SPI Problem

Fatemeh,

You are almost there, but there is a problem with your code.
SPI1 is used as Master, SPI2 is used as Slave. I assume the connection are done between SPI1 and SPI2 at board level.

In your main code, after doing the initialization of SPI1 and SPI2 (call to spiInit()) you only call the spiTransmitAndReceiveData for SPI1.

This will start the transmission of TX_Data_Master, with the correct data, but SPI2 is not ready to receive or transmit.

It is necessary to start the slave first by calling spiTransmitAndReceiveData if you want the Slave to receive the data from Master, but also to transmit data to the Master.

Here a main code example:

/* USER CODE BEGIN (2) */
uint16 TX_Data_Master[16] = { 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x10 };
uint16 TX_Data_Slave[16]  = { 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F, 0x20 };
uint16 RX_Data_Master[16] = { 0 };
uint16 RX_Data_Slave[16]  = { 0 };
/* USER CODE END */

void main(void)
{
/* USER CODE BEGIN (3) */
    char command1[2];
    int i;
    spiDAT1_t dataconfig1_t;
    dataconfig1_t.CS_HOLD = FALSE;
    dataconfig1_t.WDEL    = TRUE;
    dataconfig1_t.DFSEL   = SPI_FMT_0;
    dataconfig1_t.CSNR    = 0xFC;


    /* Initialize SPI Module Based on GUI configuration
     * SPI1 - Master ( SIMO, SOMI, CLK, CS0 )
     * SPI2 - Slave  ( SIMO, SOMI, CLK, CS0 )
     * */
    spiInit();

    while(1)
    {
        /* Initiate SPI1 Transmit and Receive through Polling Mode*/
        spiTransmitAndReceiveData(spiREG2, &dataconfig1_t, 16, TX_Data_Slave, RX_Data_Slave);
        /* Initiate SPI1 Transmit and Receive through Polling Mode*/
        spiTransmitAndReceiveData(spiREG1, &dataconfig1_t, 16, TX_Data_Master, RX_Data_Master);
        for(i=0;i<16;i++)
        {
            printf("%d TX_Data_Slave: 0x%04x RX_Data_Slave: 0x%04x TX_Data_Master: 0x%04x RX_Data_Master: 0x%04x\r\n",i, TX_Data_Slave[i], RX_Data_Slave[i], TX_Data_Master[i], RX_Data_Master[i]);
        }
    }
/* USER CODE END */
}

 

Please have a try and let me know.

Jean-Marc,

Thanks for your help, As you mentioned I changed the code, but now when I call “spiTransmitAndReceiveData” function to service Slave (SPI2), code gets stuck in this loop "while((spi->FLG & 0x00000100U) != 0x00000100U) { } /* Wait */ "

Best Regards,
Fatemeh

Jean-Marc,

There isn’t any connection between SPI1 and SPI2 at board level and unfortunately I didn't pay attention to this issue at that time.
After I did the wiring externally, by using the interrupt module, I can receive the data I sent, it means the SPI (using interrupt) is working fine now.
But the connection using polling method is not working yet. Can you help me to get this communication by polling method?


Best Regards,
Fatemeh

Fatemeh,

What are the connection that you did between SPI1 and SPI2?

Are you using 3 pin mode (SOMI, SIMO, CLK) or 4 pin mode (SOMI, SIMO, CLK, CSx)

In Halcogen, on the SPI2 Port Tab, you should have SOMI, SIMO and CLK defined as SPI function (no GIO)
If CS0 is also defined as SPI (not GIO) than it is necessary to have the same on the Master side and connect the CS line between Master and Slave.

Jean-Marc,

Thank you again for your reply, it was really helpful.

Best Regards,
Fatemeh