1.. zephyr:board:: nucleo_f042k6
2
3Overview
4********
5The STM32 Nucleo-32 development board with STM32F042K6 MCU, supports Arduino nano connectivity.
6
7The STM32 Nucleo board provides an affordable, and flexible way for users to try out new concepts,
8and build prototypes with the STM32 microcontroller, choosing from the various
9combinations of performance, power consumption and features.
10
11The STM32 Nucleo board integrates the ST-LINK/V2-1 debugger and programmer.
12
13The STM32 Nucleo board comes with the STM32 comprehensive software HAL library together
14with various packaged software examples.
15
16More information about the board can be found at the `Nucleo F042K6 website`_.
17
18Hardware
19********
20Nucleo F042K6 provides the following hardware components:
21
22- STM32 microcontroller in LQFP32 package
23
24- On-board ST-LINK/V2-1 debugger/programmer with SWD connector:
25
26- Flexible board power supply:
27
28  - USB VBUS or external source (3.3V, 5V, 7 - 12V)
29
30- Three LEDs:
31
32  - USB communication (LD1), user LED (LD2), power LED (LD3)
33
34- reset push button
35
36More information about STM32F042K6 can be found here:
37
38- `STM32F042 reference manual`_
39- `STM32F042 data sheet`_
40
41Supported Features
42==================
43
44The Zephyr nucleo_f042k6 board configuration supports the following hardware features:
45
46+-----------+------------+-------------------------------------+
47| Interface | Controller | Driver/Component                    |
48+===========+============+=====================================+
49| NVIC      | on-chip    | nested vector interrupt controller  |
50+-----------+------------+-------------------------------------+
51| UART      | on-chip    | serial port-polling;                |
52|           |            | serial port-interrupt               |
53+-----------+------------+-------------------------------------+
54| PINMUX    | on-chip    | pinmux                              |
55+-----------+------------+-------------------------------------+
56| GPIO      | on-chip    | gpio                                |
57+-----------+------------+-------------------------------------+
58| CLOCK     | on-chip    | reset and clock control             |
59+-----------+------------+-------------------------------------+
60| FLASH     | on-chip    | flash memory                        |
61+-----------+------------+-------------------------------------+
62| I2C       | on-chip    | i2c controller                      |
63+-----------+------------+-------------------------------------+
64| SPI       | on-chip    | spi controller                      |
65+-----------+------------+-------------------------------------+
66
67Other hardware features are not yet supported in this Zephyr port.
68
69The default configuration can be found in
70:zephyr_file:`boards/st/nucleo_f042k6/nucleo_f042k6_defconfig`
71
72Connections and IOs
73===================
74
75Each of the GPIO pins can be configured by software as output (push-pull or open-drain), as
76input (with or without pull-up or pull-down), or as peripheral alternate function. Most of the
77GPIO pins are shared with digital or analog alternate functions.
78
79Board connectors:
80-----------------
81.. image:: img/nucleo_f042k6_connectors.jpg
82   :align: center
83   :alt: Nucleo F042K6 connectors
84
85Default Zephyr Peripheral Mapping:
86----------------------------------
87
88- UART_1 TX/RX : PA2/PA15 (ST-Link Virtual COM Port)
89- I2C1 SCL/SDA : PB6/PB7 (Arduino I2C)
90- SPI1 NSS/SCK/MISO/MOSI : PA4/PA5/PA6/PA7 (Arduino SPI)
91- LD2 : PB3
92
93
94For more details please refer to `STM32 Nucleo-32 board User Manual`_.
95
96Programming and Debugging
97*************************
98
99Nucleo F042K6 board includes an ST-LINK/V2-1 embedded debug tool interface.
100
101Applications for the ``nucleo_f042k6`` board configuration can be built and
102flashed in the usual way (see :ref:`build_an_application` and
103:ref:`application_run` for more details).
104
105Flashing
106========
107
108The board is configured to be flashed using west `STM32CubeProgrammer`_ runner,
109so its :ref:`installation <stm32cubeprog-flash-host-tools>` is required.
110
111Alternatively, OpenOCD or JLink can also be used to flash the board using
112the ``--runner`` (or ``-r``) option:
113
114.. code-block:: console
115
116   $ west flash --runner openocd
117   $ west flash --runner jlink
118
119Flashing an application to Nucleo F042K6
120----------------------------------------
121
122Here is an example for the :zephyr:code-sample:`blinky` application.
123
124.. zephyr-app-commands::
125   :zephyr-app: samples/basic/blinky
126   :board: nucleo_f042k6
127   :goals: build flash
128
129You will see the LED blinking every second.
130
131Debugging
132=========
133
134You can debug an application in the usual way.  Here is an example for the
135:zephyr:code-sample:`blinky` application.
136
137.. zephyr-app-commands::
138   :zephyr-app: samples/basic/blinky
139   :board: nucleo_f042k6
140   :maybe-skip-config:
141   :goals: debug
142
143References
144**********
145
146.. target-notes::
147
148.. _Nucleo F042K6 website:
149   https://www.st.com/en/evaluation-tools/nucleo-f042k6.html
150
151.. _STM32F042 reference manual:
152   https://www.st.com/resource/en/reference_manual/dm00031936-stm32f0x1stm32f0x2stm32f0x8-advanced-armbased-32bit-mcus-stmicroelectronics.pdf
153
154.. _STM32F042 data sheet:
155   https://www.st.com/resource/en/datasheet/stm32f042k6.pdf
156
157.. _STM32 Nucleo-32 board User Manual:
158   https://www.st.com/resource/en/user_manual/dm00231744-stm32-nucleo32-boards-mb1180-stmicroelectronics.pdf
159
160.. _STM32CubeProgrammer:
161   https://www.st.com/en/development-tools/stm32cubeprog.html
162