www.pudn.com > xshDSP28_Sci.rar > xshDSP28_Sci.c

// 
//      TMDX ALPHA RELEASE 
//      Intended for product evaluation purposes 
// 
//########################################################################### 
// 
// FILE:	DSP28_Sci.c 
// 
// TITLE:	DSP28 SCI 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 InitSci(void) 
{ 
	// Initialize SCI-A: 
	 
	EALLOW; 
	GpioMuxRegs.GPFMUX.all = 0x0030; 
	EDIS; 
	/* loopback   8 bit data */ 
	SciaRegs.SCICCR.all = 0x07;	// 1 bit stop, disable parity, idle mode, 8 bits data  
	 
	SciaRegs.SCICTL1.all = 0x03; // enable TX  
	SciaRegs.SCICTL2.all = 0x03; // 
	 
	SciaRegs.SCIHBAUD = 0x00; 
	SciaRegs.SCILBAUD = 0xF3; 
	 
	SciaRegs.SCICTL1.all = 0x23; 
	 
	PieCtrl.PIEIER9.bit.INTx1 = 1; 
	PieCtrl.PIEIER9.bit.INTx2 = 1; 
	//tbd... 
 	 
 
	// Initialize SCI-B: 
 
	//tbd... 
} 
 
/******************************************************************************** 
	name:	int SciaTx_Ready(void) 
	input:	none 
	output:	i	1:	ready 
			0:	busy 
*********************************************************************************/ 
 
int SciaTx_Ready(void) 
{ 
	unsigned int i; 
	if(SciaRegs.SCICTL2.bit.TXRDY == 1) 
	{ 
		i = 1; 
	} 
	else 
	{ 
		i = 0; 
	} 
	return(i); 
} 
 
/******************************************************************************** 
	name:	int SciaRx_Ready(void) 
	input:	none 
	output:	i	1:	new data 
			0:	none 
*********************************************************************************/ 
 
int SciaRx_Ready(void) 
{ 
	unsigned int i; 
	if(SciaRegs.SCIRXST.bit.RXRDY == 1) 
	{ 
		i = 1; 
	} 
	else 
	{ 
		i = 0; 
	} 
	return(i); 
} 
 
 
	 
//=========================================================================== 
// No more. 
//===========================================================================