.. zephyr:board:: mimxrt1020_evk

Overview
********

The i.MX RT1020 expands the i.MX RT crossover processor families by providing
high-performance feature set in low-cost LQFP packages, further simplifying
board design and layout for customers. The i.MX RT1020 runs on the Arm®
Cortex®-M7 core at 500 MHz.

Hardware
********

- MIMXRT1021DAG5A MCU

- Memory

  - 256 Mbit SDRAM
  - 64 Mbit QSPI Flash
  - TF socket for SD card

- Connectivity

  - 10/100 Mbit/s Ethernet PHY
  - Micro USB host and OTG connectors
  - CAN transceivers
  - Arduino interface

- Audio

  - Audio Codec
  - 4-pole audio headphone jack
  - Microphone
  - External speaker connection

- Power

  - 5 V DC jack

- Debug

  - JTAG 20-pin connector
  - OpenSDA with DAPLink

For more information about the MIMXRT1020 SoC and MIMXRT1020-EVK board, see
these references:

- `i.MX RT1020 Website`_
- `i.MX RT1020 Datasheet`_
- `i.MX RT1020 Reference Manual`_
- `MIMXRT1020-EVK Website`_
- `MIMXRT1020-EVK User Guide`_
- `MIMXRT1020-EVK Design Files`_

External Memory
===============

This platform has the following external memories:

+----------------+------------+-------------------------------------+
| Device         | Controller | Status                              |
+================+============+=====================================+
| MT48LC16M16A2P | SEMC       | Enabled via device configuration    |
|                |            | data block, which sets up SEMC at   |
|                |            | boot time                           |
+----------------+------------+-------------------------------------+
| IS25LP064A     | FLEXSPI    | Enabled via flash configuration     |
|                |            | block, which sets up FLEXSPI at     |
|                |            | boot time                           |
+----------------+------------+-------------------------------------+

Supported Features
==================

.. zephyr:board-supported-hw::

.. note::

   For additional features not yet supported, please also refer to the
   :zephyr:board:`mimxrt1064_evk` , which is the superset board in NXP's i.MX RT10xx family.
   NXP prioritizes enabling the superset board with NXP's Full Platform Support for
   Zephyr.  Therefore, the mimxrt1064_evk board may have additional features
   already supported, which can also be re-used on this mimxrt1020_evk board.

Connections and I/Os
====================

The MIMXRT1020 SoC has five pairs of pinmux/gpio controllers.

+---------------+-----------------+---------------------------+
| Name          | Function        | Usage                     |
+===============+=================+===========================+
| GPIO_AD_B0_05 | GPIO            | LED                       |
+---------------+-----------------+---------------------------+
| GPIO_AD_B0_06 | LPUART1_TX      | UART Console              |
+---------------+-----------------+---------------------------+
| GPIO_AD_B0_07 | LPUART1_RX      | UART Console              |
+---------------+-----------------+---------------------------+
| GPIO_AD_B1_08 | LPUART2_TX      | UART BT HCI               |
+---------------+-----------------+---------------------------+
| GPIO_AD_B1_09 | LPUART2_RX      | UART BT HCI               |
+---------------+-----------------+---------------------------+
| GPIO_AD_B1_14 | LPI2C1_SCL      | I2C                       |
+---------------+-----------------+---------------------------+
| GPIO_AD_B1_15 | LPI2C1_SDA      | I2C                       |
+---------------+-----------------+---------------------------+
| GPIO_SD_B1_02 | LPI2C4_SCL      | I2C                       |
+---------------+-----------------+---------------------------+
| GPIO_SD_B1_03 | LPI2C4_SDA      | I2C                       |
+---------------+-----------------+---------------------------+
| WAKEUP        | GPIO            | SW0                       |
+---------------+-----------------+---------------------------+
| GPIO_AD_B0_04 | ENET_RST        | Ethernet                  |
+---------------+-----------------+---------------------------+
| GPIO_AD_B0_08 | ENET_REF_CLK    | Ethernet                  |
+---------------+-----------------+---------------------------+
| GPIO_AD_B0_09 | ENET_RX_DATA01  | Ethernet                  |
+---------------+-----------------+---------------------------+
| GPIO_AD_B0_10 | ENET_RX_DATA00/LPSPI1_SCK | Ethernet/SPI    |
+---------------+-----------------+---------------------------+
| GPIO_AD_B0_11 | ENET_RX_EN/LPSPI1_PCS0 | Ethernet/SPI       |
+---------------+-----------------+---------------------------+
| GPIO_AD_B0_12 | ENET_RX_ER/LPSPI1_SDO | Ethernet/SPI        |
+---------------+-----------------+---------------------------+
| GPIO_AD_B0_13 | ENET_TX_EN/LPSPI1_SDI | Ethernet/SPI        |
+---------------+-----------------+---------------------------+
| GPIO_AD_B0_14 | ENET_TX_DATA00  | Ethernet                  |
+---------------+-----------------+---------------------------+
| GPIO_AD_B0_15 | ENET_TX_DATA01  | Ethernet                  |
+---------------+-----------------+---------------------------+
| GPIO_AD_B1_06 | ENET_INT        | Ethernet                  |
+---------------+-----------------+---------------------------+
| GPIO_EMC_41   | ENET_MDC        | Ethernet                  |
+---------------+-----------------+---------------------------+
| GPIO_EMC_40   | ENET_MDIO       | Ethernet                  |
+---------------+-----------------+---------------------------+
| GPIO_AD_B1_07 | USDHC1_VSELECT  | SD Card                   |
+---------------+-----------------+---------------------------+
| GPIO_SD_B0_02 | USDHC1_CMD      | SD Card                   |
+---------------+-----------------+---------------------------+
| GPIO_SD_B0_03 | USDHC1_CLK      | SD Card                   |
+---------------+-----------------+---------------------------+
| GPIO_SD_B0_04 | USDHC1_DATA0    | SD Card                   |
+---------------+-----------------+---------------------------+
| GPIO_SD_B0_05 | USDHC1_DATA1    | SD Card                   |
+---------------+-----------------+---------------------------+
| GPIO_SD_B0_00 | USDHC1_DATA2    | SD Card                   |
+---------------+-----------------+---------------------------+
| GPIO_SD_B0_01 | USDHC1_DATA3    | SD Card                   |
+---------------+-----------------+---------------------------+
| GPIO_SD_B0_06 | USDHC1_CD_B     | SD Card                   |
+---------------+-----------------+---------------------------+
| GPIO_AD_B1_10 | ADC             | ADC1 Channel 10           |
+---------------+-----------------+---------------------------+
| GPIO_AD_B1_11 | ADC             | ADC1 Channel 11           |
+---------------+-----------------+---------------------------+

