SPI Communication SPC58EC MCU

[RSeba.2]

Hello,

Currently I am working with SPI communication in SPC58EC DISP Discovery board. I wanted to evaluate communication between  MS-SL and SL-MS. I have configured SPID1 as master and SPID2 as slave. I was able to send data from master to slave using  below functions. 
spi_lld_receive(&SPID2, TRANSFER_BUFFER_SIZE, &spihandler_rx_fifo);
spi_lld_send(&SPID1, TRANSFER_BUFFER_SIZE, transmitBuff);
But how can I transmit data from slave to master ? Can I use the same functions for it or should I use spi_lld_exchange?

Thanks and regards.

[TDK]

spi_lld_exchange is a two-way SPI transfer which can work. Note that the master has to initiate all transfers. That is to say, spi_lld_exchange/spi_lld_send on the slave must be called before spi_lld_exchange/spi_lld_receive is called on the master.

[RSeba.2]

Thanks for this information. But I couldn't receive all the data that I sent out from slave in master. 
I have used the following configuration.

const SPIConfig spi_config_master = {
SPI_MASTER,
0,
PORT_E,
8,
0UL | SPC5_CTAR_FMSZ(8) |
SPC5_CTAR_PCSSCK_PRE1 | SPC5_CTAR_PASC_PRE1 |
SPC5_CTAR_PDT_PRE1 | SPC5_CTAR_PBR_PRE2 |
SPC5_CTAR_CSSCK_DIV4 | SPC5_CTAR_ASC_DIV4 |
SPC5_CTAR_DT_DIV2 | SPC5_CTAR_BR_DIV2,
0UL | SPC5_PUSHR_CONT | SPC5_PUSHR_CTAS(0) | SPC5_PUSHR_PCS(1)
};

/**
* @brief Structure defining the SPI configuration "slave".
*/
const SPIConfig spi_config_slave = {
SPI_SLAVE,
0,
PORT_A,
4,
0UL | SPC5_CTAR_FMSZ(8) ,
0
//0UL | SPC5_PUSHR_CONT | SPC5_PUSHR_CTAS(0) | SPC5_PUSHR_PCS(0)
};
 I have used the following functions.

spi_lld_send(&SPID2, TRANSFER_BUFFER_SIZE, transmitBuff); //slave transmit
spi_lld_receive(&SPID1, TRANSFER_BUFFER_SIZE, &spihandler_mrx_fifo);

Do you know what might be the problems?

[RSeba.2]

..

[TDK]

How are you ensuring the slave calls its SPI transfer function before the master calls its SPI transfer function?

[RSeba.2]

case 'a':

debug_print_string("Starting SPI frame transmission from master:");
debug_print_crlf();
debug_print_string("Test case for command: FRCMD_GET_STATUS ");
debug_print_crlf();

tfsend_prepare(&tfc_spihandler, TF_ID_COMMAND, FRCMD_GET_STATUS);
tfsend_flush(&tfc_spihandler);
spi_lld_send(&SPID1, TRANSFER_BUFFER_SIZE, transmitBuff);

/* Slave transmit */
for (int i = 0; i < TRANSFER_BUFFER_SIZE; i++) {
transmitBuff_test[i] = 0x11;
}
spi_lld_send(&SPID2, TRANSFER_BUFFER_SIZE, transmitBuff_test);  //slave

spi_lld_receive(&SPID1, TRANSFER_BUFFER_SIZE, &spihandler_mrx_fifo); //master

break;

Case 'a' is input from the keyboard. When I press 'a', above code is executed.
Here, spi_lld_send(&SPID2, TRANSFER_BUFFER_SIZE, transmitBuff_test) of slave is called                                     before master receive function spi_lld_receive(&SPID1, TRANSFER_BUFFER_SIZE, &spihandler_mrx_fifo);