- Use MCU :  STM32G473VET- Use connectivity : SPI 3  -> Mode : Full-Duplex Slave 1. It it possible to clear Tx FIFO??"FTLVL" It's not '0' value. how to make '0'? The code used is :1)if(spi3_cs_low == true){HAL_SPI_Transmit_DMA(&hspi3, aTxBuffer, 11);...