zephyr-lvgl-nrf52840-mdk-sample

A simple example of how to use a LVGL widget in Zephyr RTOS running on a nRF52840_mdk board and a ST7789 - 240x240 IPS display

Tests

It was tested in a nRF52840_mdk board.

Driver change

In order to get this display working properly, you have to change zephyr/drivers/display/display_st7789v.c (line 422):

From

#define ST7789V_INIT(inst)                                              \
    static const struct st7789v_config st7789v_config_ ## inst = {      \
        .bus = SPI_DT_SPEC_INST_GET(inst, SPI_OP_MODE_MASTER |          \
                              SPI_WORD_SET(8), 0),                      \

To

#define ST7789V_INIT(inst)                                               \
    static const struct st7789v_config st7789v_config_ ## inst = {       \
        .bus = SPI_DT_SPEC_INST_GET(inst, SPI_OP_MODE_MASTER |           \
        SPI_WORD_SET(8) | SPI_TRANSFER_MSB | SPI_MODE_CPOL, 0),          \

Pinout

nRF52840_mdk	ST7789
P0.28	RES
P0.29	DC (CMD)
P0.27	SCK (SCL)
P0.26	MOSI (SDA)

How to build

$ west build -p auto -b nrf52840_mdk

How to flash

$ west flash

Application running