NXP 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:

Supported Features¶

The mimxrt1020_evk board configuration supports the following hardware features:

Interface	Controller	Driver/Component
NVIC	on-chip	nested vector interrupt controller
SYSTICK	on-chip	systick
GPIO	on-chip	gpio
I2C	on-chip	i2c
SDHC	on-chip	disk access
UART	on-chip	serial port-polling; serial port-interrupt
ENET	on-chip	ethernet
USB	on-chip	USB device

The default configuration can be found in the defconfig file: boards/arm/mimxrt1020_evk/mimxrt1020_evk_defconfig

Other hardware features are not currently supported by the port.

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	Ethernet
GPIO_AD_B0_11	ENET_RX_EN	Ethernet
GPIO_AD_B0_12	ENET_RX_ER	Ethernet
GPIO_AD_B0_13	ENET_TX_EN	Ethernet
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

System Clock¶

The MIMXRT1020 SoC is configured to use the 24 MHz external oscillator on the board with the on-chip PLL to generate a 500 MHz core clock.

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¶

Build and flash applications as usual (see Building an Application and Run an Application 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 OpenSDA DAPLink Onboard Debug Probe, however the pyOCD Debug Host Tools do not yet support programming the external flashes on this board so you must reconfigure the board for one of the following debug probes instead.

Option 1: OpenSDA J-Link Onboard Debug Probe (Recommended)¶

Install the J-Link Debug Host Tools and make sure they are in your search path.

Follow the instructions in OpenSDA J-Link Onboard Debug Probe to program the OpenSDA J-Link MIMXRT1020-EVK Firmware. Check that jumpers J27 and J28 are on (they are on by default when boards ship from the factory) to ensure SWD signals are connected to the OpenSDA microcontroller.

Option 2: J-Link External Debug Probe ¶

Install the J-Link Debug Host Tools and make sure they are in your search path.

Attach a J-Link 20-pin connector to J16. Check that jumpers J27 and J28 are off (they are on by default when boards ship from the factory) to ensure SWD signals are disconnected from the OpenSDA microcontroller.

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 Hello World application.

# From the root of the zephyr repository
west build -b mimxrt1020_evk samples/hello_world
west flash

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

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

Debugging¶