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RF430CL330H NFC SPI interface

Sebastien ROUX
Prodigy 40 points

Hi,

I works with RF430 eval kit in SPI mode. All works, but I can't speed up SPI interface. In datasheet it is mentionned 100kHz maximum SPI speed. For the moment I run at 40kHz max !

If I run faster, I have RF430 CRC calculation to 0 ... 

RF430 also need delay between each bytes sent otherwise, CRC calculation is 0...

There is no more informations in datasheet. Is it a bug in RF430 serial interface, in CRC calculation, or ... ?

Thanks,

Sebastien,

  • 0
    Prodigy 40 points

    Hi,

    Nobody wants to help me?

    SPI communication works at 100kHz, Status message and NDEF are ok. Problems come from CRC calculation.

    Find below my CRC calc function:

    PUBLIC uint16_t rf430_crc_calc(uint16_t start_addr, uint16_t len)
{
	uint16_t crc = 0;

	rf430_write_reg(rf430_CRC_START_ADD, start_addr);

	rf430_write_reg(rf430_CRC_LEN, sftALIGN(len, 2));


	while(!(rf430_read_reg(rf430_INT_FLAGS) & rf430_CRC_INT_FLAG));


	crc = rf430_read_reg(rf430_CRC_RESULT);

	rf430_write_reg(rf430_INT_FLAGS, rf430_CRC_INT_FLAG	); //ACK CRC flag

	return crc;
}

    Thanks,

    Sebastien,