This demo application connects to Eclipse Paho through MQTT, subscribes to topics and publishes messages.
The following describes the various components and the configuration settings.
Once the application is configured you can:
- Build the application.
- Connect the debugger.
- Run the application and view messages in a debug printf or terminal window.
The real-time operating system Keil RTX5 implements the resource management.
It is configured with the following settings:
- Global Dynamic Memory size: 24000 bytes
- Default Thread Stack size: 3072 bytes
- Event Recorder Configuration
- Global Initialization: 1
- Start Recording: 1
- Global Initialization: 1
Refer to Configure RTX v5 for a detailed description of all configuration options.
This implementation uses an IoT socket layer that connects to a CMSIS-Driver WiFi.
The file socket_startup.c configures the WiFi connection with these settings:
- SSID: network identifier
- PASSWORD: network password
- SECURITY_TYPE: network security
Note: These settings need to be configured by the user!
The WiFi shield based on ESP8266 SoC is connected via an Arduino header using a USART interface. It exposes a CMSIS-Driver WiFi.
This module was tested with the ESP8266 AT command set firmware revision 1.6.2. Refer to Espressif Product Support Download for more information.
The tables below list the device configuration for this board. The board layer for the NXP IMXRT1050-EVKB is using the software component ::Board Support: SDK Project Template: project_template (Variant: evkbimxrt1050) from NXP.EVKB-IMXRT1050_BSP.13.1.0 pack.
The heap/stack setup and the CMSIS-Driver assignment is in configuration files of related software components.
The example project can be re-configured to work on custom hardware. Refer to "Configuring Example Projects with MCUXpresso Config Tools" for information.
| System Component | Setting |
|---|---|
| Device | MIMXRT1052DVL6B |
| Board | IMXRT1050-EVKB |
| SDK Version | ksdk2_0 |
| Heap | 64 kB (configured in linker script MIMXRT1052xxxxx_*.scf file) |
| Stack (MSP) | 1 kB (configured in linker script MIMXRT1052xxxxx_*.scf file) |
| Clock | Setting |
|---|---|
| AHB_CLK_ROOT | 600 MHz |
| IPG_CLK_ROOT | 150 MHz |
| PERCLK_CLK_ROOT | 75 MHz |
| USDHC1_CLK_ROOT | 198 MHz |
| UART_CLK_ROOT | 80 MHz |
| ENET_125M_CLK | 50 MHz |
| ENET_25M_REF_CLK | 25 MHz |
| ENET_TX_CLK | 50 MHz |
Note: configured with Functional Group: BOARD_BootClockRUN
| Functional Group | Pin | Peripheral | Signal | Identifier | Pin Settings | Usage |
|---|---|---|---|---|---|---|
| BOARD_InitDEBUG_UART | K14 | LPUART1 | TX | UART1_TXD | default | UART1 TX for debug console (GPIO_AD_B0_12) |
| BOARD_InitDEBUG_UART | L14 | LPUART1 | RX | UART1_RXD | default | UART1 RX for debug console (GPIO_AD_B0_13) |
| BOARD_InitENET | A7 | ENET | MDC | ENET_MDC | default | Ethernet KSZ8081RNB pin MDC (GPIO_EMC_40) |
