// TI File $Revision: /main/1 $
// Checkin $Date: August 14, 2008   16:58:49 $
//###########################################################################
//
// FILE:   DSP2802x_Spi.c
//
// TITLE:  DSP2802x SPI Initialization & Support Functions.
//
//###########################################################################
// $TI Release: 2802x C/C++ Header Files and Peripheral Examples V1.28 $
// $Release Date: October 15, 2010 $
//###########################################################################

#include "DSP2802x_Device.h"     // DSP2802x Headerfile Include File
#include "DSP2802x_Examples.h"   // DSP2802x Examples Include File

//---------------------------------------------------------------------------
// InitSPI:
//---------------------------------------------------------------------------
// This function initializes the SPI(s) to a known state.
//
void InitSpi(void)
{
   // Initialize SPI-A

   //tbd...

}

//---------------------------------------------------------------------------
// Example: InitSpiGpio:
//---------------------------------------------------------------------------
// This function initializes GPIO pins to function as SPI pins
//
// Each GPIO pin can be configured as a GPIO pin or up to 3 different
// peripheral functional pins. By default all pins come up as GPIO
// inputs after reset.
//
// Caution:
// For each SPI peripheral
// Only one GPIO pin should be enabled for SPISOMO operation.
// Only one GPIO pin should be enabled for SPISOMI operation.
// Only one GPIO pin should be enabled for SPICLKA operation.
// Only one GPIO pin should be enabled for SPISTEA operation.
// Comment out other unwanted lines.

void InitSpiGpio()
{

   InitSpiaGpio();
}

void InitSpiaGpio()
{

   EALLOW;

/* Enable internal pull-up for the selected pins */
// Pull-ups can be enabled or disabled by the user.
// This will enable the pullups for the specified pins.
// Comment out other unwanted lines.

    GpioCtrlRegs.GPAPUD.bit.GPIO16 = 0;   // Enable pull-up on GPIO16 (SPISIMOA)
    GpioCtrlRegs.GPAPUD.bit.GPIO17 = 0;   // Enable pull-up on GPIO17 (SPISOMIA)
    GpioCtrlRegs.GPAPUD.bit.GPIO18 = 0;   // Enable pull-up on GPIO18 (SPICLKA)
    GpioCtrlRegs.GPAPUD.bit.GPIO19 = 0;   // Enable pull-up on GPIO19 (SPISTEA)

/* Set qualification for selected pins to asynch only */
// This will select asynch (no qualification) for the selected pins.
// Comment out other unwanted lines.

    GpioCtrlRegs.GPAQSEL2.bit.GPIO16 = 3; // Asynch input GPIO16 (SPISIMOA)
    GpioCtrlRegs.GPAQSEL2.bit.GPIO17 = 3; // Asynch input GPIO17 (SPISOMIA)
    GpioCtrlRegs.GPAQSEL2.bit.GPIO18 = 3; // Asynch input GPIO18 (SPICLKA)
    GpioCtrlRegs.GPAQSEL2.bit.GPIO19 = 3; // Asynch input GPIO19 (SPISTEA)

/* Configure SPI-A pins using GPIO regs*/
// This specifies which of the possible GPIO pins will be SPI functional pins.
// Comment out other unwanted lines.

    GpioCtrlRegs.GPAMUX2.bit.GPIO16 = 1; // Configure GPIO16 as SPISIMOA
    GpioCtrlRegs.GPAMUX2.bit.GPIO17 = 1; // Configure GPIO17 as SPISOMIA
    GpioCtrlRegs.GPAMUX2.bit.GPIO18 = 1; // Configure GPIO18 as SPICLKA
    GpioCtrlRegs.GPAMUX2.bit.GPIO19 = 1; // Configure GPIO19 as SPISTEA

    EDIS;
}

//===========================================================================
// End of file.
//===========================================================================