topic Re: Using SPI port with MC1322x ....what's wrong? in Other NXP Products

Using SPI port with MC1322x ....what's wrong?

stevasway — Wed, 05 May 2010 22:23:32 GMT

I'm trying to use the MC1322x spi port

void SPI_Init()
{
uint32_t Command=0xff;
//CLK
Gpio_SetPinFunction(gGpioPin7_c, gGpioNormalMode_c);
Gpio_SetPinDir(gGpioPin7_c, gGpioDirOut_c);
Gpio_SetPinData(gGpioPin7_c, gGpioPinStateLow_c);

//MOSI
Gpio_SetPinFunction(gGpioPin6_c, gGpioNormalMode_c);
Gpio_SetPinDir(gGpioPin6_c, gGpioDirOut_c);
Gpio_SetPinData(gGpioPin6_c, gGpioPinStateLow_c);

//MISO
Gpio_SetPinFunction(gGpioPin5_c, gGpioAlternate1Mode_c);
Gpio_SetPinDir(gGpioPin5_c, gGpioDirIn_c);
//Gpio_SetPinData(gGpioPin5_c, gGpioPinStateLow_c);

//SS
Gpio_SetPinFunction(gGpioPin4_c, gGpioNormalMode_c);
Gpio_SetPinDir(gGpioPin4_c, gGpioDirOut_c);
Gpio_SetPinData(gGpioPin4_c, gGpioPinStateHigh_c);

pConfig.Setup.Bits.SsSetup       = ConfigSsSetupMasterHigh;
pConfig.Setup.Bits.SsDelay       = ConfigSsDelay1Clk;
pConfig.Setup.Bits.SdoInactive   = ConfigSdoInactiveZ;
pConfig.Setup.Bits.ClockFreq     = ConfigClockFreqDiv256;
pConfig.Setup.Bits.Mode          = ConfigModeMaster;
pConfig.Setup.Bits.S3Wire        = ConfigS3WireInactive;
pConfig.Setup.Bits.ClockPol      = ConfigClockPolPositive;
pConfig.Setup.Bits.ClockPhase    = ConfigClockPhase1stEdge;
pConfig.ClkCtrl.Bits.DataCount   = 8;
pConfig.ClkCtrl.Bits.ClockCount = 8;

ret = SPI_Open();

ret = SPI_SetConfig(&pConfig);

//SPI_SetCallback();

while(1)
{
    Gpio_SetPinData(gGpioPin4_c, gGpioPinStateLow_c);
    ret = SPI_SetTxAsync(Command);
    SPI_StartAsync();
    //SPI_Abort();
    Gpio_SetPinData(gGpioPin4_c, gGpioPinStateHigh_c);
    ret = SPI_GetStatus();
}

What's wrong?

Re: Using SPI port with MC1322x ....what's wrong?

redbee — Thu, 06 May 2010 09:00:08 GMT

See pg. 11-20 of the reference manual, but I'm pretty sure you need to set all of those pins to Alternate mode 1.

-Mar.

Re: Using SPI port with MC1322x ....what's wrong?

stevasway — Thu, 06 May 2010 13:36:38 GMT

It seems to be not enough.

Re: Using SPI port with MC1322x ....what's wrong?

stevasway — Thu, 06 May 2010 14:21:42 GMT

Maybe it is mandatory to set the SPI_ISR? I tried to test the SPI_StartAsync() return value, and it was not

equal to gSpiErrNoError_c, so I inserted the SPI_ISR inititialization, and now the return value is ok.

IntAssignHandler(gSpiInt_c, (IntHandlerFunc_t)SPI_ISR);
ITC_SetPriority(gSpiInt_c, gItcNormalPriority_c);
ITC_EnableInterrupt(gSpiInt_c);

void SPICallBack(void)
{
static int i = 0;
//Maybe something flag to clear?
i++;
}

void SPI_Init()
{
uint32_t Command=0xff;

//CLK
Gpio_SetPinFunction(gGpioPin7_c, gGpioAlternate1Mode_c);
//Gpio_SetPinDir(gGpioPin7_c, gGpioDirOut_c);
//Gpio_SetPinData(gGpioPin7_c, gGpioPinStateLow_c);
//Gpio_SetPinData(gGpioPin7_c, gGpioPinStateHigh_c);

//MOSI
Gpio_SetPinFunction(gGpioPin6_c, gGpioAlternate1Mode_c);
//Gpio_SetPinDir(gGpioPin6_c, gGpioDirOut_c);
//Gpio_SetPinData(gGpioPin6_c, gGpioPinStateLow_c);

//MISO
Gpio_SetPinFunction(gGpioPin5_c, gGpioAlternate1Mode_c);
//Gpio_SetPinDir(gGpioPin5_c, gGpioDirIn_c);
//Gpio_SetPinData(gGpioPin5_c, gGpioPinStateLow_c);

//SS
Gpio_SetPinFunction(gGpioPin4_c, gGpioAlternate1Mode_c);
//Gpio_SetPinDir(gGpioPin4_c, gGpioDirOut_c);
//Gpio_SetPinData(gGpioPin4_c, gGpioPinStateHigh_c);

pConfig.Setup.Bits.SsSetup       = ConfigSsSetupMasterAutoL;
pConfig.Setup.Bits.SsDelay       = ConfigSsDelay1Clk;
pConfig.Setup.Bits.SdoInactive   = ConfigSdoInactiveZ;
pConfig.Setup.Bits.ClockFreq     = ConfigClockFreqDiv2;
pConfig.Setup.Bits.Mode          = ConfigModeMaster;
pConfig.Setup.Bits.S3Wire        = ConfigS3WireInactive;
//pConfig.Setup.Bits.ClockPol      = ConfigClockPolPositive;
//pConfig.Setup.Bits.ClockPhase    = ConfigClockPhase1stEdge;
pConfig.ClkCtrl.Bits.DataCount   = 8;
pConfig.ClkCtrl.Bits.ClockCount = 8;

if (gSpiErrNoError_c == SPI_Open())
{
    if (gSpiErrNoError_c == SPI_SetConfig(&pConfig))
    {
      //SPI_SetCallback((spiCallback_t)SPICallBack);
      while(1)
      {
        Gpio_SetPinData(gGpioPin4_c, gGpioPinStateLow_c);
        if (gSpiErrNoError_c == SPI_SetTxAsync(Command))
        {
          ret = SPI_StartAsync();
          if (gSpiErrNoError_c != ret)
            SPI_Abort();
        }
        Gpio_SetPinData(gGpioPin4_c, gGpioPinStateHigh_c);
      }
    }
}
}

Re: Using SPI port with MC1322x ....what's wrong?

stevasway — Sat, 08 May 2010 14:37:55 GMT

This settings are enough to config the SPI port?

//CLK

Gpio_SetPinFunction(gGpioPin7_c, gGpioAlternate1Mode_c);
//MOSI
Gpio_SetPinFunction(gGpioPin6_c, gGpioAlternate1Mode_c);
//MISO
Gpio_SetPinFunction(gGpioPin5_c, gGpioAlternate1Mode_c);
//SS
Gpio_SetPinFunction(gGpioPin4_c, gGpioAlternate1Mode_c);

the SS is driven automatically using the SPI Libray?