Config SPI_1 2 chip selects

Hi Matheus,

We are looking into this and will get back to you.

Lali

Hi Lalindra Jayatilleke, thanks.
I have some extra information:
-> I can active the chip selects
-> But, some thing in the config of the McSPITransfer or the Interrupt are wrong. Maybe this is the problem.
Thanks in advance,

Hi Matheus,

Which platform/ Starterware version are you working with?
Can you also please post the code that you currently have working with CS0 and CS1.
Also, did you take a look at the following example starterware\examples\mcspi\flash\ccs\mcspi_app_flash?

Thanks.

Lali

Hi Lalindra Jayatilleke. I'm sorry, I forgot this information.
So, I'm using a BBB - BeagleBone Black with AM335X_StarterWare_02_00_01_01.
Thanks in advance.

Hi Matheus,

Please take a look at the BBB schematic to see how the SPI1 CS0 and CS1 are routed. SPI1_CS0 is on the P9 header.

Do you have Pin 42 of P9 also muxed for SPI1_CS1?

From your previous comment, how did you verify that both chip selects were activated?

Please post the code of your example that you currently have working. Thanks.

Lali

Hi Lalindra.

I'm using my own board based on BBB, so my cs1 is A15, the config is:

HWREG(SOC_CONTROL_REGS +CONTROL_CONF_XDMA_EVENT_INTR(0))=0xC;//SPI_1-CS_1

i would like to sse any example that use two chip selcts.

My Interrut:

unsigned int intCode = 0;
    intCode = McSPIIntStatusGet(SOC_SPI_1_REGS);
    while (intCode) {
        /*canal 0 - cs0*/
        if (MCSPI_INT_TX_EMPTY(chNum) == (intCode & MCSPI_INT_TX_EMPTY(chNum))) {
            McSPIIntStatusClear(SOC_SPI_1_REGS, MCSPI_INT_TX_EMPTY(chNum));

            length--;

            McSPITransmitData(SOC_SPI_1_REGS, (unsigned int) (*p_tx++), chNum);

            if (!length) {
                McSPIIntDisable(SOC_SPI_1_REGS, MCSPI_INT_TX_EMPTY(chNum));

                McSPIIntStatusClear(SOC_SPI_1_REGS, MCSPI_INT_TX_EMPTY(chNum));
            }
        }

        if (MCSPI_INT_RX_FULL(chNum) == (intCode & MCSPI_INT_RX_FULL(chNum))) {
            McSPIIntStatusClear(SOC_SPI_1_REGS, MCSPI_INT_RX_FULL(chNum));

            *p_rx++ = (unsigned char) McSPIReceiveData(SOC_SPI_1_REGS, chNum);

            if (!(length)) {
                McSPIIntDisable(SOC_SPI_1_REGS, MCSPI_INT_RX_FULL(chNum));

                flagInt1 = 0;
            }
        }

intCode = McSPIIntStatusGet(SOC_SPI_1_REGS);

}

To send:

 p_tx = txBuffer;
    p_rx = rxBuffer;
    length=size;
    // SPIEN line is forced to low state.
    McSPICSAssert(SOC_SPI_1_REGS, channel);

    // Enable the Tx/Rx interrupts of McSPI.
    McSPIIntEnable(SOC_SPI_1_REGS, MCSPI_INT_TX_EMPTY(channel) |
            MCSPI_INT_RX_FULL(channel));

    // Enable the McSPI channel for communication.
    McSPIChannelEnable(SOC_SPI_1_REGS, channel);

    // Wait until control returns back from McSPI ISR.
    while (flagInt1);

    flagInt1 = 1;

    // Force SPIEN line to the inactive state.
    McSPICSDeAssert(SOC_SPI_1_REGS, channel);

    // Disable the McSPI channel.
    McSPIChannelDisable(SOC_SPI_1_REGS, channel);

Maybe there is something wrong in this code.

Thanks in advance