main.c

ICETEK–VC5509-A 评估板定时器实验.实验程序的工程中包含了两种源代码

#include "myapp.h"
#include "ICETEK-VC5509-EDU.h"
#include "scancode.h"

void InitMcBSP();
void INTR_init( void );
void TIME_init(void);

int nCount;

main()
{
	nCount=0;
	CLK_init();
	SDRAM_init();
	INTR_init();
	TIME_init();
	InitCTR();
	InitMcBSP();
	CTRGR=2;	// 使能IO
	while ( 1 )
	{
	}
}

void InitMcBSP()
{
	// IOPin: McBSP1.FSX S15  
	//SPCR2.XRST_=0,PCR.XIOEN=1,PCR.FSXM=1,PCR.FSXP=0/1
	SPCR2_1&=0x0fffe;
	PCR1|=0x2800;
}

void interrupt Timer()
{
	nCount++; nCount%=16;
	if ( nCount==0 )
		PCR1^=8;
}

void INTR_init( void )
{
	IVPD=0xd0;
	IVPH=0xd0;
	IER0=0x10;
	DBIER0 =0x10;
	IFR0=0xffff;
	asm(" BCLR INTM");

}

void TIME_init(void)
{
    ioport unsigned int *tim0; 
    ioport unsigned int *prd0; 
    ioport unsigned int *tcr0; 
    ioport unsigned int *prsc0;  
	tim0  =  (unsigned int *)0x1000;
	prd0  =  (unsigned int *)0x1001;
	tcr0  =  (unsigned int *)0x1002;
	prsc0 =  (unsigned int *)0x1003;
   *tcr0 = 0x04f0;
   *tim0 = 0;
   *prd0 = 0xffff;
   *prsc0 = 2;
   *tcr0 = 0x00e0;
}