| .. _mimxrt685_evk: |
| |
| NXP MIMXRT685-EVK |
| ################## |
| |
| Overview |
| ******** |
| |
| The i.MX RT600 is a crossover MCU family optimized for 32-bit immersive audio |
| playback and voice user interface applications combining a high-performance |
| Cadence Tensilica HiFi 4 audio DSP core with a next-generation Cortex-M33 |
| core. The i.MX RT600 family of crossover MCUs is designed to unlock the |
| potential of voice-assisted end nodes with a secure, power-optimized embedded |
| processor. |
| |
| The i.MX RT600 family provides up to 4.5MB of on-chip SRAM and several |
| high-bandwidth interfaces to access off-chip flash, including an Octal/Quad SPI |
| interface with an on-the-fly decryption engine. |
| |
| .. image:: ./mimxrt685_evk.jpg |
| :width: 720px |
| :align: center |
| :alt: MIMXRT685-EVK |
| |
| Hardware |
| ******** |
| |
| - MIMXRT685SFVKB Cortex-M33 (300 MHz, 128 KB TCM) core processor with Cadence Xtensa HiFi4 DSP |
| - Onboard, high-speed USB, Link2 debug probe with CMSIS-DAP protocol (supporting Cortex M33 debug only) |
| - High speed USB port with micro A/B connector for the host or device functionality |
| - UART, I2C and SPI port bridging from i.MX RT685 target to USB via the on-board debug probe |
| - 512 MB Macronix Octal SPI Flash operating at 1.8 V |
| - 4.5 MB Apmemory PSRAM |
| - Full size SD card slot (SDIO) |
| - NXP PCA9420UK PMIC |
| - User LEDs |
| - Reset and User buttons |
| - Arduino and PMod/Host expansion connectors |
| - NXP FXOS8700CQ accelerometer |
| - Stereo audio codec with line in/out and electret microphone |
| - Stereo NXP TFA9894 digital amplifiers, with option for external +5V power for higher performance speakers |
| - Support for up to eight off-board digital microphones via 12-pin header |
| - Two on-board DMICS |
| |
| For more information about the MIMXRT685 SoC and MIMXRT685-EVK board, see |
| these references: |
| |
| - `i.MX RT685 Website`_ |
| - `i.MX RT685 Datasheet`_ |
| - `i.MX RT685 Reference Manual`_ |
| - `MIMXRT685-EVK Website`_ |
| - `MIMXRT685-EVK User Guide`_ |
| - `MIMXRT685-EVK Schematics`_ |
| |
| Supported Features |
| ================== |
| |
| The mimxrt685_evk board configuration supports the following hardware |
| features: |
| |
| +-----------+------------+-------------------------------------+ |
| | Interface | Controller | Driver/Component | |
| +===========+============+=====================================+ |
| | NVIC | on-chip | nested vector interrupt controller | |
| +-----------+------------+-------------------------------------+ |
| | SYSTICK | on-chip | systick | |
| +-----------+------------+-------------------------------------+ |
| | OS_TIMER | on-chip | os timer | |
| +-----------+------------+-------------------------------------+ |
| | IOCON | on-chip | pinmux | |
| +-----------+------------+-------------------------------------+ |
| | GPIO | on-chip | gpio | |
| +-----------+------------+-------------------------------------+ |
| | FLASH | on-chip | OctalSPI Flash | |
| +-----------+------------+-------------------------------------+ |
| | USART | on-chip | serial port-polling | |
| +-----------+------------+-------------------------------------+ |
| | I2C | on-chip | i2c | |
| +-----------+------------+-------------------------------------+ |
| | SPI | on-chip | spi | |
| +-----------+------------+-------------------------------------+ |
| | I2S | on-chip | i2s | |
| +-----------+------------+-------------------------------------+ |
| | CLOCK | on-chip | clock_control | |
| +-----------+------------+-------------------------------------+ |
| | HWINFO | on-chip | Unique device serial number | |
| +-----------+------------+-------------------------------------+ |
| | RTC | on-chip | counter | |
| +-----------+------------+-------------------------------------+ |
| | PWM | on-chip | pwm | |
| +-----------+------------+-------------------------------------+ |
| | WDT | on-chip | watchdog | |
| +-----------+------------+-------------------------------------+ |
| | SDHC | on-chip | disk access | |
| +-----------+------------+-------------------------------------+ |
| | USB | on-chip | USB device | |
| +-----------+------------+-------------------------------------+ |
| | ADC | on-chip | adc | |
| +-----------+------------+-------------------------------------+ |
| | CTIMER | on-chip | counter | |
| +-----------+------------+-------------------------------------+ |
| |
| The default configuration can be found in the defconfig file: |
