Thanks for your answer, that really helps me. I will look into the freertos functions.

Hi there, I'm currently building a LED Matrix which is multiplexed. I want to achieve this by calling an ISR every x ms and send the data inside the ISR via SPI. When I do this it doesn't work, because it fails getting a result from spi_device_get_trans_result Can I even use spi_device_transmit insi...