+
+ifeq ($(CONFIG_ARCH_BUTTONS),y)
+CSRCS += stm32_buttons.c
+endif
+
+ifeq ($(CONFIG_ADC),y)
+CSRCS += stm32_adc.c
+endif
+
+DEPPATH += --dep-path board
+VPATH += :board
+CFLAGS += 
${INCDIR_PREFIX}$(TOPDIR)$(DELIM)arch$(DELIM)$(CONFIG_ARCH)$(DELIM)src$(DELIM)board$(DELIM)board
diff --git a/boards/arm/stm32u0/nucleo-u083rc/src/nucleo-u083rc.h 
b/boards/arm/stm32u0/nucleo-u083rc/src/nucleo-u083rc.h
new file mode 100644
index 00000000000..a0196d7ade4
--- /dev/null
+++ b/boards/arm/stm32u0/nucleo-u083rc/src/nucleo-u083rc.h
@@ -0,0 +1,104 @@
+/****************************************************************************
+ * boards/arm/stm32u0/nucleo-u083rc/src/nucleo-u083rc.h
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+#ifndef __BOARDS_ARM_STM32U0_NUCLEO_U083RC_SRC_NUCLEO_U083RC_H
+#define __BOARDS_ARM_STM32U0_NUCLEO_U083RC_SRC_NUCLEO_U083RC_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+#include <nuttx/compiler.h>
+#include <stdint.h>
+
+#include "stm32_gpio.h"
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/* Nucleo-U083RC GPIOs ******************************************************/
+
+/* User LED:
+ *  LD4 - PA5
+ */
+
+#define GPIO_LD4        (GPIO_OUTPUT | GPIO_PUSHPULL | GPIO_SPEED_MEDIUM | \
+                         GPIO_OUTPUT_CLEAR | GPIO_PORTA | GPIO_PIN5)
+
+#define LED_DRIVER_PATH "/dev/userleds"
+
+/* Button definitions *******************************************************/
+
+/*   B1 USER: the user button is connected to the I/O PC13 (pin 2) of the
+ *   STM32 microcontroller.
+ */
+
+#define MIN_IRQBUTTON   BUTTON_USER
+#define MAX_IRQBUTTON   BUTTON_USER
+#define NUM_IRQBUTTONS  1
+
+#define GPIO_BTN_USER   (GPIO_INPUT | GPIO_PULLUP | GPIO_EXTI | \
+                         GPIO_PORTC | GPIO_PIN13)
+
+/****************************************************************************
+ * Public Types
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Data
+ ****************************************************************************/
+
+#ifndef __ASSEMBLY__
+
+/****************************************************************************
+ * Public Functions Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: stm32_bringup
+ *
+ * Description:
+ *   Perform architecture-specific initialization
+ *
+ *   CONFIG_BOARD_LATE_INITIALIZE=y :
+ *     Called from board_late_initialize().
+ *
+ ****************************************************************************/
+
+int stm32_bringup(void);
+
+/****************************************************************************
+ * Name: stm32_adc_setup
+ *
+ * Description:
+ *   Initialize ADC and register the ADC driver.
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_ADC
+int stm32_adc_setup(void);
+#endif
+
+#endif /* __ASSEMBLY__ */
+#endif /* __BOARDS_ARM_STM32U0_NUCLEO_U083RC_SRC_NUCLEO_U083RC_H */
diff --git a/boards/arm/stm32u0/nucleo-u083rc/src/stm32_adc.c 
b/boards/arm/stm32u0/nucleo-u083rc/src/stm32_adc.c
new file mode 100644
index 00000000000..df993ff445b
--- /dev/null
+++ b/boards/arm/stm32u0/nucleo-u083rc/src/stm32_adc.c
@@ -0,0 +1,133 @@
+/****************************************************************************
+ * boards/arm/stm32u0/nucleo-u083rc/src/stm32_adc.c
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdbool.h>
+#include <errno.h>
+#include <nuttx/debug.h>
+
+#include <arch/board/board.h>
+
+#include <nuttx/analog/adc.h>
+
+#include "stm32.h"
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/* Configuration ************************************************************/
+
+/* The number of ADC channels in the conversion list */
+
+#define ADC1_NCHANNELS 4
+
+/****************************************************************************
+ * Private Function Prototypes
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/* Identifying number of each ADC channel (even if NCHANNELS is less ) */
+
+static const uint8_t g_chanlist1[ADC1_NCHANNELS] =
+{
+  4,
+  5,
+  8,
+  17,
+};
+
+/* Configurations of pins used by each ADC channel */
+
+static const uint32_t g_pinlist1[ADC1_NCHANNELS]  =
+{
+  GPIO_ADC1_IN4_1,                /* PA0/A0 */
+  GPIO_ADC1_IN5_1,                /* PA1/A1 */
+  GPIO_ADC1_IN8_1,                /* PA4/A2 */
+  GPIO_ADC1_IN17_1,               /* PB0/A3 */
+};
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: stm32_adc_setup
+ *
+ * Description:
+ *   Initialize ADC and register the ADC driver.
