HT16K33 LED driver with keyscan
This sample controls the LEDs connected to a Holtek HT16K33  driver. The sample supports up to 128 LEDs connected to the rows/columns of the HT16K33.
The LEDs are controlled using the following pattern:
turn on all connected (up to 128) LEDs one-by-one
blink the LEDs at 2 Hz, 1 Hz, and 0.5 Hz
reduce the brightness gradually from 100% to 0%
turn off all LEDs, restore 100% brightness, and start over
The sample logs keyscan events on the console.
Building and Running
Build the application for the nRF52840 DK board, and connect a HT16K33 LED driver at address 0x70 on the I2C-0 bus.
west build -b nrf52840dk_nrf52840 samples/drivers/ht16k33
For flashing the application, refer to the Flashing section of the nRF52840 DK board documentation.