adc16_continuous_dma#
Overview#
The ADC16 continuous DMA demo application demonstrates the usage of the ADC and DMA peripheral while in a continuous mode. The ADC16 is first set to continuous mode. In continuous convert configuration, only the initial rising-edge to launch continuous conversions is observed, and until conversion is aborted, the ADC16 continues to do conversions on the same SCn register that initiated the conversion. DMA request will be asserted during an ADC16 conversion complete event noted when any of the SC1n[COCO] flags is asserted. DMA will transfer ADC16 results to memory and if users press any key, demo will average ADC16 results stored in memory and print average on the terminal.
Supported Boards#
FRDM-K32L2B
Hardware requirements
Mini/Micro USB cable
FRDM-K32L2B board
Personal Computer
Board settings
No special is needed.
Prepare the Demo
Connect a USB cable between the PC host and the OpenSDA USB port on the board.
Open a serial terminal on PC for OpenSDA serial device with these settings:
115200 baud rate
8 data bits
No parity
One stop bit
No flow control
Connect external signal source to user-defined channel, defined by “DEMO_ADC16_CHANNEL” in source code. Shorten jumper J19 to use external reference voltage pair pins.
Download the program to the target board.
Either press the reset button on your board or 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 OpenSDA terminal like:
ADC16 CONTINUOUS DMA DEMO ADC16_DoAutoCalibration() Done. ADC Full Range: XXXX Press any key to get user channel’s ADC value … ADC value: 32878 ADC value: 34463 ADC value: 36226 ADC value: 32819 ADC value: 37477
FRDM-MCXC242
Hardware requirements
USB-C cable
FRDM-MCXC242 board
Personal Computer
Board settings
No special is needed.
Prepare the Demo
Connect a USB cable between the PC host and the OpenSDA USB port on the board.
Open a serial terminal on PC for OpenSDA serial device with these settings:
115200 baud rate
8 data bits
No parity
One stop bit
No flow control
Connect external signal source to user-defined channel, defined by “DEMO_ADC16_CHANNEL” in source code.
Download the program to the target board.
Either press the reset button on your board or 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 OpenSDA terminal like:
ADC16 CONTINUOUS DMA DEMO ADC16_DoAutoCalibration() Done. ADC Full Range: XXXX Press any key to get user channel’s ADC value … ADC value: 31747 ADC value: 31750 ADC value: 31666 ADC value: 31457 ADC value: 30123
FRDM-MCXC444
Hardware requirements
Type-C USB cable
FRDM-MCXC444 board
Personal Computer
Board settings
No special is needed.
Prepare the Demo
Connect a type-c USB cable between the host PC and the MCU-Link USB port (J13) 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
Connect external signal source J6-2 to user-defined channel, defined by “DEMO_ADC16_CHANNEL” in source code. Shorten jumper JP6 to use external reference voltage pair pins.
Download the program to the target board.
Either press the reset button on your board or 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:
ADC16 CONTINUOUS DMA DEMO ADC16_DoAutoCalibration() Done. ADC Full Range: XXXX Press any key to get user channel’s ADC value … ADC value: 32878 ADC value: 34463 ADC value: 36226 ADC value: 32819 ADC value: 37477