+ *
+ ****************************************************************************/
+
+int stm32_adc_setup(void)
+{
+  static bool initialized = false;
+  struct adc_dev_s *adc;
+  int ret;
+  int i;
+
+  /* Check if we have already initialized */
+
+  if (!initialized)
+    {
+      /* Configure the pins as analog inputs for the selected channels */
+
+      for (i = 0; i < ADC1_NCHANNELS; i++)
+        {
+          stm32_configgpio(g_pinlist1[i]);
+        }
+
+      /* Call stm32_adcinitialize() to get an instance of the ADC interface */
+
+      adc = stm32_adcinitialize(1, g_chanlist1, ADC1_NCHANNELS);
+      if (adc == NULL)
+        {
+          aerr("ERROR: Failed to get ADC interface 1\n");
+          return -ENODEV;
+        }
+
+      /* Register the ADC driver at "/dev/adc0" */
+
+      ret = adc_register("/dev/adc0", adc);
+      if (ret < 0)
+        {
+          aerr("ERROR: adc_register /dev/adc0 failed: %d\n", ret);
+          return ret;
+        }
+
+      initialized = true;
+    }
+
+  return OK;
+}
diff --git a/boards/arm/stm32u0/nucleo-u083rc/src/stm32_autoleds.c 
b/boards/arm/stm32u0/nucleo-u083rc/src/stm32_autoleds.c
new file mode 100644
index 00000000000..3b97c0e07ef
--- /dev/null
+++ b/boards/arm/stm32u0/nucleo-u083rc/src/stm32_autoleds.c
@@ -0,0 +1,82 @@
+/****************************************************************************
+ * boards/arm/stm32u0/nucleo-u083rc/src/stm32_autoleds.c
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <nuttx/debug.h>
+
+#include <nuttx/board.h>
+#include <arch/board/board.h>
+
+#include "chip.h"
+#include "arm_internal.h"
+#include "stm32_gpio.h"
+#include "nucleo-u083rc.h"
+
+#ifdef CONFIG_ARCH_LEDS
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: board_autoled_initialize
+ ****************************************************************************/
+
+void board_autoled_initialize(void)
+{
+  /* Configure LD4 GPIO for output */
+
+  stm32_configgpio(GPIO_LD4);
+}
+
+/****************************************************************************
+ * Name: board_autoled_on
+ ****************************************************************************/
+
+void board_autoled_on(int led)
+{
+  if (led == BOARD_LED1)
+    {
+      stm32_gpiowrite(GPIO_LD4, true);
+    }
+}
+
+/****************************************************************************
+ * Name: board_autoled_off
+ ****************************************************************************/
+
+void board_autoled_off(int led)
+{
+  if (led == BOARD_LED1)
+    {
+      stm32_gpiowrite(GPIO_LD4, false);
+    }
+}
+
+#endif /* CONFIG_ARCH_LEDS */
diff --git a/boards/arm/stm32u0/nucleo-u083rc/src/stm32_boot.c 
b/boards/arm/stm32u0/nucleo-u083rc/src/stm32_boot.c
new file mode 100644
index 00000000000..162bbbcd321
--- /dev/null
+++ b/boards/arm/stm32u0/nucleo-u083rc/src/stm32_boot.c
@@ -0,0 +1,83 @@
+/****************************************************************************
+ * boards/arm/stm32u0/nucleo-u083rc/src/stm32_boot.c
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <nuttx/board.h>
+#include <arch/board/board.h>
+
+#include "nucleo-u083rc.h"
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: stm32_boardinitialize
+ *
+ * Description:
+ *   All STM32 architectures must provide the following entry point.  This
+ *   entry point is called early in the initialization -- after all memory
+ *   has been configured and mapped but before any devices have been
+ *   initialized.
