SPI frame size more than 4 bytes

[DNewm.1]

Hello

I working with spc560p and I send or receive with SPI very good and had no problem, but if I want to send or receive more than 4 bytes (32bits) in one message (one chip select), what should I do? 

I used this format for send and receive:

spi_lld_start(&SPID2, &spi_config_Achip);

spi_lld_exchange(&SPID2, 4, txbuf, rxbuf);

spi_lld_stop(&SPID2);

Is there any sample in spc5studio wizard?

[Giuseppe DI-GIORE · Accepted solution]

Hello,

the second parameter of the spi_lld_exchange() defines the number bytes to be transferred in a single exchange operation.

In your example is the to 4 (that i: 4 bytes =  32 bits), just increase it to the number of bytes to be transferred in a single exchange.

For example, to transfer 64 bytes:

spi_lld_start(&SPID2, &spi_config_Achip);

spi_lld_exchange(&SPID2, 64, txbuf, rxbuf);

spi_lld_stop(&SPID2);

Best Regards