topic Re: SPI communication on the PN7462 module. in NFC

SPI communication on the PN7462 module.

tuannguyen-aiot — Mon, 17 Mar 2025 08:49:06 GMT

I am experiencing an issue with SPI communication on the PN7462 module.

Setup:

PN7462 is configured as SPI Master.
ESP32 is configured as SPI Slave.
The communication is not successful.
PN7462 SPI Communication Process:
phhalSPIM_Init(1000);
phhalSPIM_Configure(SPI_SLAVE_SELECT, SPI_MSB_FIRST, SPI_MODE, SPI_BAUDRATE, SPI_NSS_PULSE, SPI_NSS_POLARITY);
phhalSPIM_Transmit(SPI_SLAVE_SELECT, 0, 0, 0, sizeof(txData), txData, 0);
phhalSPIM_Receive(SPI_SLAVE_SELECT, 0, 0, sizeof(rxData), rxData, 0);
phhalSPIM_DeInit();
Do you have any suggestions on debugging this issue?

Re: SPI communication on the PN7462 module.

jimmychan — Wed, 19 Mar 2025 07:13:49 GMT

Please check the connection between the master and slave.

Re: SPI communication on the PN7462 module.

tuannguyen-aiot — Wed, 19 Mar 2025 07:17:20 GMT

@jimmychan , Does that mean the program and pin configuration on the PN7462 are correct, right?

Re: SPI communication on the PN7462 module.

jimmychan — Mon, 24 Mar 2025 07:42:58 GMT

According to the API,

* @Param[in] bSlaveSelect Slave select, if false, slave 0 is selected, if true, slave 1 is selected.(value is either ZERO or ONE)

I don't know what is the value of your SlaveSelect. You should match it with your hardware connections.

Also, you may check the data pointer is really pointed to your data array in the Transmit function.