+ *
+ ****************************************************************************/
+
+void stm32_boardinitialize(void)
+{
+#ifdef CONFIG_ARCH_LEDS
+  /* Configure on-board LEDs if LED support has been selected. */
+
+  board_autoled_initialize();
+#endif
+
+#ifdef CONFIG_STM32_SPI
+  /* Configure SPI chip selects */
+
+  stm32_spidev_initialize();
+#endif
+}
+
+/****************************************************************************
+ * Name: board_late_initialize
+ *
+ * Description:
+ *   If CONFIG_BOARD_LATE_INITIALIZE is selected, then an additional
+ *   initialization call will be performed in the boot-up sequence to a
+ *   function called board_late_initialize().  board_late_initialize() will
+ *   be called immediately after up_initialize() is called and just before
+ *   the initial application is started.  This additional initialization
+ *   phase may be used, for example, to initialize board-specific device
+ *   drivers.
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_BOARD_LATE_INITIALIZE
+void board_late_initialize(void)
+{
+  stm32_bringup();
+}
+#endif
diff --git a/boards/arm/stm32u0/nucleo-u083rc/src/stm32_bringup.c 
b/boards/arm/stm32u0/nucleo-u083rc/src/stm32_bringup.c
new file mode 100644
index 00000000000..b51ab8a172d
--- /dev/null
+++ b/boards/arm/stm32u0/nucleo-u083rc/src/stm32_bringup.c
@@ -0,0 +1,156 @@
+/****************************************************************************
+ * boards/arm/stm32u0/nucleo-u083rc/src/stm32_bringup.c
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <nuttx/debug.h>
+
+#include <sys/types.h>
+
+#ifdef CONFIG_INPUT_BUTTONS
+#  include <nuttx/input/buttons.h>
+#endif
+
+#ifdef CONFIG_USERLED
+#  include <nuttx/leds/userled.h>
+#endif
+
+#ifdef CONFIG_STM32_IWDG
+#  include <stm32_wdg.h>
+#endif
+
+#ifdef CONFIG_TIMER
+#  include <stm32_tim.h>
+#endif
+
+#ifdef CONFIG_SENSORS_QENCODER
+#  include "board_qencoder.h"
+#endif
+
+#ifdef CONFIG_PWM
+#  include "board_pwm.h"
+#endif
+
+#include <arch/board/board.h>
+
+#include "nucleo-u083rc.h"
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: stm32_bringup
+ *
+ * Description:
+ *   Perform architecture-specific initialization
+ *
+ *   CONFIG_BOARD_LATE_INITIALIZE=y :
+ *     Called from board_late_initialize().
