dsp28_ev.c

利用DSP2812发出频率为7500Hz的方波

//
//      TMDX ALPHA RELEASE
//      Intended for product evaluation purposes
//
//###########################################################################
//
// FILE:	DSP28_Ev.c
//
// TITLE:	DSP28 Event Manager 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"

//---------------------------------------------------------------------------
// InitEv: 
//---------------------------------------------------------------------------
// This function initializes to a known state.
//
void InitEv(void)
{
	EALLOW;
	GpioMuxRegs.GPAMUX.bit.T1PWM_GPIOA6 = 1;
	GpioMuxRegs.GPAMUX.bit.CAP1Q1_GPIOA8 = 1;
	EDIS;
	
	EvaRegs.GPTCONA.all = 0x0859;		/* gp timer control register */
	EvaRegs.T1CNT = 0x0000;					/* timer1 count is zero */
	EvaRegs.T1CON.all = 0x1842;
	EvaRegs.T1PR = 0x2710;
	EvaRegs.T1CMPR = EvaRegs.T1PR/2;


	EvaRegs.T2CNT = 0x0000;
	EvaRegs.T2CON.all = 0x0000;
    EvaRegs.T2CON.bit.TMODE=2;
	EvaRegs.T2CON.bit.TPS=5;
	EvaRegs.T2CON.bit.TENABLE=1;
	EvaRegs.T2PR = 0xffff;

	EvaRegs.CAPCON.all = 0x0000;
	EvaRegs.CAPCON.bit.CAPQEPN = 1;
    EvaRegs.CAPCON.bit.CAP1EDGE = 1;
    EvaRegs.CAPCON.bit.CAP12TSEL = 0;

	EvaRegs.CAPFIFO.bit.CAP1FIFO = 0;

    EvaRegs.EVAIMRC.bit.CAP1INT = 1;
    EvaRegs.EVAIFRC.bit.CAP1INT = 1;
}

  /*void CAP1Init(void)
{
    EvaRegs.CAP1FBOT = 0x0000;
    EvaRegs.CAP1FIFO = 0x0000;
    EvaRegs.CAPFIFO.all = 0x0000;
    EvaRegs.T2CNT = 0x0000;
    EvaRegs.T2PR = 0x2710;
    EvaRegs.T2CON.all = 0x1842;
    EvaRegs.CAPCON.all = 0x0440;
	
  }*/
//===========================================================================
// No more.
//===========================================================================