Hi,
I have made a custom design for reading/writing NTAG213 tags based on the X-NUCLEO-NFC06A1 board. I have adapted the firmware that works on this demo board (along with all the drivers related to the ST25R3916 and RFAL) into a STM32G030K8T6 microcontroller.
I have neither capacitive sensing nor AAT implemented in Hardware and I have also disabled these mechanisms in the Firmware according to this post.
The antenna design is very similar to the ST25R3916 Discovery Board (2 turns, 65mm x 85 mm). For the the antenna analysis I have measured its real parameters following the indications of the AN5276 Application Note:
This is LANT = 1.03 uH RSDC = 440m Ohms fres = 60.19 MHz Rp @ fres = 7.29 Kohms
Buy using the ST25R Antenna Matching Tool I get the following values for the custom board:
On the Firmware side the Initialization is successful (ERR_NONE)... but does not detect any tag during execution of the detection cycle routines.
I have checked the presence of any signal near the antenna by means of a small loop made with the oscilloscope probe. I see that the antenna is actually emitting at 13.56MHz every second.
Everything seems to be correct but why can't I detect any tag?
gaston
Hi Ulysses,
Well, the ISR works as expected but thanks to your suggestion I've realized that the callback is never called!...and st25r3916Isr() function never executed.
Digging into it I see the ISR callback implementation in G0 family is quite different from L0 and L5 what have I used to do the porting.
I have finally been able to fix it by modifying the stm32g0xx_hal_gpio.c file but this is not supposed to be done.
How can I get the same functionality without modifying the HAL file?
I've also seen another post about this but no ST employee has answered and I would like to know your opinion.
regards,
gaston