+ *
+ ****************************************************************************/
+
+int stm32_bringup(void)
+{
+  int ret;
+
+#ifdef CONFIG_STM32_IWDG
+  /* Initialize the watchdog timer */
+
+  stm32_iwdginitialize("/dev/watchdog0", STM32_LSI_FREQUENCY);
+#endif
+
+#if defined(CONFIG_TIMER) && defined(CONFIG_STM32_TIM6)
+  /* Initialize and register the timer driver - TIM6 */
+
+  ret = stm32_timer_initialize("/dev/timer0", 6);
+  if (ret < 0)
+    {
+      syslog(LOG_ERR, "ERROR: stm32_timer_initialize failed: %d\n", ret);
+    }
+#endif
+
+#if !defined(CONFIG_ARCH_LEDS) && defined(CONFIG_USERLED_LOWER)
+  /* Register the LED driver */
+
+  ret = userled_lower_initialize(LED_DRIVER_PATH);
+  if (ret < 0)
+    {
+      syslog(LOG_ERR, "ERROR: userled_lower_initialize() failed: %d\n", ret);
+      return ret;
+    }
+#endif
+
+#ifdef CONFIG_INPUT_BUTTONS
+  /* Register the BUTTON driver */
+
+  ret = btn_lower_initialize("/dev/buttons");
+  if (ret < 0)
+    {
+      syslog(LOG_ERR, "ERROR: btn_lower_initialize() failed: %d\n", ret);
+    }
+#endif
+
+#ifdef CONFIG_ADC
+  /* Initialize ADC and register the ADC driver. */
+
+  ret = stm32_adc_setup();
+  if (ret < 0)
+    {
+      syslog(LOG_ERR, "ERROR: stm32_adc_setup failed: %d\n", ret);
+    }
+#endif
+
+#ifdef CONFIG_PWM
+  /* Initialize PWM and register the PWM device. */
+
+  ret = stm32_pwm_setup();
+  if (ret < 0)
+    {
+      syslog(LOG_ERR, "ERROR: stm32_pwm_setup failed: %d\n", ret);
+    }
+#endif
+
+#ifdef CONFIG_SENSORS_QENCODER
+  /* Initialize and register the qencoder driver - TIM3 */
+
+  ret = board_qencoder_initialize(0, 3);
+  if (ret != OK)
+    {
+      syslog(LOG_ERR,
+             "ERROR: Failed to register the qencoder: %d\n",
+             ret);
+      return ret;
+    }
+#endif
+
+  UNUSED(ret);
+  return OK;
+}
diff --git a/boards/arm/stm32u0/nucleo-u083rc/src/stm32_buttons.c 
b/boards/arm/stm32u0/nucleo-u083rc/src/stm32_buttons.c
new file mode 100644
index 00000000000..4a61b2da2c2
--- /dev/null
+++ b/boards/arm/stm32u0/nucleo-u083rc/src/stm32_buttons.c
@@ -0,0 +1,117 @@
+/****************************************************************************
+ * boards/arm/stm32u0/nucleo-u083rc/src/stm32_buttons.c
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <errno.h>
+
+#include <nuttx/arch.h>
+#include <nuttx/board.h>
+#include <arch/board/board.h>
+
+#include "stm32_gpio.h"
+#include "nucleo-u083rc.h"
+
+#ifdef CONFIG_ARCH_BUTTONS
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: board_button_initialize
+ *
+ * Description:
+ *   board_button_initialize() must be called to initialize button resources.
+ *   After that, board_buttons() may be called to collect the current state
+ *   of all buttons or board_button_irq() may be called to register button
+ *   interrupt handlers.
+ *
+ ****************************************************************************/
+
+uint32_t board_button_initialize(void)
+{
+  /* Configure the single button as an input.  NOTE that EXTI interrupts are
+   * also configured for the pin.
+   */
+
+  stm32_configgpio(GPIO_BTN_USER);
+  return NUM_BUTTONS;
+}
+
+/****************************************************************************
+ * Name: board_buttons
+ ****************************************************************************/
+
+uint32_t board_buttons(void)
+{
+  /* Check that state of each USER button. A LOW value means that the key is
+   * pressed.
+   */
+
+  bool released = stm32_gpioread(GPIO_BTN_USER);
+  return !released;
+}
+
+/****************************************************************************
+ * Button support.
+ *
+ * Description:
+ *   board_button_initialize() must be called to initialize button resources.
+ *   After that, board_buttons() may be called to collect the current state
+ *   of all buttons or board_button_irq() may be called to register button
+ *   interrupt handlers.
+ *
+ *   After board_button_initialize() has been called, board_buttons() may be
+ *   called to collect the state of all buttons.  board_buttons() returns an
+ *   32-bit bit set with each bit associated with a button.  See the
+ *   BUTTON_*_BIT definitions in board.h for the meaning of each bit.
+ *
+ *   board_button_irq() may be called to register an interrupt handler that
+ *   will be called when a button is depressed or released. The ID value is a
+ *   button enumeration value that uniquely identifies a button resource. See
+ *   the BUTTON_* definitions in board.h for the meaning of enumeration
+ *   value.
