dsp28_ev.c

能够实现PWM输出功能

//
//      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"
extern Uint16	XPWM;
//---------------------------------------------------------------------------
// InitEv: 
//---------------------------------------------------------------------------
// This function initializes to a known state.
//
void InitEv(void)
{
	EALLOW;
	GpioMuxRegs.GPAMUX.all =0x07FF;
	GpioMuxRegs.GPADIR.all =0x00FF;
	GpioMuxRegs.GPAQUAL.all=0x0002;

	GpioMuxRegs.GPFMUX.all =0x00F0;
	GpioMuxRegs.GPFDIR.all =0xFF50;
	EDIS;

    GpioDataRegs.GPFCLEAR.bit.GPIOF10 = 1;
	GpioDataRegs.GPFSET.bit.GPIOF12 = 1;
	GpioDataRegs.GPFCLEAR.bit.GPIOF13 = 1;


	EvaRegs.EVAIFRA.all = 0xFFFF;		//  清除中断标志 

	EvaRegs.EXTCONA.bit.INDCOE= 1;	
	EvaRegs.GPTCONA.all= 0x007A;	
	EvaRegs.T1PR = 0xFF00;				//定时器1周期值,定时0.4us*2500=1ms
	EvaRegs.T1CMPR = 0x8000;				//比较值
	EvaRegs.T1CNT = 0;					/* timer1 count is zero */
	EvaRegs.T1CON.all = 0xF546;			//增模式, TPS系数80M/32=2.5M,T1使能,



	EvaRegs.CMPR1 = 0xE000;
	EvaRegs.CMPR2 = 0xE000;
	EvaRegs.CMPR3 = 0xE000;

	EvaRegs.ACTR.all = 0x0AAA;			//PWM1,2低有效 
	EvaRegs.DBTCONA.all = 0x05F0;        //使能死区定时器1,分频80M/32=2.5M,死区时间5*0.4us=2us  
	EvaRegs.COMCONA.all = 0xA6E0;       //比较控制寄存器
	EvaRegs.EVAIMRA.all = 0x0000;
}	
//===========================================================================
// No more.
//===========================================================================