dsp28_sci_aii.c.txt

f2812的串口通讯程序,完整,使用SCIB!

//
//      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.GPGMUX.all = 0x0030;
struct GPFMUX_BITS  {      // bits   description
   Uint16 SPISIMOA_GPIOF0:1; // 0 
   Uint16 SPISOMIA_GPIOF1:1; // 1 
   Uint16 SPICLKA_GPIOF2:1;  // 2 
   Uint16 SPISTEA_GPIOF3:1;  // 3 
   Uint16 SCITXDA_GPIOF4:1;  // 4 
   Uint16 SCIRXDA_GPIOF5:1;  // 5 
   Uint16 CANTXA_GPIOF6:1;   // 6 
   Uint16 CANRXA_GPIOF7:1;   // 7 
   Uint16 MCLKXA_GPIOF8:1;   // 8 
   Uint16 MCLKRA_GPIOF9:1;   // 9 
   Uint16 MFSXA_GPIOF10:1;   // 10
   Uint16 MFSRA_GPIOF11:1;   // 11
   Uint16 MDXA_GPIOF12:1;    // 12
   Uint16 MDRA_GPIOF13:1;    // 13
   Uint16 XF_GPIOF14:1;      // 14
   Uint16 spare_GPIOF15:1;   // 15
         
};


struct GPGMUX_BITS  {      // bits   description
   Uint16 rsvd1:4;           // 3:0
   Uint16 SCITXDB_GPIOG4:1;  // 4 
   Uint16 SCIRXDB_GPIOG5:1;  // 5 
   Uint16 rsvd2:10;          // 15:6

};


	EDIS;
	/* loopback disable  8 bit data */
	ScibRegs.SCICCR.all = 0x07;	// 1 bit stop, disable parity, idle mode, 8 bits data 
	
	ScibRegs.SCICTL1.all = 0x03; // enable TX 
	ScibRegs.SCICTL2.all = 0x03; //
	
	ScibRegs.SCIHBAUD = 0x00;
	ScibRegs.SCILBAUD = 0xA2;  //f3
	
	ScibRegs.SCICTL1.all = 0x23;
	
	PieCtrl.PIEIER9.bit.INTx3 = 1;
	PieCtrl.PIEIER9.bit.INTx4 = 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(ScibRegs.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(ScibRegs.SCIRXST.bit.RXRDY == 1)
	{
		i = 1;
	}
	else
	{
		i = 0;
	}
	return(i);
}


	
//===========================================================================
// No more.
//===========================================================================