| BOARD_InitENET | C7 | ENET | MDIO | ENET_MDIO | default | Ethernet KSZ8081RNB pin MDIO (GPIO_EMC_41) |
| BOARD_InitENET | B13 | ENET | REF_CLK | ENET_TX_CLK | default | Ethernet KSZ8081RNB pin XI (GPIO_B1_10) |
| BOARD_InitENET | E12 | ENET | RX_DATA, 0 | ENET_RXD0 | default | Ethernet KSZ8081RNB pin RXD0 (GPIO_B1_04) |
| BOARD_InitENET | D12 | ENET | RX_DATA, 1 | ENET_RXD1 | default | Ethernet KSZ8081RNB pin RXD1 (GPIO_B1_05) |
| BOARD_InitENET | C12 | ENET | RX_EN | ENET_CRS_DV | default | Ethernet KSZ8081RNB pin CRS_DV (GPIO_B1_06) |
| BOARD_InitENET | C13 | ENET | RX_ER | ENET_RXER | default | Ethernet KSZ8081RNB pin RXER (GPIO_B1_11) |
| BOARD_InitENET | B12 | ENET | TX_DATA, 0 | ENET_TXD0 | default | Ethernet KSZ8081RNB pin TXD0 (GPIO_B1_07) |
| BOARD_InitENET | A12 | ENET | TX_DATA, 1 | ENET_TXD1 | default | Ethernet KSZ8081RNB pin TXD1 (GPIO_B1_08) |
| BOARD_InitENET | A13 | ENET | TX_EN | ENET_TXEN | default | Ethernet KSZ8081RNB pin TXEN (GPIO_B1_09) |
| BOARD_InitUSDHC | J2 | USDHC1 | DATA, 3 | SD1_D3 | default | SD Card pin D3 (GPIO_SD_B0_05) |
| BOARD_InitUSDHC | H2 | USDHC1 | DATA, 2 | SD1_D2 | default | SD Card pin D2 (GPIO_SD_B0_04) |
| BOARD_InitUSDHC | K1 | USDHC1 | DATA, 1 | SD1_D1 | default | SD Card pin D1 (GPIO_SD_B0_03) |
| BOARD_InitUSDHC | J1 | USDHC1 | DATA, 0 | SD1_D0 | default | SD Card pin D0 (GPIO_SD_B0_02) |
| BOARD_InitUSDHC | J4 | USDHC1 | CMD | SD1_CMD | default | SD Card pin CMD (GPIO_SD_B0_00) |
| BOARD_InitUSDHC | J3 | USDHC1 | CLK | SD1_CLK | default | SD Card pin CLK (GPIO_SD_B0_01) |
| BOARD_InitARDUINO_UART | J12 | LPUART3 | TX | LPUART3_TX | default | Arduino UNO R3 pin D1 (GPIO_AD_B1_06) |
| BOARD_InitARDUINO_UART | K10 | LPUART3 | RX | LPUART3_RX | default | Arduino UNO R3 pin D0 (GPIO_AD_B1_07) |
| BOARD_InitUSER_LED | F14 | GPIO1 | gpio_io, 09 | USER_LED | Direction Output, GPIO initial state 1, mode PullUp | User LED (GPIO_AD_B0_09) |
| BOARD_InitUSER_BUTTON | L6 | GPIO5 | gpio_io, 00 | USER_BUTTON | Direction Input, mode PullUp | User Button SW8 (WAKEUP) |
| BOARD_InitI2C | J11 | LPI2C1 | SCL | I2C_SCL_FXOS8700CQ | Software Input On, Open drain | LPI2C1 for FXOS8700CQ (GPIO_AD_B1_00) |
| BOARD_InitI2C | K11 | LPI2C1 | SDA | I2C_SDA_FXOS8700CQ | Software Input On, Open drain | LPI2C1 for FXOS8700CQ (GPIO_AD_B1_01) |
| NVIC Interrupt | Priority |
|---|---|
| ENET | 8 |
| USDHC1 | 8 |
| LPUART3 | 8 |
STDIO is routed to debug console through Virtual COM port (DAP-Link, peripheral = LPUART1, baudrate = 115200)
| CMSIS-Driver | Peripheral |
|---|---|
| ETH_MAC0 | ENET |
| ETH_PHY0 | KSZ8081RNB (external) |
| MCI0 | USDHC1 |
| USART3 | LPUART3 |
| CMSIS-Driver VIO | Physical board hardware |
|---|---|
| vioBUTTON0 | User Button SW8 (WAKEUP) |
| vioLED0 | User LED (GPIO_AD_B0_09) |
| vioMotionAccelero | 3-Axis Accelerometer (FXOS8700CQ) |
| vioMotionMagneto | 3-Axis Magnetometer (FXOS8700CQ) |