ST25R3911B SPI and ST25R3911B Discovery GUI has no commincatin

I think I have a problem in Setting up yet .

I use ST25R3911B_DISCO_FW_v1_2_00 frimware as a sample code but my ST mcu is STM32F215 64PIN .

i am not sure even my spi setting is ok or not :

 hspi2.Instance = SPI2;

 hspi2.Init.Mode = SPI_MODE_MASTER;

 hspi2.Init.Direction = SPI_DIRECTION_2LINES;

 hspi2.Init.DataSize = SPI_DATASIZE_8BIT;

 hspi2.Init.CLKPolarity = SPI_POLARITY_LOW;

 hspi2.Init.CLKPhase = SPI_PHASE_2EDGE;

 hspi2.Init.NSS = SPI_NSS_SOFT;

 hspi2.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_128;

 hspi2.Init.FirstBit = SPI_FIRSTBIT_MSB;

 hspi2.Init.TIMode = SPI_TIMODE_DISABLE;

 hspi2.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE;

 hspi2.Init.CRCPolynomial = 7;

by the above spi setting i have signlas in mosi and sck pins .

but I am not sure they are ok .

is there anyone to help me in my step now?

now I find out that /cs pin is connected to Gnd in my pcb and I can not find its point .

by the way be gnd for spi_cs is donot care and it has to work. am I right?

or I have to fixed it at first ?

Dear Dariush,

The !CS line is crucial for the SPI interface to work.

Please crosscheck the schematic shown in UM2042 page 11, 12 (Usermanual of the ST25R3911B-DISCO available on www.st.com) with your schematic.

The !CS line should be driven by the MCU and not tied to one potential.

BR Travis

My problem solved and now I have a SPI communication by st25r3911b .

my new problems are :

1- External interrupt pin does not changed at all , I think when i close a mifare card in its antenna is should change , am I right ?

2- The ST25R3911B Discovery GUI program has no communication to it, I make a usb device for it and I am not sure in windows Device Manager what driver should add when ever I connect it to PC.

any help would be welcome

​Dear Dariush,

1.)

When enabeling the en and tx_en bit, do you see a signal on the RFO pins?

When sending a direct command D3 (measure amplitude) to the ST25R3911B, an interrupt will be generated by the ST25R3911B afterwards. If you do not see any interrupt, i would recommend to check the following items:

A.) Check resistance of IRQ line against VDD, VDD_IO, GND. (board disconnected, should be higher than 100k)

B.) Probe with a scope the IRQ line during sending a D3 command.

C.) Check voltage level of VDD_IO supply

D.) Probe with a scope, if the OSC is working propperly when bit "en" is set.

2.) When the ST25R3911B-DISCO board is connected you should be able to find a HID Device with HID\VID_0483&PID_3721&REV_0200&MI_00 .

The driver is delivered by Microsoft / Windows. No additional installation needed.

BR Travis

Hi Dariush,

not sure I understand what you actually do to get an interrupt from ST25R3911B. Without communicating to ST25R3911B it will not do anything autonomously. You do have here two options:

1. Normal operation mode: You enable oscillator, enable the field, and call proper methods (e.g. from our RFAL layer to send frames and receive response frames from the card - or
2. you configure the ST25R3911B in wake-up mode where it autonomously runs a low power cycle in which it sends out short field pulses and senses detuning of the antenna. Please refer to AN4985.

Regards, Ulysses

Thank you

about ST25R3911B Discovery GUI program , now I have hid device in my control panel and I am sure that driver is OK .

but still I have no communication in usb :

 */
int main(void)
{
 /* USER CODE BEGIN 1 */
 
 /* USER CODE END 1 */
 
 /* MCU Configuration----------------------------------------------------------*/
 
 /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
 HAL_Init();
 
 /* USER CODE BEGIN Init */
 
 /* USER CODE END Init */
 
 /* Configure the system clock */
 SystemClock_Config();
 
 /* USER CODE BEGIN SysInit */
 
 /* USER CODE END SysInit */
 
 /* Initialize all configured peripherals */
 MX_GPIO_Init();
 MX_USART2_UART_Init();
 MX_USB_DEVICE_Init();
 MX_SPI2_Init();
 
 spiInit(&hspi2);
 /* USER CODE BEGIN 2 */
 logUsartInit(&huart2);
 logUsart("Welcome to DISCO-STM32L4x6\r\n");
 
 rfalAnalogConfigInitialize();
 logUsart("DARIUSH\r\n");
 if( rfalInitialize() == ERR_NONE )logUsart("rfalInitialize ok\r\n");
 
 else 	logUsart(" rfalInitialize error\r\n");
 /* USER CODE END 2 */
 StreamDispatcherInit();
 /* Infinite loop */
 /* USER CODE BEGIN WHILE */
 while (1)
 {
	 rfalWorker();
	 dispatcherInterruptHandler();
	 ProcessIO();
//aa++;
 
 /* USER CODE END WHILE */
 
 /* USER CODE BEGIN 3 */
 
 }
 /* USER CODE END 3 */
 
}
 
/**
 * @brief System Clock Configuration
 * @retval None
 */

Hi Dariush,

The GUI uses USB VID and PID to identify the boards. Please carefully review the USB descriptors.

Ulysses

Dear Ulysses

Thank you for your reply

Would you please tell me more about that ?

What I have to do in my own project ?