turn on and off periodically SPI in delfino

Hi,

What method you are planning to use to turn SPI module on/off ?

Regards,

Vivek Singh

I want to use the same SPI for more devices that use different BAUD, CLKPOLARITY and CLK_PHASE

I have to polling this devices

I want to write a single routine

void Spi_SetUp(Spi spi, int CLKPOLARITY, int CLK_PHASE, int SPIBRR ) // imposta registri
{
	EALLOW; // codice per F2837xD
	if(spi==&SpiaRegs) { CpuSysRegs.PCLKCR8.bit.SPI_A = 0; asm(" RPT #3 || NOP"); CpuSysRegs.PCLKCR8.bit.SPI_A = 1; }
	if(spi==&SpibRegs) { CpuSysRegs.PCLKCR8.bit.SPI_B = 0; asm(" RPT #3 || NOP"); CpuSysRegs.PCLKCR8.bit.SPI_B = 1; }
	if(spi==&SpicRegs) { CpuSysRegs.PCLKCR8.bit.SPI_C = 0; asm(" RPT #3 || NOP"); CpuSysRegs.PCLKCR8.bit.SPI_C = 1; }
	EDIS;

	(*spi).SPIFFTX.all				= 0xE040;
    (*spi).SPIFFRX.all				= 0x2044;
    (*spi).SPIFFCT.all				= 0x0;

	(*spi).SPICCR.all				= 0x0007;			// Reset on, rising edge, 16-bit char bits
	(*spi).SPICTL.all 				= 0x0006;			// Enable master mode, normal phase, enable talk, and SPI int disabled.

    (*spi).SPICCR.all				= 0x0097;			// Relinquish SPI from Reset

    (*spi).SPIFFTX.all				= 0xE040;
    (*spi).SPIFFRX.all				= 0x2044;
    (*spi).SPIFFCT.all				= 0x0;
	(*spi).SPICCR.bit.SPILBK		= 0;				// loop back disabled

	(*spi).SPICCR.bit.CLKPOLARITY	= CLKPOLARITY;		//1900 di SPRUHM8C–December 2013–Revised December 2014
	(*spi).SPICTL.bit.CLK_PHASE	= CLK_PHASE;		//1902 di SPRUHM8C–December 2013–Revised December 2014

(*spi).SPIBRR = SPIBRR ;
}

is it too much ?

Hello Mauro,

I am using the SPIA (TMS320F28335) with two different clock polarities and it seems to be working ok (for many many months).

Changing the spi registers are changed as shown below.

HTH,

Stephen

    SpiaRegs.SPICCR.bit.SPISWRESET = 0;      // Clear SPI Status Flags
    SpiaRegs.SPIFFTX.bit.SPIRST = 0;

    ...Change SPI registers....

    SpiaRegs.SPIFFTX.bit.SPIRST = 1;
    SpiaRegs.SPICCR.bit.SPISWRESET = 1;      // Ready to tx or rx the next character.

Hello Mauro,

I didn't read your second post, so I misunderstood what you were trying to do.

There's no problem with using a single function to initialize any one of the three SPI peripherals.  There's only one SPI on the TMS320F28335, so  I didn't do it that way.  However, I did do it for the Serial port (i.e. SCI).

What did you originally mean by periodically turning the SPI on and off?

Stephen

thankyou very much,

here my acquire,

the code is ok

at page 1880 of SPRUHM8C–December 2013–Revised December 2014