I hooked up two STM32L432 nucleo boards in master-salve mode of SPI. I am setting up DMA and SPI with 8 bit (BYTE) boundary and data width. If I set the FRXTH threshold for SPI as LL_SPI_RX_FIFO_TH_HALF the slave DMAs dont get transfer completes both for Tx and Rx. I found by toggling GPIOs in the call back functions for both RX and TX. But if I do set the treshold as LL_SPI_RX_FIFO_TH_QUARTER I see everything is fine... My question is do these thresholds have anything to do with the data size settings???... Thanks.