Hello,
Yes now I have tried to call st25r3911Isr(); function from interrupt service routine ,it is observed that control come in isr of interrupt only once and then it gets stuck in st25r3911ReadMultipleRegisters() function on line,
/* Since the result comes one byte later, let's first transmit the adddress with discarding the result */
platformSpiTxRx(&cmd, NULL, ST25R3911_CMD_LEN);
Initial spi communication works fine and one time interrupt comes but after that spi communication is not completing and getting stuck here in st25r3911_com.c file.
Why is it happening that after receiving int from nfc IC SPI communication is not working,
void st25r3911ReadMultipleRegisters(uint8_t reg, uint8_t* values, uint8_t length)
{
#if !defined(ST25R391X_COM_SINGLETXRX)
uint8_t cmd = (reg | ST25R3911_READ_MODE);
#endif /* !ST25R391X_COM_SINGLETXRX */
if (length > 0U)
{
platformProtectST25R391xComm();
platformSpiSelect();
NOP(); NOP();
#ifdef ST25R391X_COM_SINGLETXRX
ST_MEMSET( comBuf, 0x00, MIN( (ST25R3911_CMD_LEN + (uint32_t)length), ST25R3911_BUF_LEN ) );
comBuf[0] = (reg | ST25R3911_READ_MODE);
platformSpiTxRx(comBuf, comBuf, MIN( (ST25R3911_CMD_LEN + length), ST25R3911_BUF_LEN ) ); /* Transceive as a single SPI call */
while(SPI_TX_flag==0)
{
;
}
ST_MEMCPY( values, &comBuf[ST25R3911_CMD_LEN], MIN( length, ST25R3911_BUF_LEN - ST25R3911_CMD_LEN ) ); /* Copy from local buf to output buffer and skip cmd byte */
#else /* ST25R391X_COM_SINGLETXRX */
/* Since the result comes one byte later, let's first transmit the adddress with discarding the result */
platformSpiTxRx(&cmd, NULL, ST25R3911_CMD_LEN);
while(SPI_TX_flag==0) // SPI_TX_flag not setting to 1
{
;
}
platformSpiTxRx(NULL, values, length);
while(SPI_TX_flag==0)
{
;
}
#endif /* ST25R391X_COM_SINGLETXRX */
NOP(); NOP();
platformSpiDeselect();
platformUnprotectST25R391xComm();
}
return;
}
,
