How to Modify RFAL Library for ST25R3918 Without ST25R3916_CMD_TEST_ACCESS Register

[zeynepdicle]

I am using the ST25R3918 and the 'pollingTagDetect' example from the RFAL library. This chip does not have the ST25R3916_CMD_TEST_ACCESS register.

How can I modify this library?

[zeynepdicle]

Hi,
I explain how I figured it out.

Firstly, I purchased the STM32L476 Nucleo-64 and adjusted my system clock values to match the example NFC06A1_PollingTagDetect's system clock.

I changed the variable value from uint8_t globalCommProtectCnt; to uint8_t globalCommProtectCnt = 0;.

Next, I adjusted the resistor of my PCB antenna matching component.
It is working now and I'm using STM32F0 I can use other STM boards.

Best regards,
ZD

[Brian TIDAL]

Hi,

thanks for your feedback.

The C language guaranties that uninitialized  global variable are implicitly initialized to 0 (practically such variables are allocated in the .bss segment which is memset to 0  by the c runtime initialization). Therefore changing uint8_t globalCommProtectCnt; to uint8_t globalCommProtectCnt = 0;. has no real effect. 

I believe that the real fix is " I adjusted the resistor of my PCB antenna matching component."

Rgds

BT

[zeynepdicle]

Hi,

I believe too, now everything is okay.

Rgds

ZD