core_timer.c

来自「bf533平台图像采集程序」· C语言 代码 · 共 37 行

#include <cdefBF533.h>
#include <ccblkfn.h>
#include <sys\exception.h>

#include "pll_detect.h"

unsigned int ctime = 0;

//#pragma interrupt_reentrant  
//#pragma interrupt 
//section("L1_code") void ctimer_isr(void)
EX_INTERRUPT_HANDLER(ctimer_isr);
EX_INTERRUPT_HANDLER(ctimer_isr)
{
	ctime++;
} 

void ctimer_init()
{
	//TPERIOD*TSCALE/(delay_unit*1M)=0.1S
	
	unsigned int tick = delay_unit*100*4; ///100ms中断一次  
	
	register_handler(ik_timer, ctimer_isr);	
	*pTCNTL		= 0;
	*pTPERIOD	= tick;
	*pTSCALE	= 250; 
	*pTCNTL		|= TMPWR;
	*pTCNTL		|= TMREN | TAUTORLD;
	
	ctime = 0;
}