I am trying to send a packet using the slave chip instead of master. What I do is call set_SPI_slave() in tx_start function instead of set_SPI_master(). In this case, dwt_starttx() returns DWT_SUCCESS. However, I am not able to receive the interrupt of TX done so that I can make sure my transmission is successful. I tried to activate the interrupts on the slave chip but it seems like it doesn’t work. Is there any solution to send data over the slave chip ?