System Clock
============

The MIMXRT1020 SoC is configured to use SysTick as the system clock source,
running at 500MHz.

When power management is enabled, the 32 KHz low frequency
oscillator on the board will be used as a source for the GPT timer to
generate a system clock. This clock enables lower power states, at the
cost of reduced resolution


Serial Port
===========

The MIMXRT1020 SoC has eight UARTs. ``LPUART1`` is configured for the console,
``LPUART2`` for the Bluetooth Host Controller Interface (BT HCI), and the
remaining are not used.

Programming and Debugging
*************************

.. zephyr:board-supported-runners::

This board supports 3 debug host tools. Please install your preferred host
tool, then follow the instructions in `Configuring a Debug Probe`_ to
configure the board appropriately.

* :ref:`linkserver-debug-host-tools` (Default, Supported by NXP)
* :ref:`jlink-debug-host-tools` (Supported by NXP)
* :ref:`pyocd-debug-host-tools` (Not supported by NXP)

Once the host tool and board are configured, build and flash applications
as usual (see :ref:`build_an_application` and :ref:`application_run` for more
details).

Configuring a Debug Probe
=========================

For the RT1020, J47/J48 are the SWD isolation jumpers, J42 is the DFU
mode jumper, and J16 is the 20 pin JTAG/SWD header.

.. include:: ../../common/rt1xxx-lpclink2-debug.rst.inc

Configuring a Console
=====================

Regardless of your choice in debug probe, we will use the OpenSDA
microcontroller as a usb-to-serial adapter for the serial console. Check that
jumpers J25 and J26 are **on** (they are on by default when boards ship from
the factory) to connect UART signals to the OpenSDA microcontroller.

Connect a USB cable from your PC to J23.

Use the following settings with your serial terminal of choice (minicom, putty,
etc.):

- Speed: 115200
- Data: 8 bits
- Parity: None
- Stop bits: 1

Flashing
========

Here is an example for the :zephyr:code-sample:`hello_world` application.

.. zephyr-app-commands::
   :zephyr-app: samples/hello_world
   :board: mimxrt1020_evk
   :goals: flash

Open a serial terminal, reset the board (press the SW5 button), and you should
see the following message in the terminal:

.. code-block:: console

   ***** Booting Zephyr OS v1.14.0-rc1 *****
   Hello World! mimxrt1020_evk

Debugging
=========

Here is an example for the :zephyr:code-sample:`hello_world` application.

.. zephyr-app-commands::
   :zephyr-app: samples/hello_world
   :board: mimxrt1020_evk
   :goals: debug

Open a serial terminal, step through the application in your debugger, and you
should see the following message in the terminal:

.. code-block:: console

   ***** Booting Zephyr OS v1.14.0-rc1 *****
   Hello World! mimxrt1020_evk

.. include:: ../../common/board-footer.rst.inc

.. _MIMXRT1020-EVK Website:
   https://www.nxp.com/support/developer-resources/run-time-software/i.mx-developer-resources/i.mx-rt1020-evaluation-kit:MIMXRT1020-EVK

.. _MIMXRT1020-EVK User Guide:
   https://www.nxp.com/webapp/Download?colCode=MIMXRT1020EVKHUG

.. _MIMXRT1020-EVK Design Files:
   https://www.nxp.com/webapp/Download?colCode=MIMXRT1020-EVK-Design-Files

.. _i.MX RT1020 Website:
   https://www.nxp.com/products/processors-and-microcontrollers/arm-based-processors-and-mcus/i.mx-applications-processors/i.mx-rt-series/i.mx-rt1020-crossover-processor-with-arm-cortex-m7-core:i.MX-RT1020

.. _i.MX RT1020 Datasheet:
   https://www.nxp.com/docs/en/data-sheet/IMXRT1020CEC.pdf

.. _i.MX RT1020 Reference Manual:
   https://www.nxp.com/webapp/Download?colCode=IMXRT1020RM

.. _OpenSDA J-Link MIMXRT1020-EVK Firmware:
   https://www.segger.com/downloads/jlink/OpenSDA_MIMXRT1020-EVK
