?? dsp280x_spi.c
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// TI File $Revision: /main/3 $
// Checkin $Date: December 2, 2004 15:16:48 $
//###########################################################################
//
// FILE: DSP280x_Spi.c
//
// TITLE: DSP280x SPI Initialization & Support Functions.
//
//###########################################################################
// $TI Release: DSP280x V1.30 $
// $Release Date: February 10, 2006 $
//###########################################################################
#include "DSP280x_Device.h" // DSP280x Headerfile Include File
#include "DSP280x_Examples.h" // DSP280x Examples Include File
//---------------------------------------------------------------------------
// InitSPI:
//---------------------------------------------------------------------------
// This function initializes the SPI(s) to a known state.
//
void InitSpi(void)
{
// Initialize SPI-A/B/C/D
//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();
InitSpibGpio();
#if DSP28_2808 || DSP28_2806
InitSpicGpio();
InitSpidGpio();
#endif // endif DSP28_2808 || DSP28_2806
}
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;
}
void InitSpibGpio()
{
EALLOW;
/* Enable internal pull-up for the selected pins */
// Pull-ups can be enabled or disabled disabled by the user.
// This will enable the pullups for the specified pins.
// Comment out other unwanted lines.
GpioCtrlRegs.GPAPUD.bit.GPIO12 = 0; // Enable pull-up on GPIO12 (SPISIMOB)
// GpioCtrlRegs.GPAPUD.bit.GPIO24 = 0; // Enable pull-up on GPIO24 (SPISIMOB)
GpioCtrlRegs.GPAPUD.bit.GPIO13 = 0; // Enable pull-up on GPIO13 (SPISOMIB)
// GpioCtrlRegs.GPAPUD.bit.GPIO25 = 0; // Enable pull-up on GPIO25 (SPISOMIB)
GpioCtrlRegs.GPAPUD.bit.GPIO14 = 0; // Enable pull-up on GPIO14 (SPICLKB)
// GpioCtrlRegs.GPAPUD.bit.GPIO26 = 0; // Enable pull-up on GPIO26 (SPICLKB)
GpioCtrlRegs.GPAPUD.bit.GPIO15 = 0; // Enable pull-up on GPIO15 (SPISTEB)
// GpioCtrlRegs.GPAPUD.bit.GPIO27 = 0; // Enable pull-up on GPIO27 (SPISTEB)
/* Set qualification for selected pins to asynch only */
// This will select asynch (no qualification) for the selected pins.
// Comment out other unwanted lines.
GpioCtrlRegs.GPAQSEL1.bit.GPIO12 = 3; // Asynch input GPIO12 (SPISIMOB)
// GpioCtrlRegs.GPAQSEL2.bit.GPIO24 = 3; // Asynch input GPIO24 (SPISIMOB)
GpioCtrlRegs.GPAQSEL1.bit.GPIO13 = 3; // Asynch input GPIO13 (SPISOMIB)
// GpioCtrlRegs.GPAQSEL2.bit.GPIO25 = 3; // Asynch input GPIO25 (SPISOMIB)
GpioCtrlRegs.GPAQSEL1.bit.GPIO14 = 3; // Asynch input GPIO14 (SPICLKB)
// GpioCtrlRegs.GPAQSEL2.bit.GPIO26 = 3; // Asynch input GPIO26 (SPICLKB)
GpioCtrlRegs.GPAQSEL1.bit.GPIO15 = 3; // Asynch input GPIO15 (SPISTEB)
// GpioCtrlRegs.GPAQSEL2.bit.GPIO27 = 3; // Asynch input GPIO27 (SPISTEB)
/* Configure SPI-B pins using GPIO regs*/
// This specifies which of the possible GPIO pins will be SPI functional pins.
// Comment out other unwanted lines.
GpioCtrlRegs.GPAMUX1.bit.GPIO12 = 3; // Configure GPIO12 as SPISIMOB
// GpioCtrlRegs.GPAMUX2.bit.GPIO24 = 3; // Configure GPIO24 as SPISIMOB
GpioCtrlRegs.GPAMUX1.bit.GPIO13 = 3; // Configure GPIO13 as SPISOMIB
// GpioCtrlRegs.GPAMUX2.bit.GPIO25 = 3; // Configure GPIO25 as SPISOMIB
GpioCtrlRegs.GPAMUX1.bit.GPIO14 = 3; // Configure GPIO14 as SPICLKB
// GpioCtrlRegs.GPAMUX2.bit.GPIO26 = 3; // Configure GPIO26 as SPICLKB
GpioCtrlRegs.GPAMUX1.bit.GPIO15 = 3; // Configure GPIO15 as SPISTEB
// GpioCtrlRegs.GPAMUX2.bit.GPIO27 = 3; // Configure GPIO27 as SPISTEB
EDIS;
}
#if DSP28_2808 || DSP28_2806
void InitSpicGpio()
{
EALLOW;
/* Enable internal pull-up for the selected pins */
// Pull-ups can be enabled or disabled disabled by the user.