| |
| ``boards/arm/mimxrt685_evk/mimxrt685_evk_cm33_defconfig`` |
| |
| Other hardware features are not currently supported by the port. |
| |
| Connections and IOs |
| =================== |
| |
| The MIMXRT685 SoC has IOCON registers, which can be used to configure the |
| functionality of a pin. |
| |
| +---------+-----------------+----------------------------+ |
| | Name | Function | Usage | |
| +=========+=================+============================+ |
| | PIO0_2 | USART | USART RX | |
| +---------+-----------------+----------------------------+ |
| | PIO0_1 | USART | USART TX | |
| +---------+-----------------+----------------------------+ |
| | PIO0_14 | GPIO | GREEN LED | |
| +---------+-----------------+----------------------------+ |
| | PIO1_1 | GPIO | SW0 | |
| +---------+-----------------+----------------------------+ |
| | PIO0_17 | I2C | I2C SDA | |
| +---------+-----------------+----------------------------+ |
| | PIO0_18 | I2C | I2C SCL | |
| +---------+-----------------+----------------------------+ |
| | PIO1_5 | GPIO | FXOS8700 TRIGGER | |
| +---------+-----------------+----------------------------+ |
| | PIO1_5 | SPI | SPI MOSI | |
| +---------+-----------------+----------------------------+ |
| | PIO1_4 | SPI | SPI MISO | |
| +---------+-----------------+----------------------------+ |
| | PIO1_3 | SPI | SPI SCK | |
| +---------+-----------------+----------------------------+ |
| | PIO1_6 | SPI | SPI SSEL | |
| +---------+-----------------+----------------------------+ |
| | PIO0_23 | I2S | I2S DATAOUT | |
| +---------+-----------------+----------------------------+ |
| | PIO0_22 | I2S | I2S TX WS | |
| +---------+-----------------+----------------------------+ |
| | PIO0_21 | I2S | I2S TX SCK | |
| +---------+-----------------+----------------------------+ |
| | PIO0_9 | I2S | I2S DATAIN | |
| +---------+-----------------+----------------------------+ |
| | PIO0_29 | USART | USART TX | |
| +---------+-----------------+----------------------------+ |
| | PIO0_30 | USART | USART RX | |
| +---------+-----------------+----------------------------+ |
| | PIO1_11 | FLEXSPI0B_DATA0 | OctalSPI Flash | |
| +---------+-----------------+----------------------------+ |
| | PIO1_12 | FLEXSPI0B_DATA1 | OctalSPI Flash | |
| +---------+-----------------+----------------------------+ |
| | PIO1_13 | FLEXSPI0B_DATA2 | OctalSPI Flash | |
| +---------+-----------------+----------------------------+ |
| | PIO1_14 | FLEXSPI0B_DATA3 | OctalSPI Flash | |
| +---------+-----------------+----------------------------+ |
| | PIO1_29 | FLEXSPI0B_SCLK | OctalSPI Flash | |
| +---------+-----------------+----------------------------+ |
| | PIO2_12 | PIO2_12 | OctalSPI Flash | |
| +---------+-----------------+----------------------------+ |
| | PIO2_17 | FLEXSPI0B_DATA4 | OctalSPI Flash | |
| +---------+-----------------+----------------------------+ |
| | PIO2_18 | FLEXSPI0B_DATA5 | OctalSPI Flash | |
| +---------+-----------------+----------------------------+ |
| | PIO2_19 | FLEXSPI0B_SS0_N | OctalSPI Flash | |
| +---------+-----------------+----------------------------+ |
| | PIO2_22 | FLEXSPI0B_DATA6 | OctalSPI Flash | |
| +---------+-----------------+----------------------------+ |
| | PIO2_23 | FLEXSPI0B_DATA7 | OctalSPI Flash | |
| +---------+-----------------+----------------------------+ |
| | PIO0_27 | SCT0_OUT7 | PWM | |
| +---------+-----------------+----------------------------+ |
| | PIO1_30 | SD0_CLK | SD card | |
| +---------+-----------------+----------------------------+ |
| | PIO1_31 | SD0_CMD | SD card | |
| +---------+-----------------+----------------------------+ |
| | PIO2_0 | SD0_D0 | SD card | |
| +---------+-----------------+----------------------------+ |
| | PIO2_1 | SD0_D1 | SD card | |
| +---------+-----------------+----------------------------+ |
| | PIO2_2 | SD0_D2 | SD card | |
| +---------+-----------------+----------------------------+ |
| | PIO2_3 | SD0_D3 | SD card | |
| +---------+-----------------+----------------------------+ |
| | PIO2_4 | SD0_WR_PRT | SD card | |
| +---------+-----------------+----------------------------+ |
| | PIO2_9 | SD0_CD | SD card | |
| +---------+-----------------+----------------------------+ |
| | PIO2_10 | SD0_RST | SD card | |
| +---------+-----------------+----------------------------+ |
| |
| System Clock |
| ============ |
| |
| The MIMXRT685 EVK is configured to use the OS Event timer |
| as a source for the system clock. |
