www.pudn.com > DPS2812_LCD.rar > DSP28_Spi.c

// 
//      TMDX ALPHA RELEASE 
//      Intended for product evaluation purposes 
// 
//########################################################################### 
// 
// FILE:	DSP28_Spi.c 
// 
// TITLE:	DSP28 SPI Initialization & Support Functions. 
// 
//########################################################################### 
// 
//  Ver | dd mmm yyyy | Who  | Description of changes 
// =====|=============|======|=============================================== 
//  0.55| 06 May 2002 | L.H. | EzDSP Alpha Release 
//  0.56| 20 May 2002 | L.H. | No change 
//  0.57| 27 May 2002 | L.H. | No change 
//########################################################################### 
 
#include "DSP28_Device.h" 
 
//--------------------------------------------------------------------------- 
// InitSPI:  
//--------------------------------------------------------------------------- 
// This function initializes the SPI(s) to a known state. 
// 
void InitSpi(void) 
{ 
	// Initialize SPI-A: 
		// Initialize SCI-A: 
	EALLOW; 
	GpioMuxRegs.GPFMUX.all = 0x000f; 
	EDIS; 
	/* loopback   8 bit data */ 
	SpiaRegs.SPICCR.all = 0x1f; 
	 
	SpiaRegs.SPICTL.all = 0x07; 
	 
	SpiaRegs.SPIBRR = 0x7f; 
	 
	SpiaRegs.SPICCR.all = 0x9f; 
	 
 
	PieCtrl.PIEIER6.bit.INTx1 = 1; 
	PieCtrl.PIEIER6.bit.INTx2 = 1; 
	//tbd... 
	//tbd... 
	 
} 
 
unsigned int Spi_TxReady(void) 
{ 
	unsigned int i; 
	if(SpiaRegs.SPISTS.bit.BUFFULL_FLAG == 1) 
	{ 
		i = 0; 
	} 
	else 
	{ 
		i = 1; 
	} 
	return(i); 
} 
 
unsigned int Spi_RxReady(void) 
{ 
	unsigned int i; 
	if(SpiaRegs.SPISTS.bit.INT_FLAG == 1) 
	{ 
		i = 1; 
	} 
	else 
	{ 
		i = 0; 
	} 
	return(i);	 
} 
 
interrupt void SPIRXINTA_ISR(void);   // SPI 
interrupt void SPITXINTA_ISR(void);    // SPI 
	 
//=========================================================================== 
// No more. 
//===========================================================================