dmic_dma#
Overview#
This example shows how to use DMA to transfer data from DMIC to memory.
Supported Boards#
EVK-MIMXRT595
Hardware requirements
Micro USB cable
EVK-MIMXRT595 board
Personal Computer
Board settings
Prepare the Demo
Connect a micro USB cable between the PC host and the CMSIS DAP USB port on the board
Open a serial terminal with the following settings:
115200 baud rate
8 data bits
No parity
One stop bit
No flow control
Download the program to the target board.
Launch the debugger in your IDE to begin running the demo.
Running the demo
When the demo runs successfully, the log would be seen on the terminal like:
Configure DMA
Buffer Data before transfer
<data>
Transfer completed
Buffer Data after transfer
<data>
This example shows how DMA can be used with DMIC to transfer data to memory.DMIC audio data can also be seen in g_rxBuffer. Initially this buffer is initialized to zero.
EVK-MIMXRT685
Hardware requirements
Micro USB cable
EVK-MIMXRT685 board
Personal Computer
Board settings
Prepare the Demo
Connect a micro USB cable between the PC host and the CMSIS DAP USB port (J5) on the board
Open a serial terminal with the following settings:
115200 baud rate
8 data bits
No parity
One stop bit
No flow control
Download the program to the target board.
Launch the debugger in your IDE to begin running the demo.
Running the demo
When the demo runs successfully, the log would be seen on the terminal like:
Configure DMA
Buffer Data before transfer
<data>
Transfer completed
Buffer Data after transfer
<data>
This example shows how DMA can be used with DMIC to transfer data to memory.DMIC audio data can also be seen in g_rxBuffer. Intially this buffer is initialized to zero.
LPCXpresso54628
Hardware requirements
Micro USB cable
LPCXpresso54628 board
Personal Computer
Board settings
No special settings are required.
Prepare the Demo
Connect a micro USB cable between the host PC and the LPC-Link USB port (J8) on the target board.
Open a serial terminal with the following settings:
115200 baud rate
8 data bits
No parity
One stop bit
No flow control
Download the program to the target board.
Running the demo
Either press the reset button on your board or launch the debugger in your IDE to begin running the demo. Whole buffer before and after data transfer will be displayed. All data before transfer is 0 and data in the buffer after transfer is dmic data which is now different. The following lines are printed to the serial terminal when the demo program is executed.
Configure DMA Buffer Data before transfer Transfer completed Buffer Data after transfer
This example shows how DMA can be used with DMIC to transfer data to memory.DMIC audio data can also be seen in g_rxBuffer. Intially this buffer is initialized to zero.
LPCXpresso54S018
Hardware requirements
Micro USB cable
LPCXpresso54S018 board
Personal Computer
Board settings
No special settings are required.
Prepare the Demo
Connect a micro USB cable between the host PC and the LPC-Link USB port (J8) on the target board.
Open a serial terminal with the following settings:
115200 baud rate
8 data bits
No parity
One stop bit
No flow control
Download the program to the target board.
Running the demo
This demo is an external flash plain load demo, ROM will copy image in external flash to SRAMX to run:
Build the demo to generate a bin file. Note: If need to generate bin file using MCUXpresso IDE, below steps need to be followed: Set in example Properties->C/C++ Build->Settings->Build steps->Post-build steps->Edit enbable arm-none-eabi-objcopy -v -O binary “&{BuildArtifactFileName}” “&{BuildArtifactFileBaseName}.bin”
This plainload example linked the vector table to 0x00000000, but program to external flash 0x10000000.
Program the bin file to external on board flash via SEGGER J-FLASH Lite(V6.22 or higher):
a. Open SEGGER J-FLASH Lite, select device LPC54S018.
b. Click the ‘Erase Chip’ to erase the extrenal flash.(if can not success, press SW4 button and reset the board, and try to erase again)
c. Select the bin data file, set the ‘.bin/Erase Start’ address to 0x10000000, then click ‘Program Device’ Note: Please use above way to program the binary file built by armgcc tool chain to external flash. For IAR, KEIL, MCUXpresso IDE, you can use the IDE tool to program the external flash.
Launch the debugger in your IDE to begin running the demo. Whole buffer before and after data transfer will be displayed. All data before transfer is 0 and data in the buffer after transfer is dmic data which is now different. The following lines are printed to the serial terminal when the demo program is executed.
Configure DMA Buffer Data before transfer Transfer completed Buffer Data after transfer
This example shows how DMA can be used with DMIC to transfer data to memory.DMIC audio data can also be seen in g_rxBuffer. Intially this buffer is initialized to zero.
