• State
  • Locked Locked
  • Replies 1 reply
  • Subscribers 98 subscribers
  • Views 275 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

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?