sysinit.c

来自「ucos-IIv2.52在TMS320c6416上的移植」· C语言 代码 · 共 33 行

/*********************************************************************
*File:		sysinit.c - initial system,such as tick timer 
*Author:	rongjie 
*Data:		2006.04.20
*modification history:
*DESCRIPTION:
*********************************************************************/

/* includes */

#include "sysinit.h"

/*  INITIAL SYSTEM TICK CLOCK
Description:
	this function is used to initial Timer0 as the tick clock,
Arguments  :
	usTickVal, the tick interval,unit of us(minisecond) 
*/
void sysTickInit(int usTickVal)
{
	*(volatile int *)TIMER_CTL0_ADDR = 0x00000200;
	*(volatile int *)TIMER_PRD0_ADDR = usTickVal*75;
	*(volatile int *)TIMER_CNT0_ADDR = 0;
    
    TIMER_START(TIMER_CTL0_ADDR);
    IRQ_NMI_ENABLE
    IRQ_TIMER0_ENABLE
    
}