Hi,
The STSW-ST25R011 package is for ST25R3916‑DISCO, not for ST25R3911B-DISCO. The peripheral and pin assignment are different on those 2 boards and STSW-ST25R011 is not expected to run on ST25R3911B-DISCO.
The ST25R3916‑DISCO and the ST25R3911B-DISCO does not have the same USB PID. The ST25R3916 Discovery graphical user interface is designed for ST25R3916 and uses the ST25R3916-DISCO PID to enable the communication with this device. Therefore, the ST25R3916 Discovery graphical user interface cannot communicate with ST25R3911B (unless you modify the USB PID).
Let's focus on your initial issue. Would you please confirm my understanding of your setup and share more details:
- ST25DX-Discovery MBoard: is it MB1396 revision A?
- ST25R3916 custom board
- connected to the ST25DX-Discovery MBoard as a daughter board
- or having its own MCU?
- Communication interface used between the MCU and the ST25R3916: SPI or I2C?
- your plan is to use the ST25R3916 Discovery graphical user interface to communicate with the ST25DX-Discovery MBoard + custom ST25R3916 board through USB ? In that case, you just need to run the STSW-ST25R011 package on ST25DX-Discovery MBoard and switch to USB mode as previously described. If your plan is to have your own firmware running on your own MCU, make sure to have the proper USB PID (see USBD_PID_FS value in usbd_desc.c)
Regarding your question on the user button;
#define ST25_DISCOVERY_KEY_BUTTON_PIN GPIO_PIN_6
#define ST25_DISCOVERY_KEY_BUTTON_GPIO_PORT GPIOE
(see st25_dsicovery.h)
gpio_initstruct.Pin = BUTTON_PIN[Button];
gpio_initstruct.Mode = GPIO_MODE_INPUT;
gpio_initstruct.Pull = GPIO_PULLDOWN;
gpio_initstruct.Speed = GPIO_SPEED_FREQ_HIGH;
HAL_GPIO_Init( BUTTON_PORT[Button], &gpio_initstruct );
(see st25_discovery.c)
Rgds
BT
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