// This will enable the pullups for the specified pins.
// Comment out other unwanted lines.
GpioCtrlRegs.GPAPUD.bit.GPIO20 = 0; // Enable pull-up on GPIO20 (SPISIMOC)
GpioCtrlRegs.GPAPUD.bit.GPIO21 = 0; // Enable pull-up on GPIO21 (SPISOMIC)
GpioCtrlRegs.GPAPUD.bit.GPIO22 = 0; // Enable pull-up on GPIO22 (SPICLKC)
GpioCtrlRegs.GPAPUD.bit.GPIO23 = 0; // Enable pull-up on GPIO23 (SPISTEC)
/* 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.GPIO20 = 3; // Asynch input GPIO20 (SPISIMOC)
GpioCtrlRegs.GPAQSEL2.bit.GPIO21 = 3; // Asynch input GPIO21 (SPISOMIC)
GpioCtrlRegs.GPAQSEL2.bit.GPIO22 = 3; // Asynch input GPIO22 (SPICLKC)
GpioCtrlRegs.GPAQSEL2.bit.GPIO23 = 3; // Asynch input GPIO23 (SPISTEC)
/* Configure SPI-C 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.GPIO20 = 2; // Configure GPIO20 as SPISIMOC
GpioCtrlRegs.GPAMUX2.bit.GPIO21 = 2; // Configure GPIO21 as SPISOMIC
GpioCtrlRegs.GPAMUX2.bit.GPIO22 = 2; // Configure GPIO22 as SPICLKC
GpioCtrlRegs.GPAMUX2.bit.GPIO23 = 2; // Configure GPIO23 as SPISTEC
EDIS;
}
#endif // endif DSP28_2808 || DSP28_2806
#if DSP28_2808 || DSP28_2806
void InitSpidGpio()
{
EALLOW;
/* Enable internal pull-up for the selected pins */
// Pull-ups can be enabled or disabled disabled by the user.
// This will enable the pullups for the specified pins.
// Comment out other unwanted lines.
GpioCtrlRegs.GPAPUD.bit.GPIO1 = 0; // Enable pull-up on GPIO1 (SPISIMOD)
GpioCtrlRegs.GPAPUD.bit.GPIO3 = 0; // Enable pull-up on GPIO3 (SPISOMID)
GpioCtrlRegs.GPAPUD.bit.GPIO5 = 0; // Enable pull-up on GPIO5 (SPICLKD)
GpioCtrlRegs.GPAPUD.bit.GPIO7 = 0; // Enable pull-up on GPIO7 (SPISTED)
/* Set qualification for selected pins to asynch only */
// This will select asynch (no qualification) for the selected pins.
// Comment out other unwanted lines.
GpioCtrlRegs.GPAQSEL1.bit.GPIO1 = 3; // Asynch input GPIO1 (SPISIMOD)
GpioCtrlRegs.GPAQSEL1.bit.GPIO3 = 3; // Asynch input GPIO3 (SPISOMID)
GpioCtrlRegs.GPAQSEL1.bit.GPIO5 = 3; // Asynch input GPIO5 (SPICLKD)
GpioCtrlRegs.GPAQSEL1.bit.GPIO7 = 3; // Asynch input GPIO7 (SPISTED)
/* Configure SPI-D pins using GPIO regs*/
// This specifies which of the possible GPIO pins will be SPI functional pins.
// Comment out other unwanted lines.
GpioCtrlRegs.GPAMUX1.bit.GPIO1 = 2; // Configure GPIO1 as SPISIMOD
GpioCtrlRegs.GPAMUX1.bit.GPIO3 = 2; // Configure GPIO3 as SPISOMID
GpioCtrlRegs.GPAMUX1.bit.GPIO5 = 2; // Configure GPIO5 as SPICLKD
GpioCtrlRegs.GPAMUX1.bit.GPIO7 = 2; // Configure GPIO7 as SPISTED
EDIS;
}
#endif // endif DSP28_2808 || DSP28_2806
//===========================================================================
// End of file.
//===========================================================================
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