LPCXpresso54S018M
Hardware requirements
Micro USB cable
LPCXpresso54S018M board
Personal Computer
Board settings
No special settings are required.
Prepare the Demo
Connect a micro USB cable between the host PC and the LPC-Link USB port (J8) on the target board.
Open a serial terminal with the following settings:
115200 baud rate
8 data bits
No parity
One stop bit
No flow control
Download the program to the target board.
Running the demo
This demo is an external flash plain load demo, ROM will copy image in external flash to SRAMX to run:
Build the demo to generate a bin file. Note: If need to generate bin file using MCUXpresso IDE, below steps need to be followed: Set in example Properties->C/C++ Build->Settings->Build steps->Post-build steps->Edit enbable arm-none-eabi-objcopy -v -O binary “&{BuildArtifactFileName}” “&{BuildArtifactFileBaseName}.bin”
This plainload example linked the vector table to 0x00000000, but program to external flash 0x10000000.
Program the bin file to external on board flash via SEGGER J-FLASH Lite(V6.22 or higher):
a. Open SEGGER J-FLASH Lite, select device LPC54S018M.
b. Click the ‘Erase Chip’ to erase the extrenal flash.(if can not success, press SW4 button and reset the board, and try to erase again)
c. Select the bin data file, set the ‘.bin/Erase Start’ address to 0x10000000, then click ‘Program Device’ Note: Please use above way to program the binary file built by armgcc tool chain to external flash. For IAR, KEIL, MCUXpresso IDE, you can use the IDE tool to program the external flash.
Launch the debugger in your IDE to begin running the demo. Whole buffer before and after data transfer will be displayed. All data before transfer is 0 and data in the buffer after transfer is dmic data which is now different. The following lines are printed to the serial terminal when the demo program is executed.
Configure DMA Buffer Data before transfer Transfer completed Buffer Data after transfer
This example shows how DMA can be used with DMIC to transfer data to memory.DMIC audio data can also be seen in g_rxBuffer. Intially this buffer is initialized to zero.
LPCXpresso55S36
Hardware requirements
Micro USB cable
LPCXpresso55S36 boards
Personal Computer
Board settings
Prepare the Demo
Connect a micro USB cable between the PC host and the CMSIS DAP USB port (J1) on the board
Open a serial terminal with the following settings:
115200 baud rate
8 data bits
No parity
One stop bit
No flow control
Download the program to the target board.
Launch the debugger in your IDE to begin running the demo.
Running the demo
When the demo runs successfully, the log would be seen on the terminal like:
Configure DMA
Buffer Data before transfer
<data>
Transfer completed
Buffer Data after transfer
<data>
This example shows how DMA can be used with DMIC to transfer data to memory.DMIC audio data can also be seen in g_rxBuffer. Intially this buffer is initialized to zero.
MIMXRT685-AUD-EVK
Hardware requirements
Micro USB cable
MIMXRT685-AUD-EVK board
Personal Computer
Board settings
Connect JP44 1-2,JP45 1-2
Prepare the Demo
Connect a micro USB cable between the PC host and the CMSIS DAP USB port (J5) on the board
Open a serial terminal with the following settings:
115200 baud rate
8 data bits
No parity
One stop bit
No flow control
Download the program to the target board.
Launch the debugger in your IDE to begin running the demo.
Running the demo
When the demo runs successfully, the log would be seen on the terminal like:
Configure DMA
Buffer Data before transfer
<data>
Transfer completed
Buffer Data after transfer
<data>
This example shows how DMA can be used with DMIC to transfer data to memory.DMIC audio data can also be seen in g_rxBuffer. Intially this buffer is initialized to zero.
RD-RW612-BGA
Hardware requirements
Micro USB cable
RD-RW612-BGA board
Personal Computer
Board settings
No special settings are required.
Prepare the Demo
Connect a micro USB cable between the PC host and the MCU-Link USB port (J7) on the board
Open a serial terminal with the following settings:
115200 baud rate
8 data bits
No parity
One stop bit
No flow control
Download the program to the target board.
Launch the debugger in your IDE to begin running the demo.
Running the demo
When the demo runs successfully, the log would be seen on the terminal like:
Configure DMA
Buffer Data before transfer
<data>
Transfer completed
Buffer Data after transfer
<data>
This example shows how DMA can be used with DMIC to transfer data to memory.DMIC audio data can also be seen in g_rxBuffer. Intially this buffer is initialized to zero.