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_ARCH_IRQBUTTONS
+int board_button_irq(int id, xcpt_t irqhandler, void *arg)
+{
+  int ret = -EINVAL;
+
+  if (id == BUTTON_USER)
+    {
+      ret = stm32_gpiosetevent(GPIO_BTN_USER, true, true, true,
+                               irqhandler, arg);
+    }
+
+  return ret;
+}
+#endif
+#endif /* CONFIG_ARCH_BUTTONS */
diff --git a/boards/arm/stm32u0/nucleo-u083rc/src/stm32_userleds.c 
b/boards/arm/stm32u0/nucleo-u083rc/src/stm32_userleds.c
new file mode 100644
index 00000000000..d5c63599612
--- /dev/null
+++ b/boards/arm/stm32u0/nucleo-u083rc/src/stm32_userleds.c
@@ -0,0 +1,165 @@
+/****************************************************************************
+ * boards/arm/stm32u0/nucleo-u083rc/src/stm32_userleds.c
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <assert.h>
+#include <nuttx/debug.h>
+
+#include <arch/board/board.h>
+#include <nuttx/power/pm.h>
+
+#include "chip.h"
+#include "arm_internal.h"
+#include "stm32_gpio.h"
+#include "nucleo-u083rc.h"
+
+#ifndef CONFIG_ARCH_LEDS
+
+/****************************************************************************
+ * Private Function Prototypes
+ ****************************************************************************/
+
+/* LED Power Management */
+
+#ifdef CONFIG_PM
+static void led_pm_notify(struct pm_callback_s *cb, int domain,
+                          enum pm_state_e pmstate);
+static int led_pm_prepare(struct pm_callback_s *cb, int domain,
+                          enum pm_state_e pmstate);
+#endif
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+#ifdef CONFIG_PM
+static struct pm_callback_s g_ledscb =
+{
+  .notify  = led_pm_notify,
+  .prepare = led_pm_prepare,
+};
+#endif
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: led_pm_notify
+ *
+ * Description:
+ *   Notify the driver of new power state. This callback is called after
+ *   all drivers have had the opportunity to prepare for the new power state.
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_PM
+static void led_pm_notify(struct pm_callback_s *cb, int domain,
+                          enum pm_state_e pmstate)
+{
+}
+#endif
+
+/****************************************************************************
+ * Name: led_pm_prepare
+ *
+ * Description:
+ *   Request the driver to prepare for a new power state. This is a warning
+ *   that the system is about to enter into a new power state. The driver
+ *   should begin whatever operations that may be required to enter power
+ *   state. The driver may abort the state change mode by returning a
+ *   non-zero value from the callback function.
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_PM
+static int led_pm_prepare(struct pm_callback_s *cb, int domain,
+                          enum pm_state_e pmstate)
+{
+  /* No preparation to change power modes is required by the LEDs driver.
+   * We always accept the state change by returning OK.
+   */
+
+  return OK;
+}
+#endif
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: board_userled_initialize
+ ****************************************************************************/
+
+uint32_t board_userled_initialize(void)
+{
+  /* Configure LD4 GPIO for output */
+
+  stm32_configgpio(GPIO_LD4);
+  return BOARD_NLEDS;
+}
+
+/****************************************************************************
+ * Name: board_userled
+ ****************************************************************************/
+
+void board_userled(int led, bool ledon)
+{
+  if (led == BOARD_LED1)
+    {
+      stm32_gpiowrite(GPIO_LD4, ledon);
+    }
+}
+
+/****************************************************************************
+ * Name: board_userled_all
+ ****************************************************************************/
+
+void board_userled_all(uint32_t ledset)
+{
+  stm32_gpiowrite(GPIO_LD4, (ledset & BOARD_LED1_BIT) != 0);
+}
+
+/****************************************************************************
+ * Name: stm32_led_pminitialize
+ ****************************************************************************/
+
+#ifdef CONFIG_PM
+void stm32_led_pminitialize(void)
+{
+  /* Register to receive power management callbacks */
+
+  int ret = pm_register(&g_ledscb);
+  DEBUGASSERT(ret == OK);
+  UNUSED(ret);
+}
+#endif /* CONFIG_PM */
+
+#endif /* !CONFIG_ARCH_LEDS */

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