I am developing a product based on the AS3993, AKA ST25RU3993. I have been using the FEMTO module (by AMS) to test my application code.
So far I was able to verify the initialization, SPI, interrupt line, cristall stabilization and PLL lock. Everything seems to be OK.
I am now trying to read a TAG.
Using the defautl configurations of the FEMTO, as follow:
In order to start reading a tag. I first write the values above in the registers, then I enable the bit RF_ON on register 0x00.
After send the Query command 0x98 and write the following bytes to the FIFO:
//dr = 0b01
//m = 0b10
//Trext = 0b00
//sel = 0b00
//session = 0b00
//target = 0b00
//q = 0b00
After that I start to wait for the end of tx interrupt, but I detect a irq_noresp instead.