adc16_continuous_edma#
Overview#
The ADC16 continuous EDMA demo application demonstrates the usage of the ADC and EDMA 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. EDMA request will be asserted during an ADC16 conversion complete event noted when any of the SC1n[COCO] flags is asserted. EDMA 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-K22F
Hardware requirements
Mini/Micro USB cable
FRDM-K22F 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 EDMA DEMO ADC16_DoAutoCalibration() Done. ADC Full Range: XXXX Press any key to get user channel’s ADC value … ADC value: 14085 ADC value: 13060 ADC value: 16951 ADC value: 18098 ADC value: 12493 ADC value: 22425 ADC value: 19049
FRDM-K32L2A4S
Hardware requirements
Mini/Micro USB cable
FRDM-K32L2A4S 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 EDMA DEMO ADC16_DoAutoCalibration() Done. ADC Full Range: XXXX Press any key to get user channel’s ADC value … ADC value: 24543 ADC value: 26114 ADC value: 21927 ADC value: 20719 ADC value: 17833