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Micro Speech Example for NXP IMXRT1050-EVKB

This example runs a voice recognition model for two keywords ("yes" and "no") on the IMXRT1050-EVKB. It uses the EVK's built-in microphone (P1). The outcome of the speech recognition is shown in the serial monitor of Keil Studio Cloud.

Click to import in Keil Studio Cloud: Open in Keil Studio

RTOS: Keil RTX5 Real-Time Operating System

The real-time operating system Keil RTX5 implements the resource management.

It is configured with the following settings:

Refer to Configure RTX v5 for a detailed description of all configuration options.

Board: NXP IMXRT1050-EVKB

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 Configuration

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 Configuration

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

GPIO Configuration and usage

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_InitAudio H13 GPIO1 gpio_io, 24 CSI_D9 Direction Input, Rising Edge, mode PullUp AUD_INT for Audio (GPIO_AD_B1_08)
BOARD_InitAudio M13 SAI1 MCLK CSI_D8 Software Input On SAI1_MCLK for Audio (GPIO_AD_B1_09)
BOARD_InitAudio J11 LPI2C1 SCL Not Specified Software Input On, Open drain LPI2C1 for WM8960 (GPIO_AD_B1_00)
BOARD_InitAudio K11 LPI2C1 SDA Not Specified Software Input On, Open drain LPI2C1 for WM8960 (GPIO_AD_B1_01)
BOARD_InitAudio H12 SAI1 RX_DATA, 0 CSI_D5 default SAI1_RXD for Audio (GPIO_AD_B1_12)
BOARD_InitAudio H11 SAI1 TX_DATA, 0 CSI_D4 default SAI1_TXD for Audio (GPIO_AD_B1_13)
BOARD_InitAudio G12 SAI1 TX_BCLK CSI_D3 default SAI1_TX_BCLK for Audio (GPIO_AD_B1_14)
BOARD_InitAudio J14 SAI1 TX_SYNC CSI_D2 default SAI1_TX_SYNC for Audio (GPIO_AD_B1_15)

NVIC Configuration

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 mapping

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)

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Speech example for TFLu

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