timeout.c

来自「关于测试at91sam9260的各种驱动和功能的测试源代码。」· C语言 代码 · 共 41 行

/*************************************** Copyright (c) *************************************************
*
*			            POLAR STAR
*				   北天星国际有限公司
*				   http://www.po-star.com
*
*文 件 名: timeout.c 
*
*编译环境：ADS1.2
*
********************************************************************************************************/


#include "main.h"
#include "timeout.h"

//*----------------------------------------------------------------------------
//* \fn    AT91F_InitTimeout
//* \brief Start a timeout
//*----------------------------------------------------------------------------
void AT91F_InitTimeout(AT91PS_TIMEOUT pTimeout, unsigned int second)
{
	*AT91C_RTTC_RTMR = 0x8000;
	pTimeout->tick = *(AT91C_RTTC_RTVR);
	pTimeout->second = second;
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_TestTimeout
//* \brief Test a timeout, return 0 if the timeout is not reached
//*----------------------------------------------------------------------------
int AT91F_TestTimeout(AT91PS_TIMEOUT pTimeout)
{
	if ((pTimeout->tick != *(AT91C_RTTC_RTVR)) && (pTimeout->second != 0)) {
		pTimeout->tick = *(AT91C_RTTC_RTVR);
		--(pTimeout->second);
	}
	return pTimeout->second;
}