example_28xgpio.c

利用ccs环境、MATLAB环境、DSP（TMS320F2812)、被测对象和Agilient网络分析仪E5071B

//
//      TMDX ALPHA RELEASE
//      Intended for product evaluation purposes
//
//###########################################################################
//
// FILE:	Example_28xGpio.c
//
// TITLE:	DSP28 Device GPIO test porgram. 
//		All the GPIO PORT pins IOs will toggle forever in an indefinite
//		loop
//
//###########################################################################
//
//  Ver | dd mmm yyyy | Who  | Description of changes
// =====|=============|======|===============================================
//  0.56| 06 May 2002 | S.S. | EzDSP Alpha Release
//  0.57| 27 May 2002 | L.H. | No change
//###########################################################################
#include "DSP28_Device.h"

void main(void)
{
	int i;
   EALLOW;
   
// On TMX samples, to get the best performance of on chip RAM blocks M0/M1/L0/L1/H0 internal
// control registers bit have to be enabled. The bits are in Device emulation registers.
   DevEmuRegs.M0RAMDFT = 0x0300;
   DevEmuRegs.M1RAMDFT = 0x0300;
   DevEmuRegs.L0RAMDFT = 0x0300;
   DevEmuRegs.L1RAMDFT = 0x0300;
   DevEmuRegs.H0RAMDFT = 0x0300;
   
           
// Disable watchdog module
   SysCtrlRegs.WDCR= 0x0068;

// Initalize PLL
   SysCtrlRegs.PLLCR = 0xA;
   // Wait for PLL to lock
   for(i= 0; i< 5000; i++){}
       
// HISPCP/LOSPCP prescale register settings, normally it will be set to default values
   SysCtrlRegs.HISPCP.all = 0x0001;
   SysCtrlRegs.LOSPCP.all = 0x0002;	
// Peripheral clock enables set for the selected peripherals.   
   SysCtrlRegs.PCLKCR.bit.EVAENCLK=1;
   SysCtrlRegs.PCLKCR.bit.EVBENCLK=1;
   SysCtrlRegs.PCLKCR.bit.SCIENCLKA=1;
   SysCtrlRegs.PCLKCR.bit.SCIENCLKB=1;
   SysCtrlRegs.PCLKCR.bit.MCBSPENCLK=1;
   SysCtrlRegs.PCLKCR.bit.SPIENCLK=1;
   SysCtrlRegs.PCLKCR.bit.ECANENCLK=1;
   SysCtrlRegs.PCLKCR.bit.ADCENCLK=1;				
   EDIS;

// 初始化 GPIO
	GpioMuxRegs.GPAMUX.all=0x0003; // 配置端口A，作为PWM clock和GPIO
	GpioMuxRegs.GPADIR.all=0xffff;
	GpioMuxRegs.GPEMUX.all=0x0003; // 配置端口E为外部中断XINT1,XINT2
	GpioMuxRegs.GPEDIR.all=0x0003;
	GpioMuxRegs.GPEQUAL.all=0x0000;
	GpioMuxRegs.GPFMUX.all=0x0000; 
	GpioMuxRegs.GPFDIR.all=0x0005;
	EDIS;

// GPIO CONFIGURE OK


//	GpioDataRegs.GPFCLEAR.all=0x0001;
//	asm("RPT #200||NOP");
//	GpioDataRegs.GPFSET.all=0x0001;

	DINT;
	IER=0x0000;
	IFR=0x0000;
 
	InitPieCtrl();
	InitPieVectTable();
// 允许外设中断，触发方式为负边沿
 	XIntruptRegs.XINT1CR.all=0x0001;
	XIntruptRegs.XINT2CR.all=0x0001;

	PieCtrl.PIEIER1.bit.INTx3=1;
	PieCtrl.PIEIER1.bit.INTx4=1;
	IER|=0x0001;

	EINT;

// GENERATE SQUARE SIGNAL
	//step1, 初始化定时器，初始化EVA Timer1
	EvaRegs.T1PR=0x0010;	 // Timer1 period
	EvaRegs.T1CMPR=0x0000;	 // Timer1 compare
	EvaRegs.T1CNT=0x0000;	//Timer1 counter
	EvaRegs.T1CON.all=0x9042; 

	//step2,建立T1PWM 和 T2PWM 有比较逻辑驱动T1/T2 PWM
	EvaRegs.GPTCONA.all=0x0000;
	EvaRegs.GPTCONA.bit.T2PIN=2;

	//step3 使能PWM1-PWM6 的比较器
	EvaRegs.CMPR1=0x0008;
	EvaRegs.ACTR.all=0x0002;
	EvaRegs.DBTCONA.all=0x0000;  // 禁止死区设置

	EvaRegs.COMCONA.all=0x8200;
	EvbRegs.ACTRB.all=0x0006;
	EvbRegs.DBTCONB.all=0x0000;
	EvbRegs.COMCONB.all=0xA600;

// END SQUARE SIGNAL


      EALLOW;
	 
 //  PieCtrl.PIEIFR1.bit.INTx4=1;
	for(;;)
	{
//	GpioDataRegs.GPADAT.bit.GPIOA0=0;
//	GpioDataRegs.GPADAT.bit.GPIOA0=1;
	}
}