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pdm_sai_sdma

pdm_sai_sdma#

Overview#

The pdm sai sdma example shows how to use pdm driver with sdma:

In this example, pdm gather audio data, and sai send it to codec.

Supported Boards#

EVK-MIMX8MM
Hardware requirements

  • Micro USB cable

  • MIMX8MM6-EVK board

  • J-Link Debug Probe

  • 12V power supply

  • Personal Computer

  • Microphone

  • Headphone

Board settings

Connect microphone to EVK board: 3V->J1003-1 GND->J1003-6 CLK->J1003-40 DATA->J1003-38 Connect headphone to J401

Note! This case does not support flash targets because of SDMA2 burst DMA not supporting for accessing flexspi.

Please note this application can’t support running with Linux BSP!

Prepare the Demo

  1. Connect 12V power supply and J-Link Debug Probe to the board, switch SW101 to power on the board

  2. Connect a USB cable between the host PC and the J901 USB port on the target board.

  3. Open a serial terminal with the following settings:

    • 115200 baud rate

    • 8 data bits

    • No parity

    • One stop bit

    • No flow control

  4. Download the program to the target board.

  5. Launch the debugger in your IDE to begin running the demo.

Running the demo

When the demo runs successfully, you can hear the sound from microphone and the log would be seen on the OpenSDA terminal like:

PDM sai sdma example started!
EVK-MIMX8MN
Hardware requirements

  • Micro USB cable

  • MIMX8MN6-EVK board

  • J-Link Debug Probe

  • 12V power supply

  • Personal Computer

  • Microphone

  • Headphone

Board settings

Connect microphone module to EVK board: 3V->J1003-1 GND->J1003-6 CLK->J1003-40 DATA->J1003-38 Connect headphone to J401

Note! 1.This case does not support flash targets because of SDMA2 burst DMA not supporting for accessing flexspi. 2.There are two microphones on module, please put the sound source in the middle of microphones for balance.

Please note this application can’t support running with Linux BSP!

Prepare the Demo

  1. Connect 12V power supply and J-Link Debug Probe to the board, switch SW101 to power on the board

  2. Connect a USB cable between the host PC and the J901 USB port on the target board.

  3. Open a serial terminal with the following settings:

    • 115200 baud rate

    • 8 data bits

    • No parity

    • One stop bit

    • No flow control

  4. Download the program to the target board.

  5. Launch the debugger in your IDE to begin running the demo.

Running the demo

When the demo runs successfully, you can hear the sound from microphone and the log would be seen on the OpenSDA terminal like:

PDM sai sdma example started!
EVK-MIMX8MNDDR3L
Hardware requirements

  • Micro USB cable

  • MIMX8MN6-EVK board

  • J-Link Debug Probe

  • 12V power supply

  • Personal Computer

  • Microphone

  • Headphone

Board settings

Connect microphone module to EVK board: 3V->J1003-1 GND->J1003-6 CLK->J1003-40 DATA->J1003-38 Connect headphone to J401

Note! 1.This case does not support flash targets because of SDMA2 burst DMA not supporting for accessing flexspi. 2.There are two microphones on module, please put the sound source in the middle of microphones for balance.

Please note this application can’t support running with Linux BSP!

Prepare the Demo

  1. Connect 12V power supply and J-Link Debug Probe to the board, switch SW101 to power on the board

  2. Connect a USB cable between the host PC and the J901 USB port on the target board.

  3. Open a serial terminal with the following settings:

    • 115200 baud rate

    • 8 data bits

    • No parity

    • One stop bit

    • No flow control

  4. Download the program to the target board.

  5. Launch the debugger in your IDE to begin running the demo.

Running the demo

When the demo runs successfully, you can hear the sound from microphone and the log would be seen on the OpenSDA terminal like:

PDM sai sdma example started!
EVK-MIMX8MP
Hardware requirements

  • Micro USB cable

  • EVK-MIMX8M Plus board

  • J-Link Debug Probe

  • 12V power supply

  • Personal Computer

  • Microphone

  • Headphone

Board settings

Connect microphone module to EVK board: 3V->J21-1 GND->J21-6 CLK->J21-40 DATA->J21-38 Connect headphone to J18

NOTE

  1. There are two microphones on module, please put the sound source in the middle of microphones for balance.

  2. Please note this application can’t support running with Linux BSP!

Prepare the Demo

  1. Connect 12V power supply and J-Link Debug Probe to the board, switch SW3 to power on the board

  2. Connect a USB cable between the host PC and the J23 USB port on the target board.

  3. Open a serial terminal with the following settings:

    • 115200 baud rate

    • 8 data bits

    • No parity

    • One stop bit

    • No flow control

  4. Download the program to the target board.

  5. Launch the debugger in your IDE to begin running the demo.

Running the demo

When the demo runs successfully, you can hear the sound gathered from microphone and the log would be seen on the debugger terminal like:

PDM sai sdma example started!
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