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more than one device on SPI

taiyc
Prodigy 140 points

Hi,

I'm using BIOS 5.41, CCS 3.3 with c6747 on a custom board.

I'm using GIO_Handle to implement data transfer on SPI1:

bios.UDEV.create("ADISIMUSpi1");
bios.UDEV.instance("ADISIMUSpi1").fxnTableType = "IOM_Fxns";
bios.UDEV.instance("ADISIMUSpi1").initFxn = prog.extern("ADISIMUGIOSpiInit");
bios.UDEV.instance("ADISIMUSpi1").params = prog.extern("spiParamsADISIMU");
bios.UDEV.instance("ADISIMUSpi1").fxnTable = prog.extern("Spi_IOMFXNS");
bios.UDEV.instance("ADISIMUSpi1").deviceId = 1;

The initialisation is as follow:

void ADISIMUGIOSpiInit()
{
 LOG_printf(&trace, "ADISIMUGIOSpiInit() starts.");
 spiParamsADISIMU = Spi_PARAMS;

    spiParamsADISIMU.hwiNumber = 8;
    spiParamsADISIMU.spiHWCfgData.intrLevel = FALSE;
    spiParamsADISIMU.opMode = Spi_OpMode_INTERRUPT;

    spiParamsADISIMU.outputClkFreq     = 1000000;
    spiParamsADISIMU.loopbackEnabled   = FALSE;
    spiParamsADISIMU.edmaHandle        = NULL;

    spiParamsADISIMU.spiHWCfgData.waitDelay = FALSE;//FALSE
    spiParamsADISIMU.spiHWCfgData.configDatafmt[0].charLength   = 8;
    spiParamsADISIMU.spiHWCfgData.configDatafmt[0].clkHigh      = TRUE ;
    spiParamsADISIMU.spiHWCfgData.configDatafmt[0].lsbFirst     = FALSE;
    spiParamsADISIMU.spiHWCfgData.configDatafmt[0].oddParity    = FALSE;
    spiParamsADISIMU.spiHWCfgData.configDatafmt[0].parityEnable = FALSE ;
    spiParamsADISIMU.spiHWCfgData.configDatafmt[0].phaseIn      = FALSE;;
    spiParamsADISIMU.spiHWCfgData.configDatafmt[0].waitEnable   = FALSE;
    spiParamsADISIMU.spiHWCfgData.configDatafmt[0].wDelay       = 0x3F;

    // Power on the spi device in the Power sleep controller
    Psc_ModuleClkCtrl(Psc_DevId_1, CSL_PSC_SPI1, TRUE);

 Spi_init();
 LOG_printf(&trace, "ADISIMUGIOSpiInit() completed.");
}

However, I have more than one device using SPI1. What do I need to do for one GIO_Handle to be able to transmit data to difference devices using different data format? (e.g. one is IsbFirst = FALSE, another is Isb = TRUE)

 

Besides this I also encounter the following issue:

When spiHWCfgData.configDatafmt[0].charLength is set to 8, the transmission works find. But when it is set to 16, data started transmitting around 8 clock cycle late. Is there other setting I need to do for spiHWCfgData.configDatafmt[0].charLength = 16?