Nuttx Guide

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Мови (Ukrainian)

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i.MX RT1050 EVK ​

i.MX RT1050 EVK is an evaluation kit by NXP company. This kit uses the i.MX RT1050 crossover MCU with ARM Cortex M7 core.

Features ​

Processor

:   -   MIMXRT1052DVL6A processor

Memory

:   -   256 Mb SDRAM memory
    -   512 Mb Hyper Flash
    -   Footprint for QSPI Flash
    -   TF socket for SD card

Display and Audio

:   -   Parallel LCD connector
    -   Camera connector
    -   Audio CODEC
    -   4-pole audio headphone jack
    -   External speaker connection
    -   Microphone
    -   SPDIF connector

Connectivity

:   -   Micro USB host and OTG connectors
    -   Ethernet (10/100T) connector
    -   CAN transceivers
    -   Arduino® interface

Serial Console ​

Virtual console port provided by OpenSDA:

UART1_TXD GPIO_AD_B0_12 LPUART1_TX UART1_RXD GPIO_AD_B0_13 LPUART1_RX

Arduino RS-232 Shield:

J22 D0 UART_RX GPIO_AD_B1_07 LPUART3_RX J22 D1 UART_TX GPIO_AD_B1_06 LPUART3_TX

LEDs and buttons ​

LEDs ​

There are four LED status indicators located on the EVK Board. The functions of these LEDs include:

Pin Description

D3 Power Supply D15 Reset LED D16 OpenSDA D18 User LED

Only a single LED, D18, is under software control. It connects to GPIO_AD_B0_09 which is shared with JTAG_TDI and ENET_RST

This LED is not used by the board port unless CONFIG_ARCH_LEDS is defined. In that case, the usage by the board port is defined in include/board.h and src/imxrt_autoleds.c. The LED is used to encode OS-related events as follows:

SYMBOL Meaning LED

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 N/C LED_SIGNAL In a signal handler N/C LED_ASSERTION An assertion failed N/C LED_PANIC The system has crashed FLASH

Thus if the LED is statically on, NuttX has successfully booted and is, apparently, running normally. If the LED is flashing at approximately 2Hz, then a fatal error has been detected and the system has halted.

Buttons ​

There are four user interface switches on the MIMXRT1050 EVK Board:

  • SW1: Power Switch (slide switch)
  • SW2: ON/OFF Button
  • SW3: Reset button
  • SW8: User button

Only the user button is available to the software. It is sensed on the WAKEUP pin which will be pulled low when the button is pressed.

Configurations ​

knsh ​

This is identical to the nsh configuration below except that NuttX is built as a protected mode, monolithic module and the user applications are built separately. For further information about compiling and running this configuration please refer to imxrt1064-evk documentation.

netnsh ​

This configuration is similar to the nsh configuration except that is has networking enabled, both IPv4 and IPv6. This NSH configuration is focused on network-related testing.

nsh ​

Configures the NuttShell (nsh) located at examples/nsh. This NSH configuration is focused on low level, command-line driver testing. Built-in applications are supported, but none are enabled. This configuration does not support a network.