| |
| Serial Port |
| =========== |
| |
| The MIMXRT685 SoC has 8 FLEXCOMM interfaces for serial communication. One is |
| configured as USART for the console and the remaining are not used. |
| |
| Programming and Debugging |
| ************************* |
| |
| Build and flash applications as usual (see :ref:`build_an_application` and |
| :ref:`application_run` for more details). |
| |
| Configuring a Debug Probe |
| ========================= |
| |
| A debug probe is used for both flashing and debugging the board. This board is |
| configured by default to use the LPC-Link2. |
| |
| .. tabs:: |
| |
| .. group-tab:: LPCLink2 JLink Onboard |
| |
| |
| 1. Install the :ref:`jlink-debug-host-tools` and make sure they are in your search path. |
| 2. To connect the SWD signals to onboard debug circuit, install jumpers JP17, JP18 and JP19, |
| if not already done (these jumpers are installed by default). |
| 3. Follow the instructions in :ref:`lpclink2-jlink-onboard-debug-probe` to program the |
| J-Link firmware. Please make sure you have the latest firmware for this board. |
| |
| .. group-tab:: JLink External |
| |
| |
| 1. Install the :ref:`jlink-debug-host-tools` and make sure they are in your search path. |
| |
| 2. To disconnect the SWD signals from onboard debug circuit, **remove** jumpers J17, J18, |
| and J19 (these are installed by default). |
| |
| 3. Connect the J-Link probe to J2 10-pin header. |
| |
| See :ref:`jlink-external-debug-probe` for more information. |
| |
| Configuring a Console |
| ===================== |
| |
| Connect a USB cable from your PC to J16, and use the serial terminal of your choice |
| (minicom, putty, etc.) with the following settings: |
| |
| - Speed: 115200 |
| - Data: 8 bits |
| - Parity: None |
| - Stop bits: 1 |
| |
| Flashing |
| ======== |
| |
| Here is an example for the :ref:`hello_world` application. This example uses the |
| :ref:`jlink-debug-host-tools` as default. |
| |
| .. zephyr-app-commands:: |
| :zephyr-app: samples/hello_world |
| :board: mimxrt685_evk_cm33 |
| :goals: flash |
| |
| Open a serial terminal, reset the board (press the RESET button), and you should |
| see the following message in the terminal: |
| |
| .. code-block:: console |
| |
| ***** Booting Zephyr OS v1.14.0 ***** |
| Hello World! mimxrt685_evk_cm33 |
| |
| Debugging |
| ========= |
| |
| Here is an example for the :ref:`hello_world` application. This example uses the |
| :ref:`jlink-debug-host-tools` as default. |
| |
| .. zephyr-app-commands:: |
| :zephyr-app: samples/hello_world |
| :board: mimxrt685_evk_cm33 |
| :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 zephyr-v2.3.0 ***** |
| Hello World! mimxrt685_evk_cm33 |
| |
| Troubleshooting |
| =============== |
| |
| If the debug probe fails to connect with the following error, it's possible |
| that the image in flash is interfering and causing this issue. |
| |
| .. code-block:: console |
| |
| Remote debugging using :2331 |
| Remote communication error. Target disconnected.: Connection reset by peer. |
| "monitor" command not supported by this target. |
| "monitor" command not supported by this target. |
| You can't do that when your target is `exec' |
| (gdb) Could not connect to target. |
| Please check power, connection and settings. |
| |
| You can fix it by erasing and reprogramming the flash with the following |
| steps: |
| |
| #. Set the SW5 DIP switches to ON-ON-ON to prevent booting from flash. |
| |
| #. Reset by pressing SW3 |
| |
| #. Run ``west debug`` or ``west flash`` again with a known working Zephyr |
| application (example "Hello World"). |
| |
| #. Set the SW5 DIP switches to ON-OFF-ON to boot from flash. |
| |
| #. Reset by pressing SW3 |
| |
| .. _MIMXRT685-EVK Website: |
| https://www.nxp.com/design/development-boards/i-mx-evaluation-and-development-boards/i-mx-rt600-evaluation-kit:MIMXRT685-EVK |
| |
| .. _MIMXRT685-EVK User Guide: |
| https://www.nxp.com/webapp/Download?colCode=UM11159 |
| |
| .. _MIMXRT685-EVK Schematics: |
| https://www.nxp.com/downloads/en/design-support/RT685-DESIGNFILES.zip |
| |
| .. _i.MX RT685 Website: |
| https://www.nxp.com/products/processors-and-microcontrollers/arm-microcontrollers/i-mx-rt-crossover-mcus/i-mx-rt600-crossover-mcu-with-arm-cortex-m33-and-dsp-cores:i.MX-RT600 |
| |
| .. _i.MX RT685 Datasheet: |
| https://www.nxp.com/docs/en/data-sheet/DS-RT600.pdf |
| |
| .. _i.MX RT685 Reference Manual: |
| https://www.nxp.com/webapp/Download?colCode=UM11147 |
